CN103823155A - AT traction network short circuit fault distance measurement method - Google Patents

AT traction network short circuit fault distance measurement method Download PDF

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Publication number
CN103823155A
CN103823155A CN201410038859.1A CN201410038859A CN103823155A CN 103823155 A CN103823155 A CN 103823155A CN 201410038859 A CN201410038859 A CN 201410038859A CN 103823155 A CN103823155 A CN 103823155A
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China
Prior art keywords
auxiliary
line
distance
cpw
electric current
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Pending
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CN201410038859.1A
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Chinese (zh)
Inventor
孙建明
何正友
温建民
林圣�
高朝辉
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Southwest Jiaotong University
China Railway Siyuan Survey and Design Group Co Ltd
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Southwest Jiaotong University
China Railway Siyuan Survey and Design Group Co Ltd
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Priority to CN201410038859.1A priority Critical patent/CN103823155A/en
Publication of CN103823155A publication Critical patent/CN103823155A/en
Pending legal-status Critical Current

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Abstract

The invention provides an AT traction network short circuit fault distance measurement method. The method comprises the steps: A, a current sensor is arranged on each auxiliary?connection line CPWn between a protection line and a steel rail; in the case of short circuit, a central controlling and processing unit acquires at once current In of all auxiliary?connection lines measured by the current sensors, the largest auxiliary?connection line current Ik and the second largest auxiliary?connection line current Ik' are found out, k'=k+/-1, and the central controlling and processing unit determines the section between the auxiliary?connection line CPWk and the CPWk' to be the section where a short circuit fault happens; B, the distance X between the short circuit fault position and the auxiliary?connection line CPWk where the largest auxiliary?connection line current Ik is located is found out, in the formula shown in the description, D is the distance between the auxiliary?connection line CPWk and the CPWk'; and finally the distance between the fault and the traction substation can be obtained. According to the method provided by the invention, the traction network short circuit fault position in high speed railway full parallel AT power supply?mode can be quickly and accurately measured, timely maintenance is facilitated, and loss expansion and accident happening can be more effectively avoided.

