The influence of the spatiotemporal complementarities of countrywide dispersed wind power on the China electricity system

China has begun to build eight 10-million-kilowatt wind power bases and the wind power can reach 230 GW of installed capacity by 2020. Such large-scale integration of wind power will have significant impacts on the power system, such as increasingly outstanding difficulties of peak load regulating, the bottleneck of grid integrating capability, and so on. But keeping view of geographically dispersed wind energy resources in a larger scope or even countrywide scope may be an effective way to solve those above problems. In this case, due to the spatiotemporal complementarities of dispersed wind generation, electricity power from wind energy changes slowly, thus to benefit the safe and economic operation of the power system. Hence, based on real wind data which is provided by the China Meteorological Administration (CMA), this paper investigates the impacts of the complementary effect of countrywide dispersed wind energy on the power system. Both short term and long term effects of wind power on the power system are investigated. The results show that the countrywide complementary effect of dispersed wind energy resources could bring various benefits to operation of China electricity system.