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Overview of Subsynchronous Oscillation in Grid-connected Wind Farm

[ Vol. 13 , Issue. 7 ]

Author(s):

Xu Pei-Zhen, Lu Yong-Geng and Cao Xi-Min*   Pages 969 - 979 ( 11 )

Abstract:


Background: Over the past few years, the subsynchronous oscillation (SSO) caused by the grid-connected wind farm had a bad influence on the stable operation of the system and has now become a bottleneck factor restricting the efficient utilization of wind power. How to mitigate and suppress the phenomenon of SSO of wind farms has become the focus of power system research.

Methods: This paper first analyzes the SSO of different types of wind turbines, including squirrelcage induction generator based wind turbine (SCIG-WT), permanent magnet synchronous generator- based wind turbine (PMSG-WT), and doubly-fed induction generator based wind turbine (DFIG-WT). Then, the mechanisms of different types of SSO are proposed with the aim to better understand SSO in large-scale wind integrated power systems, and the main analytical methods suitable for studying the SSO of wind farms are summarized.

Results: On the basis of results, using additional damping control suppression methods to solve SSO caused by the flexible power transmission devices and the wind turbine converter is recommended.

Conclusion: The current development direction of the SSO of large-scale wind farm grid-connected systems is summarized and the current challenges and recommendations for future research and development are discussed.

Keywords:

SSO, Wind farm, mechanism, analytical method, suppression, grid-connected.

Affiliation:

School of Electrical Engineering, Shanghai Dianji University, Shanghai, School of Electrical Engineering, Shanghai Dianji University, Shanghai, School of Electrical Engineering, Shanghai Dianji University, Shanghai



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