Device and method for realizing automatic bus transferring actions of three-wire three-change enlarged inner bridge wiring transformer substation

Abstract

The invention discloses a device and a method for realizing automatic bus transferring actions of a three-wire three-change enlarged inner bridge wiring transformer substation. The device mainly comprises three power circuits L1, L2 and L3, three transformers which comprise a first transformer, a second transformer and a third transformer respectively, three buses which comprise a first bus, a second bus and a third bus, and breaker switches 1DL to 5DL. According to the device and the method for realizing automatic bus transferring actions of the three-wire three-change enlarged inner bridge wiring transformer substation disclosed by the invention, simple and practical logic of the automatic bus transferring actions can be realized, the action reliability is higher than that of a traditional inner bridge wiring single automatic bus transferring device, and conditions of refused actions and false actions of the automatic bus transferring device can be prevented effectively.

Description

technical field [0001] The invention relates to the field of power system protection, in particular to a device and a method for realizing the self-initiating operation of three-wire three-transformer expanded inner-bridge substation equipment. Background technique [0002] The action logic of the traditional two-line with two transformers internal bridge connection substation backup automatic switching is very mature. According to the operation mode of the substation, it is divided into bridge backup automatic switching or incoming line backup automatic switching. [0003] With the increase of urban electricity load, the scale of substation transformers with inner bridge connections is becoming more and more difficult to meet the electricity demand of the load. Therefore, it is necessary to transform the substation of the inner bridge connection. According to the actual project, the transformation form can be two lines with three transformers or three wires with three tran...

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Problems solved by technology

[0004] At present, there are actual operating experience and literature on the operation logic of the extended inner bridge connection substation with two lines and three transformers, but it is difficult to realize the action logic of the three lines and three transformers expanded inner bridge connection substation.

The major manufacturers of standby automatic switching devices in China do not have a unified standard for the action logic of the three-wire three-transformer expansion of the internal bridge connection.

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