ORCID Profile
0000-0001-6930-0413
Current Organisations
Nanyang Technological University
,
Hunan University
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Publisher: IOP Publishing
Date: 07-2019
DOI: 10.1088/1742-6596/1268/1/012065
Abstract: This article considers the nonlinear dynamic model formulated as the system of differential and operator equations. This system is assumed to enjoy an equilibrium point. The Cauchy problem with the initial condition with respect to one of the desired functions is formulated. The second function controls the corresponding nonlinear dynamic process. The sufficient conditions of the global classical solution’s existence and stabilisation at infinity to the equilibrium point are formulated. The solution can be constructed by the method of successive approximations. If the conditions of the main theorem are not satisfied, then several solutions may exist. Some solutions can blow-up in a finite time, while others stabilise to an equilibrium point. The special case of considered dynamic models are differential-algebraic equations which model various nonlinear phenomena in circuit analysis, power systems, chemical processes and many other processes.
Publisher: IEEE
Date: 10-2010
Publisher: IEEE
Date: 09-2018
Publisher: Elsevier BV
Date: 02-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2019
Publisher: CRC Press
Date: 06-05-2015
DOI: 10.1201/B18409-88
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2019
Publisher: Institution of Engineering and Technology (IET)
Date: 2011
Publisher: IEEE
Date: 18-11-2022
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2022
Publisher: EDP Sciences
Date: 2021
DOI: 10.1051/E3SCONF/202125201003
Abstract: With the rapid development of the flexible loads and energy storage, it is of great scientific and engineering value to improve safety and economy of the receiving-end power system with HVDC feed-in power by the coordinated generation-grid-load-storage control. In this paper, a fuzzy inference based method is proposed to assess the coordinated control ability of generation-grid-load-storage control for the receiving-end power system with HVDC feed-in power. First of all, the evaluation indexes are constructed with consideration of the coordination and interaction of power generation, power grid, power load and energy storage. Both subjective weight and objective weight are considered to calculate the comprehensive weight for each evaluation index. Furthermore, the Kmeans clustering based method is proposed to the grading in each evaluation index. Finally, the coordination control ability of the modified IEEE 57-bus system in different states is evaluated by the proposed method.
Publisher: IEEE
Date: 06-2018
Publisher: American Scientific Publishers
Date: 30-05-2012
Publisher: IEEE
Date: 06-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2022
Publisher: American Medical Association (AMA)
Date: 10-01-2017
Abstract: Elevated systolic blood (SBP) pressure is a leading global health risk. Quantifying the levels of SBP is important to guide prevention policies and interventions. To estimate the association between SBP of at least 110 to 115 mm Hg and SBP of 140 mm Hg or higher and the burden of different causes of death and disability by age and sex for 195 countries and territories, 1990-2015. A comparative risk assessment of health loss related to SBP. Estimated distribution of SBP was based on 844 studies from 154 countries (published 1980-2015) of 8.69 million participants. Spatiotemporal Gaussian process regression was used to generate estimates of mean SBP and adjusted variance for each age, sex, country, and year. Diseases with sufficient evidence for a causal relationship with high SBP (eg, ischemic heart disease, ischemic stroke, and hemorrhagic stroke) were included in the primary analysis. Mean SBP level, cause-specific deaths, and health burden related to SBP (≥110-115 mm Hg and also ≥140 mm Hg) by age, sex, country, and year. Between 1990-2015, the rate of SBP of at least 110 to 115 mm Hg increased from 73 119 (95% uncertainty interval [UI], 67 949-78 241) to 81 373 (95% UI, 76 814-85 770) per 100 000, and SBP of 140 mm Hg or higher increased from 17 307 (95% UI, 17 117-17 492) to 20 526 (95% UI, 20 283-20 746) per 100 000. The estimated annual death rate per 100 000 associated with SBP of at least 110 to 115 mm Hg increased from 135.6 (95% UI, 122.4-148.1) to 145.2 (95% UI 130.3-159.9) and the rate for SBP of 140 mm Hg or higher increased from 97.9 (95% UI, 87.5-108.1) to 106.3 (95% UI, 94.6-118.1). For loss of DALYs associated with systolic blood pressure of 140 mm Hg or higher, the loss increased from 95.9 million (95% uncertainty interval [UI], 87.0-104.9 million) to 143.0 million (95% UI, 130.2-157.0 million) [corrected], and for SBP of 140 mm Hg or higher, the loss increased from 5.2 million (95% UI, 4.6-5.7 million) to 7.8 million (95% UI, 7.0-8.7 million). The largest numbers of SBP-related deaths were caused by ischemic heart disease (4.9 million [95% UI, 4.0-5.7 million] 54.5%), hemorrhagic stroke (2.0 million [95% UI, 1.6-2.3 million] 58.3%), and ischemic stroke (1.5 million [95% UI, 1.2-1.8 million] 50.0%). In 2015, China, India, Russia, Indonesia, and the United States accounted for more than half of the global DALYs related to SBP of at least 110 to 115 mm Hg. In international surveys, although there is uncertainty in some estimates, the rate of elevated SBP (≥110-115 and ≥140 mm Hg) increased substantially between 1990 and 2015, and DALYs and deaths associated with elevated SBP also increased. Projections based on this s le suggest that in 2015, an estimated 3.5 billion adults had SBP of at least 110 to 115 mm Hg and 874 million adults had SBP of 140 mm Hg or higher.
Publisher: Institution of Engineering and Technology (IET)
Date: 12-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2021
Publisher: Wiley
Date: 29-09-2022
DOI: 10.1002/JNM.3064
Abstract: In this paper, the historical network loss is calculated by using the cleaned historical data collected by the user electricity meter, the transformer gateway meter every 15 min and the gateway meter of the transformer substation every half an hour. Use machine learning technologies to analyze the loss of distribution network, reveal the changing law of distribution network loss and its influencing factors (electrical/non‐electrical parameters), and predict future distribution network loss. Pearson correlation, characteristics of the Random Forest important attributes and MIC (Maximal Information Coefficient) are adopted to analyze correlations between the power network loss and the electrical parameters such as unbalanced three‐phase, power factor, load rate, active power, reactive power together with atmospheric factors (temperature, humidity, and wind speed). The factors strongly related to network loss as the input of the multi‐parallel input multi‐step output stacking LSTM (Long Term Memory) prediction model to predict network loss. The simulation data in this paper comes from the actual data of 44 subareas of the 10 KV distribution network. The experimental results show that the data cleaning methods: the cluster‐based Local Outlier Factor algorithm and the improved Random Forest imputation algorithm are effective for enhancing the prediction accuracy. Especially the improved Random Forest algorithm is robust to all missing forms. Compared with the baseline model, the multi‐parallel input multi‐step output stacking LSTM prediction model has higher forecasting accuracy.
