考虑不对称转速边界约束的变速抽蓄机组综合惯量调频控制OA北大核心CSTPCD

When the frequency of the power system drops,the variable-speed pumped storage(VSPS)unit can greatly reduce its speed and quickly release the rotor kinetic energy to provide inertia support for the system.However,the existing frequency regulation strategies fail to effectively take the advantage of the VSPS unit.In order to make full use of the rotor kinetic energy,a comprehensive inertia frequency regulation control strategy of the VSPS unit is proposed,which takes into account the asymmetric speed boundary constraints.First,based on the active power support characteristics and asymmetric speed constraints of the VSPS unit,the optimal frequency control structure suitable for the VSPS unit is derived,which includes two virtual inertia control links with different time constants.Then,the function of each inertia control link is analyzed and the related parameters are set.On this basis,considering the operation characteristics of the VSPS unit and the frequency regulation demands of the power system,the asymmetric comprehensive inertia control strategy of the VSPS unit is designed,through which the unit can provide greater inertia support to the system when the speed is reduced.Simulation results show that the proposed frequency regulation strategy can give full play to the advantages of the VSPS unit and maintain system frequency stability.