一种单相并联有源滤波器单周控制策略

为很好地解决畸变电流检测中的快速实时响应问题,在研究有源电力滤波器的单周控制原理与控制策略基础上,对单相并联型有源电力滤波器提出了一种新的控制模型。应用单周控制法控制有源电力滤波器可避免复杂的畸变电流检测过程和复杂的控制电路,而把畸变电流的检测与滤波器的控制过程结合在一起同时完成,故而实时性好和控制电路简单。仿真结果表明,该法简单、控制精度高、动态特性好。

Study of the Model with One-cycle Control Strategy for Single-phase Shunt Active Power Filter and Its Simulation

Recently, power quality has been recognized that among many types of harmonics that can appear in power systems. Different options are possible to use in order to reduce the risk coming from harmonics and several devices have been proposed to alleviate the problem, among which the active power filters (APFs) is shown to be very promising. The control strategy of an active power filer influences directly the performance of the active power filter. So the research on control method and strategy of an active power filter is widely paid attention. One-cycle control is a modulation and control technique put forward in 1991. It has been widely used in various kinds of inverters and active power filters because it possesses the distinguishing feature of higher control precision, better dynamic follow performance and simpler control circuit. In this paper, the method of one-cycle control applied to active power filter for single-phase system is researched. There are some advantages for active power filter with one-cycle control such as not to be needed harmonic detection, have simple control circuit and have good real time property. A new one-cycle control model of shunt active power filter is presented in this paper. The mathematic model of controller is built through the analysis of main circuit. The control model for single-phase APF with one-cycle control is simulated using Matlab/simulink and simpowersisyem based on theoretical analysis. The results show that the proposed control scheme is correct and feasible.