有源电力滤波器(APF)滤波特性仿真结果的研究

在电力系统三相负荷不对称、控制器参数不精确及系统负荷突然变动的条件下，对有源电力滤波器的滤波效果进行了仿真研究．采用一阶预测算法计算出逆变器的理想输出电压，对逆变器各桥臂上的开关元件采用提出的新型脉宽调制（ Ｐ Ｗ Ｍ） 控制．结果表明：有源电力滤波器对严重畸变的电源电流具有良好的补偿；当滤波器交流侧的电感与参与滤波器理想输出电压计算的电感稍有不同时，滤波器仍有较好的补偿效果，补偿后的系统电流总畸变率小；对电力系统中的波动，快速变化的负荷，有源电力滤波器能够进行动态补偿

Study on Simulation and Analysis of APF Parameters

In order to get the hang of the effect of active filter under the conditions of asymetric 3-phase load,inaccurate controller parameters and abrupt change of system load,this article presents simulation research on it.Switch components on each bridge of the active power filter (APF) are controlled by the new pulse-width modulation,which is presented in the article,with the ideal inverter output voltage calculated by single-order predicted method.The results show that the active power filter might compensate the seriously distorted current successfully.Even when the inductance of the filter's AC side differes a little from the ideal inductance,the compensation result was still very good.The current distortion after compensation was decreased.The active power filter can provide dynamic compensation to system fluctuations and fast variation of load.