Publisher: BMJ
Date: 08-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2023
Publisher: IEEE
Date: 11-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2022
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2018
Publisher: IEEE
Date: 10-2017
Publisher: IEEE
Date: 10-2018
Publisher: American Scientific Publishers
Date: 30-05-2012
Publisher: Elsevier BV
Date: 07-2018
Publisher: IEEE
Date: 07-2018
Publisher: Elsevier BV
Date: 2020
Publisher: IEEE
Date: 06-2018
Publisher: Elsevier BV
Date: 2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2022
Publisher: Institution of Engineering and Technology (IET)
Date: 15-03-2017
Publisher: IEEE
Date: 08-2018
Publisher: IEEE
Date: 06-2020
Publisher: IEEE
Date: 10-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2019
Publisher: IEEE
Date: 11-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2022
Publisher: Institution of Engineering and Technology (IET)
Date: 09-2015
Publisher: Hindawi Limited
Date: 25-06-2015
DOI: 10.1002/ETEP.1954
Publisher: IEEE
Date: 03-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2022
Publisher: MDPI AG
Date: 06-03-2020
DOI: 10.3390/EN13051226
Abstract: Tourism development in ecologically vulnerable areas like the lake Baikal region in Eastern Siberia is a challenging problem. To this end, the dynamical models of AC/DC hybrid isolated power system consisting of four power grids with renewable generation units and energy storage systems are proposed using the advanced methods based on deep reinforcement learning and integral equations. First, the wind and solar irradiance potential of several sites on the lake Baikal’s banks is analyzed as well as the electric load as a function of the climatic conditions. The optimal selection of the energy storage system components is supported in online mode. The approach is justified using the retrospective meteorological datasets. Such a formulation will allow us to develop a number of valuable recommendations related to the optimal control of several autonomous AC/DC hybrid power systems with different structures, equipment composition and kind of AC or DC current. Developed approach provides the valuable information at different stages of AC/DC hybrid power systems projects development with stand-alone hybrid solar-wind power generation systems.
Publisher: Institution of Engineering and Technology (IET)
Date: 22-05-2017
Publisher: MDPI AG
Date: 05-03-2020
DOI: 10.3390/EN13051208
Abstract: The reliability analysis method and risk assessment model for the traditional single network no longer meet the requirements of the risk analysis of coupled systems. This paper establishes a risk assessment system of electric-gas integrated energy system (EGIES) considering the risk security of components. According to the mathematical model of each component, the EGIES steady state analysis model considering the operation constraints is established to analyze the operation status of each component. Then the EGIES component accident set is established to simulate the accident consequences caused by the failure of each component to EGIES. Furthermore, EGIES risk assessment system is constructed to identify the vulnerability of EGIES components. Finally, the risk assessment of IEEE14-NG15 system is carried out. The simulation results verify the effectiveness of the proposed method.
Publisher: Elsevier BV
Date: 12-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2020
Publisher: Elsevier BV
Date: 12-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2019
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2022
Publisher: Science China Press., Co. Ltd.
Date: 19-04-2019
Publisher: Elsevier BV
Date: 12-2020
Publisher: IEEE
Date: 30-10-2020
Publisher: IEEE
Date: 06-2015
Publisher: IEEE
Date: 05-2019
Publisher: IEEE
Date: 10-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2012
Publisher: Elsevier BV
Date: 2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2019
Publisher: Elsevier BV
Date: 12-2021
Publisher: IEEE
Date: 11-2019
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2019
Publisher: IEEE
Date: 10-2016
Publisher: Elsevier BV
Date: 06-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2012
Publisher: IEEE
Date: 30-10-2020
Publisher: Springer Singapore
Date: 2020
Publisher: IEEE
Date: 11-2019
Publisher: IEEE
Date: 10-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2019
Publisher: Elsevier BV
Date: 02-2022
Publisher: Springer Science and Business Media LLC
Date: 20-04-2017
DOI: 10.1038/SREP46491
Abstract: Betweenness centrality is an indicator of a node’s centrality in a network. It is equal to the number of shortest paths from all vertices to all others that pass through that node. Most of real-world large networks display a hierarchical community structure, and their betweenness computation possesses rather high complexity. Here we propose a new hierarchical decomposition approach to speed up the betweenness computation of complex networks. The advantage of this new method is its effective utilization of the local structural information from the hierarchical community. The presented method can significantly speed up the betweenness calculation. This improvement is much more evident in those networks with numerous homogeneous communities. Furthermore, the proposed method features a parallel structure, which is very suitable for parallel computation. Moreover, only a small amount of additional computation is required by our method, when small changes in the network structure are restricted to some local communities. The effectiveness of the proposed method is validated via the ex les of two real-world power grids and one artificial network, which demonstrates that the performance of the proposed method is superior to that of the traditional method.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2009
Publisher: IEEE
Date: 22-10-2021
Publisher: IEEE
Date: 06-2019
Publisher: IEEE
Date: 05-2012
Publisher: IEEE
Date: 11-2019
Publisher: Science China Press., Co. Ltd.
Date: 29-04-2016
Publisher: IEEE
Date: 11-2019
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2023
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2021
Publisher: Institution of Engineering and Technology (IET)
Date: 04-12-2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2014
Publisher: Oxford University Press (OUP)
Date: 08-09-2014
Publisher: MDPI AG
Date: 17-02-2020
DOI: 10.3390/EN13040881
Abstract: In order to ensure the information security, most of the important information including the data of advanced metering infrastructure (AMI) in the energy internet is currently transmitted and exchanged through the intranet or the carrier communication. The former increases the cost of network construction, and the latter is susceptible to interference and attacks in the process of information dissemination. The blockchain is an emerging decentralized architecture and distributed computing paradigm. Under the premise that these nodes do not need mutual trust, the blockchain can implement trusted peer-to-peer communication for protecting the important information by adopting distributed consensus mechanisms, encryption algorithms, point-to-point transmission and smart contracts. In response to the above issues, this paper firstly analyzes the information security problems existing in the energy internet from the four perspectives of system control layer, device access, market transaction and user privacy. Then blockchain technology is introduced, and its working principles and technical characteristics are analyzed. Based on the technical characteristics, we propose the multilevel and multichain information transmission model for the weak centralization of scheduling and the decentralization of transaction. Furthermore, we discuss that the information transmission model helps solve some of the information security issues from the four perspectives of system control, device access, market transaction and user privacy. Application ex les are used to illustrate the technical features that benefited from the blockchain for the information security of the energy internet.
Publisher: Springer Science and Business Media LLC
Date: 19-12-2019
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2014
Publisher: American Society of Civil Engineers (ASCE)
Date: 10-2017
Publisher: IEEE
Date: 11-2019
Publisher: Elsevier BV
Date: 05-2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2022
Publisher: IEEE
Date: 12-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2018
Publisher: Elsevier BV
Date: 08-2017
Publisher: IEEE
Date: 10-2016
Publisher: IEEE
Date: 11-2017
Publisher: Elsevier BV
Date: 09-2017
Publisher: IEEE
Date: 10-2010
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2019
Publisher: Springer Science and Business Media LLC
Date: 19-02-2019
DOI: 10.1038/S41598-019-38781-7
Abstract: The threat of a malicious attack is one of the major security problems in complex networks. Resilience is the system-level self-adjusting ability of a complex network to retain its basic functionality and recover rapidly from major disruptions. Despite numerous heuristic enhancement methods, there is a research gap in maximizing network resilience: current heuristic methods are designed to immunize vital nodes or modify a network to a specific onion-like structure and cannot maximize resilience theoretically via network structure. Here we map complex networks onto a physical elastic system to introduce indices of network resilience, and propose a unified theoretical framework and general approach, which can address the optimal problem of network resilience by slightly modifying network structures (i.e., by adding a set of structural edges). We demonstrate the high efficiency of this approach on three realistic networks as well as two artificial random networks. Case studies show that the proposed approach can maximize the resilience of complex networks while maintaining their topological functionality. This approach helps to unveil hitherto hidden functions of some inconspicuous components, which in turn, can be used to guide the design of resilient systems, offer an effective and efficient approach for mitigating malicious attacks, and furnish self-healing to reconstruct failed infrastructure systems.
