混合型有源电力滤波器的复合电流控制策略  

A composite current control strategy for the hybrid active power filter

作　　者：田飞燕[1] 高云广[1,2] 宋建成[1] 郑丽君[1] 

机构地区：[1]太原理工大学矿用智能电器技术国家地方联合工程实验室,太原030024 [2]太原科技大学电子与信息工程学院,太原030024

出　　处：《电测与仪表》2018年第2期70-74,共5页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(U1510112);山西省科技重大专项(20131101029)

摘　　要：针对电网中非线性负载引起的谐波问题,提出了一种并联混合有源电力滤波器结构。基于此拓扑结构,建立了其数学模型,并设计了基于PI控制策略的电流控制器。针对传统PI控制方法补偿精度受带宽制约,补偿效果不理想的问题,提出了基于重复控制的电流双闭环控制方法,并设计了双闭环电流控制器。仿真和实验结果表明,该控制策略具有很高的稳态补偿精度,能够有效补偿由非线性负载引起的谐波电流。补偿后电网电流THD降低到5%以下,波形近似于正弦波。A shunt hybrid active power filter is proposed for the harmonic problem caused by nonlinear loads in power grid. Based on the topological structure,the mathematical model is established,and the current controller based on PI control strategy is designed. In view of the problem that the compensation accuracy of PI control is not ideal due to the bandwidth constraint,a double closed loop current control method based on repetitive control is proposed,and a double closed loop current controller is designed. Simulation and experimental results show that the proposed control strategy has a high steady-state compensation accuracy,which can effectively compensate the harmonic current caused by nonlinear loads. After compensation,the power grid current THD is reduced to below 5%,and the waveform is close to the sine wave.

关 键 词：混合型有源电力滤波器 谐波补偿 PI控制 重复控制 复合控制 

分 类 号：TM93[电气工程—电力电子与电力传动]