CN109901018A - A kind of fault distance-finding method and system suitable for high-speed railway sectional power supply mode - Google Patents
A kind of fault distance-finding method and system suitable for high-speed railway sectional power supply mode Download PDFInfo
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Abstract
The invention discloses a kind of fault distance-finding methods and system suitable for high-speed railway sectional power supply mode; fault localization system includes using each institute's pavilion as the sectionalised protection device of the boundary sectionalised protection section two sides setting of sectionalised protection section, and the sectionalised protection device is for judging fault point distance, fault type and fault direction；Fault distance-finding method is that the corresponding sectionalised protection device in section route two sides judges fault type and fault direction；The corresponding sectionalised protection device in fault section route two sides calculates fault point distance based on the current value at tripping moment.The present invention calculates the position of fault point merely with the current value of each conducting wire of leading-out terminal in the sectionalised protection Tripping data of guilty culprit section two sides, and can determine fault type and fault direction, realizes the fault localization of sectional power supply mode.
Description
Technical field
The invention belongs to high-speed railway traction power supply technical fields, and in particular to one kind is suitable for high-speed railway sectional power supply
The fault distance-finding method and system of mode.
Background technique
In recent years, Chinese Railway construction investment is growing, and newly built railway construction is mainly built with High-speed Passenger Dedicated Lines
It is set as main, the power supply system of high-speed railway Traction networks generally uses all-parallel AT traction system mode, which has conveying function
The advantages that rate is big, power supply distance is long, the contact net loss of voltage is low, strong antijamming capability, this greatly improves the fortune of the railway system
Movement Capabilities, and guarantee therefore power supply reliability also becomes more important, the normal power supply of electric railway traction net is to ensure iron
The premise of road transport row.
Under all-parallel AT traction system mode, traction substation, auto-transformer (auto-transformer, AT) institute and point
Area respectively forms an independent protection system, by AT and subregion locating for uplink and downlink parallel connection improve network pressure, power
Arm is divided into uplink section I and downlink section II, as shown in Figure 1.Sectional power supply mode based on all-parallel AT traction system mode, with
Demarcate carried out by AT unit, traction power supply arm is divided into multiple uplink and downlinks and is powered section, as shown in Fig. 2, thus being avoided that contact net is short
Traction substation uplink and downlink breaker trips simultaneously when road, improves the selectivity of relay protection.It is directed to sectional power supply side at present
The fault localization scheme of formula still continues to use the ranging scheme under original all-parallel AT traction system mode, as unit of supply arm, often
A electric substation, AT institute and the installed fault location device of subregion, and fault point distance is calculated by electric substation, principle is generally adopted
With current ratio method or linear reactance is sucted than method, sucts current ratio method and need for different line adjustment Q ratios, and linear electricity
It is anti-to need to adjust unit reactance value than rule, cause practicability not high.In addition any range unit occurs on same supply arm
Failure then will affect the calculating of fault distance and the judgement of fault type, reduce system reliability of operation.
Summary of the invention
To solve the above problems, the present invention proposes a kind of fault localization side suitable for high-speed railway sectional power supply mode
Method realizes the fault localization of sectional power supply mode.
The present invention adopts the following technical scheme that, a kind of fault distance-finding method suitable for high-speed railway sectional power supply mode,
The following steps are included:
The corresponding sectionalised protection device in fault section route two sides judges fault type and fault direction；
The corresponding sectionalised protection device in fault section route two sides calculates fault point distance based on the current value at tripping moment.
Preferably, the current value filters out the tripping moment using filtering algorithm for fault point two sides institute pavilion leading-out terminal current value
Transient state decay the data that aperiodic DC component obtains.
Preferably, the calculating fault point distance specific method is based on fault point two sides institute pavilion leading-out terminal current value and event
Hinder electric current and fault point distance is calculated by mesh voltage equation.
