Medium-voltage auxiliary power wiring circuit

A plant power and power wiring technology, which is applied in the medium-voltage plant power wiring circuit and electric power field, can solve the problems of increased fault frequency and complex wiring of electric transformers, reduce accident rates, simplify plant power wiring, and facilitate shutdown Effect

Pending Publication Date: 2019-07-30
国电建投内蒙古能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the prior art, the wiring in the medium-voltage substation power circuit is complicated, which increases the fault frequency of the high-voltage substation power transformer

Method used

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  • Medium-voltage auxiliary power wiring circuit

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Embodiment 1

[0028] first, figure 1 It shows a medium-voltage power supply wiring circuit provided by the embodiment of the present invention; as figure 1 As shown, Embodiment 1 provides a medium-voltage utility power wiring circuit, including:

[0029] The medium-voltage plant power system includes two units, namely the first unit 1 and the second unit 2, and two sections of medium-voltage working busbars are set up for each unit, of which the first unit 1 is equipped with two sections of medium-voltage working busbars 10A, 10B, the second unit 2 is equipped with two sections of medium-voltage working busbars 20A and 20B, and two sections of medium-voltage common busbars 01A and 01B are set up for the first unit 1 and the second unit 2, of which 01A is drawn from the first unit 1 medium-voltage working bus The busbars 10B and 01B are led from the medium-voltage working busbar 20B of the second unit 2, and the common busbar 01A and the common busbar 01B are provided with a tie switch and ...

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Abstract

The invention discloses a medium-voltage auxiliary power wiring circuit. The medium-voltage auxiliary power wiring circuit comprises two units, wherein the two units are a first unit and a second unitrespectively, each unit comprises two medium-voltage working buses, only one standby transformer is arranged for the two units, the standby transformer is symmetrically and separately connected to auxiliary working buses of the two units, and the first unit and the second unit are connected with one high-voltage auxiliary transformer respectively; and two medium-voltage common buses are connectedto the two medium-voltage working buses of each unit respectively, a single column of configuration fans in a medium-voltage auxiliary power system are all connected into one of the two medium-voltage working buses in each unit, and unit loads in the medium-voltage auxiliary power system are allocated and connected to the medium-voltage working buses in each unit. According to the circuit, only one standby transformer with the same capacity as the unit high-voltage auxiliary transformer is arranged for the two units; and through the arrangement of the single large-capacity high-voltage auxiliary transformer with split windings, auxiliary power wiring can be simplified, the accident rate of the high-voltage auxiliary transformer is lowered, and therefore a transformer site layout is simpleand clear.

Description

[0001] Technical field: [0002] The invention relates to the field of electric power, in particular to the field of medium-voltage plant power wiring circuits. [0003] Background technique: [0004] In the prior art, the power load configuration of the medium-voltage power plant in the power plant is as follows: the electric feed water pump is a starter pump, and there is one set for the two units; the condensate pump and the closed cooling water circulation pump are two sets, one for operation and one for standby; Coal mills are transported in five ways and prepared; primary fan, blower fan and induced draft fan are all configured in a single row; other loads such as auxiliary circulating water pumps, air compressors, rainwater pumps, and belt conveyors are public loads. [0005] After the primary fan, blower fan, and induced draft fan are configured in a single row, from the perspective of process flow, when the unit is running, the three major fans in a single row need to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/04
CPCH02J3/04
Inventor 顾玉春刘文亮俞基安蔡利军王新宁麦永强贾潇鸿李文辉陈淑云弓建国崔志成刘东吴德利吴真乔固
Owner 国电建投内蒙古能源有限公司
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