厂矿消弧供电系统单相接地故障分析

Analysis of the factories and arc suppression single-phase grounding power system fault

随着现代电力电子技术和生产技术的迅猛发展,电力系统中出现了各种类型和容量的电力电子装置,致使电力系统谐波污染问题日益严重。混合型滤波系统能充分利用无源和有源滤波器两种补偿方式各自的优点,对谐波电流实现比较理想的补偿,已经成为国内外研究与应用的热点。本文首先分析了无源LC滤波器的滤波特性,就无源滤波器的参数变化对阻抗特性的影响以及无功补偿特性的影响方面进行了大量仿真。深入研究了有源滤波器的拓扑结构和控制方法,最后应用MATLAB软件建立了滤波器主电路和控制电路的仿真模型,对不同控制方式与策略进行了仿真与分析,验证混合型滤波系统的滤波效果。

With the rapid development of modern power electronic technology and manufacturing technology,various types and capacity of power electronic devices have been developed in power system. Hybrid filtering system can make full use of the advantages of two kinds of compensation methods of passive and active power filter,and it has become a hot spot of research and application at home and abroad.In this paper,the filtering characteristics of the passive LC filter are analyzed,and the influence of the parameters of the passive filter on the impedance characteristics and the effect of reactive power compensation are analyzed in this paper.Depth study of the topology and control method of active power filter,and finally the application of MATLAB software established simulation model of main circuit and a control circuit of the filter,simulation and analysis of different control strategies and methods,and verification of hybrid filtering system filtering effect.