Change the voltage of the place. In order to transmit the electric energy from the power plant to a far place, the voltage must be increased to high voltage, and then the voltage should be reduced as needed near the user. This kind of voltage lifting work is completed by the substation. The main equipment of the substation is switches and transformers.
According to the size of different, small called substation. The substation is larger than the substation. Substation: generally a step-down substation with a voltage level below 110KV; substation: including "step-up and step-down" substations with various voltage levels.
Substation is a power system in the transformation of voltage, accept and distribute electrical energy, control the flow of power and adjust the voltage of the power facilities, it through its transformer will be linked to the power grid at all levels of voltage. Substation in a specific environment; is the AC-DC-AC conversion process. Like submarine transmission cables and long-distance transmission. Some use the form of high voltage DC transmission and transformation. DC transmission overcomes the capacitive loss of AC transmission. With energy saving effect.
Substation is mainly high voltage substation medium voltage, or high voltage substation low level high voltage, substation occupies a larger area, according to different voltage levels and different capacity, so some people will call it transformer station.
From the perspective of power supply economy, the substation should be close to the load center. From the production point of view, the transformation and distribution station should not hinder the production and factory transportation, and the transportation of the equipment of the transformation and distribution station itself should also be convenient. From a safety point of view, the substation should avoid flammable and explosive places. The substation should be located at the windward side of the unit. In the enterprise, it is not easy to be located in the place where dust and fiber are easily deposited. The substation shall not be located in crowded places. The site selection and construction of the substation should also take into account the requirements of fire fighting, corrosion prevention, pollution prevention, waterproofing, rain prevention, snow prevention, shock prevention and prevention of small animals from entering.
