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Fault location measurement method in traction power supply system feeder circuit breaker 1 belt 2 mode

A technology of traction power supply system and feeder circuit breaker, which is applied in the direction of fault location, information technology support system, fault detection according to conductor type, etc., to achieve the effect of ensuring rapid restoration of power supply

Active Publication Date: 2021-12-07
CHENGDU SOUTHWEST JIAOTONG UNIV XUJI ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a fault location method in the mode of feeder circuit breaker 1 with 2 in the traction power supply system. To solve the technical problem that the fault cannot be realized by calculating the target, this method takes the AT station as the perspective, that is, the AT station is the starting measurement point, the direction from the AT station to the substation is the fault target direction, and the current ratio of the AT station is used as the target. Calculate the fault distance based on the current ratio principle, so as to solve the problem of sharing a feeder circuit breaker for substation uplink and downlink, and provide a new and ingenious conception of distance measurement for fault measurement

Method used

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  • Fault location measurement method in traction power supply system feeder circuit breaker 1 belt 2 mode
  • Fault location measurement method in traction power supply system feeder circuit breaker 1 belt 2 mode
  • Fault location measurement method in traction power supply system feeder circuit breaker 1 belt 2 mode

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Embodiment 1

[0054] Such as figure 1 , figure 2 as shown,

[0055] The fault location method in the feeder circuit breaker 1 belt 2 mode of the traction power supply system, when the feeder circuit breaker 1 belt 2 mode of the traction power supply system, the uplink and downlink lines of the substation share one feeder circuit breaker, the fault The ranging method includes the following steps:

[0056] Step S1: determine the area where the current faulty section is located, and if the area where the current faulty section is located is between the substation and the AT station, then execute step S2;

[0057] Step S2: Taking the current ratio of the AT station as the target, the fault distance is calculated using the principle of the upstream and downstream current ratio, and the fault distance l is calculated by formula (1):

[0058]

[0059] In formula (1), I KX0 is the total feeder current of the substation, I KX1 is the feeder current of AT, D 0 is the distance from the subst...

Embodiment 2

[0070] On the basis of the above embodiments, further, if the present invention does not use the feeder current I KX2 For the total feeder current I of the substation KX0 Amendment, then through actual experiment of the present invention, can measure error in 300m when generally measuring fault distance, and adopt the feeder current I of partition by above-mentioned KX2 For the total feeder current I of the substation KX0 Make corrections, i.e. use I KX0 -IKX2 Calculated as the denominator such that I KX0 If it is corrected, then through the actual experiment of the present invention, the measurement error can be within 100m when generally measuring the fault distance. Therefore it can be seen that, for the present invention, promptly can adopt I KX0 Without correcting the calculation, the feeder current I of the partition can also be used KX2 For the total feeder current I of the substation KX0 Perform correction calculations. But the latter has a higher measurement ac...

Embodiment 3

[0073] On the basis of the above-mentioned embodiment 1, preferably, in order to visualize the above-mentioned theory, the present invention provides the following two specific situations:

[0074] Such as figure 1 , image 3 As shown, Situation 1: Take the circuit breaker 1QF off and the circuit breaker 2QF on in the substation as an example:

[0075] The uplink and downlink feeder circuit breakers of the substation share one feeder circuit breaker specifically: a common line branch is used between the substation and the AT station to conduct the uplink feeder and downlink feeder, and a disconnector QS0 is set on the common line branch. When the uplink and downlink of the substation share one feeder circuit breaker, the circuit breaker 1QF of the substation is opened, the circuit breaker 2QF is closed, the isolating switch QS0 of the common line branch is closed, and the circuit breaker 3QF, circuit breaker of the AT station 4QF, isolating switch QS1 close; circuit breaker ...

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Abstract

The invention discloses a fault distance measuring method in the mode of 1 with 2 feeder circuit breakers in a traction power supply system. The mode of 1 with 2 feeder circuit breakers in the traction power supply system is: the uplink and downlink of a substation share one feeder circuit breaker; The method for fault distance measurement includes the following steps: S1 step: collect the data of the AT station and the partition station, and then judge whether the current fault section is between the substation and the AT station or between the AT station and the partition according to the data of the AT station and the partition station Between substations; Step S2: If the current fault section is between the substation and the AT station, the fault distance is calculated using the uplink and downlink current ratio principle, and the fault distance l is calculated using formula (1):

Description

technical field [0001] The invention relates to railway distance measurement, and mainly relates to a fault distance measurement method in a traction power supply system feeder circuit breaker 1 belt 2 mode. Background technique [0002] In today's highly developed economy, the railway is moving towards high-speed and heavy-duty direction, and the construction of high-speed railway is in line with the needs of my country's economic development and national conditions. The high-speed railway must adopt electric traction, and the power supply system is an important part of the electrified railway, so the choice of its power supply mode becomes one of the key factors in the development of high-speed railway. With its own advantages, the AT power supply method has been widely used in France, Japan and other countries, and it has also attracted more and more attention from my country's railway departments. [0003] my country's high-speed railway power supply traction network ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCG01R31/086G01R31/088Y04S10/52
Inventor 周小金葛海波范红疆刘晃万宇周宇彭绿萍
Owner CHENGDU SOUTHWEST JIAOTONG UNIV XUJI ELECTRIC