稳态锁相误差对SAPF谐波抑制的影响  

Effects of Steady-state Error for Phase-lock on Harmonic Suppression of SAPF

作　　者：杨兵圆 戴珂 徐宏伟 方梓熙 YANG Bing-yuan;DAI Ke;XU Hong-wei;FANG Zi-xi(State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University of Science and Technology,Wuhan 430074,China;不详)

机构地区：[1]华中科技大学,电气与电子工程学院,强电磁工程与新技术国家重点实验室,湖北武汉430074 [2]上海交通大学,电子信息与电气工程学院,风力发电研究中心,上海200240

出　　处：《电力电子技术》2020年第8期11-14,共4页Power Electronics

基　　金：国家自然科学基金(51277086)。

摘　　要：并联型有源电力滤波器(SAPF)的控制系统需要利用锁相环(PLL)获得实时的电网电压相位。当电网电压不平衡或者存在谐波干扰时,PLL的锁相结果会存在稳态误差。此处针对直流和交流两种稳态锁相误差,分析了其对SAPF谐波抑制的影响。理论分析表明,稳态锁相误差对SAPF谐波抑制的影响可以忽略不计。最后通过样机实验对理论分析的结果进行了验证。The control system of shunt active power filter(SAPF)requires a phase-locked loop(PLL)to obtain realtime phase of the grid voltage.When grid voltage is unbalanced or interfered by harmonics,there will be steady-state errors in the phase-locked result of PLL.The effects of DC and AC steady-state errors for phase-locked on harmonic suppression of SAPF are analyzed.The theoretical analyses show that the effects of steady-state error for phase-locked on harmonic suppression of SAPF can be neglected,which is finally verified by prototype experiments.

关 键 词：并联型有源电力滤波器 锁相环 稳态误差 谐波抑制 

分 类 号：TN713[电子电信—电路与系统]