Subsynchronous Oscillation Caused by Grid-connection of Offshore Wind Farm Through VSC-HVDC and Its Mitigation

被引：0
|
作者：
Bian X. [1 ]
Ding Y. [1 ]
Mai K. [2 ]
Zhou Q. [3 ]
Zhao Y. [1 ]
Tang L. [4 ]
机构：
[1] School of Electric Power Engineering, Shanghai University of Electric Power, Shanghai
[2] Cangxian Power Supply Branch of State Grid Hebei Electric Power Supply Co. Ltd., Cangzhou
[3] School of Mechatronic Engineering and Automation, Shanghai University, Shanghai
[4] East China Electric Power Dispatching and Control Sub-center of State Grid, Shanghai
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2018年 / 42卷 / 17期
关键词：
Offshore wind farm; Participation factor; Supplementary damping control; Torsional vibration; Voltage-source-converter based high-voltage direct current (VSC-HVDC) transmission;
D O I：
10.7500/AEPS20170703003
中图分类号：
学科分类号：
摘要：
The voltage-source-converter based high-voltage direct current (VSC-HVDC) transmission technology has become an ideal solution for grid-connection of remote offshore wind farms. As the offshore wind generation unit using large-scale wind turbines, the elastic coefficient of each mass of the shaft is larger than that of conventional inland wind generation unit. When the offshore wind farms integrated to the power grid through VSC-HVDC, two subsynchronous oscillations are triggered, i.e., the torsional vibration of the turbine shaft and the subsynchronous oscillation caused by the interaction between the wind turbine and the VSC-HVDC converter. This paper developes a small signal model for grid-connection of offshore wind farm through VSC-HVDC. Then the two oscillation modes and the corresponding strong correlation state variables are analyzed by the participant factor analysis. On this basis, the root locus curve of the strong correlation state parameter is plotted by the eigenvalue analysis method, and its influence on the electrical damping characteristics of the system is analyzed. Based on the signal test method, this paper proposes a co-suppression method of supplementary excitation damping controllers for DFIG-based wind turbines and VSC-HVDC system with supplementary damping control. The co-suppression method is verified by the simulation on DIgSILENT/PowerFactory. © 2018 Automation of Electric Power Systems Press.
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页码：25 / 33
页数：8
相关论文
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