Improved shunt active power filters

K. Sozański
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引用次数: 12

Abstract

This paper describes a shunt active power filters (APF) with improved dynamic performance. When the value of load current changes rapidly, the APF transient response is too slow, the line current suffers from dynamic distortion. This distortion causes an increase of harmonic content in the line current, which is dependent on a time constant. The APF control current dynamics is dependent on the inverter output time constant consisting of APF output inductance and resultant impedance of load and mains. In the proposed circuit transient performance of APF is improved using non-causal predictive current compensation. In the second solution modified output inverter is used. According to this modification the APF dynamics are improved. The Matlab simulation results of the modified APF are also presented in the paper. As an example a control circuit for a three-phase 75 kVA parallel active power filter (APF) is used.
改进的并联有源电源滤波器
介绍了一种具有改进动态性能的并联型有源电力滤波器(APF)。当负载电流值变化较快时,有源滤波器的瞬态响应太慢,线路电流存在动态畸变。这种失真导致线路电流中谐波含量的增加,这取决于时间常数。有源滤波器控制电流动态取决于逆变器输出时间常数,该时间常数由有源滤波器输出电感以及负载和市电的合成阻抗组成。在该电路中,采用非因果预测电流补偿改善了有源滤波器的暂态性能。在第二种解决方案中,使用改进的输出逆变器。在此基础上改进了有源滤波器的动力学特性。文中还给出了改进后的有源滤波器的Matlab仿真结果。以三相75kva并联有源电力滤波器(APF)的控制电路为例。
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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