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A Relay Protection Method for Traction Network with Multi-stage Opening and Closing Stations in Series

A relay protection and switching station technology, applied in emergency protection circuit devices, electrical components and other directions, can solve the problems of multiple levels of multi-level switching protection, long tripping time, etc., to shorten the tripping time, low cost, realize easy effect

Active Publication Date: 2022-05-24
CHINA RAILWAYS CORPORATION +1
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  • Summary
  • 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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  • A Relay Protection Method for Traction Network with Multi-stage Opening and Closing Stations in Series
  • A Relay Protection Method for Traction Network with Multi-stage Opening and Closing Stations in Series
  • A Relay Protection Method for Traction Network with Multi-stage Opening and Closing Stations in Series

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Embodiment Construction

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

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

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

[0076]

[0077] 1. Substation feeder protection setting calculation

[0078] distance I

[0079] Reactance setting: set according to the protection range not exceeding the level 1 opening and closing, see formula (1)

[0080]

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Abstract

The invention discloses a relay protection method for a traction network connected in series with multi-level switching stations. The traction network is powered by a traction substation and an n-level switching station in series, and the feeder line of the traction substation is connected with the switching stations of each level. Both line and feeder are equipped with circuit breakers; respectively carry out protection setting calculations for the feeder line of the substation, the incoming line of the switching station, the feeder line of the first n‑1 level switching station and the feeder line of the nth level switching station; and then protect according to the corresponding calculation results configuration. The invention can reduce the number of protection stages and shorten the tripping time; it has the characteristics of low cost, easy realization and the like.

Description

technical field [0001] The invention belongs to the field of power supply protection of power grids, and in particular relates to a relay protection method for traction networks connected in series by multi-level switching. Background technique [0002] In railway junction 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 open and close expansion feeders to supply power, which makes the structure of the traction network increasingly complex, and the relay protection With the increase of the number of cooperation stages, the protection quickness is not easy to meet. [0003] For the protection of the traction network connected in series with multi-level switches, in current engineering applications, circuit breakers are mainly installed at the feeders of traction substations, the incoming lines and feeders of a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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