Publisher: Elsevier BV
Date: 05-2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2021
Publisher: Springer Science and Business Media LLC
Date: 21-07-2022
Publisher: IOP Publishing
Date: 02-2018
Publisher: IEEE
Date: 05-12-2021
Publisher: MDPI AG
Date: 13-11-2020
DOI: 10.3390/EN13225922
Abstract: A high proportion of renewable energy connected to the power grid has caused power quality problems. Voltage-sensitive loads are extremely susceptible to voltage fluctuations, causing power system safety issues and economic losses. Considering the uncertainty factor and the time-varying characteristic, a linearized random ZIP model (constant impedance (Z), constant current (I), and constant power (P)) with time-varying characteristics was proposed. In order to improve the voltage quality of the voltage-sensitive loads in the day-here stage in an active distribution network (ADN), a linearized two-stage active and reactive power coordinated stochastic optimization model was established. The day-ahead active and reactive power coordination optimization was to smooth the large voltage fluctuation and develop a reserve plan to eliminate the unbalanced power caused by the prediction error in the day-here optimization. In the day-here real-time redispatch, the voltage was further improved by the continuous reactive power compensation device. Finally, the simulation results on the IEEE-33 bus system showed that the control strategy could better eliminate the unbalanced power caused by the prediction error and obviously improve the voltage of sensitive loads in the real-time stage on the premise of maintaining economic optimality.
Publisher: IEEE
Date: 22-10-2021
Publisher: Elsevier BV
Date: 2016
Publisher: Universitas Ahmad Dahlan
Date: 09-2017
Publisher: World Scientific Pub Co Pte Lt
Date: 02-09-2016
DOI: 10.1142/S0218126616501620
Abstract: This paper proposes a novel wideband 90[Formula: see text] phase shifter, which comprises a radial stub, a uniform transmission line, and a weak coupled-line (coupling coefficient [Formula: see text] dB). The circuit configuration and theoretical analysis equations of the phase shifter are presented. Results demonstrate that the bandwidth (BW) with acceptable phase deviation can be obviously improved by increasing the spanning angle of the radial-stub and the coupling strength of the coupled-line. For return loss better than 10 dB, insertion loss less than 1.05 dB, and phase deviation of [Formula: see text] 8.5[Formula: see text], the fabricated microstrip single-layer phase shifter exhibits BW of 118% from 0.65 GHz to 2.51 GHz. Compared with existing structures, the proposed phase shifter not only has the largest BW but also features simple structure, low-cost, convenient installation, and good portability.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 02-2023
Publisher: Institution of Engineering and Technology (IET)
Date: 03-06-2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2023
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 1
Publisher: Elsevier BV
Date: 04-2015
Publisher: IEEE
Date: 10-2014
Publisher: IEEE
Date: 06-11-2020
Publisher: Power System Technology Press
Date: 2020
Publisher: Institution of Engineering and Technology (IET)
Date: 07-09-2022
DOI: 10.1049/GTD2.12605
Publisher: IEEE
Date: 11-2019
Publisher: Institution of Engineering and Technology (IET)
Date: 25-04-2019
Publisher: IEEE
Date: 05-2019
Publisher: IEEE
Date: 07-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2023
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2019
Publisher: Springer Science and Business Media LLC
Date: 06-07-2011
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2018
Publisher: IEEE
Date: 06-2011
Publisher: Springer Science and Business Media LLC
Date: 13-04-2022
DOI: 10.1038/S41598-022-10123-0
Abstract: With the rapid development of distributed energy resources and natural gas power generation, multi-energy microgrid (MEMG) is considered as a critical technology to increase the penetration of renewable energy and achieve the target of carbon emission reduction. Therefore, this paper proposes a low-carbon economic dispatch model for MEMG to minimize the daily operation cost by considering integrated demand response (IDR) and multistep carbon trading. Specifically, IDR operation includes shifting of shiftable electric load, adjusting of flexible thermal load and cooling load, and it is employed to decrease operation cost. Besides, the multistep carbon trading means that different carbon trading prices correspond to different carbon trading volumes, which is applied to stringently restrict carbon emission. The simulation results show that the proposed model can effectively reduce the carbon emission while greatly decrease the operation cost.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Publisher: Institution of Engineering and Technology (IET)
Date: 11-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2019
Publisher: Springer Science and Business Media LLC
Date: 13-10-2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2017
Publisher: Institution of Engineering and Technology (IET)
Date: 12-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2018
Publisher: IEEE
Date: 05-2017
Publisher: Institution of Engineering and Technology (IET)
Date: 02-06-2023
DOI: 10.1049/GTD2.12855
Abstract: The access of large‐scale distributed generation (DG) easily leads to energy imbalance in distribution network. To deal with this issue, this paper proposes an energy optimal schedule method for distribution network considering the participation of source‐load‐storage aggregation groups (SAGs). Firstly, the system model consisting of distribution network layer and SAGs layer is established, and the schedule objectives and constraints of each layer are also given. Secondly, considering the fluctuation on the load side, a forecasting method based on Adaboost integrated convolutional neural networks and bidirectional long‐short term memory is proposed. Then, the improved sparrow search algorithm (ISSA) is proposed by using the tent map and Levy flight on the original sparrow search algorithm. At the same time, by introducing Pareto dominance relation and adaptive grid algorithm, the multi‐objective sparrow search algorithm (MOSSA) is derived. After that, a two‐layer optimization framework (ISSA–MOSSA) is proposed to solve the studied system. The simulation results verify the accuracy of the proposed load forecasting model, the superiority of ISSA as well as MOSSA, and the effectiveness of ISSA–MOSSA in solving the energy optimal schedule problem of the distribution system with the access of DG.
