Impedance-based Stability Analysis of MMC-HVDC for Offshore DFIG-based Wind Farms

被引：0
|
作者：
Zhu, Maowei [1 ]
Xu, Yunyang [1 ]
Chen, Liang [1 ]
Nian, Heng [1 ]
机构：
[1] Zhejiang Univ, Coll Elect Engn, Hangzhou, Zhejiang, Peoples R China
来源：
2018 21ST INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS) | 2018年
基金：
中国国家自然科学基金;
关键词：
modular multilevel converter (MMC); DFIG-based wind farm; impedance modeling; stability analysis;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Impedance-based stability analysis method has been proved to be a simple and useful method to analyze the stability of an interconnected system. Due to the high-quality output voltage and low switching frequencies of MMC, it attracts widely-spread attention in HVDC transmission for wind farms. This paper develops the AC side small-signal impedance model of MMC based on multi-harmonic linearization. Based on the impedance model, the stability of MMC-HVDC for DFIG-based wind farms integration under small disturbance is analyzed and the potential resonant frequencies are predicted by using Nyquist stability criterion. Then the influences of transmission line parameters, controller parameters on system stability are analyzed in detail. The simulation model with a 36-level MMC and DFIG based wind farm is built based on Matlab/Simulink to validate the correctness of the impedance-based stability analysis method.
引用
收藏
页码：1139 / 1144
页数：6
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