ORCID Profile
0000-0003-3785-1573
Current Organisation
Universiti Putra Malaysia
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Publisher: Elsevier BV
Date: 02-2018
Publisher: Elsevier BV
Date: 2013
Publisher: Hindawi Limited
Date: 2015
DOI: 10.1155/2015/452740
Abstract: To enhance the performance of stand-alone battery based system and to achieve the continuous power transmission, the behavior of multidirectional matrix converter (MDMC) has been analyzed in different operation modes. A systematic method interfacing a renewable source, a storage battery, and a load is proposed for a stand-alone battery based power system (SABBPS) to utilize the MDMC as PWM converter, inverter, or PWM converter and inverter in different operation modes. In this study, the Extended Direct Duty Pulse Width Modulation (EDDPWM) technique has been applied to control the power flow path between the renewable source, load, and the battery. Corresponding to generator voltage, input frequency, and loads demands, several operating states and control strategies are possible. Therefore, the boundaries and distribution of operation modes are discussed and illustrated to improve the system performance. The mathematical equation of the EDDPWM under different operation modes has been derived to achieve the maximum voltage ratio in each mode. The theoretical and modulation concepts presented have been verified in simulation using MATLAB and experimental testing. Moreover, the THD, ripple, and power flow direction have been analyzed for output current to investigate the behavior of system in each operation mode.
Publisher: Hindawi Limited
Date: 2014
DOI: 10.1155/2014/645734
Abstract: This study presents a new modulation method for multidirectional matrix converter (MDMC), based on the direct duty ratio pulse width modulation (DDPWM). In this study, a new structure of MDMC has been proposed to control the power flow direction through the stand-alone battery based system and hybrid vehicle. The modulation method acts based on the average voltage over one switching period concept. Therefore, in order to determine the duty ratio for each switch, the instantaneous input voltages are captured and compared with triangular waveform continuously. By selecting the proper switching pattern and changing the slope of the carriers, the sinusoidal input current can be synthesized with high power factor and desired output voltage. The proposed system increases the discharging time of the battery by injecting the power to the system from the generator and battery at the same time. Thus, it makes the battery life longer and saves more energy. This paper also derived necessary equation for proposed modulation method as well as detail of analysis and modulation algorithm. The theoretical and modulation concepts presented have been verified in MATLAB simulation.
Publisher: Trans Tech Publications, Ltd.
Date: 06-2014
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMM.564.747
Abstract: Malaysian industries, in general consider energy management a burden and non-profitable. Energy management initiatives are also viewed as a Cost-Centre. An Excel spreadsheet was therefore tailor-designed, which meets the requirements of the plant for energy optimization and management. The spreadsheet is grouped to reflect four parts, namely: plan, do, check and commit. This Plan-Do-Check-Commit cycle is based on the plan-do-check-act (PDCA) cycle. This spreadsheet has been developed with the objective of developing a tool that would be comprehensive, simple and flexible, open to be modified and tailored for the industries. The results indicated that there are opportunities for a more effective and structured approach to energy management in industry. An initial reduction of 5% in energy consumption has been recorded and it is the company’s responsibility to ensure that their energy management becomes part of their corporate culture.
No related grants have been discovered for Mohd Amran Mohd Radzi.