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Adaptive VSG control of flywheel energy storage array for frequency support in microgrids

Global Energy Interconnection 2024年第5期7卷 563-576页

作者： Penghui Ren Jingwen Zheng Liang Qin Ruyin Sun Shiqi Yang Jiangjun Ruan Kaipei Liu Tinghui Ouyang Hubei Key Laboratory of Power Equipment&System Security for Integrated Energy Wuhan 430072P.R.China School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072P.R.China Electric Power Research Institute State Grid Hubei Electric Power Co.Ltd.Wuhan 430077P.R.China Center for Computational Sciences University of Tsukuba(UT)Ibaraki 305-8577Japan

The application of virtual synchronous generator(VSG)control in flywheel energy storage systems(FESS)is an effective solution for addressing the challenges related to reduced inertia and inadequate power supply in *** the significant variations among individual units within a flywheel array and the poor frequency regulation performance under conventional control approaches,this paper proposes an adaptive VSG control strategy for a flywheel energy storage array(FESA).First,by leveraging the FESA model,a variable acceleration factor is integrated into the speed-balance control strategy to effectively achieve better state of charge(SOC)equalization across ***,energy control with a dead zone is introduced to prevent SOC of the FESA from exceeding the *** dead zone parameter is designed based on the SOC warning intervals of the flywheel array to mitigate its impact on regular *** addition,VSG technology is applied for the grid-connected control of the FESA,and the damping characteristic of the VSG is decoupled from the primary frequency regulation through power differential *** ensures optimal dynamic performance while reducing the need for frequent involvement in frequency ***,a parameter design method is developed through a small-signal stability ***,considering the SOC of the FESA,an adaptive control strategy for the inertia damping and the P/ωdroop coefficient of the VSG control is proposed to optimize the grid support services of the ***,the effectiveness of the proposed control methods is demonstrated through electromagnetic transient simulations using MATLAB/Simulink.

关键词： flywheel array control Virtual Synchronous Generator Microgrid Frequency regulation Adaptive control

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