The electric power industry is an industrial sector that converts primary energy such as coal, oil, natural gas, nuclear fuel, water energy, ocean energy, wind energy, solar energy and biomass energy into electric energy through power generation facilities, and then provides energy to users through power transmission. The industrial sector that produces, delivers, 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, so unified scheduling and distribution are needed. The power industry provides basic power for Industry and other sectors of the national economy, and then builds a number of large and medium-sized hydropower stations in areas where conditions permit, which is the leading sector of the national economic development.