级联型并联有源电力滤波器控制方法的研究

针对传统两电平拓扑结构的有源滤波器容量较低的缺点,本文提出了基于CPS—SPWM技术的级联H桥型多电平变流器,它是CPS—SPWM技术与级联H型变流器拓扑结构的结合,同时具备二者的优点,在大功率变流器领域具有很好的应用前景。本文对基于瞬时无功功率理论的谐波电流提取方法进行了详细的分析,该控制方法更为简单、有效;并对2级级联5电平的并联有源滤波器系统进行仿真,仿真结果表明该系统能够在较低的器件开关频率下实现较好补偿效果,证明了该方法的正确性和实用性。

Study on the Control Method of Carrier Phase-shifted Angle to Cascade APF

In this paper,cascade H-bridge converter with modified carrier phase-shifted SPWM technique has been proposed,which is the combination of cascade structure and CPS-SPWM technique.Analysis the harmonics based on reactive power theory.Simulation result proves that shunt APF system with cascade multilevel converter based on modified Carrier Phase Shifted PWM can achieve excellent compensation effect at much low switch frequency,and the correctness and practicability of this control method.