Amplitude-Frequency Characteristic Analysis of Harmonic/Inter-harmonic of Grid-connected DFIG Based on Pulse Width Modulation

被引：0

作者：

Tao S. ^{[1
]}

Liu Y. ^{[1
]}

Zhao L. ^{[1
]}

Liao K. ^{[2
]}

机构：

[1] State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing

[2] Suzhou Power Supply Company, State Grid Jiangsu Electric Power Co., Ltd., Suzhou

来源：

Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2019年 / 43卷 / 20期

基金：

中国国家自然科学基金;

关键词：

Amplitude-frequency characteristic; Double-fed induction generator (DFIG); Harmonic; Inter-harmonic; Mathematical model; Pulse width modulation;

D O I：

10.7500/AEPS20190125002

中图分类号：

学科分类号：

摘要：

The grid-connected doubly-fed induction generator (DFIG) system is usually accompanied with the harmonic/inter-harmonic emission problem. By using the ideal impedance model of DFIG and the switching function of pulse width modulation (PWM), this paper deduces an analytical expression of harmonic/inter-harmonic voltage caused by back-to-back dual PWM convertor. Taking the filter structure and generator asynchronous characteristic into account, this paper also derives the amplitude and frequency formula for harmonic/inter-harmonic current with the DC voltage as input. Then the mechanism of modulation harmonic/inter-harmonic produced in the back-to-back convertor of DFIG is revealed. For the actual operation scenario of DFIG, the typical emission characteristics of harmonic/inter-harmonic with background harmonics are obtained. The PSCAD simulation and the analysis results based on the measured data of an actual wind farm show the accuracy of derived expressions and mechanism characteristic analysis. © 2019 Automation of Electric Power Systems Press.

引用

页码：153 / 161

页数：8

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