Effect analysis and experiment of broadband sub-synchronous resonance suppression of DFIG-based wind farm groups based on VSC

被引：0
|
作者：
Liao K. [1 ]
Xiao X. [1 ]
Luo C. [2 ]
Tao S. [1 ]
Yang Z. [1 ]
Yu H. [3 ]
Liu Z. [3 ]
Liu H. [4 ]
机构：
[1] State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing
[2] Electric Power Research Institute, CSG, Guangzhou
[3] Global Energy Interconnection Research Institute, Beijing
[4] Electric Power Research Institute, State Grid Jibei Electric Power Co., Ltd., Beijing
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2019年 / 39卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Broadband sub-synchronous resonance; DFIG-based wind farm groups; Digital-physical closed loop simulation; Effect analysis; Resonance suppression; Time-varying frequency; Voltage source converter;
D O I：
10.16081/j.epae.201909043
中图分类号：
学科分类号：
摘要：
The SSR(Sub-Synchrous Resonance) frequency of DFIG(Doubly-Fed Induction Generator)-based wind farm is broadband and time-varying, which brings difficulties to its suppression. Thus, based on the parallel VSC(Voltage Source Converter) technology, the suppression device of broadband SSR for DFIG-based wind farm groups is designed, which is installed on the assemble line of wind farm groups. The suppression device is equivalent to a controlled source, the general form and simplified form of equivalent circuit for analyzing the suppression effect of the device on the SSR of DFIG-based wind farm are given, and the suppression effect is revealed through the response equation of the sub-synchronous current. The sub-synchronous current of the assemble line is measured as the feed-in signal, the oscillation modes are extracted by using the broadband filter and phase compensation scheme, whose amplitude and phase are adjusted, then the sub-synchronous damping current is injected into the system, suppressing SSR by increasing the system damping. Experimental results of digital-physical closed loop simulation under different working conditions show that through parameter optimization design, the device can quickly and accurately detect the broadband SSR signal and realize effective suppression, so as to solve the time-varying SSR of large-scale wind farm groups. © 2019, Electric Power Automation Equipment Press. All right reserved.
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页码：71 / 79
页数：8
相关论文
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