基于三阶广义积分器的谐波检测算法  

Harmonic Detection Algorithm Based on Third-order Generalized-integrator

作　　者：武健[1] 张彩红[1] 王蕊[1] 漆岳 尤燕飞 徐殿国[1] WU Jian;ZHANG Caihong;WANG Rui;QI Yue;YOU Yanfei;XU Dianguo(School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150006,China)

机构地区：[1]哈尔滨工业大学电气工程及自动化学院,哈尔滨150006

出　　处：《电源学报》2018年第2期131-136,共6页Journal of Power Supply

基　　金：国家自然科学基金资助项目(51407043);台达环境与教育基金会电力电子科教发展基金资助项目(DREM2014015)~~

摘　　要：分布式电源的快速发展使并网逆变器、有源阻尼器等主动型电能变换器得到广泛应用,这就要求在畸变电网下谐波检测应具有一定的精度。针对现有的谐波检测算法在存在直流偏置的畸变电网下不能保证输出精度的问题,提出了基于三阶广义积分的谐波检测算法。利用三阶广义积分的输出特性,消除直流偏置对频率自适应环节的影响,实现角频率的稳定输出,提高了基波和各次谐波的检测精度。最后在Matlab中进行了仿真研究,仿真结果证明了该算法在存在直流偏置的畸变电网下进行谐波检测的有效性。Along with the fast development of distributed generations,more and more active power inverters(e.g.,grid-connected inverters,active dampers,etc)are being applied to the distribution network,which requires a high accuracy of harmonic detection for the distorted grid.Considering that the existing harmonic detection algorithms cannot guarantee the output accuracy of distorted grid with DC offset,a novel harmonic detection algorithm based on third-order generalized-integrator(TOGI)is proposed in this paper,which can eliminate the effect of DC-offset on the frequency selflalldaptation through the output characteristics of TOGI,thus achieving stable output of angular frequency and improving the detection accuracies of fundamental wave and harmonics of different orders.A simulation is performed in Matlab,and the results show that this algorithm is effective to detect harmonics in the distorted grid with DC-offset.

关 键 词：谐波检测 直流偏置 三阶广义积分 频率自适应 

分 类 号：TM935[电气工程—电力电子与电力传动]