Publisher: Institution of Engineering and Technology (IET)
Date: 02-01-2023
DOI: 10.1049/GTD2.12736
Abstract: The extra‐high voltage (EHV) transformer winding disks are subjected to dynamic electromagnetic forces caused by short‐circuit currents. These periodically decaying impact forces may endanger the safety of the transformer. The winding constraint conditions around the circumference are different due to the influence of axial pressure structures and magnetic boundaries. Moreover, this difference becomes more evident as the voltage and capacity increase. To investigate the spatial differences and time effects of EHV transformer short‐circuit faults, this paper proposes a reliability evaluation method based on dynamic relative displacement (DRDEM) for the first time. Firstly, the suitable and efficient analysis method is summarized by comparing the deviation among different calculated impedances and the measured value. Then, the space‐time effect of windings is obtained by the static magnetic field and dynamic structural field based on equivalent compression supports. Furthermore, a 50 MVA/110 kV transformer is designed for the destructive short‐circuit test to simulate the short‐circuit ability feature of the EHV transformer. The disassembly phenomena after all the tests indicate that the DRDEM is more adaptable in characterizing the winding ability to withstand short circuit when investigating the spatial differences and time effects.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2023
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2022
Publisher: IEEE
Date: 10-2010
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2021
Publisher: Elsevier BV
Date: 10-2012
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2021
Publisher: Elsevier BV
Date: 05-2020
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 09-2018
DOI: 10.1161/STROKEAHA.118.022217
Abstract: We aimed to determine whether early mobilization after stroke affects subsequent cognitive function. AVERT (A Very Early Rehabilitation Trial) was an international, 56-site, phase 3 randomized controlled trial, conducted from 2006 to 2015. Participants were included if they were aged 18+, presented within 24 hours of stroke, and satisfied physiological limits for blood pressure, heart rate, and temperature. Participants were randomized to receive either usual stroke unit care or very early and more frequent mobilization in addition to usual stroke unit care. The Montreal Cognitive Assessment, scored 0 to 30, was introduced as a 3-month outcome during 2008. Of the 2104 patients included in AVERT, 317 were assessed before the Montreal Cognitive Assessment’s introduction. Of the remaining 1787, 1189 (66.5%) had complete Montreal Cognitive Assessment data, 456 (25.5%) had partially or completely missing data, 136 (7.6%) had died, and 6 (0.3%) were lost to follow-up. In surviving participants with complete data, adjusting for age and stroke severity, total Montreal Cognitive Assessment score was no different in the intervention (n=595 median, 23 interquartile range, 19–26 mean, 21.9 SD, 5.9) and usual care (n=594 median, 23 interquartile range, 19–26 mean, 21.8 SD, 5.9) groups ( P =0.68). Exposure to earlier and more frequent mobilization in the acute stage of stroke does not influence cognitive outcome at 3 months. This stands in contrast to the primary outcome from AVERT (modified Rankin Scale), where the intervention group had less favorable outcomes than controls. URL: www.anzctr.org.au . Unique identifier: ACTRN12606000185561.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2018
Publisher: Elsevier BV
Date: 12-2019
Publisher: IEEE
Date: 10-2017
Publisher: IEEE
Date: 10-2017
Publisher: IEEE
Date: 06-11-2020
Publisher: IEEE
Date: 10-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2019
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Publisher: IEEE
Date: 06-2016
Publisher: Springer Singapore
Date: 2019
Publisher: Elsevier BV
Date: 2018
Publisher: Elsevier BV
Date: 2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 02-2023
Publisher: IEEE
Date: 28-05-2021
Publisher: Institution of Engineering and Technology (IET)
Date: 08-2016
Publisher: IEEE
Date: 10-2010
Publisher: Springer Nature Singapore
Date: 2023
Publisher: IEEE
Date: 04-2008
Publisher: IEEE
Date: 04-2008
Publisher: IEEE
Date: 04-2008
Publisher: IEEE
Date: 10-2010
Publisher: MDPI AG
Date: 08-10-2021
DOI: 10.3390/EN14196434
Abstract: With the increasing use of sensitive loads in frequency converters and in relays in distribution networks, voltage sag has become a major power quality issue that urgently needs to be solved. For the purpose of improving the understanding of voltage sag severity in distribution networks, a comprehensive weight-based severity evaluation method of voltage sag is presented in this paper. First, a multi-side index system that takes into account the combined influence of the source, network, and the load is established. A comprehensive weight method, which combines the improved analytic hierarchy process (IAHP) and the entropy method, is then adopted to determine the index weight. The weight of each index and the degree of superiority are linearly weighted to obtain the severity of voltage sag at different observation points. Finally, the effectiveness of the proposed method is verified using a distribution network model established in DIgSILENT PowerFactory (15.1.7, Gomaringen, Germany).
Publisher: IEEE
Date: 11-2009
Publisher: MDPI AG
Date: 06-07-2018
DOI: 10.3390/EN11071776
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2021
Publisher: MDPI AG
Date: 15-05-2023
DOI: 10.3390/EN16104101
Abstract: With the gradual increases in the use of wind power and photovoltaic generation, the penetration rate of power electronics has increased in recent years. The inertia characteristics of power-electronic-based power sources are different from those of synchronous generators, making the evaluation of inertia difficult. In this paper, the inertia characteristics of power-electronic-based power sources are analyzed. A measurement-based inertia identification method for power-electronic-based power sources, as well as for high-power-electronic-penetrated power systems, is proposed by fitting the frequency and power data. The inertia characteristics of different control strategies and corresponding control parameters are discussed in a case study. It was proven that the inertia provided by power-electronic-based power sources can be much higher than that provided by a synchronous generator of the same capacity. It was also proven that the inertia provided by power-electronic-based power sources is not a constant value, but changes along with the output power of the sources.
Publisher: IEEE
Date: 15-12-2021
Publisher: IEEE
Date: 11-2016
Publisher: MDPI AG
Date: 20-04-2016
DOI: 10.3390/EN9040302
Publisher: IEEE
Date: 11-2019
Publisher: SAGE Publications
Date: 16-05-2018
Abstract: Retrospective data indicate increased stroke incidence in Aboriginal/Torres Strait Islander (Indigenous) Australians, possibly with poorer outcomes. We present the first prospective population-based stroke incidence study in Indigenous Australians. We pooled data from ASCEND and SEARCH, two prospective “ideal” South Australian stroke incidence studies, ASCEND conducted in urban Northwestern Adelaide (2009–2010) and SEARCH in five South Australian rural centers (2009–2011). We calculated age-standardized incidence for Aboriginal and non-Aboriginal people. The study population comprised 261,403 inhabitants. Among 432 first-ever strokes, 13 were in Aboriginal people (median age 51 vs. 78 years for non-Aboriginal people, p 0.001). Age-standardized stroke incidence per 100,000 in Aboriginal patients (116, 95% CI: 95–137) was nearly two-fold that of non-Aboriginal patients (67, 95% CI: 51–84). Age-stratified excess incidence in Aboriginal people was restricted to those aged 55 years (incidence rate ratio (IRR) 3.5, 95% CI: 2–7), particularly for intracerebral hemorrhage (IRR: 16, 95% CI: 4–61). The excess stroke incidence in Aboriginal South Australians appears substantial, especially in those aged years. Further work is required to delineate and address disparities.
