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Harmonic Measurement and Analysis during Electric Vehicle Charging

Engineering（科研） 2013年第1期5卷 215-220页

作者： MohdZamriChe Wanik Mohd FadzilMohd Siam Afida Ayob Subi yanto Azah Mohamed Abu HanifahAzit Saharuddin Sulaiman Mohamed Azrin Mohamed Ali Zahrul Faizi Hussein Ahmad Kamil MatHussin malaysian Green Technology Corporation Bandar BaruBangi Malaysia Power System Research Group UniversitiKebangsaan Malaysia Malaysia tnb distribution malaysia Malaysia tnb Research malaysia Malaysia

This paper presentsand describes harmonic measurement and analysis of studying harmonic propagation during electric vehicle (EV) charging. The measurement study is performed on a golf cart and two modern type of EVs. Harmonics from a single EV charging and a group of EV charging was measured. The voltage and current waveform during the charging was captured and analyzed to investigate the harmonic components that exist in the electrical system. Total current harmonic distortion (THDi) and total voltage harmonic distortion (THDi) were both calculated. Modern electric vehicles are found to release low THDi but higher THDv compared to a golf cart. On the measurement study during charging of? a group of EV, it is found that the summation of THD is not linear with a number of vehicles. The finding of the study reveals that harmonic contamination from EV charging on electrical grid is not as critical as thought by most of power system researchers and engineers.

关键词： Electric Vehicle Total Harmonic Distortion Electric Vehicle Charging Harmonic Power Quality

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Coordinated Voltage Control in distribution Network with Renewable Energy based Distributed Generation

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Engineering（科研） 2013年第1期5卷 208-214页

作者： Mohd Khairun Nizam Mohd Sarmin Worawat Nakawiro MohdZamriChe Wanik Mohd FadzilMohd Siam ZahrulFaizi Hussien Ahmad Asrul Ibrahim Ahmad Kamil Mat Hussin Green Technology Section TNB Research Malaysia Malaysia Power system research group UniversitiKebangsaan Malaysia Malaysia Smart Grid Section TNB Research Malaysia Malaysia

This paper presentsa voltage control strategy for power distribution systems with interconnected renewable energy based distributed generators (DGs). The control strategy coordinating conventional voltage control devices and reactive power from DG.A mixed-integer nonlinear programming problem was formulated and solved by particle swarm optimization (PSO). The code is written using DigSILENT programming language (DPL) and implemented inside DigSILENT power factory simulation software. All system constraints and operating limits are considered. The optimal power flow based approach can incorporate various uncertainties such as intermittent power characteristics and varying load demand. The proposed method is tested using real distribution network to demonstrate its effectiveness. The merits of the proposed method over the classical local-based control are presented in the simulation results. It is demonstrated that the proposed method is capable of keeping the system voltage within operating limit. Power losses is at the same time is minimized in comparison to the losses using conventional method.

关键词： Photovoltaic Distributed Generation Particle Swarm Optimisation DigSILENT Coordinated Control

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