Preferably, the specific method is as follows for calculating fault point distance:
When being in contact line-rail short trouble between AT institute and subregion institute, AT institute and each conducting wire of subregion institute leading-out terminal
Electric current IT, IF and fault current I relationship it is as follows:
Show that fault localization formula is as follows:
When positive feeder-rail short trouble occurs between AT institute and subregion institute, AT institute and each conducting wire of subregion institute leading-out terminal
Electric current IT, IF and fault current I relationship it is as follows:
Show that fault localization formula is as follows:
When being in contact line-positive feeder short trouble between AT institute and subregion institute, AT institute and subregion institute leading-out terminal are respectively led
Electric current IT, IF of line and the relationship of fault current I are as follows:
Show that fault localization formula is as follows:
Wherein:For electric substation's uplink T line current；For AT institute uplink bus T line current；For in subregion institute
Row bus T line current；For subregion institute Down-link HighWay T line current；For electric substation's uplink F line current；For AT institute
Uplink bus F line current；For subregion institute uplink bus F line current；For subregion institute Down-link HighWay F line current；
For T line current on the left of fault point；For T line current on the right side of fault point；For the short circuit current of fault point；For fault point
Left side F line current；For F line current on the right side of fault point；Electric current is sucted for subregion institute AT auto-transformer；X is failure
Distance of the point apart from previous institute's pavilion；D is the length of section where fault point.
Preferably, the telecommunication management that fault section two sides pass through this institute close to the sectionalised protection device in institute's pavilion of fault point
Machine send fault point distance, fault type and fault direction on dispatching terminal.
The differential starting current for being preferably based on the line sectionalizing protective device of fault point two sides judges fault type and event
Hinder direction.
Preferably, the starting of the corresponding sectionalised protection device in fault section route two sides and trip signal be fault point away from
Enabling signal from calculating.
A kind of fault localization system suitable for high-speed railway sectional power supply mode, comprising: using each institute's pavilion as sectionalised protection
Section boundary sectionalised protection section two sides setting sectionalised protection device, the sectionalised protection device for judge fault point away from
From, fault type and fault direction.
Preferably, further include each pavilion in communication processor, the communication manager is for giving this institute on dispatching terminal
Fault point distance, fault type and the fault direction that sectionalised protection device obtains.
Invent achieved the utility model has the advantages that the present invention is a kind of fault localization suitable for high-speed railway sectional power supply mode
Method realizes the fault localization of sectional power supply mode.The present invention utilizes electric substation, the AT institute along the same supply arm of high-speed railway
With subregion sectionalised protection device acquire the fault current of each institute's leading-out terminal, the electric current based on the sectionalised protection device tripping moment
To calculate the position of fault point, and determining fault type and fault direction.Fault distance-finding method of the invention includes following advantages:
(1) fault localization scheme is changed to distribution by original centralization, eliminates dedicated fault location device,
The cost of investment of high-speed railway secondary device is saved；
(2) can sectionalised protection trip the moment provide fault localization report, including fault point distance, fault type and
The corresponding electricity virtual value of fault moment, meets the rapidity requirement of fault localization；
(3) current method ranging is used, practical without calibrating route unit reactance value and sucting electric current Q ratio, judgement
Accurately, the service restoration time after shortening high-speed rail line fault.
Detailed description of the invention
Fig. 1 is high-speed railway AT power supply mode schematic diagram；
Fig. 2 is high-speed railway sectional power supply schematic diagram；
Fig. 3 is a kind of distributed fault range-measurement system schematic diagram in the embodiment of the present invention；
Fig. 4 is a kind of sectional power supply mode fault distance-finding method flow chart in the embodiment of the present invention；
Fig. 5 is a kind of contact line-rail short-circuit current distribution map in the embodiment of the present invention；
Fig. 6 is a kind of positive feeder-rail short-circuit current distribution map in the embodiment of the present invention；
Fig. 7 is a kind of contact line-positive feeder short-circuit current distribution map in the embodiment of the present invention.
Specific embodiment
Below according to attached drawing and technical solution of the present invention is further elaborated in conjunction with the embodiments.
The present invention realizes fault localization function using the sectionalised protection device in high-speed railway sectional power supply protection system,
Special distributed fault location device is no longer set.By the sectionalised protection device for being distributed in each institute's pavilion on same supply arm
Distributed fault localization system is formed with communication processor, realizes the fault localization of high-speed railway sectional power supply mode.
A kind of fault localization system suitable for high-speed railway sectional power supply mode, comprising: using each institute's pavilion as sectionalised protection
Section boundary sectionalised protection section two sides setting sectionalised protection device, the sectionalised protection device for judge fault point away from
From, fault type and fault direction.
