Abstract:The main electrical wiring of power station refers to the circuit composed of high-voltage electrical equipment through wiring to receive or distribute electric energy. Its form is closely related to the operation reliability, flexibility and economy of the whole power system and substation, and has a great influence on the selection of electrical equipment, the layout of distribution equipment, the formulation of relay protection and control mode. Therefore, the main wiring design is a comprehensive problem, which is closely related to the power system, hub conditions, kinetic energy parameters of the power station and the reliability and economy of the operation of the power station. Therefore, according to the development requirements of the power system, the position, nature, scale and characteristics of the electrical equipment of the power station in the system should be emphatically analyzed to make the economic and reasonable main wiring in line with the actual needs. The primary electrical design of each system of the power station meets the requirements of regulations, specifications and operation. The design is reasonable, the wiring is simple and clear, the maintenance is convenient and simple, and the operation is reliable. Because the power station is a type of power station behind the dam, in order to reduce the civil engineering and save investment, on the premise of meeting the requirements of regulations and specifications, the layout of mechanical and electrical equipment of the power station is continuously optimized, and the Certain economic benefits.