Research on Sub-Synchronous-Oscillation Energy Analysis and Traceability Method Based on Refined Energy

Zhixiang Zhang, Jingying Yang, Shuyu Zhou, Cheng Liu (), Song Gao and Zhichong Cao
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Zhixiang Zhang: School of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China
Jingying Yang: State Grid Jilin Electric Power Company Limited, Changchun 130028, China
Shuyu Zhou: School of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China
Cheng Liu: School of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China
Song Gao: State Grid Jilin Electric Power Research Institute, Changchun 130021, China
Zhichong Cao: School of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China

Energies, 2024, vol. 17, issue 7, 1-13

Abstract: At present, most studies use the direct method to analyze the oscillation problem of modern power systems. However, these studies often only simplify the external characteristics of the wind turbine and lack an in-depth understanding of its internal refined energy structure. In this paper, based on the direct-drive permanent magnetic synchronous generator’s detailed model (D-PMSG), combined with the dynamic energy of its port, layers of analysis are performed on the wind turbine’s internal connections, and a detailed model of the energy structure is created. Then, the interaction mechanism of each control link in the wind turbine is analyzed by combining the energy function of the wind turbine with the improved perturbation method. Finally, this paper constructs a sub-synchronous oscillation (SSO) scenario of weak damping and a forcing type and proves the accuracy and effectiveness of the traceability method based on the refined energy of D-PMSG. This traceability method based on refined energy is expected to provide a new solution to the stability problem caused by the integration of new energy.

Keywords: sub-synchronous oscillation; refined modeling; energy function; direct-drive permanent magnetic synchronous generator (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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