Classification of substations

Classification of substations: 1: According to the classification of functions, there are: step-up substation, step-down substation or hub substation, terminal substation, etc. 2: Classified according to the management style, there are: manned substations and unattended substations. 3: According to the structure of indoor and outdoor substation, there are: outdoor substation, indoor substation. 4: According to geographical conditions, there are: above-ground substation and underground substation. [1] 　The main equipment composition and connection method of the substation will vary according to its function and environment.

The term definitions specified in the national standard GB50053-94 "10kv and below Substation Design Specification", according to the transformer installation location and environment, from indoor and outdoor, indoor and outdoor, the substation is defined as:

Substation: "The AC power source of 10 kV and below is transformed by the power transformer to supply power to the electrical equipment." The substation is the one that meets this requirement.

Open-air substation: a substation whose transformer is located above the open ground;

Semi-outdoor substation: a substation where the transformer is located above the open ground, but there is a roof or overhang above the transformer;

Attached substation: one or several walls of the substation are shared with the walls of the building, and the doors and ventilation windows of the transformer room open to the outside of the building;

Substation in the workshop: a substation located inside the workshop, and the door of the transformer room opens into the workshop;

Independent substation: an independent building;

Indoor substation: the general term for attached substations, independent substations and substations in the workshop;

Oil storage tank: a facility where the oil will not be burned by externally burned substances after the oil flows in;

Oil retaining facilities: facilities that prevent burning oil from spilling.

In addition, the country’s definitions of other terms include:

Terminal substation: A separately built terminal substation is the first substation at the front end of the electricity user or user. The electricity from the substation can be directly supplied to the user’s electrical equipment without the need to go through the transformation again. Pressed. Usually refers to the last-stage substation that is stepped down from 10kV to 380V.

Pole-mounted substation: An outdoor substation installed on one or more poles.

Pre-installed substation (station): a complete set of equipment pre-installed and type tested, usually composed of high-voltage power distribution devices, transformers, and low-voltage power distribution devices, combined in one or several boxes. Also referred to as "box change" for short.

For example: In some rural areas of our country, residents use electricity and use two poles (or desktop) to build transformer substations. This is not only a small and easy-to-install "open-air substation", but also a "pole-mounted substation". “Substation” is also a “terminal substation”.