Substation is an important part of power system, which directly affects the safety and economic operation of the whole power system, and is the intermediate link between power plant and user, which plays the role of transforming and distributing electricity. Electrical main wiring is the main link of power plant substation, the formulation of electrical main wiring is directly related to the choice of electrical equipment, distribution device layout, relay protection and determination of electric device, is the substation electrical part of the investment size of the decisive factor. Substations assemble equipment to cut, switch on, change, or adjust voltages. In the system, the substation becomes a set node for transmission and distribution.
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