Publisher: IEEE
Date: 11-2019
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 05-2018
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 04-2017
DOI: 10.1161/STROKEAHA.116.016229
Abstract: Despite the benefit of risk awareness in secondary prevention, survivors of stroke are often unaware of their risk factors. We determined whether a nurse-led intervention improved knowledge of risk factors in people with stroke or transient ischemic attack. Prospective study nested within a randomized controlled trial of risk factor management in survivors of stroke or transient ischemic attack. Intervention: 3 nurse education visits and specialist review of care plans. Outcome: unprompted knowledge of risk factors of stroke or transient ischemic attack at 24 months. Effect of intervention on knowledge and factors associated with knowledge were determined using multivariable regression models. Knowledge was assessed in 268 consecutive participants from the main trial, 128 in usual care and 140 in the intervention. Overall, 34% of participants were unable to name any risk factor. In adjusted analyses, the intervention group had better overall knowledge than controls (incidence risk ratio, 1.26 95% confidence interval, 1.00–1.58). Greater functional ability and polypharmacy were associated with better knowledge and older age and having more comorbidities associated with poorer knowledge. Overall knowledge of risk factors of stroke or transient ischemic attack was better in the intervention group than controls. However, knowledge was generally poor. New and more effective strategies are required, especially in subgroups identified as having poor knowledge. URL: www.anzctr.org.au . Unique identifier: ACTRN12608000166370.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2016
Publisher: Elsevier BV
Date: 12-2020
Publisher: Elsevier BV
Date: 2019
Publisher: Institution of Engineering and Technology (IET)
Date: 09-01-2020
Publisher: IEEE
Date: 04-2008
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2015
Publisher: Elsevier BV
Date: 2016
Publisher: IEEE
Date: 08-07-2022
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2017
Publisher: IEEE
Date: 10-2016
Publisher: IEEE
Date: 05-2018
Publisher: IEEE
Date: 05-2018
Publisher: Elsevier BV
Date: 09-2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2020
Publisher: Elsevier BV
Date: 2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 02-2017
Publisher: IEEE
Date: 06-2016
Publisher: IEEE
Date: 10-2010
Publisher: Institution of Engineering and Technology (IET)
Date: 18-12-2019
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 02-2012
Publisher: Elsevier BV
Date: 06-2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2012
Publisher: Elsevier BV
Date: 06-2021
Publisher: Informa UK Limited
Date: 28-11-2022
Publisher: Elsevier BV
Date: 03-2013
Abstract: It has been extensively shown, mainly in US populations, that sugar-sweetened beverages (SSBs) are associated with increased risk of type 2 diabetes (T2D), but less is known about the effects of artificially sweetened beverages (ASBs). We evaluated the association between self-reported SSB, ASB, and 100% fruit juice consumption and T2D risk over 14 y of follow-up in the French prospective Etude Epidémiologique auprès des femmes de la Mutuelle Générale de l'Education Nationale-European Prospective Investigation into Cancer and Nutrition cohort. A total of 66,118 women were followed from 1993, and 1369 incident cases of T2D were diagnosed during the follow-up. Cox regression models were used to estimate HRs and 95% CIs for T2D risk. The average consumption of sweetened beverages in consumers was 328 and 568 mL/wk for SSBs and ASBs, respectively. Compared with nonconsumers, women in the highest quartiles of SSB and ASB consumers were at increased risk of T2D with HRs (95% CIs) of 1.34 (1.05, 1.71) and 2.21 (1.56, 3.14) for women who consumed >359 and >603 mL/wk of SSBs and ASBs, respectively. Strong positive trends in T2D risk were also observed across quartiles of consumption for both types of beverage (P = 0.0088 and P < 0.0001, respectively). In sensitivity analyses, associations were partly mediated by BMI, although there was still a strong significant independent effect. No association was observed for 100% fruit juice consumption. Both SSB consumption and ASB consumption were associated with increased T2D risk. We cannot rule out that factors other than ASB consumption that we did not control for are responsible for the association with diabetes, and randomized trials are required to prove a causal link between ASB consumption and T2D.
Publisher: IEEE
Date: 07-2018
Publisher: Institution of Engineering and Technology (IET)
Date: 24-04-2018
Publisher: MDPI AG
Date: 02-04-2020
DOI: 10.3390/EN13071646
Abstract: Owing to the stochastic states of power systems with large-scale renewable generation, the impact of high-voltage direct current (HVDC) systems on the stability of the power system should be examined in a probabilistic manner. A probabilistic small signal stability assessment methodology to select the best locations for multi-infeed high-voltage direct current systems in alternating current (AC) grids is proposed in this paper. The Latin hypercube s ling-based Monte Carlo simulation approach is taken to generate the stochastic operation scenarios of power systems with the consideration of several stochastic factors, i.e., load demand and power generation. The d ing ratio of the critical oscillation modes and the controllability of power injection to oscillation modes are analyzed by the probabilistic small signal stability. A probabilistic index is proposed to select the best locations of high-voltage direct current systems for improving the d ing of the oscillation modes. The proposed methodology is applied to an IEEE 39 bus system considering the stochastic load demand and power generation. The results of probabilistic small signal stability assessment and a time-domain simulation show that the installation of a high-voltage direct current system on the selected locations can effectively improve the system d ing.
Publisher: Elsevier BV
Date: 2019
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2020
Publisher: IEEE
Date: 08-2017
Publisher: IEEE
Date: 07-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Publisher: IEEE
Date: 08-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2020
Publisher: Elsevier BV
Date: 04-2023
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2018
Publisher: Elsevier BV
Date: 10-2022
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2017
Publisher: IEEE
Date: 06-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2022
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2017
Publisher: Institution of Engineering and Technology (IET)
Date: 25-10-2022
DOI: 10.1049/GTD2.12330
Publisher: SAGE Publications
Date: 10-12-2014
DOI: 10.1111/IJS.12423
Publisher: IEEE
Date: 05-2010
Publisher: IEEE
Date: 15-10-2021
Publisher: Elsevier BV
Date: 2018
Publisher: Elsevier BV
Date: 02-2019
Publisher: Elsevier BV
Date: 12-2019
Publisher: IEEE
Date: 05-2010
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2023
Publisher: Journal of Modern Power Systems and Clean Energy
Date: 2021
Publisher: Hindawi Limited
Date: 05-11-2016
DOI: 10.1002/ETEP.2159
Publisher: Elsevier BV
Date: 04-2023
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 04-05-2016
Publisher: Institution of Engineering and Technology (IET)
Date: 08-2013
Publisher: IEEE
Date: 10-2014
Publisher: Power System Technology Press
Date: 2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2017
Publisher: IEEE
Date: 11-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2023
Publisher: IEEE
Date: 11-2016
Publisher: IEEE
Date: 11-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2018
Publisher: IEEE
Date: 2010
Publisher: Power System Technology Press
Date: 2020
Publisher: Elsevier BV
Date: 10-2018
Publisher: MDPI AG
Date: 27-02-2017
DOI: 10.3390/EN10030280
Publisher: Elsevier BV
Date: 02-2019
Publisher: IEEE
Date: 11-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2019
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Publisher: Springer Berlin Heidelberg
Date: 24-12-2015
Publisher: Springer Berlin Heidelberg
Date: 24-12-2016
Publisher: Springer Berlin Heidelberg
Date: 24-12-2016
Publisher: Elsevier BV
Date: 10-2022
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2020
Publisher: Elsevier BV
Date: 07-2017
Publisher: IEEE
Date: 04-2008
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2017
Publisher: Massachusetts Medical Society
Date: 20-12-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2022
Publisher: Springer Berlin Heidelberg
Date: 24-12-2016
Publisher: Springer Berlin Heidelberg
Date: 24-12-2016
Publisher: Elsevier BV
Date: 07-2017
Publisher: Springer Berlin Heidelberg
Date: 24-12-2016
Publisher: IEEE
Date: 2010
Publisher: IEEE
Date: 11-2019
Publisher: IEEE
Date: 11-2016
Publisher: IEEE
Date: 04-2008
Publisher: IEEE
Date: 11-2019
Publisher: IEEE
Date: 06-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2018
Publisher: Elsevier BV
Date: 02-2022
Publisher: Elsevier BV
Date: 02-2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2016
Publisher: IEEE
Date: 11-2015
Publisher: Elsevier BV
Date: 07-2015
Publisher: IEEE
Date: 04-2008
Publisher: Institution of Engineering and Technology (IET)
Date: 02-2016
Publisher: Institution of Engineering and Technology (IET)
Date: 15-03-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2013
Publisher: IEEE
Date: 11-2019
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2018
Publisher: IEEE
Date: 05-2019
Publisher: Elsevier BV
Date: 08-2015
Publisher: SAGE Publications
Date: 22-03-2017
Abstract: Evidence of the burden of suboptimal stroke care should expedite quality improvement. We aimed to estimate the health and economic impact of improving acute stroke management to best practice standards using Australia as a case study. Hospital performance in Australia was estimated using data from the National Stroke Audit of Acute Services 2013. The percentage of patients provided evidence-based therapies in all hospitals was compared to that achieved in the aggregate of top performing benchmark hospitals (that included between them, a minimum contribution of 15% of all cases audited). The number of additional patients who would receive therapies if this performance gap was rectified was applied to a standardized economic simulation model that comprised stroke rates and resource-use estimates from the North East Melbourne Stroke Incidence Study applied to the 2013 Australian population. In 2013, 41,398 patients were estimated to have been hospitalized with stroke. If acute care was improved to that of Australian benchmarks, there would be an additional 15,317 patients accessing stroke units 1960 receiving thrombolysis and 4007 being treated with antihypertensive medication, 3082 with antiplatelet medication, 2179 with anticoagulant medication, and 3514 with lipid-lowering therapy. Approximately 9329 disability-adjusted life years could be avoided. This additional care provided would be cost effective at AUD 3304 per disability adjusted life year avoided. The benefits of reducing evidence–practice gaps in Australia are considerable. Further investment in initiatives to optimize hospital care is justified.
