基于状态空间的电力有源滤波器控制策略

作者：谷雨，陈国柱 日期：2008-08-14/span> 浏览：3716 查看PDF文档

基于状态空间的电力有源滤波器控制策略

谷雨，陈国柱
（浙江大学 电气工程学院，浙江 杭州 310027）

摘要：基于状态空间法对通过LCL与电网连接的电力有源滤波器进行了建模，通过对LCL滤波器特性的分析，应用全状态反馈来抑制LCL滤波器的谐振。在建模基础上把电网影响引入观测器设计，研究了电网建模对状态估计效果的影响，并解决了电网对APF补偿输出造成的无功问题，给出了电网电压前馈的规律。最后的仿真结果证明了该设计的正确性。
关键词：电力有源滤波器；LCL滤波器；状态反馈；观测器；电压前馈
中图分类号：TM464文献标识码：A文章编号：1001-4551(2008)07-0076-04

Control strategy of active power filter based on state space
GU Yu, CHEN Guozhu
（College of Electrical Engineering, Zhejiang University, Hangzhou 310027,China）
Abstract: The active power filter(APF) connected to the grid through an LCL filter was modeled, multivariable full state feedback was introduced to guarantee the stability of inner loop when considering the characteristics of the LCL, and study of the performance of estimator when considering the influence of the grid was proposed. The rule of feedforward to eliminate the reactive power in compensation current by grid voltage was given. The simulation result validates the correction of the proposed control strategy.
Key words: active power filter(APF); LCLfilter; state feedback; estimator; voltage feedforward
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