有源电力滤波器直流侧电压的复合控制  

Compound Control Method for DC-link Voltage of Active Power Filter

作　　者：李自成[1] 赵功建 刘国海[1] 许德志 LI Zi-cheng;ZHAO Gong-jian;LIU Guo-hai;XU De-zhi(Jiangsu Universityy Zhenjiang 212013,China)

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《电力电子技术》2019年第3期103-107,共5页Power Electronics

基　　金：江苏高校优势学科建设工程资助项目(PAPD);江苏省高校自然科学研究项目(13KJB470004)~~

摘　　要：直流侧电容电压的控制是有源电力滤波器(APF)的关键技术之一。APF的补偿性能和功率损耗都与其直流侧电容电压有一定的关系。根据直流侧电容电压波动和补偿性能、功率损耗及电网电压之间的关系,采用下垂控制器调节直流侧电容电压参考值。考虑到电网电压波动和负载突变等情况,提出了一种鲁棒性好、稳态精度高的改进型滑模比例积分(PI)控制。仿真和实验结果表明:使用下垂控制器实时调节直流侧电容电压能够有效地提高补偿性能;使用改进的滑模PI控制能够提高滑模PI调节的稳态精度和对负载突变的响应速度。DC-link capacitor voltage control is one of the key techniques of an active power filter(APF). Both the compensation performance and power loss of the APF have some relation to the DC-link capacitor voltage.Adopting a droop controller in order to regulate the DC-link capacitor voltage reference, according to the relationships of the DClink capacitor voltage fluctuations and the compensation performance, power loss and grid voltage.An improved sliding mode proportional integral control method is proposed with good robustness and high steady-state precision, considered the grid voltage fluctuations and sudden load changes.Simulation and experimental results indicate that the droop controller can be used to adjust the DC-link capacitor voltage in real time,and thus the compensation performance.And the improved sliding mode PI control method can be used to improve the severe overshoot of PI regulation, and the steady-state precision and response speed of sudden load changes.

关 键 词：有源电力滤波器 电容电压控制 下垂控制器 滑模 

分 类 号：TN713.8[电子电信—电路与系统]