三电平并联型有源电力滤波器的无差拍控制研究

介绍了基于开关函数的三电平并联型有源电力滤波器工作原理,建立了该种有源电力滤波器的数学模型,并提出一种三电平并联型有源电力滤波器的无差拍控制方案。该方案采用ipiq法检测谐波电流,根据当前采样时刻得到的负载电流和补偿电流值预测出下一采样时刻的电流参考值,并计算出有源电力滤波器在下一个采样时刻的输出电压参考值,最后采用电压空间矢量算法得出桥臂开关信号,从而达到电流跟踪控制的目的。仿真结果表明,采用该方案的三电平并联型有源电力滤波器能够很好地对检测电流进行跟踪控制,有效抑制了谐波,且具有良好的动态响应效果。

Research of deadbeat control of three-level paralleling active power filter

Working principle of three-level paralleling active power filter based on switching function was introduced,mathematical model for the active power filter was established,and a deadbeat control scheme for the active power filter was proposed.In the scheme,ip-iq method is used to detect harmonic current,reference current at the next sampling time is forecasted by use of load current detected at current sampling time and compensated current,and output reference voltage of the active power filter at the next sampling time is calculated.Finally,switch signal of bridge is obtained by use of space voltage vector algorithm to track and control current.The simulation result showed that the three-level paralleling active power filter controlled by the scheme can track and control detected current perfectly,which restrains harmonic effectively and has good dynamic response.