Through the joint mediation of photovoltaic power generation, thermal power generation, hydropower station and wind power station, give full play to the inexhaustible characteristics of new energy and the stability characteristics of thermal power and hydropower, output stable and reliable energy, and avoid the instability of simple wind power and photovoltaic power station and the high pollution of thermal power. ● multi energy complementary and balanced power supply ● improve the stability and economy of power grid ● improve the predictability of power grid and power dispatching