无源滤波器的一种实用改进方法

摘要

为了解决电力系统非线性负载的增多,导致谐波污染日益严重的问题,对目前国内外电力系统广泛采用的无源滤波器的原理及缺陷进行了研究.通过实验进行了效果比较,结果表明,在系统等效阻抗较小的情况下,工程实用的无源滤波器的效果较差.在不影响电网正常运行的前提下,用串联电抗器的方法来增大系统阻抗,可以有效地改善无源滤波器的滤波效果.%In order to address the increased power system nonlinear loads which often result in growing harmonic pollution, this paper studies the working principles and shortcomings of the passive filter which is widely adopted both at home and abroad. Comparisons of the effects by experiment shows that the performance of the passive filer used in the practical project is not satisfactory when the equivalent impedance of the system is small. Under the premise that the normal operation of the power grid is not affected, increasing the system impedance through series reactor can improve the performance of the passive filter efficiently.