CN106291235A - Railway run-through circuit cable method for monitoring operation states - Google Patents
Railway run-through circuit cable method for monitoring operation states Download PDFInfo
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- CN106291235A CN106291235A CN201610615483.5A CN201610615483A CN106291235A CN 106291235 A CN106291235 A CN 106291235A CN 201610615483 A CN201610615483 A CN 201610615483A CN 106291235 A CN106291235 A CN 106291235A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
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Abstract
A kind of railway run-through circuit cable method for monitoring operation states, belongs to railway run-through circuit on-line monitoring field.High-speed railway through line cord method for monitoring operation states, including the through line cord of high-speed railway, it is characterized in that: whether produced by detection high-speed railway through circuit cable bus PT residual voltage transient signal, judge whether the through line cord of high-speed railway occurs instantaneity transient fault, the electro-magnetic transient signal flowing through metal screen layer produced by monitoring and the record through line cord of high-speed railway, railway run-through circuit cable is carried out fault pre-alarming, and indicates trouble point distance.The method is compared with original cable method for monitoring operation states, instantaneity transient state earth fault can be occurred before damaging for cable to implement early warning, may filter that train is crossed car, catered to the non-faulting disturbing signals such as lock, effectively reduce the system wrong report that disturbance brings, improve warning accuracy, reduce rate of false alarm.
Description
Technical field
The invention belongs to railway run-through circuit on-line monitoring field, a kind of railway run-through circuit cable runs shape
State monitoring method
Background technology
Through track on railway is used for directly can for railway each station electric horn interlocking apparatus and the offer of interval self-closing signaling point
Lean on, the power circuit of uninterrupted power source, be the important component part of railway power system, its power supply reliability not only directly affects
To the safe operation of railway locomotive, also affect the power supply within railway and distribution work simultaneously, be the weight concerning railway transportation
Want item.
Railway transportation develops to high speed, high density direction, it is ensured that the reliable power supply of supply line, is to ensure train
Run safe and punctual primary condition.Traditional path monitoring mode uses the mode of manual inspection, and its investment is huge, and
When breaking down, fault is not easy to search, and eliminating is wasted time and energy, and accuracy, poor real are often brought great to railway transportation
Loss.Along with the speed-raising of current rail track and automatization level improve, the safety and reliability of supply line is proposed
Higher requirement, the most correctly and efficiently judges, searches, processes feeder line fault, shorten power off time, restore electricity in time
Particularly critical.
At present in the through cable of high-speed railway before there is permanent earth fault, generation repeatedly in very short time by
In the punch-through that major insulation cracking causes, puncturing rear major insulation can recover rapidly so that general detection device is difficult to monitor.Ferrum
Road through line cord method for monitoring operation states, is under railway run-through line cable running status, in above-mentioned cable instantaneity
When transient fault occurs, voltage traveling wave and fault section cable, the metal screen layer transient current to through track cable
Waveform is monitored, it is achieved railway run-through line cable fault early warning, determines faulty line section and instruction trouble point distance.
Summary of the invention
According to above deficiency of the prior art, it is an object of the invention to provide a kind of for high-speed railway through track electricity
The on-line early warning method of the instantaneity transient fault of cable, the instantaneity transient fault before cable is damaged, implement on-line early warning,
It is easy to power supply department shift to an earlier date or planned maintenance, it is to avoid because cable catastrophic failure causes power failure, reduce the warp caused because of power failure
Ji loss and the adverse effect bringing enterprise's production and people's lives, improve the railway run-through circuit cable of power supply reliability
Method for monitoring operation states.
The technical solution adopted for the present invention to solve the technical problems is: railway run-through circuit cable monitoring running state side
Method, including the through line cord of high-speed railway, it is characterised in that: by detection high-speed railway through circuit cable bus PT zero sequence
Whether voltage transient signal produces, and judges whether the through line cord of high-speed railway occurs instantaneity transient fault, by prison
Survey and the electro-magnetic transient signal flowing through metal screen layer of record high-speed railway through line cord generation, to railway run-through circuit
Cable carries out fault pre-alarming, and indicates trouble point distance.
