基于正序与离散辛普生积分均值公式的三相瞬时谐波检测算法  

An Algorithm of Instantaneous Harmonic Detection Based on Positive Sequence and Simpson's Formula in Three-phase Three-wire Power System

作　　者：刘传林[1] 侯宁宁[1] 张迎峰[1] 

机构地区：[1]广东水利电力职业技术学院电力系,广东广州510635

出　　处：《长沙电力学院学报（自然科学版）》2005年第3期5-9,共5页JOurnal of Changsha University of electric Power:Natural Science

摘　　要：在三相三线制中,三相谐波瞬时无功功率理论ip-iq运算变换的正序有功电流i+p和无功电流i+q只含3k(k为整数)次谐波.根据这一特征,设计应用离散辛普生积分公式计算均值的算法提取正序基波电流直流分量,通过反变换得到正序基波电流分量,再从该电流分量重构得到电流谐波分量.该算法可以减少谐波检测过程的计算量,易于实现数字运算.理论分析和MATLAB仿真表明,应用该算法的信号检测有较快的动态响应特性,能实现对三相电路谐波电流的检测.Because positive sequence active current i＋p （ positive sequence reactive current i＋q） contains only 3 k harmonics （ k is integer） according to i.he ip-iq calculating mode in 3-phase 3-wire, the authors proposed an instantaneous harmonic current detecting approach utilizing a filter algorithm to obtain direct component of the positive sequence fundamental current based on discrete Simpson＇ s formula integral average calculation. The positive sequence fundamental current can be extracted by inverse transform, and harmonic currents can be gained through reduction. This filter algorithm is easier in digital implementation and fewer in calculation. Computation and simulation showed that the harmonic detecting approach has preferable dynamic performance in harmonic detection and it can be aoDlied for 3-phase 3-wirepower system.

关 键 词：三相瞬时谐波检测 ip-iq运算方式 离散辛普生积分公式均值算法 MATLAB仿真实验 

分 类 号：TM930.1[电气工程—电力电子与电力传动] TM713