基于阻抗比判据的永磁直驱风力发电系统并网稳定分析方法

沈阳武; 葛云霞; 崔挺; 熊尚峰; 吴云亮; 李勇; 邓小亮

引用本文:	沈阳武,葛云霞,崔挺,等.基于阻抗比判据的永磁直驱风力发电系统并网稳定分析方法[J].电力系统保护与控制,2017,45(18):45-53.
	SHEN Yangwu,GE Yunxia,CUI Ting,et al.A stability analysis method for the gird-connected permanent magnet synchronous generator based on impedance ratio criterions[J].Power System Protection and Control,2017,45(18):45-53

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基于阻抗比判据的永磁直驱风力发电系统并网稳定分析方法
沈阳武¹,葛云霞¹,崔挺¹,熊尚峰¹,吴云亮²,李勇³,邓小亮⁴
(1.国网湖南省电力公司电力科学研究院，湖南长沙 410007;2.中国南方电网电力调度控制中心，广东广州 510000; 3.湖南大学电气与信息工程学院，湖南长沙 410082;4.国网湖南省电力公司，湖南长沙 410007)

摘要:

考虑永磁直驱风力发电系统(Permanent Magnet Synchronous Generator, PMSG)的动态特性，提出一种基于阻抗比判据的PMSG并网稳定性分析方法，以提高PMSG并网稳定分析的准确性。首先，基于阻抗比稳定分析原理，推导含变换器系统的并网稳定判据。然后，考虑PMSG的动态特性，在建立状态空间方程的基础上推导出PMSG的小信号模型，进而推导PMSG的输出阻抗表达式，据此分析PMSG并网稳定分析方法且得出具体实现流程。最后，利用PSASP分别搭建含PMSG的简单系统和WSCC-9节点仿真系统。仿真结果验证了所提方法的有效性和准确性。

关键词: 永磁直驱风力发电系统阻抗比判据小信号模型稳定性电力电子变换器

DOI：10.7667/PSPC161358

分类号:

基金项目:国家自然科学基金(51377001，61233008，51520105);湖南省电力公司科技项目(5216A516002C，5216A515002V);科技部国际合作项目(2015DFR70850)

A stability analysis method for the gird-connected permanent magnet synchronous generator based on impedance ratio criterions

SHEN Yangwu¹,GE Yunxia¹,CUI Ting¹,XIONG Shangfeng¹,WU Yunliang²,LI Yong³,DENG Xiaoliang⁴

(1. State Grid Hunan Electric Power Corporation Research Institute, Changsha 410007, China;2. China Southern Power Grid Power Operation and Control Centre, Guangzhou 510000, China;3. College of Electrical and Information Engineering, Hunan University, Changsha 410082, China;4. State Grid Hunan Electric Power Company, Changsha 410007, China)

Abstract:

A method is proposed to improve the accuracy of stability analysis for a gird-connected permanent magnet synchronous generator (PMSG) system based on the impedance ratio criterion, which considers the dynamic characteristics of PMSGs. Firstly, stability analysis theory for the system with electronic converters is deduced using the impedance ratio criterion. And then, the small signal model of a PMSG is established including its dynamic characteristics. Based on the small signal model, the output impedance of a PMSG is derived. Next, the stability analysis method for the gird-connected PMSG is obtained. At last, the simulation results on a PMSG simple system and the WSCC-9 bus system using PSASP verify the effectiveness and accuracy of the proposed method. This work is supported by National Natural Science Foundation of China (No. 51377001, No. 61233008 and No. 51520105).

Key words: magnet synchronous generator (PMSG) impedance ratio criterion small signal model stability power electronic converter

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