基于改进正弦调制电流注入的三相交流电源系统谐波阻抗测量研究

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摘要三相交流电源系统在三相静止坐标系下的谐波阻抗参数是对系统进行谐波估计、滤波器设计等谐波分析的重要参数。但在采用基于阻抗的稳定性判据对交流系统进行稳定性分析时,需要得到系统在dq坐标系下的谐波阻抗参数。推导了系统中典型元件在dq坐标系下的谐波阻抗模型;提出了一种改进的基于正弦调制电流注入的交流系统谐波阻抗测量方法;搭建了三相交流系统的仿真模型,并开发了交流系统谐波阻抗测量装置。仿真与实验结果验证了理论分析的正确性与有效性。

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关键词 ：谐波阻抗, 测量, 正弦调制, 电流注入

Abstract：The harmonic impedance of system in static three-phase coordinates is the key parameter to estimate the harmonic in system. In the stability analysis of system based on impedance criterion, the harmonic impedance in dq coordinates must be extracted. The harmonic impedance models of typical elements in power system are derived. An improved impedance measurement method based on modulated current injection is proposed. A simulation model of three-phase ac system is developed in PSCAD and an impedance measurement unit is implemented. Both the simulation and experimental results validate the effectiveness of the proposed method.

Key words： Harmonic impedance measurement modulated current current injection

收稿日期: 2013-07-22 出版日期: 2015-05-25

PACS:

TM76

基金资助:国家自然科学基金项目（51177130）,台达2011电力电子科教发展计划重点项目（DREK2011002）

作者简介: 师洪涛男,1984年生,博士研究生,研究方向为微型电网的稳定性分析与控制分布式发电局域网系统的电能反应控制技术。卓放男,1962年生,教授,博士生导师,研究方向为分布式发电系统及微网的分析、建模与控制。

引用本文:

师洪涛, 卓放, 杨祯, 侯李祥, 岳小龙, 张东. 基于改进正弦调制电流注入的三相交流电源系统谐波阻抗测量研究[J]. 电工技术学报, 2015, 30(8): 257-264. Shi Hongtao, Zhuo Fang, Yang Zhen, Hou Lixiang, Yue Xiaolong, Zhang Dong. Study of Harmonic Impedance Measurement for Three-Phase AC Power System Based on an Improved Modulated Current Injection Method. Transactions of China Electrotechnical Society, 2015, 30(8): 257-264.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2015/V30/I8/257

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