一种并联混合型电力滤波器控制策略  

Novel Control Strategy for Parallel Hybrid Power Filter

作　　者：李晖[1] 吴隆辉[1] 卓放[1] 王兆安[1] 

机构地区：[1]西安交通大学电气工程学院,西安710049

出　　处：《电力系统及其自动化学报》2009年第1期83-88,共6页Proceedings of the CSU-EPSA

摘　　要：针对由并联电容器与有源电力滤波器组成的混合补偿系统所存在的稳定性问题,对混合系统的电流检测方法做了稳定性分析,提出了一种检测负载电流加电网电压的新型控制策略,该策略通过检测电网侧的谐波电压发出相应的谐波电流,改变系统的谐波阻抗而使系统的稳定性得到改善。并分析了此控制策略对有源电力滤波器的容量影响。经过理论分析和实验验证,此控制策略可以有效提高混合补偿系统的稳定性。Aiming at instability of hybrid system composed of parallel capacitor and shunt active power filter （APF）, the stability of usual current detection method is analyzed. A new control strategy is proposed which detects not only nonlinear load current but also network voltage. Compensating current is produced by detecting both load current and network voltage. So system harmonic impedance is changed and system stability is improved. At the same time, the influence on capacity of APF is also evaluated. The proposed control strategy is effective to improve system stability verified by theory analyzing and experiments verifying.

关 键 词：有源电力滤波器 并联电容器 控制策略 稳定性分析 容量影响 

分 类 号：TM761[电气工程—电力系统及自动化]