Description

A kind of AT traction network short circuit fault distance-finding method
Technical field
The present invention relates to a kind of AT traction net fault distance-finding method.
Background technology
Railway traction power supply system adopts AT power supply more, and current supply circuit is mainly made up of osculatory, locomotive, rail, protective wire.High-speed railway develops into full Parallel AT power supply mode on the basis of AT power supply, this kind of power supply mode by up and down line in AT parallel connection of living in, its power supply distance is longer, output power is larger, line construction is more complicated, this just has higher requirement to tractive power supply system fault location device and automation function thereof, requires that selectivity is better, reliability is higher, responsiveness is faster, Fault Identification, judgement, release time be faster.
At present, fault localization for the full Parallel AT power supply mode of China Express Railway has the fault distance-finding method such as " AT neutral point sucts current ratio ", " section up-downgoing current ratio " and " horizontal line current ratio ", the fault localization principle of these fault distance-finding methods all will be subject to the impact of main transformer leakage reactance, AT leakage reactance, the earth leakage, fault localization is only considered take the short-circuit current of an AT section (10~15km) or impedance as fundamental measurement unit, distance accuracy is low, and error is large.On the other hand; traditional full Parallel AT power supply mode fault distance-finding method is not considered impact and the effect of protective wire electric current on fault localization; positional distance positive feeder and the osculatory location comparison of protective wire on pillar is near; at strong wind; bird pest; under the factor impacts such as trees, be easy to cause the short trouble between positive feeder and protective wire; and in existing fault localization scheme, all do not consider this fault localization type; cause osculatory-protective wire fault and positive feeder-protective wire fault cannot realize localization of fault, reduced the safe reliability of tractive power supply system.
Summary of the invention
The object of the invention is to overcome the deficiency of existing railway AT power supply mode short trouble distance-finding method, a kind of new AT traction network short circuit fault distance-finding method is provided, the method can be fast, the position of measuring accurately the short trouble of traction net under AT power supply mode, its abort situation distance accuracy is in 0.75km; Be conducive to keep in repair in time, more effective avoid loss expansion and the generation of accident.
The present invention is for realizing its goal of the invention, and the technical scheme adopting is: a kind of AT traction network short circuit fault distance-finding method, the steps include:
The section of A, judgement short trouble
Every auxiliary connecting line CPW between protective wire and rail n, n=1,2,3 ... N, n is the sequence number of auxiliary connecting line) the upper current transformer of installing;
When short trouble checkout equipment detects traction net while being short-circuited fault, the center-control in traction substation and processing unit gather all auxiliary connecting line CPW that current sensor records immediately nelectric current I n, and find out the auxiliary connecting line electric current I of maximum wherein kwith inferior large auxiliary connecting line electric current I k', k'=k ± 1, wherein k is maximum auxiliary connecting line electric current I kthe sequence number of the auxiliary connecting line in place, k' is time large auxiliary connecting line electric current I k'the sequence number of the auxiliary connecting line in place; Center-control and processing unit judge auxiliary connecting line CPW kwith auxiliary connecting line CPW k'between section be short trouble occur section;
B, abort situation range finding
Walk the maximum auxiliary connecting line electric current I obtaining according to A kwith inferior large auxiliary connecting line electric current I k', obtain short trouble position apart from the auxiliary connecting line electric current I of maximum by following formula kconnecting line CPW is assisted at place kdistance X,
X = D ( I k ′ I k + I k ′ ) ;
In formula, D is auxiliary connecting line CPW kwith auxiliary connecting line CPW k'between distance.
As auxiliary connecting line CPW k'at auxiliary connecting line CPW krear, when k'=k+1, trouble spot is that short trouble position is apart from auxiliary connecting line CPW apart from the distance of traction substation kdistance X and auxiliary connecting line CPW kapart from the distance sum of traction substation;
As auxiliary connecting line CPW k'at auxiliary connecting line CPW kfront, when k'=k-1, trouble spot is that short trouble position is apart from auxiliary connecting line CPW apart from the distance of traction substation kdistance X and auxiliary connecting line CPW kpoor apart from the distance of traction substation.
The short trouble that above-mentioned traction net occurs is osculatory-rail, positive feeder-rail, osculatory-protective wire or positive feeder-protective wire short trouble.
The principle of the inventive method is:
In high-speed railway tractive power supply system, rail and protective wire arrange an auxiliary connecting line CPW every 1.5km n, auxiliary connecting line CPW nbe evenly distributed in each AT section.Rail, protective wire and auxiliary connecting line CPW nimpedance on line is uniformly distributed, meet electric current mean allocation principle, when electric current is infused between the auxiliary connecting line of k root and k+1 root or k root k-1 root, and during near the auxiliary connecting line of k root, the electric current maximum on the auxiliary connecting line of k root, and electric current on the auxiliary connecting line of k'=k ± 1 is time large, the electric current on other auxiliary connecting line is almost nil.
Thereby in the time of osculatory-rail, positive feeder-rail, osculatory-protective wire or the short circuit of positive feeder-protective wire; all there is electric current to inject at the location of short circuit of rail or protective wire; with the electric current maximum on the hithermost auxiliary connecting line of location of short circuit, and electric current on inferior close auxiliary connecting line is time large.The section that so, can draw location of short circuit place is the section between these two auxiliary connecting lines.According to the current value on these two auxiliary connecting lines and the electric current distribution principle of parallel circuit, can further measure the distance of location of short circuit apart from auxiliary connecting line again.Sequence number by the auxiliary connecting line in fault section two ends can be measured the distance of trouble spot apart from traction substation.
When the short circuit of osculatory-positive feeder, on rail or protective wire, no current injects, and also no current flows through auxiliary connecting line naturally, and therefore method of the present invention cannot be found range to this kind of short trouble.
Compared with prior art, the invention has the beneficial effects as follows:
One, can accurately determine traction net position of failure point; current value by all auxiliary connecting lines between rail and protective wire detects; find out the auxiliary connecting line at maximum current, inferior large electric current and place thereof, show that the section at location of short circuit place is the section between these two auxiliary connecting lines.Further measure the distance of location of short circuit apart from auxiliary connecting line according to the current value on these two auxiliary connecting lines again.Because the interval of every two auxiliary connecting lines is between 1~1.5km, the range accuracy of measuring in the half of 1~1.5km, thereby greatly improved the degree of accuracy of fault localization, be convenient to field personnel and repair in time, exactly fault.
Two, because high-speed railway is uniformly-spaced connected with auxiliary connecting line CPW between rail and protective wire, therefore the present invention is particularly useful for high-speed railway, and it is implemented easily, is convenient to promote.
Three, the short trouble to osculatory-rail, positive feeder-rail, osculatory-protective wire or positive feeder-protective wire, all can find range, locate.Overcome the defect that prior art cannot be found range to osculatory-protective wire and positive feeder-protective wire short trouble, there is important society and economic worth.
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the short trouble range measurement principle schematic diagram of embodiment of the present invention method.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment
Fig. 1 illustrates, a kind of embodiment of the present invention is that a kind of AT traction network short circuit fault distance-finding method, the steps include:
The section of A, judgement short trouble
Every auxiliary connecting line CPW between protective wire and rail n, n=1,2,3 ... N, n is the sequence number of auxiliary connecting line) the upper current transformer of installing;
When short trouble checkout equipment detects traction net while being short-circuited fault, the center-control in traction substation and processing unit gather all auxiliary connecting line CPW that current transformer records immediately nelectric current I n, and find out the auxiliary connecting line electric current I of maximum wherein kwith inferior large auxiliary connecting line electric current I k', k'=k ± 1, wherein k is maximum auxiliary connecting line electric current I kthe sequence number of the auxiliary connecting line in place, k' is time large auxiliary connecting line electric current I k'the sequence number of the auxiliary connecting line in place; Center-control and processing unit judge auxiliary connecting line CPW kwith auxiliary connecting line CPW k'between section be short trouble occur section;
B, abort situation range finding
Walk the maximum auxiliary connecting line electric current I obtaining according to A kwith inferior large auxiliary connecting line electric current I k', obtain short trouble position apart from the auxiliary connecting line electric current I of maximum by following formula kconnecting line CPW is assisted at place kdistance X,
X = D ( I k ′ I k + I k ′ ) ;
In formula, D is auxiliary connecting line CPW kwith auxiliary connecting line CPW k'between distance.
As auxiliary connecting line CPW k'at auxiliary connecting line CPW krear, when k'=k+1, trouble spot is that short trouble position is apart from auxiliary connecting line CPW apart from the distance of traction substation kdistance X and auxiliary connecting line CPW kapart from the distance sum of traction substation;
As auxiliary connecting line CPW k'at auxiliary connecting line CPW kfront, when k'=k-1, trouble spot is that short trouble position is apart from auxiliary connecting line CPW apart from the distance of traction substation kdistance X and auxiliary connecting line CPW kpoor apart from the distance of traction substation.
The short trouble that traction net in the example method occurs is osculatory-rail, positive feeder-rail, osculatory-protective wire or positive feeder-protective wire short trouble.
Emulation experiment
For verifying accuracy of the present invention, adopt the example method to carry out following emulation experiment:
Emulation experiment setting parameter is: AT traction net supply arm comprises 2 AT sections, and each ATDuan road length is 15km, and the distance of adjacent boost line is 1.5km.Impedance of traction electric network parameter is: osculatory impedance Z t=0.1726+j0.609237, rail impedance Z r=0.094348+j0.449327, positive feeder impedance Z f=0.309641+j0.72702, osculatory and rail transimpedance Z t-R=0.05+j0.3163, osculatory and positive feeder transimpedance Z t-F=0.0489+j0.327712, rail and positive feeder transimpedance Z r-F=0.0484+j0.2849, AT leakage impedance is AT1:Z g=0.2+j0.9, AT2:Z g=0.2+j0.9.Experimental simulation osculatory-rail fault and osculatory-protective wire fault.
Table 1 is the fault localization result of emulation experiment.
Table 1
The range finding result of table 1 shows, the present invention can realize more accurate short trouble range finding.

