一种新型串联混合有源滤波器及其控制技术研究

Research on a Novel Series Hybrid Active Power Filter and Its Control Technique

混合型有源电力滤波器是当前有源滤波器研究领域的一个重要方向。针对传统有源电力滤波器存在的问题,本文提出了一种新型的基于LC串联谐振的串联混合有源电力滤波器。考虑到传统有源滤波器谐波补偿性能与系统稳定性之间存在矛盾,设计时在电路主回路中引入了串联超前校正环节(PD控制器),并以此为基础,建立了系统的数学模型,对系统的频率特性和滤波特性进行了分析。仿真结果表明:该新型滤波器滤波性能好,控制方法简单,实用性高;校正环节使系统的相位裕度增大,稳定性提高,谐波补偿性能也得到改善。

Hybrid active power filter has received special attention in recent years. Aiming at the problems of the traditional active power filter （APF）,this paper investigates a novel series hybrid active power filter. Consisting of the contradiction between the harmonics compersation and the system stability,PD compensation is drawn into the main circuit of the configuration in the design. Based on the new control technique,the mathematical model is proposed,and the frequency and the filtering properties are analyzed. The simulation results show that the new APF has good filtering performance and simple control method. PD compensation makes the phase margin,system stability and the harmonics compensation performance be improved at the same time.