Control strategy for secondary frequency regulation in hybrid energy storage considering real-time dispatchable power and maximum output constraintsOA
Hybrid energy storage systems(HESSs)involved in secondary frequency regulation(FR)can overcome the technical limitations of single energy storage systems(ESSs).However,coordinating the control of ESSs with differing characteristics remains a major challenge.In this study,we propose a cooperative control strategy for HESSs in automatic generation control FR.First,the maximum output dynamic adjustment factor of the flywheel energy storage system(FESS)and the real-time dispatchable power of ESSs are introduced to constrain the charge/discharge power of ESSs.Subsequently,a coordinated allocation strategy of prioritizing the FESS,i.e.,battery energy storage system(BESS)supplementation,is adopted to pre-allocate the FR power of HESSs between BESSs and FESSs.Second,we minimized the energy loss and balanced the state of charge(SOC)of each ESS to redistribute the pre-allocated FR power of each ESS among the internal energy storage units.Finally,we conducted a simulation analysis using actual operational data.The findings indicate that the proposed strategy can reduce the lifetime loss of the BESS and enhance the continuous operating capability of the FESS.This system can also reduce the energy loss in each ESS,thereby effectively maintaining the SOC equilibrium of each system.
Cuiping Li;Liang Zhang;Wenbo Si;Caiqi Jia;Xingxu Zhu;Gangui Yan;Junhui Li
Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology,Ministry of Education,Northeast Electric Power University,Jilin 132012,PR ChinaKey Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology,Ministry of Education,Northeast Electric Power University,Jilin 132012,PR ChinaSuichang County Power Supply Company,State Grid Zhejiang Electric Power Co.,Ltd.,Lishui 323300,PR ChinaInner Mongolia UHV Branch,State Grid Inner Mongolia East Electric Power Co.,Ltd.,Xilinhot 026000,PR ChinaKey Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology,Ministry of Education,Northeast Electric Power University,Jilin 132012,PR ChinaKey Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology,Ministry of Education,Northeast Electric Power University,Jilin 132012,PR ChinaKey Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology,Ministry of Education,Northeast Electric Power University,Jilin 132012,PR China
信息技术与安全科学
Hybrid energy storageDynamic adjustment factorReal-time dispatchable powerEnergy lossSOC balancing
《Global Energy Interconnection》 2026 (3)
P.471-488,18
supported by the Key Projects of the National Natural Science Foundation of China(No.:52337004).
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