ORCID Profile
0000-0002-5302-5338
Current Organisation
Northumbria University
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In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Renewable Power and Energy Systems Engineering (excl. Solar Cells) | Electrical and Electronic Engineering | Power and Energy Systems Engineering (excl. Renewable Power) | Industrial Electronics
Renewable Energy not elsewhere classified | Energy Transmission and Distribution (excl. Hydrogen) | Hydrogen Storage |
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2020
Publisher: IEEE
Date: 2020
Publisher: Institution of Engineering and Technology (IET)
Date: 27-11-2019
Publisher: Institution of Engineering and Technology (IET)
Date: 28-02-2020
Publisher: Elsevier BV
Date: 2011
Publisher: Elsevier BV
Date: 2022
Publisher: Elsevier BV
Date: 2011
Publisher: Elsevier BV
Date: 10-2023
Publisher: Elsevier BV
Date: 2024
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2014
Publisher: IEEE
Date: 08-2011
Publisher: Informa UK Limited
Date: 29-04-2016
Publisher: Walter de Gruyter GmbH
Date: 23-10-2013
Abstract: In stressed power systems with large induction machine component, there exist und ed electromechanical modes and unstable monotonic voltage modes. This article proposes a sequential design of an excitation controller and a power system stabiliser (PSS) to stabilise the system. The operating region, with induction machines in stressed power systems, is often not captured using a linearisation around an operating point, and to alleviate this situation a robust controller is designed which guarantees stable operation in a large region of operation. A minimax linear quadratic Gaussian design is used for the design of the supplementary control to automatic voltage regulators, and a classical PSS structure is used to d electromechanical oscillations. The novelty of this work is in proposing a method to capture the unmodelled nonlinear dynamics as uncertainty in the design of the robust controller. Tight bounds on the uncertainty are obtained using this method which enables high-performance controllers. An IEEE benchmark test system has been used to demonstrate the performance of the designed controller.
Publisher: IEEE
Date: 09-2014
Publisher: MDPI AG
Date: 05-01-2022
Abstract: Long-range (LoRa) communication has attracted much attention recently due to its utility for many Internet of Things applications. However, one of the key problems of LoRa technology is that it is vulnerable to noise/interference due to the use of only up-chirp signals during modulation. In this paper, to solve this problem, unlike the conventional LoRa modulation scheme, we propose a modulation scheme for LoRa communication based on joint up- and down-chirps. A fast Fourier transform (FFT)-based demodulation scheme is devised to detect modulated symbols. To further improve the demodulation performance, a hybrid demodulation scheme, comprised of FFT- and correlation-based demodulation, is also proposed. The performance of the proposed scheme is evaluated through extensive simulation results. Compared to the conventional LoRa modulation scheme, we show that the proposed scheme exhibits over 3 dB performance gain at a bit error rate of 10−4.
Publisher: IEEE
Date: 06-2013
Publisher: IEEE
Date: 11-2018
Publisher: Hindawi Limited
Date: 26-04-2014
DOI: 10.1002/ETEP.1739
Publisher: Elsevier BV
Date: 11-2022
Publisher: MDPI AG
Date: 18-10-2022
Abstract: The increasing prevalence of resistance in carbapenems is an escalating concern as carbapenems are reserved as last-line antibiotics. Although indiscriminate antibiotic usage is considered the primary cause for resistance development, increasing evidence revealed that inconsequential strains without any direct clinical relevance to carbapenem usage are harboring carbapenemase genes. This phenomenon indirectly implies that environmental microbial populations could be the ‘hidden vectors’ propelling carbapenem resistance. This work aims to explore the carbapenem-resistance profile of Vibrio species across erse settings. This review then proceeds to identify the different factors contributing to the dissemination of the resistance traits and defines the transmission pathways of carbapenem resistance. Deciphering the mechanisms for carbapenem resistance acquisition could help design better prevention strategies to curb the progression of antimicrobial resistance development. To better understand this vast reservoir selecting for carbapenem resistance in non-clinical settings, Vibrio species is also prospected as one of the potential indicator strains for carbapenem resistance in the environment.
