基于二阶广义积分器的改进型ip-iq谐波检测算法  

An improved ip-iq harmonic detection algorithm based on second-order generalized integrator

作　　者：古超帆 张新燕[1] 童涛 孔德钱 张家军 高亮 Gu Chaofan;Zhang Xinyan;Tong Tao;Kong Deqian;Zhang Jiajun;Gao Liang(School of Electrical Engineering,Xinjiang University,Urumqi 830047,China)

机构地区：[1]新疆大学电气工程学院,乌鲁木齐830047

出　　处：《电测与仪表》2020年第10期88-93,共6页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51667018)。

摘　　要：针对电网直流分量和高次谐波对谐波电流检测精度的影响,提出了一种基于二阶广义积分器的改进型ip-iq谐波检测算法。该算法在传统ip-iq法的结构上加入了改进型SOGI滤波环节,有效滤除了输入信号中的直流分量同时还抑制了高次谐波,改进型SOGI的锁相环在电网电压含高次谐波和直流分量的情况下能提供稳定的电网电压频率,从而能够更准确检测出谐波电流。仿真算例对比分析了传统ip-iq法和基于一般SOGI的ip-iq法,验证了文中提出的谐波检测方法在电网含直流分量和高次谐波时的有效性和可靠性。Aiming at the influence of DC component and high-order harmonics on accuracy of harmonic current detection,an improved ip-iqharmonic detection algorithm based on second-order generalized integrator is proposed in this paper. The improved SOGI filter link is added to the structure of traditional ip-iqalgorithm to effectively filter the DC component of the input signal and suppress the high-order harmonics. The improved SOGI phase-locked loop can provide stable grid voltage frequency when the grid voltage contains high-order harmonics and DC components,so that the harmonic current can be detected more accurately. The traditional ip-iqalgorithm and the ip-iqalgorithm based on general SOGI are compared and analyzed by simulation examples,which verifies the effectiveness and reliability of the proposed harmonic detection method when the power grid contains DC component and high-order harmonic.

关 键 词：IP-IQ法 二阶广义积分器 谐波检测 直流分量 

分 类 号：TM933[电气工程—电力电子与电力传动]