Energy storage control method and system for improving inertia level of power grid

The invention provides an energy storage control method and system for improving the inertia level of a power grid. The energy storage control method comprises the following steps: and determining thevirtual total inertia coefficient of the energy storage system based on the active power change rate of the energy storage system; determining the virtual inertia coefficient of the energy storage unit based on the virtual total inertia coefficient and the given active power coefficient of the energy storage unit. According to the energy storage control method, the inertia level of the power gridcan be improved through the coordinated distribution of the active power and the virtual moment of inertia of the energy storage system so as to effectively improve the violent oscillation of the active power outputted by the energy storage to recover to a stable value, suppress excessively fast frequency change and realize stable operation of the system. 本发明提供一种提高电网惯量水平的储能控制方法及系统，所述储能控制方法包括：基于所述储能系统的有功功率变化率，确定储能系统的虚拟总惯量系