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A distributed optical fiber differential protection system suitable for high-speed railway

A technology of distributed optical fiber and vertical differential protection, which is applied in the direction of emergency protection circuit devices, circuit devices, electrical components, etc., can solve the problems of system power supply interruption, traction power supply reliability and flexibility impact, and achieve compressed fault stop time, Reduced power outage range and high reliability

Active Publication Date: 2018-05-29
CHENGDU SOUTHWEST JIAOTONG UNIV XUJI ELECTRIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the fully parallel AT power supply mode is applied, any component failure will cause the system power supply to be interrupted, which will seriously affect the reliability and flexibility of the traction power supply

Method used

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  • A distributed optical fiber differential protection system suitable for high-speed railway
  • A distributed optical fiber differential protection system suitable for high-speed railway
  • A distributed optical fiber differential protection system suitable for high-speed railway

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Embodiment

[0026] Such as figure 1 and figure 2 As shown, a distributed optical fiber longitudinal differential protection system suitable for high-speed railways includes a microcomputer protection device, a circuit breaker, a current transformer, and a voltage transformer installed at the head and end of each line in the catenary. The circuit breakers, current transformers and voltage transformers at the head end of each section of the catenary are connected to the microcomputer protection device installed at the head end of the line, and the circuit breakers, current transformers and voltage transformers installed at the end of each section of the catenary line The devices are all connected to the microcomputer protection device installed at the end of the line. The microcomputer protection device installed at the head end of each line of the catenary and the microcomputer protection device installed at the end of the line are connected by two optical fiber cables, and they are install...

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Abstract

The invention discloses a distributed optical fiber differential protection system suitable for high-speed railways, which includes a microcomputer protection device, a circuit breaker, a current transformer and a voltage transformer arranged at the head end and end of each line in the catenary, wherein, The circuit breaker, current transformer and voltage transformer are all connected to the microcomputer protection device. The microcomputer protection device installed at the head end of each line of the catenary line is connected to the microcomputer protection device at the end of the line through two optical fiber cables, and is set at The microcomputer protection devices, circuit breakers, current transformers and voltage transformers at the head and end of each line of the catenary constitute a differential protection element. The invention also discloses the longitudinal difference protection method of the distributed optical fiber longitudinal difference protection system suitable for high-speed railways. When the invention is applied, the reliability and flexibility of the power supply can be guaranteed, and furthermore, the requirement of the high-speed railway on the traction power supply capacity can be met.

Description

Technical field [0001] The invention relates to the field of electrified railways, in particular to a distributed optical fiber longitudinal differential protection system and method suitable for high-speed railways. Background technique [0002] At present, my country's high-speed railways generally use the fully parallel AT power supply mode, which can significantly improve the power supply capacity and realize the electrical parallel relationship between the uplink and downlink traction networks. However, when the fully parallel AT power supply mode is applied, any component failure will cause the system power supply to be interrupted, which has a serious impact on the reliability and flexibility of the traction power supply. Summary of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the prior art, and provide a distributed optical fiber longitudinal differential protection system and method suitable for high-speed railways. The ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26H02J13/00
Inventor 葛海波陈元寿张相志庄晓明
Owner CHENGDU SOUTHWEST JIAOTONG UNIV XUJI ELECTRIC
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