As a kind of preferred embodiment, further include each pavilion in communication processor, the communication manager be used for
This institute fault point distance that sectionalised protection device obtains, fault type and fault direction are given on dispatching terminal.
The sectionalised protection device of each sectionalised protection section two sides is divided into two class of uplink and downlink, for the institute of supply arm two sides
Ting Ji electric substation and subregion institute, are respectively set sectionalised protection device in uplink and downlink, are for being located at institute's pavilion among supply arm
The sectionalised protection device in 2 directions is then respectively set in AT institute on uplink and downlink feeder line, constitute the sectional power supply mode event of complete set
Hinder range-measurement system.
In this typical high-speed railway sectional power supply mode of Fig. 2 as an example, electric substation's uplink and downlink feeder line is respectively set one
A sectionalised protection device is respectively set in sectionalised protection device, subregion institute uplink and downlink leading-out terminal, and AT is then correspondingly arranged 2 directions
On 4 sectionalised protection devices, respectively with electric substation and subregion 2 devices constitute sectionalised protection, specific system configuration
See Fig. 3.
A kind of fault distance-finding method suitable for high-speed railway sectional power supply mode, comprising the following steps:
Wherein, the sectionalised protection device of sectionalised protection section two sides carries out data friendship by multiplex channel or designated lane
Change, exchange data packets include two sides segmentation outlet voltage, electric current and open into and output semaphore；
The corresponding sectionalised protection device in fault section route two sides judges fault type and fault direction；
The corresponding sectionalised protection device in fault section route two sides calculates fault point distance based on the current value at tripping moment.
As a kind of preferred embodiment, the current value is calculated for fault point two sides institute pavilion leading-out terminal current value using filtering
The transient state that method filters out the tripping moment decays the data that aperiodic DC component obtains.
Since sectionalised protection is instantaneous protection, the tripping moment, corresponding of ac data contained a large amount of aperiodic damping
DC component, so it is aperiodic straight to filter out by filtering algorithm transient state decaying therein during fault localization function is realized
Flow component, to improve the precision of fault localization result.
By high-speed railway sectional power supply mode change original AT and subregion main electrical scheme, eliminate on original
The line-breaker of downlink shunt trip breaker and feeder breaker instead institute's pavilion leading-out terminal, therefore original suct
Current ratio method judges that the method for fault type is no longer applicable in using the electric current flowed through on shunt trip breaker.
As a kind of preferred embodiment, the calculating fault point distance specific method is goes out based on fault point two sides institute pavilion
Line end current value and fault current pass through mesh voltage equation calculating fault point distance.
As a kind of preferred embodiment, calculating fault point distance, the specific method is as follows:
Current distribution such as Fig. 5 institute when being in contact line-rail short trouble between AT institute and subregion institute, on supply arm
Show, T indicate contact line, R indicate rail, F indicate positive feeder, AT institute and each conducting wire of subregion institute leading-out terminal electric current IT, IF and event
The relationship for hindering electric current I is as follows:
Show that fault localization formula is as follows:
As can be seen from the above equation fault point and AT between the ratio of distance and 2 times of section length be equal to subregion institute non-faulting
The contact line and positive feeder electric current of leading-out terminal and the ratio between with fault current.Uplink fault point is closer from subregion institute, flows through subregion institute
The fault current of downlink leading-out terminal is bigger.
Current distributing figure such as Fig. 6 when positive feeder-rail short trouble occurs between AT institute and subregion institute, on supply arm
It is shown, T indicate contact line, R indicate rail, F indicate positive feeder, AT institute and each conducting wire of subregion institute leading-out terminal electric current IT, IF and
The relationship of fault current I is as follows:
Show that fault localization formula is as follows:
As can be seen from the above equation fault point and AT between the ratio of distance and 2 times of section length be equal to subregion institute non-faulting
The contact line and positive feeder electric current of leading-out terminal and the ratio between with fault current I.Uplink fault point is closer from subregion institute, flows through subregion institute
The fault current of downlink leading-out terminal is bigger.
