畸变电源电压下的谐波检测方法与仿真研究 harmonic detecting method and simulating study under distorted supply voltage.pdfVIP

电气传动 2007年第37卷第7期 畸变电源电压下的谐波检测方法与仿真研究 畸变电源电压下的谐波检测 方法与仿真研究 董海波冯宇方永丽 中国矿业大学 摘要：准确、快速、容易实现的谐波检测方法对于有源滤波器的控制十分重要。在总结现有谐波检测理论 的基础上提出了一种谐波检测方法。该方法不受电源电压畸变的影响，通过对三相电源电压的预处理分离出 电压正序分量，进而利用d—q变换实现了电流基波正序有功分量的准确检测；分析了电压电流的基波正序分 量夹角对检测结果的影响；给出了一种缩短检测信号移相延时的策略。仿真结果表明该方法能够准确快速地 进行谐波检测。 关键词：电源电压畸变谐波检测 信号移相延时 Ha珊onic Methodand underDistorted Detecting SimulatingStudy SupplyVoltage Haibo Yu Dong Feng FangYongli Abstract：Anexact，fast，and methodof harmonicis tothecontrol easilyimplementeddetecting important ofactivefilter．Amethodof harmonicwas forward the harmonic detecting brought bysummarizingexisting theories．Thismethodisnotaffectedthedistorted andit the by power detecting voltageseparatesvoltageposi— it tive—order thethree Then theexact of componentbypretreatingphasepowervoltage． implementsdetecting thecurrentfundamentalwave active transformation．Italso the positive_ordercomponentusing矗一q analyzes effectonthe resultsthefundamentalwave of andcurrentand detectingby positive—ordercomponentvoltage a of the Thesimulationresultindjcatesthat gives phase—shiftjngtime—delay． strategyshortjngdetectingsignal this methodcandetecttheharmonicfastand exactly． harmonicdetectio