Modified PWM with indirect current control technique applied to a single-phase shunt active power filter topology

S. Rahmani, K. Al-haddad, F. Fnaiech, P. Agarwal
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引用次数: 4

Abstract

This paper presents and analyses a new indirect current control technique applied to single-phase shunt active power filter (SPSAPF) implemented with pulse width modulation (PWM) based on two comparisons to compensate harmonics and reactive power of a non-linear load. This method uses a residual signal constructed from the comparison between the supply current and the desired value. To evaluate its performance, we have compared it with the direct current control technique based on the classic demodulation. The PWM control technique adopted is based on two comparisons of a triangular high frequency carrier signal and the source harmonic current. This harmonic signal namely +v and its opposite value -v are used, at the same instant, in the comparison process to generate the gate signals for the semi-conductor devices. By using the averaging technique, the direct consequence of using this PWM technique is that the transfer function of the SPSAPF becomes a pure gain. Simulation results using power system blockset Toolbox PSB of Matlab show the performance of the new control algorithm for SPSAPF implemented with the PWM adopted and its capability to compensate harmonics and reactive power.
基于间接电流控制技术的改进PWM应用于单相并联有源滤波器拓扑结构
本文提出并分析了一种新的间接电流控制技术,该技术应用于采用脉宽调制(PWM)的单相并联有源电力滤波器(SPSAPF),通过两种比较来补偿非线性负载的谐波和无功功率。该方法使用从电源电流和期望值之间的比较中构造的剩余信号。为了评价其性能,我们将其与基于经典解调的直流控制技术进行了比较。所采用的PWM控制技术是基于三角高频载波信号和源谐波电流的两次比较。这个谐波信号,即+v和它的相反值-v,在同一时刻,在比较过程中被用来产生半导体器件的门信号。通过使用平均技术,使用这种PWM技术的直接后果是SPSAPF的传递函数变成了一个纯增益。利用Matlab的电力系统块集工具箱PSB进行仿真,结果表明,采用PWM实现的SPSAPF控制算法具有良好的性能和谐波和无功补偿能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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