Publisher: IEEE
Date: 07-09-2022
Publisher: EDP Sciences
Date: 2018
DOI: 10.1051/E3SCONF/20186901015
Abstract: Further growth in renewable energy and planned electrification and decentralization of transport and heating loads in future power systems will result in a more complex unit commitment problem (UCP). This paper proposes an adaptive approach to load leveling problem using novel dynamic models based on the Volterra integral equations of the first kind with piecewise continuous kernels. This approach employs a direct numerical method. The considered collocation-type numerical method has the second-order accuracy and enjoys self-regularization properties, which is associated with confidence levels of system demand. This adaptive approach is suitable for energy storage optimization in real time. The efficiency of the proposed methodology is demonstrated on the Single Electricity Market of the Island of Ireland.
Publisher: IEEE
Date: 10-2017
Publisher: Wiley
Date: 05-11-2016
DOI: 10.1002/TEE.22208
Publisher: IEEE
Date: 18-10-2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2022
Publisher: BMJ
Date: 11-12-2015
DOI: 10.1136/BMJ.H6432
Abstract: To report the number of participants needed to recruit per baby born to trial staff during AVERT, a large international trial on acute stroke, and to describe trial management consequences. Retrospective observational analysis. 56 acute stroke hospitals in eight countries. 1074 trial physiotherapists, nurses, and other clinicians. Number of babies born during trial recruitment per trial participant recruited. With 198 site recruitment years and 2104 patients recruited during AVERT, 120 babies were born to trial staff. Births led to an estimated 10% loss in time to achieve recruitment. Parental leave was linked to six trial site closures. The number of participants needed to recruit per baby born was 17.5 (95% confidence interval 14.7 to 21.0) additional trial costs associated with each birth were estimated at 5736 Australian dollars on average. The staff absences registered in AVERT owing to parental leave led to delayed trial recruitment and increased costs, and should be considered by trial investigators when planning research and estimating budgets. However, the celebration of new life became a highlight of the annual AVERT collaborators' meetings and helped maintain a cohesive collaborative group. Australian New Zealand Clinical Trials Registry no 12606000185561. Participation in a rehabilitation trial does not guarantee successful reproductive activity.
Publisher: IEEE
Date: 05-2010
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2016
Publisher: Elsevier BV
Date: 09-2020
Publisher: Elsevier BV
Date: 07-2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2019
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 02-2013
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2017
Publisher: IOP Publishing
Date: 21-01-2019
Publisher: Springer Science and Business Media LLC
Date: 15-08-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2022
Publisher: Elsevier BV
Date: 12-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2021
Publisher: IEEE
Date: 07-2015
Publisher: Institution of Engineering and Technology (IET)
Date: 24-06-2021
DOI: 10.1049/GTD2.12169
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Publisher: MDPI AG
Date: 25-01-2016
DOI: 10.3390/EN9020069
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2012
Publisher: Institution of Engineering and Technology (IET)
Date: 2011
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2018
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 17-02-2016
Publisher: Elsevier BV
Date: 2015
Publisher: IEEE
Date: 09-03-2022
Publisher: Elsevier BV
Date: 11-2019
Publisher: IEEE
Date: 06-2016
Publisher: IEEE
Date: 06-2016
Publisher: IEEE
Date: 06-2017
Publisher: IEEE
Date: 06-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2011
Publisher: IEEE
Date: 10-2014
Publisher: Elsevier BV
Date: 02-2023
Publisher: Elsevier BV
Date: 02-2019
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2023
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2018
Publisher: Springer International Publishing
Date: 16-10-2018
Publisher: Elsevier BV
Date: 2022
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2018
Publisher: IEEE
Date: 11-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Publisher: IEEE
Date: 06-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2020
Publisher: MDPI AG
Date: 28-09-2018
DOI: 10.3390/EN11102589
Abstract: With the increasing interaction between physical devices and communication components, the substation based on the IEC 61850 standard is a type of cyber–physical system. This paper proposes a reliability analysis method for substations with a cyber–physical interface matrix (CPIM). This method calculates the influences from both the physical device failures and the communication devices failures. Two indices, Probability of Load Curtailments and Expected Demand Not Supplied, are used in the reliability analysis. Given the simplified model of the practical substation based on the Chinese IEC 61850 standard, the results show that the substation system had a potential risk of cascading failure under the cyber–physical fusion trend, as the failure in cyber layer would increase the power loss of the whole system. The changing magnitude of Expected Demand Not Supplied increased significantly with increasing transmission delay rate of the process bus.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2020
Publisher: IEEE
Date: 10-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2020
Publisher: IEEE
Date: 10-2014
Publisher: IEEE
Date: 10-2018
Publisher: MDPI AG
Date: 18-01-2017
DOI: 10.3390/EN10010112
Publisher: MDPI AG
Date: 18-01-2020
DOI: 10.3390/EN13020473
Abstract: This study analyzes and evaluates the feasibility of a harmonic suppression traction transformer (HSTT) for harmonic reduction in railway systems. This new type of transformer can improve the power quality of railway systems by preventing high-frequency harmonic currents from injecting into the traction grid. As the physical size of available space in high-speed trains is strictly limited, low space-occupying filtering techniques are needed. Therefore, an HSTT with integrated filtering inductors (IFIs) capable of being implemented in regular trains is proposed. Taking advantage of the HSTT, a specially constructed inductive-capacitive-inductive (LCL)-type filter is used for harmonic suppression instead of a regular LCL-type filter. The proposed filter is composed of an integrated inductor, leakage inductor of the traction transformer, and an external filter capacitor. In this paper, we analyze the topology of the proposed system, construct a mathematical model to reveal the magnetic decoupling theory of IFIs, and discuss the design and calculation procedures of the HSTT with IFIs. The field circuit coupling simulation of the HSTT with IFIs is performed to validate the effectiveness of the proposed system. Finally, the practical operation based on a 10 kVA prototype shows that the proposed scheme can not only suppress the high-order frequency harmonics but also decrease the installed space of filter devices.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2022
Publisher: IEEE
Date: 12-2019
Publisher: IOP Publishing
Date: 02-2021
DOI: 10.1088/1742-6596/1754/1/012029
