Equivalent modeling and small-signal stability analysis on PMSG-based large-scale wind farm connected to power system via VSC-HVDC

被引：0
|
作者：
Ren B. [1 ,2 ]
Sun R. [1 ]
Li Q. [1 ]
Gan D. [3 ]
Zhou Q. [1 ]
Wang C. [1 ]
机构：
[1] State Grid Jiangsu Electric Power Company Limited Research Institute, Nanjing
[2] State Grid Jiangsu Electric Power Company Limited, Nanjing
[3] College of Electrical Engineering, Zhejiang University, Hangzhou
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2022年 / 42卷 / 05期
关键词：
Dynamic interaction; Equivalent model; Large-scale wind farms; Small-signal stability analysis; VSC-HVDC power transmission;
D O I：
10.16081/j.epae.202203023
中图分类号：
学科分类号：
摘要：
The order of the detailed model for large-scale wind farm with wind turbines integrated to AC system via VSC-HVDC(Voltage Source Converter-based High Voltage Direct Current) is too high, which brings challenges to the small-signal stability analysis and instability mechanism research. For that, the open-loop and closed-loop linear state space models of wind farm integrated to AC system via VSC-HVDC are built. Based on the open-loop state space model of wind farm and the relationship between the nodal voltage and current of wind farm, the full-order wind farm model is equivalent through the single wind turbine dynamic and the information matrix of AC topology, meanwhile the impacts of output power of wind turbine, interconnected location of wind turbine, topological structure of wind farm and number increase of wind turbines on oscillation mode damping of wind farm are analyzed. The closed-loop interconnected model of wind farm and VSC-HVDC system is derived based on the reduced-order model of wind farm, and the influences of possible strong dynamic interaction between two subsystems on the small-signal stability are analyzed when the number of wind turbines increases. The research shows that when the number of wind turbines increases, the damping of dominated oscillation mode decreases. When it is closed to an open-loop oscillation mode of VSC-HVDC converter, the strong dynamic interaction induced by modal resonance may cause the system instability. © 2022, Electric Power Automation Equipment Press. All right reserved.
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页码：142 / 152
页数：10
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