Energies, Vol. 17, Pages 1683: Research on Sub-Synchronous-Oscillation Energy Analysis and Traceability Method Based on Refined Energy

Energies, Vol. 17, Pages 1683: Research on Sub-Synchronous-Oscillation Energy Analysis and Traceability Method Based on Refined Energy

Energies doi: 10.3390/en17071683

Authors: Zhixiang Zhang Jingying Yang Shuyu Zhou Cheng Liu Song Gao Zhichong Cao

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.