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Relay protection method for multi-stage switching station series traction network

A technology of relay protection and switching station, which is applied in the direction of emergency protection circuit devices and electrical components, can solve the problems of multi-level switching protection stages and long tripping time, and achieve shortening tripping time, low cost, and reduced The effect of protection levels

Active Publication Date: 2020-09-25
CHINA RAILWAYS CORPORATION +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to better solve the problems of many protection stages and long tripping time of multi-level switching stations in current engineering applications, the present invention provides a relay protection method for multi-level switching stations in series traction network

Method used

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  • Relay protection method for multi-stage switching station series traction network
  • Relay protection method for multi-stage switching station series traction network
  • Relay protection method for multi-stage switching station series traction network

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Embodiment Construction

[0073] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0074] A kind of relay protection method of multi-level switching station series traction network of the present invention, the traction network is powered by traction substation and n-level switching station in series, the schematic diagram of power supply is as follows figure 1 shown. The feeder of the traction substation and the incoming line and feeder of the switching stations at all levels are equipped with circuit breakers, and the corresponding protection functions are configured according to Table 1.

[0075] Table 1 Protection configuration of traction network powered by n-level switchgear

[0076]

[0077] 1. Setting calculation of substation feeder protection

[0078] Distance I section

[0079] Reactance fixed value: set according to the protection range not exceeding level 1 switch, see formula (1)

[0080]

[...

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Abstract

The invention discloses a relay protection method for a multi-stage switching station series traction network. The traction network is powered by a traction substation and n stages of switching stations in series, and circuit breakers are arranged on a traction substation feeder line and an incoming line and a feeder line of each stage of switching station, the protection setting calculation is separately carried out on the substation feeder line, the switching station incoming lines, the first (n-1)-stage sof switching station feeder lines and the nth-stage switching station feeder line, andthe configuration is protected according to a corresponding calculation result. According to the invention, the protection stages can be reduced, and the tripping time is shortened, and the method hasthe characteristics of being low in cost and being simple and convenient to realize.

Description

technical field [0001] The invention belongs to the field of electric network power supply protection, and in particular relates to a relay protection method for a traction network connected in series with multi-level switches. Background technique [0002] In railway hub areas, large stations and the introduction of railway branch lines, due to the large number of power supply units, in order to improve the flexibility and reliability of power supply, it is usually necessary to set up switching stations to expand feeders to supply power, which makes the traction network structure increasingly complex and relay protection With the increase of the number of coordination series, the quickness of protection is not easy to satisfy. [0003] For the protection of the multi-level switchgear series traction network, in the current engineering application, circuit breakers are respectively installed at the feeder line of the traction substation, the incoming line of each level switc...

Claims

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Application Information

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IPC IPC(8): H02H7/26
CPCH02H7/262
Inventor 韩正庆何宗伦沈睿马战磊
Owner CHINA RAILWAYS CORPORATION
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