由于并联型有源电力滤波器(SAPF)带宽限制等因素的影响,在弱电网下其对容性非线性负载发出的谐波电流的补偿效果较差.在此提出基于误差评价的谐波指令修正方法.该方法评价谐波电流指令与SAPF输出电流之间的幅值和相位误差,据此动态调整送给SAPF电流闭环子系统的谐波指令,从而等价提高了SAPF的带宽,改善了谐波补偿效果.仿真和实验结果证明了该方法的有效性.%The compensation effect of shunt active power filter(APF) on capacitive nonlinear load in weak grid is unsatisfactory due to the limitation of the APF bandwidth.A correction method of harmonic current command for improving the bandwidth is proposed.This method adjusts the harmonic command dynamically according to the magnitude and phase errors between the detected harmonic current and the output harmonic current of the APF,then sends the command to the current closed-loop subsystem for the current tracking.This in turn improves the bandwidth of the APF and ensures a better compensation performance.The improvement is verified by a series of simulations and experiments.
展开▼