Publisher: IEEE
Date: 11-2017
Publisher: Elsevier BV
Date: 12-2013
Publisher: IEEE
Date: 11-2011
Publisher: IEEE
Date: 10-2017
Publisher: Elsevier BV
Date: 07-2016
Publisher: IEEE
Date: 2013
Publisher: Elsevier BV
Date: 2017
Publisher: Elsevier BV
Date: 12-2017
Publisher: IEEE
Date: 10-2016
Publisher: IEEE
Date: 07-2014
Publisher: IEEE
Date: 12-2017
Publisher: IEEE
Date: 07-2017
Publisher: IEEE
Date: 16-12-2020
Publisher: IEEE
Date: 08-2018
Publisher: Elsevier BV
Date: 2011
Publisher: Institution of Engineering and Technology (IET)
Date: 25-10-2023
DOI: 10.1049/GTD2.13031
Publisher: Institution of Engineering and Technology (IET)
Date: 28-02-2020
Publisher: Elsevier BV
Date: 12-2023
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2021
Publisher: IEEE
Date: 09-2015
Publisher: IEEE
Date: 2013
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Publisher: IEEE
Date: 06-2013
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2020
Publisher: Elsevier BV
Date: 11-2022
Publisher: IEEE
Date: 10-2017
Publisher: IEEE
Date: 07-2017
Publisher: Elsevier BV
Date: 07-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2016
Publisher: IEEE
Date: 07-2016
Publisher: IEEE
Date: 07-2014
Publisher: Elsevier BV
Date: 12-2014
Publisher: Institution of Engineering and Technology (IET)
Date: 04-01-2021
DOI: 10.1049/GTD2.12110
Publisher: Elsevier BV
Date: 07-2018
Publisher: IEEE
Date: 02-02-2021
Publisher: IEEE
Date: 12-2017
Publisher: IEEE
Date: 08-2011
Publisher: IEEE
Date: 07-2015
Publisher: Elsevier BV
Date: 07-2020
Publisher: Informa UK Limited
Date: 14-12-2017
Publisher: IEEE
Date: 09-2016
Publisher: IEEE
Date: 07-2011
Publisher: IEEE
Date: 07-2011
Publisher: MDPI AG
Date: 24-04-2020
DOI: 10.3390/ELECTRONICS9040693
Abstract: Operational and planning modules of energy systems heavily depend on the information of the underlying topological and electric parameters, which are often kept in database within the operation centre. Therefore, these operational and planning modules are vulnerable to cyber anomalies due to accidental or deliberate changes in the power system database model. To validate, we have demonstrated the impact of cyber-anomalies on the database model used for operation of energy systems. To counter these cyber-anomalies, we have proposed a defence mechanism based on widely accepted classification techniques to identify the abnormal class of anomalies. In this study, we find that our proposed method based on multilayer perceptron (MLP), which is a special class of feedforward artificial neural network (ANN), outperforms other exiting techniques. The proposed method is validated using IEEE 33-bus and 24-bus reliability test system and analysed using ten different datasets to show the effectiveness of the proposed method in securing the Optimal Power Flow (OPF) module against data integrity anomalies. This paper highlights that the proposed machine learning-based anomaly detection technique successfully identifies the energy database manipulation at a high detection rate allowing only few false alarms.
