【摘要】 在并联型有源电力滤波器(APF)的控制方法中,滞环控制方法响应速度快,受负载参数变化影响小,但开关频率不固定,直流侧电压的稳定性不好。空间电压矢量控制(SVPWM)方法直流电压利用率高,直流侧电压稳定性好,但是负载参数变化影响空间电压矢量控制性能。提出一种将空间电压矢量控制和定频滞环控制相结合的APF电流控制方法,分析了SVPWM控制、单相和三相定频滞环电流控制以及空间电压矢量和定频滞环复合控制方法。并使用PSCAD/EMTDC软件对所述控制方法作了仿真,仿真研究表明,所提出的复合控制方法可使APF具有良好的静态稳定性和动态响应速度。更多还原

【Abstract】 For the control methods of shunt APF (Active Power Filter),the hysteresis control has faster response and less influence of load parameter variation,but unfixed switching frequency and worse stability of DC voltage,while the SVPWM(Space Vector Pulse Width Modulation) control has higher DC voltage utilization ratio and better DC voltage stability,but more influence of load parameter variation on its performance. A hybrid method combining the space voltage vector control and the fixed frequency hysteresis control is used to control the output current of APF. The SVPWM control,the single-phase & three-phase fixed-frequency hysteresis control and the hybrid control are analyzed and simulated with PSCAD / EMTDC. Results show that the hybrid method has better static stability and quicker dynamic response.更多还原