Claims (2)

1. an AT traction network short circuit fault distance-finding method, the steps include:
The section of A, judgement short trouble
Every auxiliary connecting line CPW between protective wire and rail nupper installation current transformer H n, wherein n is the sequence number of auxiliary connecting line, n=1, and 2,3 ... N;
When short trouble checkout equipment detects traction net while being short-circuited fault, the center-control in traction substation and processing unit gather each current transformer H immediately non the auxiliary connecting line CPW that records non auxiliary connecting line electric current I n, and find out wherein maximum auxiliary connecting line electric current I kwith inferior large auxiliary connecting line electric current I k',, center-control and processing unit judge auxiliary connecting line CPW kwith auxiliary connecting line CPW k'between section be short trouble occur section; Wherein k is maximum current I kcorresponding auxiliary connecting line CPW n=ksequence number, k' is time large electric current I k'corresponding auxiliary connecting line CPW n= k'sequence number, k'=k ± 1;
B, abort situation range finding
Walk the maximum auxiliary connecting line electric current I obtaining according to A kwith inferior large auxiliary connecting line electric current I k', obtain short trouble position apart from the auxiliary connecting line electric current I of maximum by following formula kcorresponding auxiliary connecting line CPW kdistance X,
X = D ( I k ′ I k + I k ′ ) ;
In formula, D is auxiliary connecting line CPW kwith auxiliary connecting line CPW k'between distance;
As auxiliary connecting line CPW k'at auxiliary connecting line CPW krear, when k'=k+1, trouble spot apart from the distance of traction substation is: short trouble position is apart from auxiliary connecting line CPW kdistance X and auxiliary connecting line CPW kapart from the distance sum of traction substation;
As auxiliary connecting line CPW k'at auxiliary connecting line CPW kfront, when k'=k-1, trouble spot apart from the distance of traction substation is: short trouble position is apart from auxiliary connecting line CPW kdistance X and auxiliary connecting line CPW kpoor apart from the distance of traction substation.
2. a kind of AT traction network short circuit fault distance-finding method according to claim 1, is characterized in that: the short trouble that described traction net occurs is osculatory-rail, positive feeder-rail, osculatory-protective wire or positive feeder-protective wire short trouble.
CN201410038859.1A 2014-01-27 2014-01-27 AT traction network short circuit fault distance measurement method Pending CN103823155A (en)