Publisher: Elsevier BV
Date: 07-2017
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2014
Publisher: IEEE
Date: 09-2015
Publisher: IEEE
Date: 09-2019
Publisher: Elsevier BV
Date: 2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2019
Publisher: IEEE
Date: 2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Publisher: IEEE
Date: 09-2018
Publisher: IEEE
Date: 10-10-2021
Publisher: IEEE
Date: 07-2012
Publisher: Elsevier BV
Date: 2014
Publisher: IEEE
Date: 07-2016
Publisher: Elsevier BV
Date: 2014
Publisher: IEEE
Date: 10-2016
Publisher: IEEE
Date: 11-2018
Publisher: Elsevier BV
Date: 06-2014
Publisher: IEEE
Date: 08-2019
Publisher: IEEE
Date: 07-2011
Publisher: IEEE
Date: 07-2016
Publisher: IEEE
Date: 2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2018
Publisher: Institution of Engineering and Technology (IET)
Date: 12-02-2021
DOI: 10.1049/GTD2.12118
Publisher: IEEE
Date: 07-2014
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2014
Publisher: IEEE
Date: 07-2010
Publisher: MDPI AG
Date: 26-08-2019
DOI: 10.3390/ELECTRONICS8090940
Abstract: This paper aims to develop a new switched inductor assisted strong boost Z-source inverter (SL-SBZSI) topology with high voltage gain and analyze the steady-state characteristics of the proposed topology. In the proposed topology, two switched inductors are used within the series impedance structure of the Z-source inverter (ZSI) in order to achieve the high voltage gain. The steady-state characteristics of the proposed topology are analyzed to disseminate its several advantages as compared to traditional ZSIs. The key advantages include the higher boost factor with lower shoot-through duty ratio and lower voltage stresses on capacitors as well as on switches of the inverter bridge. Furthermore, the proposed topology has the soft-start ability which significantly reduces the inrush start-up current while comparing with the traditional ZSI. In the proposed topology, a common ground is shared between the output AC voltage and the input DC voltage source which categorizes this topology to the doubly grounded inverter. The characteristics of the proposed SL-SBZSI are analyzed by considering two operating condition where the simple boost pulse width modulation (PWM) scheme is used to extract the shoot-through pulses. The characteristics of the proposed topology are also compared with different existing topologies along with the conventional modified capacitor assisted Z-source inverter (MCA-ZSI), whose boost factor is much closer to the proposed topology. Rigorous mathematical analyses are presented to clearly demonstrate the benefits of the proposed topology while simulation studies are carried out to demonstrate its distinct features as compared to the existing topology. Finally, experimental studies are conducted to further validate the theoretical and simulation results.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 15-11-2020
Publisher: Elsevier BV
Date: 04-2022
DOI: 10.1016/J.ISATRA.2021.05.028
Abstract: This paper presents a voltage control mode (VCM)-based super-twisting algorithm-sliding mode controller (STA-SMC) and current control mode (CCM)-based STA-SMC for islanded and grid-connected operations of single-phase inverters interfaced with distributed energy resources (DERs), respectively. The external disturbances are modeled by considering the effects of load currents or load voltages depending on operational modes whiles parametric uncertainties are modeled based on their variations from nominal values. Therefore, the proposed controllers are robust against external disturbances, parametric uncertainties, and variations in loading conditions. Simulation studies are conducted in the MATLAB/Simulink platform for both single and multiple DERs which are interfaced through single-phase inverters to the main grid or loads. The results are also analyzed through comparative studies with different controllers and it is found that the proposed controllers perform better than existing controllers.
Publisher: Elsevier BV
Date: 12-2020
Publisher: Elsevier BV
Date: 12-2013
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2017
Publisher: IEEE
Date: 06-2017
Publisher: Elsevier BV
Date: 10-2012
Publisher: Elsevier BV
Date: 03-2018
Publisher: IEEE
Date: 12-2018
Publisher: IEEE
Date: 02-08-2020
Publisher: IEEE
Date: 12-2018
Publisher: IEEE
Date: 06-2013
Publisher: IEEE
Date: 11-2011
Publisher: Walter de Gruyter GmbH
Date: 04-2015
Abstract: This paper presents a new distributed agent-based scheme to enhance the transient stability of power systems by maintaining phase angle cohesiveness of interconnected generators through proper relay coordination with critical clearing time (CCT) information. In this distributed multi-agent infrastructure, intelligent agents represent various physical device models to provide dynamic information and energy flow among different physical processes of power systems. The agents can communicate with each other in a distributed manner with a final aim to control circuit breakers (CBs) with CCT information as this is the key issue for maintaining and enhancing the transient stability of power systems. The performance of the proposed scheme is evaluated on a standard IEEE 39-bus New England benchmark system under different large disturbances such as three-phase short-circuit faults and changes in loads within the systems. From the simulation results, it is found that the proposed scheme significantly enhances the transient stability of power systems as compared to a conventional scheme of static CB operation.
