CPS-SPWM在级联型有源电力滤波器中的应用

提出了基于载波相移-正弦脉宽调制(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桥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.文中给出了载波相移技术在级联H桥型变流器上的具体实现方法,并将其应用在并联型有源电力滤波器(APF)中,对直流侧总电压闭环电压控制的原理进行了验证.仿真和实验结果表明,该并联型APF系统在低开关频率情况下能够准确有效地补偿谐波和无功电流,性能良好.

Carrier Phase Shifted SPWM and Its Applications in Shunt APF

Cascade H-bridge converter with carrier phase shifted sinusoidal pulse-width modulation (CPS-SPWM) technique is proposed. For a combination of cascade H-bridge topological structure and CPS-SPWM technique, this type of converter possesses the both merits and a good application prospect in the large power converter domain. This paper gives the implementation of Cascade H bridge converter with CPS-SPWM, and applies it in shunt active power filter (APF). Furthermore, the closed-loop control principle of DC side voltage is verified. Simulated and experimental results show good performances of the proposed APF, which can compensate the harmonic and reactive current correctly and validly under low switching frequency conditions.