When being in contact line-positive feeder short trouble between AT institute and subregion institute, the current distributing figure on supply arm is such as
Shown in Fig. 7, T indicates contact line, and R indicates that rail, F indicate positive feeder, AT institute and electric current IT, IF of each conducting wire of subregion institute leading-out terminal
It is as follows with the relationship of fault current I:
Show that fault localization formula is as follows:
As can be seen from the above equation fault point and AT between the ratio of distance and section length be equal to the uplink and downlink outlet of subregion institute
The contact line current at end and the ratio between with fault current I.Uplink fault point is closer from subregion institute, and subregion institute's uplink and downlink leading-out terminal connects
It is bigger to touch the sum of line current.
Wherein:For electric substation's uplink T line current；For AT institute uplink bus T line current；For in subregion institute
Row bus T line current；For subregion institute Down-link HighWay T line current；For electric substation's uplink F line current；For in AT institute
Row bus F line current；For subregion institute uplink bus F line current；For subregion institute Down-link HighWay F line current；For
T line current on the left of fault point；For T line current on the right side of fault point；For the short circuit current of fault point；For a fault point left side
Side F line current；For F line current on the right side of fault point；Electric current is sucted for subregion institute AT auto-transformer；X is fault point
Distance apart from previous institute's pavilion；D is the length of section where fault point；For electric substation's downlink T line current；For AT institute
Down-link HighWay T line current；For electric substation's downlink F line current；For AT institute Down-link HighWay F line current.
As a kind of preferred embodiment, fault section two sides pass through close to the sectionalised protection device in institute's pavilion of fault point
The communication processor of this institute send fault point distance, fault type and fault direction on dispatching terminal.
As a kind of preferred embodiment, the differential starting current of the sectionalized line protection based on fault point two sides judges event
Hinder type and fault direction.
As a kind of preferred embodiment, the corresponding sectionalised protection device starting in fault section route two sides and tripping
Signal is the enabling signal that fault point distance calculates.
Specifically, data are carried out by multiplex channel between station or designated lane between the sectionalised protection device of each institute's pavilion to lead to
Letter, when short trouble occurs for some section, the sectionalised protection device of route two sides starts and trips, the segmentation of route two sides
Protective device acquires fault point two sides institute pavilion leading-out terminal of ac data, and filters out the aperiodic DC component of decaying, calculates failure
Point distance, judges fault type and fault direction according to differential starting current, obtains including fault point distance, fault type and event
Hinder the fault localization report including moment corresponding electricity virtual value, and is reported fault localization by communication processor in each
On send to dispatching terminal, the flow chart of specific implementation method is shown in attached drawing 4, wherein sectionalised protection device using segmentation longitudinal difference protection dress
It sets.
The fault distance-finding method that the present invention uses, without using the decompression of traction substation special ranging device, quick-break, resistance
It is anti-that defencive functions is waited to start ranging calculation process, sentence without the size of electric current is sucted using each institute's pavilion AT auto-transformer
Disconnected fault section, is counted merely with the current value of each conducting wire of leading-out terminal in the sectionalised protection Tripping data of guilty culprit section two sides
The position of fault point is calculated, and determines fault type and fault direction simultaneously.
The foregoing is merely the preferred embodiment of the present invention, to illustrate technical solution of the present invention, rather than limit it
System；It is noted that, modifying the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out
Equivalent replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (9)
1. a kind of fault distance-finding method suitable for high-speed railway sectional power supply mode, which comprises the following steps:
The corresponding sectionalised protection device in fault section route two sides judges fault type and fault direction；
The corresponding sectionalised protection device in fault section route two sides calculates fault point distance based on the current value at tripping moment.
2. a kind of fault distance-finding method suitable for high-speed railway sectional power supply mode according to claim 1, feature
It is, the current value filters out the transient state decaying at tripping moment for fault point two sides institute pavilion leading-out terminal current value using filtering algorithm
The data that aperiodic DC component obtains.
3. a kind of fault distance-finding method suitable for high-speed railway sectional power supply mode according to claim 1 or 2, special
Sign is that the calculating fault point distance specific method is to pass through based on mesh voltage equation by the current value and fault current
Calculate fault point distance.
