计及储能电站荷电状态恢复和调整的电力系统调频指令最优分配方法OA北大核心CSTPCD

Excessive discharge of energy storage stations accelerates their energy depletion,which not only diminishes the frequency regulation capability of the energy storage resources and the overall system but also exacerbates the frequency regulation burden on other resources.To ensure the secure and stable operation of the power system and the high proportion consumption of new energy sources,this paper establishes a two-layer distribution model for secondary frequency regulation commands involving the coordinated participation of multiple types and heterogeneous resources.Firstly,an analysis of the characteristics of multi-type heterogeneous resources participating in system frequency regulation is conducted,and a mechanism for invoking frequency regulation resources that considers dynamic load reduction of new energy sources is formulated.Subsequently,based on this mechanism,a two-layer distribution model for frequency regulation commands is developed,which takes into account the state of charge recovery and adjustment.In the upper-layer model,a flexible allocation strategy for frequency regulation commands is designed,which involves the coordinated participation of new energy sources and energy storage,thus significantly enhancing the recovery speed of the charged state of energy storage stations.In the lower-layer model,considering the differences in the state of charge among energy storage stations,adjustment coefficients are introduced,effectively improving the energy distribution within the energy storage resources.Finally,a case study analysis is conducted using a typical regional power system as an example.The results demonstrate that the proposed model effectively enhances the sustainability of frequency regulation provided by energy storage resources,thereby improving the system's frequency regulation capability and ensuring the high proportion consumption of new energy sources.