1) A wiring type

Substation wiring refers to the transmission lines and all electrical equipment (transformers, incoming and outgoing switches, etc.) entering the substation. ) are interrelated. Its cable scheme includes: line transformer, bridge connection, single bus, single bus, double bus, two buses, power supply ring, etc.

2) Transformer group line

There are only two ways of substation: incoming line and transformer, but in the case of no longer wiring, the wiring mode of incoming line transformer is developed.

3) Bridge cable

There are two incoming lines, two transformers, but there is no development, and one bridge connection. For transformers, the two incoming circuit breakers are in-bridge contact circuit breakers, and the two incoming circuit breakers are off-bridge contact circuit breakers.

4) Single bus

Multi-incoming substation, single bus, has two incoming lines, one for power supply and the other for standby (different power supply at the same time). They can use equipment as power supply for each other, and multiple outgoing lines are led out by a bus.

5) Subbus

There are more than two incoming lines, multiple outgoing lines, and bus selection. The two incoming lines are connected to two buses respectively, and the two buses are connected by a bus switch. Chu Xian was connected to the car.

There are more sub-bus operation modes. Zhu Gong mode is universal, with one standby (not switching on) and bus coupler. When Zhu Gong loses power all the way, it is standby all the way, and Zhu Gong bus coupler is standby and interlocked. Miller's standby power supply capacity, the last standby power supply, disconnect some. This is a common mode of operation.

For particularly important loads, both lines are incoming lines of Zhu Gong Road, and the bus coupler switch is turned off. When the incoming line of one line is power supply, the bus coupler switch will turn forward after the bus coupler switch is turned off.

Bus-splitting is also beneficial to the internal maintenance of the substation. When overhauling, a section of bus is stopped. If it is not a bus-splitting, the whole station will be blacked out during overhaul, and the bus can not be blacked out by bypass. The bypass bus can only be used for power supply of the substation system.

6) Double bus

Double busbars are mainly used in large power plants and substations, and each circuit breaker is connected to the busbar by two last two disconnectors, so when the busbar is overhauled, the lines can be connected to one busbar in reverse with the disconnectors. There are two types of secondary bus: segmented bus and non-segmented bus. The secondary bus is equipped with bypass circuit breaker, which has complicated wiring, but it is very convenient to maintain and can reduce the power outage range.