4. a kind of fault distance-finding method suitable for high-speed railway sectional power supply mode according to claim 3, feature
It is, calculating fault point distance, the specific method is as follows:
When being in contact line-rail short trouble between AT institute and subregion institute, AT institute and the electricity of each conducting wire of subregion institute leading-out terminal
The relationship for flowing IT, IF and fault current I is as follows:
Show that fault localization formula is as follows:
When positive feeder-rail short trouble occurs between AT institute and subregion institute, AT institute and the electricity of each conducting wire of subregion institute leading-out terminal
The relationship for flowing IT, IF and fault current I is as follows:
Show that fault localization formula is as follows:
When being in contact line-positive feeder short trouble between AT institute and subregion institute, AT institute is with each conducting wire of subregion institute leading-out terminal
The relationship of electric current IT, IF and fault current I are as follows:
Show that fault localization formula is as follows:
Wherein:For electric substation's uplink T line current；For AT institute uplink bus T line current；It is female for subregion institute uplink
Line T line current；For subregion institute Down-link HighWay T line current；For electric substation's uplink F line current；It is female for AT institute uplink
Line F line current；For subregion institute uplink bus F line current；For subregion institute Down-link HighWay F line current；For failure
Point left side T line current；For T line current on the right side of fault point；For the short circuit current of fault point；For F line on the left of fault point
Electric current；For F line current on the right side of fault point；Electric current is sucted for subregion institute AT auto-transformer；X is fault point distance
The distance of previous institute's pavilion；D is the length of section where fault point.
5. a kind of fault distance-finding method suitable for high-speed railway sectional power supply mode according to claim 1, feature
It is, fault section two sides are close to the sectionalised protection device in institute's pavilion of fault point by the communication processor of this institute to dispatching terminal
On send fault point distance, fault type and fault direction.
6. a kind of fault distance-finding method suitable for high-speed railway sectional power supply mode according to claim 1, feature
It is, the differential starting current of the line sectionalizing protective device based on fault point two sides judges fault type and fault direction.
7. a kind of fault distance-finding method suitable for high-speed railway sectional power supply mode according to claim 1, feature
It is, the corresponding sectionalised protection device starting in fault section route two sides and trip signal are opening for fault point distance calculating
Dynamic signal.
8. a kind of fault localization system suitable for high-speed railway sectional power supply mode characterized by comprising be with each institute's pavilion
The sectionalised protection device of the boundary sectionalised protection section two sides setting of sectionalised protection section, the sectionalised protection device is for judging
Fault point distance, fault type and fault direction.
9. a kind of fault localization system suitable for high-speed railway sectional power supply mode according to claim 8, feature
Be, further include each pavilion in communication processor, the communication manager for given on dispatching terminal this institute sectionalised protection fill
Set the fault point distance obtained, fault type and fault direction.
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| CN110208653A (en) * | 2019-06-20 | 2019-09-06 | 西南交通大学 | A kind of electric railway perforation tractive power supply system and its fault section recognition methods |
| CN110244182A (en) * | 2019-06-28 | 2019-09-17 | 国电南瑞南京控制系统有限公司 | A kind of Fault Locating Method and system suitable for electric railway multipoint line |
| CN111610409A (en) * | 2020-06-10 | 2020-09-01 | 天津凯发电气股份有限公司 | Distance measurement method for electric railway AT power supply system |
| CN112557831A (en) * | 2021-02-24 | 2021-03-26 | 中国铁路设计集团有限公司 | Direct power supply type traction network fault location method with reinforcing wire |
| CN112904149A (en) * | 2021-01-29 | 2021-06-04 | 西南交通大学 | Single-line AT bilateral power supply traction network fault location calculation method |
| CN112946419A (en) * | 2021-01-29 | 2021-06-11 | 西南交通大学 | Electrified railway AT fault distance measurement correction coefficient calculation method |
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| CN112904149A (en) * | 2021-01-29 | 2021-06-04 | 西南交通大学 | Single-line AT bilateral power supply traction network fault location calculation method |
| CN112946419A (en) * | 2021-01-29 | 2021-06-11 | 西南交通大学 | Electrified railway AT fault distance measurement correction coefficient calculation method |
| CN112946419B (en) * | 2021-01-29 | 2022-03-08 | 西南交通大学 | Electrified railway AT fault distance measurement correction coefficient calculation method |
| CN112557831A (en) * | 2021-02-24 | 2021-03-26 | 中国铁路设计集团有限公司 | Direct power supply type traction network fault location method with reinforcing wire |
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