What is a bus? What role does the bus play in the power supply and distribution system?

Busbar refers to a product made of copper (copper bar) and aluminum with high conductivity, which is used to transmit electric energy and has the ability to collect and distribute electric power. The main line used to transmit electric energy in a power station or substation. Through it, the electric energy output by generators, transformers or rectifiers is transmitted to various users or other substations.

Function: In the power system, the bus connects all the current-carrying branches in the distribution device together, plays the role of collecting, distributing and transmitting electric energy, and is the main conductor for transmitting electric energy in power stations or substations.

Because there is huge electric energy passing through the bus in operation, it bears huge heating and electrodynamics effect when it is short-circuited. Therefore, the bus material, cross-sectional shape and cross-sectional area must be reasonably selected to meet the requirements of safe and economic operation.

Extended data

First, according to the appearance and structure, buses can be roughly divided into the following three categories:

1. Hard bus: including rectangular bus, circular bus and tubular bus.

2. Flexible bus: including aluminum stranded wire, copper stranded wire, steel-core aluminum stranded wire and expanded hollow conductor.

3. Closed bus: including * * * box bus and split-phase bus.

Two, according to the structure of public transport is divided into hard bus and soft bus. Hard bus is divided into rectangular bus and tubular bus. ?

1, rectangular bus is generally used from the main transformer to the distribution room. Its advantages are convenient construction and installation, small operation change, large current carrying capacity, but high cost.

2. Flexible bus is used outdoors. Because of the large space, the wires will swing, which will not cause insufficient distance between wires. Flexible bus has simple structure and low cost.

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