The existing configuration methods of spinning reserve(SR)only consider conventional units as the source of SR

and the advantages of new power facilities such as energy storage devices and flexible loads are not taken into account. This paper proposes the concept of generalized spinning reserve of power grid. And the fluctuation and prediction error models of equivalent load of power grid(difference between original load of power grid and renewable energy generation output at corresponding time)are established based on serialization modeling method and Copula function describing the dependence structure among variables. Considering the characteristics of system frequency response(SFR)

and taking the minimum total cost of generalized spinning reserve of power grid

power outage cost and power curtailment cost of renewable energy generation as objective functions

this paper proposes a new optimization strategy of generalized spinning reserve for power grid with high penetration of renewable energy. Finally

according to the actual data of a regional grid with high penetration of renewable energy in Xinjiang Uygur Autonomous Region

China

the feasibility of the proposed strategy is verified through simulation.