The power industry converts coal, oil, natural gas, nuclear fuel, water energy, marine energy, wind energy, solar energy, biomass energy and other primary energy into electric energy through power generation facilities, and then supplies users as the energy industry sector through power transmission, transformation and distribution systems. The industrial sector that produces, transmits and distributes electrical energy. Including power generation, transmission, transformation, distribution and other links. The production process and consumption process of electric energy are carried out at the same time, which can neither be interrupted nor stored. It needs unified dispatching and distribution. The electric power industry provides basic power for industry and other sectors of the national economy. Subsequently, a number of large and medium-sized hydropower projects have been built in areas where conditions permit