基于瞬时无功功率理论的新型谐波检测算法.pdfVIP

学兔兔 总第49卷 第556期 电测与仪表 Vo1．49 No．556 2012年 第4期 Electrical Measurement＆ Instrumentatjon Apr．2012 基于瞬时无功功率理论的新型谐波检测算法 王子绩，孟鑫，张彦兵，周娟 (中国矿业大学 信息与电气工程学院，江苏徐州1 221008) 摘要：为降低谐波提取环节的运算量，快速、准确地检测出三相系统的谐波电流，本文在传统的基于瞬时无功功 率理论的 厂 法基础之上，提出了将谐波检测环节中锁相环的鉴相部分与Park变换相结合的新型谐波检测算 法。所提方法不使用电压信息直接提取谐波，消除了传统方法中由于电压畸变、不对称和电压采集所带来的检 测误差，且鉴相环节和Park变换相结合，节省了运算时间。与基于广义积分器和传统i 、i 法的谐波检测算法相 比，该方法可以更为快速准确地提取谐波。通过仿真和实验，验证了该谐波检测方法的正确性和优越性。 关键词：有源电力滤波器；谐波检测；瞬时无功功率；MATLAB；DSP 中图分类号：TM464 文献标识码：A 文章编号：1001—1390(2012)04—0009—05 A New Harmonic Detection Algorithms Based on the Instantaneous Reactive Power Theory WANG Zi-ji，MENG Xin，ZHANG Yan-hing，ZHOU Juan (School ofInformation and Electrical Engineering，China Univ．ofMining and Tech．，Xuzhou 221008，Jiangsu，China) Abstract：In order to reduce the computation in the harmonic extraction link，rapid and accurate detection otharmonic currents of the three—phase system，the paper proposed a new type of harmonic detection algorithms which combined the phase part in the PLL with the Park transformation based on the d一 method of instantaneous reactive power theory．This method extracts harm onic without using the voltage information which can eliminate the detection errors brought by voltage distortion，asymmetric and voltage acquisition in the traditional way，and with the combination of the two parts saves the computing time．Compared with the harmonic detection algorithm based on the generalized integrator and id-i g method，this new process can extract harmonic rapidly and exactly．The simulation and experiment verify the correctness and superiority of