Simulation Research on a SVPWM Control Algorithm for a Four-Leg Active Power Filter |
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Authors: | ZHOU Juan WU Xiao-jie GENG Yi-wen DAI Peng |
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Affiliation: | School of Information and Electrical Engineering, China University of Mining & Technology, Xuzhou, Jiangsu 221008, China |
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Abstract: | In this paper the topology of a four-leg shunt active-power filter (APF) is given.The APF compensates harmonic and reactive power in a three-phase four-wire system.The scheme adopted for control of the four-leg active power filter, a 3-Dimensional Pulse Width Modulation (PWM) technique, is presented.The theoretical deduction of a space vector PWM (SVPWM) algorithm is given in this paper.The paper also analyzes the distribution of the voltage-space vector of the four-leg converter in αβγ coordinates and describes methods to determine the location of the voltage-space vector and to calculate duration time.Finally, the algorithm is implemented in simulation; the results show that the total harmonic distortion (THD) of the three phase-current waveforms is reduced.The neutral wire current, after compensation, is about 0 A showing that the topology of the four-leg shunt APF is feasible and the proposed scheme is effective. |
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Keywords: | three-phase four-wire system shunt active power filter 3-Dimensional space vector PWM |
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