Publisher: IEEE
Date: 09-2015
Publisher: IEEE
Date: 08-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2014
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2016
Publisher: Elsevier BV
Date: 09-2022
Publisher: IEEE
Date: 08-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2012
Publisher: IEEE
Date: 09-2014
Publisher: Elsevier BV
Date: 2013
Publisher: IEEE
Date: 12-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2017
Publisher: Institution of Engineering and Technology (IET)
Date: 09-01-2022
DOI: 10.1049/GTD2.12384
Publisher: MDPI AG
Date: 07-01-2021
DOI: 10.3390/ELECTRONICS10020115
Abstract: The main purpose of developing microgrids (MGs) is to facilitate the integration of renewable energy sources (RESs) into the power grid. RESs are normally connected to the grid via power electronic inverters. As various types of RESs are increasingly being connected to the electrical power grid, power systems of the near future will have more inverter-based generators (IBGs) instead of synchronous machines. Since IBGs have significant differences in their characteristics compared to synchronous generators (SGs), particularly concerning their inertia and capability to provide reactive power, their impacts on the system dynamics are different compared to SGs. In particular, system stability analysis will require new approaches. As such, research is currently being conducted on the stability of power systems with the inclusion of IBGs. This review article is intended to be a preface to the Special Issue on Voltage Stability of Microgrids in Power Systems. It presents a comprehensive review of the literature on voltage stability of power systems with a relatively high percentage of IBGs in the generation mix of the system. As the research is developing rapidly in this field, it is understood that by the time that this article is published, and further in the future, there will be many more new developments in this area. Certainly, other articles in this special issue will highlight some other important aspects of the voltage stability of microgrids.
Publisher: IEEE
Date: 2020
Publisher: Informa UK Limited
Date: 02-10-2017
Publisher: IEEE
Date: 07-2015
Publisher: Elsevier BV
Date: 05-2015
Publisher: Elsevier BV
Date: 07-2023
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2020
Publisher: IEEE
Date: 07-2014
Publisher: MDPI AG
Date: 27-01-2018
DOI: 10.3390/EN11020296
Abstract: This paper aims to develop the generalized dynamical model of multiple photovoltaic (PV) units connected to the grid along with the dynamic interaction analysis among different PV units. The dynamical models of multiple PV units are developed by considering three different configurations through which these PV units are connected to the grid. These configurations include: (a) the direct connection of multiple PV units to the grid (b) the connection of multiple PV units to the grid through a point of common coupling (PCC) and (c) the connection of PV units without a PCC. The proposed modeling framework provides meaningful insights for analyzing dynamic interaction analysis where these interactions from other PV units are expressed in terms of voltages and line impedances rather than the dynamics of currents. The dynamic interactions among different PV units for all these configurations are analyzed using both analytical and simulation studies. Simulations are carried out on an IEEE 15-bus test system and dynamic interactions are analyzed from the total harmonic distortions (THDs) in the current responses of different PV units. Both analytical and simulation studies clearly indicate that the effects of dynamic interactions are prominent with the increase in PV units.