Abstract: The power injection from the high-voltage direct current (HVDC) transmission system has a significant impact on the operation and scheduling of the receiving-end power system. In this paper, considering the unipolar blocking faults and the power characteristics of the traditional HVDC system (i.e., LCC-HVDC), a multi-period dispatch model is proposed for the receiving-end power system to achieve the coordinated optimization of various dispatchable resources such as the power injection of LCC-HVDC and the local generation. In the proposed model, the constraints such as those related to the number of LCC-HVDC power adjustments, branch power flow, bus voltage and the output of local generators are taken into account, and its objective is to minimize the total power purchase cost of the receiving-end power system. To solve the proposed model efficiently, the method for determining the time of changing LCC-HVDC power injection is first proposed, and then its results are used to further solve the proposed multi-period dispatch model of the receiving-end power system. The simulation results show that the dispatch method proposed in this paper can effectively deal with LCC-HVDC unipolar blocking faults, and reasonably optimize the power purchase cost of the receiving-end power system.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2013
Publisher: IEEE
Date: 2010
Publisher: The Scientific and Technological Research Council of Turkey (TUBITAK-ULAKBIM) - DIGITAL COMMONS JOURNALS
Date: 2015
DOI: 10.3906/ELK-1304-195
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2018
Publisher: Elsevier BV
Date: 02-2012
Publisher: IEEE
Date: 2010
Publisher: IEEE
Date: 10-2014
Publisher: IEEE
Date: 11-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2012
Publisher: MDPI AG
Date: 14-02-2022
DOI: 10.3390/EN15041362
Abstract: To improve the coordination and complementarity of multiple energy sources, balancing the interests of different participants in a multi-energy system is of great importance. However, traditional centralized optimization can hardly reflect the game relationship between supply side and demand sides. A trading model based on the Stackelberg game model is proposed in this paper to balance the interests of the supply side and demand side and reduce the carbon emissions. First of all, the process of trading between the supply side and demand side based on smart contracts is described. A contractual consensus is obtained through an internal game, and the transaction is completed automatically. Secondly, a bilevel optimization model is established to coordinate the benefits of both parties based on the Stackelberg game model. The energy operator acts as a leader, and considers the two objectives, i.e., maximizing net income and minimizing carbon emissions, and uses the linear weighting method to convert the dual objectives into single objective. Users act as followers and aim to increase the comprehensive benefits, including energy cost and comfort. Then, Karush–Kuhn–Tucker optimality condition is used to transform the bilevel optimization model into an equivalent single-level model. Finally, simulation results show that the proposed method can coordinate the economic interests of both sides of supply and demand and effectively reduce the carbon emissions of the energy operator.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2020
Publisher: IEEE
Date: 09-2018
Publisher: IEEE
Date: 07-2017
Publisher: Journal of Modern Power Systems and Clean Energy
Date: 2021
Publisher: IEEE
Date: 12-2019
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 02-2017
Publisher: Institution of Engineering and Technology (IET)
Date: 29-03-2017
Publisher: Elsevier BV
Date: 12-2017
DOI: 10.1016/J.JSTROKECEREBROVASDIS.2017.07.008
Abstract: Exercise has established benefits following stroke. We aimed to describe self-reported exercise 5 and 10 years after stroke, change in exercise over time, and to identify factors associated with long-term exercise. Data on exercise (defined as 20 minutes' duration, causing sweating and increased heart rate) were obtained by questionnaire from a population-based stroke incidence study with 10-year follow-up. For change in exercise between 5 and 10 years (n = 276), we created 4 categories of exercise (no exercise, ceased exercising, commenced exercising, continued exercising). Multinomial regression determined associations between exercise categories and exercising before stroke, receiving exercise advice and functional ability and demographic factors. The prevalence of exercise at 5 years (n = 520) was 18.5% (n = 96) (mean age 74.7 [standard deviation {SD} 14] years, 50.6% male) and 24% (n = 78) at 10 years. In those with data at both 5 and 10 years (mean age 69 [standard deviation 14] years, 52.9% male), 15% (n = 42) continued exercising, 10% (n = 27) commenced exercising, 14% (n = 38) ceased exercising, and 61% (n = 169) reported no exercise. Continued exercise was associated with younger age (relative risk [RR] .47 95% confidence interval [CI] .25-0.89), greater Barthel score (RR 2.97 95% CI 1.00-8.86), independent walking (RR 2.32 95% CI 1.16-4.68), better quality of life (RR 10.9 95% CI 2.26-52.8), exercising before stroke (RR 16.0 95%CI 4.98-51.5), and receiving advice to exercise (RR 2.99 95% CI 1.73-5.16). Few people exercise after stroke and fewer commence exercise long term. Innovative interventions to promote and maintain exercise are required after stroke.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2021
Publisher: Springer Science and Business Media LLC
Date: 13-12-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Publisher: IEEE
Date: 06-2015
Publisher: IEEE
Date: 11-2017
Publisher: IEEE
Date: 11-2018
Publisher: Elsevier BV
Date: 07-2017
Publisher: Wiley
Date: 10-05-2017
DOI: 10.1111/ENE.13306
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2020
Publisher: Frontiers Media SA
Date: 18-11-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2022
Publisher: S. Karger AG
Date: 2017
DOI: 10.1159/000479518
Abstract: b i Background: /i /b The burden of stroke in low- and middle-income countries (LMICs) is large and increasing, challenging the already stretched health-care services. b i Aims and Objectives: /i /b To determine the quality of existing stroke-care services in LMICs and to highlight indigenous, inexpensive, evidence-based implementable strategies being used in stroke-care. b i Methods: /i /b A detailed literature search was undertaken using PubMed and Google scholar from January 1966 to October 2015 using a range of search terms. Of 921 publications, 373 papers were shortlisted and 31 articles on existing stroke-services were included. b i Results: /i /b We identified efficient models of ambulance transport and pre-notification. Stroke Units (SU) are available in some countries, but are relatively sparse and mostly provided by the private sector. Very few patients were thrombolysed this could be increased with telemedicine and governmental subsidies. Adherence to secondary preventive drugs is affected by limited availability and affordability, emphasizing the importance of primary prevention. Training of paramedics, care-givers and nurses in post-stroke care is feasible. b i Conclusion: /i /b In this systematic review, we found several reports on evidence-based implementable stroke services in LMICs. Some strategies are economic, feasible and reproducible but remain untested. Data on their outcomes and sustainability is limited. Further research on implementation of locally and regionally adapted stroke-services and cost-effective secondary prevention programs should be a priority.
