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2014年 第8卷 第2期

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《能源前沿(英文)》 >> 2014年 第8卷 第2期 doi: 10.1007/s11708-013-0284-4

Power quality improvement using fuzzy logic controller for five-level shunt active power filter under distorted voltage conditions

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1. Department of Electrical Engineering, University of Djelfa, B.P.3117, Djelfa 17000, Algeria.2. SE Laboratory, University of Biskra, B.P.145, Biskra 07000, Algeria.3. ARHYS Laboratory, University of Biskra, B.P.145, Biskra 07000, Algeria

发布日期 :2014-05-19

摘要

In this paper, a five-level inverter is used as a shunt active power filter (APF), taking advantages of the multilevel inverter such as low harmonic distortion and reduced switching losses. It is used to compensate reactive power and eliminate harmonics drawn from a thyristor rectifier feeding an inductive load (RL) under distorted voltage conditions. The APF control strategy is based on the use of self-tuning filters (STF) for reference current generation and a fuzzy logic current controller. The use of STF instead of classical extraction filters allows extracting directly the voltage and current fundamental components in the - axis without phase locked loop (PLL). The MATLAB fuzzy logic toolbox is used for implementing the fuzzy logic control algorithm. The obtained results show that the proposed shunt APF controller has produced a sinusoidal supply current with low harmonic distortion and in phase with the line voltage.

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active power filter (APF) ; harmonics isolator ; distorted voltage conditions ; self-tuning filters (STF) ; fuzzy logic control

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