Publisher: IEEE
Date: 16-12-2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2019
Publisher: Springer Berlin Heidelberg
Date: 2012
Publisher: Springer Berlin Heidelberg
Date: 2012
Publisher: Institution of Engineering and Technology (IET)
Date: 22-11-2022
DOI: 10.1049/GTD2.12678
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2018
Publisher: IEEE
Date: 11-2016
Publisher: IEEE
Date: 08-2018
Publisher: MDPI AG
Date: 03-09-2018
DOI: 10.3390/ELECTRONICS7090175
Abstract: In this paper, partial feedback linearizing model predictive controllers are designed for grid-connected systems comprising multiple photovoltaic (PV) units where these units are connected through a point of common coupling (PCC). The proposed controllers are designed for voltage source inverters (VSIs) based on comprehensive dynamical models of grid-connected PV systems with the proposed topology. The proposed partial feedback linearization scheme decouples multiple PV units in the forms of several reduced-order subsystems and enables linear controller design through the linear continuous-time receding horizon model predictive control scheme. The proposed partial feedback linearization scheme also considers dynamic interactions among multiple PV units as external noises or disturbances and decouples these noises. This paper includes the noise decoupling capability of the partial feedback linearization for grid-connected PV systems with multiple PV units which are connected through a PCC. Simulation results clearly demonstrate the effectiveness of the proposed scheme under different operating conditions as compared to an existing proportional integral controller.
Publisher: IEEE
Date: 09-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2022
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2012
Publisher: Wiley
Date: 18-03-2014
Abstract: Four new cerium(III) formamidinate complexes comprising [Ce(p-TolForm)3 ], [Ce(DFForm)3 (thf)2 ], [Ce(DFForm)3 ], and [Ce(EtForm)3 ] were synthesized by protonolysis reactions using [Ce{N(SiMe3 )2 }3 ] and formamidines of varying functionality, namely N,N'-bis(4-methylphenyl)formamidine (p-TolFormH), N,N'-bis(2,6-difluorophenyl)formamidine (DFFormH), and the sterically more demanding N,N'-bis(2,6-diethylphenyl)formamidine (EtFormH). The bimetallic cerium lithium complex [LiCe(DFForm)4 ] was synthesized by treating a mixture of [Ce{N(SiHMe2 )2 }3 (thf)2 ] and [Li{N(SiHMe2 )2 }] with four equivalents of DFFormH in toluene. Oxidation of the trivalent cerium(III) formamidinate complexes by trityl chloride (Ph3 CCl) caused dramatic color changes, although the cerium(IV) species appeared transient and reformed cerium(III) complexes and N'-trityl-N,N'-diarylformamidines shortly after oxidation. The first structurally characterized homoleptic cerium(IV) formamidinate complex [Ce(p-TolForm)4 ] was obtained through a protonolysis reaction between [Ce{N(SiHMe2 )2 }4 ] and four equivalents of p-TolFormH. [Ce{N(SiHMe2 )2 }4 ] was also treated with DFFormH and EtFormH, but the resulting cerium(IV) complexes decomposed before isolation was possible. The new cerium(IV) silylamide complex [Ce{N(SiMe3 )2 }3 (bda)0.5 ]2 (bda=1,4-benzenediolato) was synthesized by treatment of [Ce{N(SiMe3 )2 }3 ] with half an equivalent of 1,4-benzoquinone, and showed remarkable resistance towards protonolysis or reduction.
Publisher: IEEE
Date: 07-2012
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2014
Publisher: IEEE
Date: 12-2018
Publisher: IEEE
Date: 06-2014
Publisher: Elsevier BV
Date: 2014
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2019
Publisher: IEEE
Date: 07-2015
Publisher: IEEE
Date: 07-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2014
Publisher: Elsevier BV
Date: 02-2020
Publisher: IEEE
Date: 08-2019
Publisher: IEEE
Date: 06-2016
Publisher: IEEE
Date: 09-2017
Publisher: IEEE
Date: 07-2014
Publisher: IEEE
Date: 09-2016
Publisher: Institution of Engineering and Technology (IET)
Date: 12-06-2018
Publisher: IEEE
Date: 10-2012
Location: United Kingdom of Great Britain and Northern Ireland
Start Date: 10-2022
End Date: 10-2027
Amount: $5,000,000.00
Funder: Australian Research Council
View Funded Activity