电网畸变不平衡条件下基于MAF-ANF的谐波检测方法研究  

Research on harmonic detection method based on MAF-ANF under unbalanced and distorted network voltage conditions

作　　者：张国荣[1] 邓凯文 解润生 吴飞翔 魏伟 Zhang Guorong;Deng Kaiwen;Xie Runsheng;Wu Feixiang;Wei Wei(School of Electrical and Automation Engineering,HFUT,Hefei 230009,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009

出　　处：《电测与仪表》2019年第3期116-123,共8页Electrical Measurement & Instrumentation

基　　金：国家重点研发计划(2017YFB0903100)

摘　　要：有源电力滤波器(Active Power Filter,APF)补偿电流检测环节对其补偿性能有着重要的影响。三相电网电压不对称且畸变时,传统的p-q法和i_p-i_q法无法准确实现对负荷综合补偿。为此文中引入基于滑动平均滤波器-自适应陷波滤波器(MAF-ANF)的方法实现对非理想电网电压条件下网侧电压的处理,得到平衡无畸变的电网电压,并对负载电流处理,得到准确的基波电流正序分量。然后对传统p-q法进行改进,得到了基于MAF-ANF的谐波检测方法,该方法较传统方法谐波检测精度提高,取得了更好的补偿效果。最后通过Simulink仿真证明了在非理想电网电压条件下所提检测算法的正确性和有效性。The detection of compensation current has an important impact on the performance of active power filter.The traditional method of p-q and ip-iq cannot be accurately achieve the comprehensive compensation of load with the unbalanced and distorted three-phase voltage.In this paper,the method based on MAF-ANF is introduced which processes the distorted grid voltage in order to obtain an undistorted and balanced voltage.The load current is also processed to get the correct fundamental positive component.The traditional p-q method is improved,and the harmonic detection method based on MAF-ANF is deduced.This method improves the accuracy of harmonics detection and obtains better compensation effect.Finally,the correctness and effectiveness of the proposed detection algorithm under the condition of non-ideal grid voltage are proved by Simulink simulation.

关 键 词：有源电力滤波器 畸变不平衡 滑动平均滤波器 自适应陷波滤波器 谐波检测 

分 类 号：TM933[电气工程—电力电子与电力传动]