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Cited By (10)

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CN104316831A (en) * 2014-10-08 2015-01-28 成都交大许继电气有限责任公司 AT suck current rate fault location parameter project determining method
RU2609727C1 (en) * 2015-09-24 2017-02-02 Федеральное Государственное Бюджетное Образовательное Учреждение Высшего Профессионального Образования "Ростовский Государственный Университет Путей Сообщения" Method of determining distance to catenary system failure point (versions)
CN106443354A (en) * 2016-11-03 2017-02-22 中铁电气化局集团有限公司 High-speed rail line fault distance measuring method and system
CN104316832B (en) * 2014-10-08 2017-04-05 成都交大许继电气有限责任公司 Suitable for the tractive power supply system fault distance-finding method of various methods of operation
CN107797027A (en) * 2017-10-16 2018-03-13 西南交通大学 A kind of electric railway AT draws network fault positioning method
CN108548991A (en) * 2018-03-20 2018-09-18 西南交通大学 A kind of fault distance-finding method of single line electric railway direct-furnish Traction networks
CN109188209A (en) * 2018-09-29 2019-01-11 江苏新绿能科技有限公司 AT power supply mode contact net ground fault recognition method
CN110082648A (en) * 2019-06-19 2019-08-02 成都交大许继电气有限责任公司 A kind of T connects the fault distance-finding method of Traction networks
CN110221181A (en) * 2019-07-02 2019-09-10 西南交通大学 A kind of AT sections of full Parallel AT tractive power supply system failure short-circuit independent positioning methods
CN111579925A (en) * 2020-05-21 2020-08-25 西南交通大学 Positive rail ground fault positioning method of fourth rail backflow traction power supply system

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104316831A (en) * 2014-10-08 2015-01-28 成都交大许继电气有限责任公司 AT suck current rate fault location parameter project determining method
CN104316832B (en) * 2014-10-08 2017-04-05 成都交大许继电气有限责任公司 Suitable for the tractive power supply system fault distance-finding method of various methods of operation
RU2609727C1 (en) * 2015-09-24 2017-02-02 Федеральное Государственное Бюджетное Образовательное Учреждение Высшего Профессионального Образования "Ростовский Государственный Университет Путей Сообщения" Method of determining distance to catenary system failure point (versions)
CN106443354A (en) * 2016-11-03 2017-02-22 中铁电气化局集团有限公司 High-speed rail line fault distance measuring method and system
CN106443354B (en) * 2016-11-03 2019-02-19 中铁电气化局集团有限公司 A kind of high-speed rail circuit fault distance measurement and fault localization system
CN107797027A (en) * 2017-10-16 2018-03-13 西南交通大学 A kind of electric railway AT draws network fault positioning method
CN108548991A (en) * 2018-03-20 2018-09-18 西南交通大学 A kind of fault distance-finding method of single line electric railway direct-furnish Traction networks
CN109188209A (en) * 2018-09-29 2019-01-11 江苏新绿能科技有限公司 AT power supply mode contact net ground fault recognition method
CN110082648A (en) * 2019-06-19 2019-08-02 成都交大许继电气有限责任公司 A kind of T connects the fault distance-finding method of Traction networks
CN110082648B (en) * 2019-06-19 2021-04-06 成都交大许继电气有限责任公司 Fault location method for T-connection traction network
CN110221181A (en) * 2019-07-02 2019-09-10 西南交通大学 A kind of AT sections of full Parallel AT tractive power supply system failure short-circuit independent positioning methods
CN111579925A (en) * 2020-05-21 2020-08-25 西南交通大学 Positive rail ground fault positioning method of fourth rail backflow traction power supply system

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Application publication date: 20140528