p-q法在三相四线制电路谐波检测中的应用  

Theoretical Investigation of p-q Theory Applied to Harmonic Detection in Four-Wire System

作　　者：张颖[1] 陈艳慧[2] 

机构地区：[1]南京邮电学院电子工程系,南京210003 [2]福州大学电气工程与自动化学院,福州350002

出　　处：《山东电力技术》2005年第3期50-52,共3页Shandong Electric Power

摘　　要：由于C32变换要求三相电流之和为零,p-q谐波检测法一般直接用于三相三线制电路。当p-q法用于三相四线制电路中时,一般的做法是先减去电流中的零序谐波分量。本文提出可以在三相四线制电路中直接用p-q法检测系统的谐波分量,包含零序分量。仿真实验也验证了这种方法是可行的。Harmonic detection using p-q theory is usually applied to three-ph ase three-wire circuit directly for the simple reason that the C32 transformati on requires that the sum of three-phase current equals to zero. The zero sequen ce harmonic component is commonly subtracted from the current before p-q theory is applied to three-phase four-wire circuit. A method is brought forward in t his paper to detect harmonic and zero sequence component using p-q theory direc tly. The simulation demonstrates the feasibility of it.

关 键 词：p-q法 谐波检测 三相四线制 

分 类 号：TM935[电气工程—电力电子与电力传动]