Publisher: Institution of Engineering and Technology (IET)
Date: 2011
Publisher: Elsevier BV
Date: 04-2018
Publisher: Elsevier BV
Date: 04-2010
Abstract: Coffee consumption has been associated with a lower risk of diabetes, but little is known about the mechanisms responsible for this association, especially related to the time when coffee is consumed. We examined the long-term effect of coffee, globally and according to the accompanying meal, and of tea, chicory, and caffeine on type 2 diabetes risk. This was a prospective cohort study including 69,532 French women, aged 41-72 y from the E3N/EPIC (Etude Epidémiologique auprès de Femmes de la Mutuelle Générale de l'Education Nationale/European Prospective Investigation into Cancer and Nutrition) cohort study, without diabetes at baseline. Food and drink intakes per meal were assessed by using a validated diet-history questionnaire in 1993-1995. During a mean follow-up of 11 y, 1415 new cases of diabetes were identified. In multivariable Cox regression models, the hazard ratio in the highest category of coffee consumption [> or =3 cups (375 mL)/d] was 0.73 (95% CI: 0.61, 0.87 P for trend 1.1 cup (125 mL)/meal with no intake. At lunchtime, this inverse association was observed for both regular and decaffeinated coffee and for filtered and black coffee, with no effect of sweetening. Total caffeine intake was also associated with a statistically significantly lower risk of diabetes. Neither tea nor chicory consumption was associated with diabetes risk. Our data support an inverse association between coffee consumption and diabetes and suggest that the time of drinking coffee plays a distinct role in glucose metabolism.
Publisher: IEEE
Date: 06-2015
Publisher: IEEE
Date: 11-2019
Publisher: IEEE
Date: 10-2006
Publisher: Elsevier BV
Date: 11-2020
Publisher: Elsevier BV
Date: 10-2020
Publisher: IEEE
Date: 10-2014
Publisher: IEEE
Date: 08-10-2022
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2020
Publisher: IEEE
Date: 11-2017
Publisher: IEEE
Date: 2010
Publisher: IEEE
Date: 08-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2023
Publisher: Institution of Engineering and Technology (IET)
Date: 05-2016
Publisher: Institution of Engineering and Technology (IET)
Date: 29-12-2022
DOI: 10.1049/ELP2.12287
Abstract: Once the short circuit damage accident of a large capacity 500 kV transformer occurs suddenly, it will seriously affect the safe operation of the power grid. The article expounds on the calculation principle and evaluation method of the transformer's ability to withstand short circuit, then introduces the design structure of 400 MVA/500 kV short circuit autotransformer and calculates the electromagnetic force and evaluates the ability to withstand short circuit under high voltage ‐ medium voltage (HV‐MV) and medium voltage ‐ low voltage (MV‐LV) conditions. By comparing with typical 110 kV and 220 kV transformers, the short‐circuit characteristics are analysed, the control strategy is proposed, and the largest capacity short circuit prototype with 400 MVA/500 kV autotransformer is developed. Last, the sudden short circuit test is carried out in the large current test centre. The results show that the large capacity autotransformer passed the big current impulse under HV‐MV and MV‐LV short circuit conditions for the first time in the world, and all indicators are good, which confirms the accuracy of the strength check and the effectiveness of the short circuit evaluation method and also proves that the 500 kV autotransformer has strong strength to withstand short circuits.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2020
Publisher: IEEE
Date: 03-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2008
Publisher: IEEE
Date: 10-2014
Publisher: Elsevier BV
Date: 2023
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2023
Publisher: IEEE
Date: 07-2014
Publisher: Elsevier BV
Date: 2022
Publisher: Institution of Engineering and Technology (IET)
Date: 17-01-2019
Publisher: Elsevier BV
Date: 09-2014
DOI: 10.1016/J.CMPB.2013.12.019
Abstract: Motor adaptation to novel force fields is considered as a key mechanism not only for the understanding of skills learning in healthy subjects but also for rehabilitation of neurological subjects. Several studies conducted over the last two decades used active robotic manipulanda to generate force fields capable of perturbing the baseline trajectories of both healthy and impaired subjects. Recent studies showed how motor adaptation to novel force fields can be induced also via virtual environments, whereas the effects of the force are projected onto a virtual hand, while the real hand remains constrained within a channel. This has great potentials of being translated into passive devices, rather than robotic ones, with clear benefits in terms of costs and availability of the devices. However, passive devices and virtual environments have received much less attention at least with regard to motor adaptation. This paper investigates the effects of both the real and virtual stiffness on motor adaptation. In particular, we tested 20 healthy subjects under two different real stiffness conditions (Stiff Channel vs Compliant Channel) and two different virtual conditions (Viscous vs Springy). Our main finding is that compliance of the channel favours a better adaptation featured with less lateral errors and longer retention of the after-effect. We posit that the physical compliance of the channel induces a proprioceptive feedback which is otherwise absent in a stiff condition.
Publisher: IEEE
Date: 10-2019
Publisher: Institution of Engineering and Technology (IET)
Date: 11-2018
Publisher: IOP Publishing
Date: 05-11-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2018
Publisher: IEEE
Date: 06-2016
Publisher: IOP Publishing
Date: 03-2021
DOI: 10.1088/1755-1315/701/1/012006
Abstract: The problem of suppression of nonlinear random impulse disturbance in grid-connected wind power generation is studied in this paper. The mathematical model of grid side converter of wind power system is obtained by using Kirchhoff law. A feedback synchronization controller is designed to suppress the disturbance of current. With the help of Lyapunov stability theory, the effectiveness of the synchronization controller is verified. Further effectively restrain the nonlinear random disturbance caused by the current connected to the grid, so that the current generated by the wind turbine is synchronized with the current generated by the power grid. Finally, the simulation verification is carried out. The simulation results show that the effectiveness of the proposed control method.
Publisher: Elsevier BV
Date: 05-2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2021
Publisher: IEEE
Date: 10-2006
Publisher: IEEE
Date: 05-2015
Publisher: IEEE
Date: 05-2018
Publisher: Wiley
Date: 28-08-2018
DOI: 10.1002/ETC.4213
Publisher: MDPI AG
Date: 11-03-2020
DOI: 10.3390/EN13061298
Abstract: As one of the core technologies of distributed feeder automation (DFA), line current differential protection (LCDP) can locate faults quickly and accurately and have the ability to cope with multi-directional flow. However, LCDP algorithm has high requirements for communication speed, and is sensitive to communication quality. In order to apply the LCDP algorithm to a real project, the communication system and its impacts on LCDP need to be studied in depth. In this paper, the design method of a communication system for LCDP, including communication mode, topology, communication protocol, and synchronization, is analyzed in detail. For better parameter determination, the communication models are investigated, and the impact of time delay, data loss, and jitter on LCDP are discussed. Further, the distribution network based on a real project is built in a cyber-physical co-simulation environment, and the impact of electrical fails and communication fails on LCDP are studied. The results show that the design method and parameters determination method proposed in this paper are effective.
Publisher: IEEE
Date: 26-03-2021
Publisher: IEEE
Date: 05-2018
Publisher: IEEE
Date: 10-2014
No related grants have been discovered for Domenico Campolo.