What described monitoring and the record through line cord of high-speed railway produced flows through the electro-magnetic transient letter of metal screen layer
Number, refer to that the current sensor utilizing several high-speed railways through circuit monitoring running state device is to railway run-through circuit originally
Each case under section substation bus bar becomes and/or the transient state of cable grounding point metal screen layer of the logical number interior power cable line of institute
Current signal carries out real-time online collection and record.
Described line cord through to high-speed railway carries out fault pre-alarming, and indicates trouble point distance, refers to utilize
Voltage sensor monitors residual voltage signal and instantaneity disturbance occurs, and when meeting trigger condition, it is judged that pass through for high-speed railway
Logical circuit generation instantaneity transient fault, extract this moment each case become and/or logical number the transient current of metal screen layer
Signal, is uploaded to railway power supply master system platform by this many groups signal, and railway power supply master system platform utilizes transient state
The waveform of current signal is analyzed and processes, and determines fault section, and by the row wave reflection information pair of transient current signal
Find range in trouble point.
Signal on the through line cord of high-speed railway is sufficiently complex, at least includes that control signal, closing operation, transient state are believed
Number, true ground connection steady-state signal etc., in order to accurately judge whether instantaneity transient fault, the waveform collected is analyzed
Time, need the waveform gathered is distinguished, therefore distinguish that the setting of condition is extremely important.According to high-speed railway through track electricity
Cable practical situation set, described trigger condition refer to residual voltage signal through waveform analysis, its waveform meet:
1) variation tendency reaches empirical value；I.e. waveform angle of elevation is more than or equal to empirical value.As required, empirical value is permissible
It it is 30 °-80 °, through arranging, it is simple to display, it is simple to perusal is distinguished.May also be, shown waveform pace of change or
Person's rate of climb, the sample point of unit interval, first point and the 4th point data difference are more than 50.
2) superposition transient signal on power frequency waveform；The waveform widths of transient signal is more than or equal to 7/64K.
3) RMS value of energy reaches 50.Can also be arranged as required to as 17-100.
Or described trigger condition refer to residual voltage signal through waveform analysis, the pulse rate of climb reaches in 3 μ s
Rise 1.465V, and persistently more than 5.859V in 7 μ s.
Described analysis and process, including to transient electromagnetic transient signal
(1) carry out signal condition and analog digital conversion, and store；
(2) utilize waveform morphology and the energy value of many group transient electromagnetic transient signals, filter misoperation signal, find fault
Interval, determine by which case become and/or logical number the fault transient state current signal that sends of the through line cord of high-speed railway；
(3) by the row wave reflection information of this fault transient state current signal, is found range in trouble point.
It is >=500kHz that described voltage sensor gathers residual voltage transient signal sample frequency.
The electromagnetism of the metal screen layer that described current sensor monitoring and record high-speed railway through track cable produce is temporary
State signal sampling frequency is >=2MHz.
Railway run-through circuit cable method for monitoring operation states of the present invention is had the beneficial effect that to transport with original cable
Row state monitoring method is compared, and instantaneity transient state earth fault can be occurred to implement early warning, may filter that fire before damaging for cable
Car is crossed car, is catered to the non-faulting disturbing signals such as lock, effectively reduces the system wrong report that disturbance brings, improves warning accuracy, reduce
Rate of false alarm.Particularly: by the bus residual voltage signal monitoring of tested railway run-through circuit cable and metal screen layer
Earth conductor transient current monitor, this method can:
1, the railway run-through online fault pre-alarming of circuit cable can be realized, and trouble point distance can be explicitly indicated；
2, the change of supply transformer residual voltage can be monitored, improve warning accuracy, reduce fault misdescription rate；
3, do not change the cable method of operation and structure, be not take up existing system resource, safe and reliable；
Accompanying drawing explanation
Fig. 1 is the electrical schematic diagram of the present invention；
Fig. 2 is the functional-block diagram of the high-speed railway through circuit monitoring running state device of the present invention；
Fig. 3 is the functional-block diagram of the residual voltage monitoring device of the present invention；
Fig. 4 is the actual measurement residual voltage signal waveforms of the present invention；
Fig. 5 is the actual measurement transient current signal oscillogram of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings embodiments of the invention are described further:
Embodiment 1:
As Figure 1-3, railway run-through circuit cable method for monitoring operation states, including the through line electricity of high-speed railway
Cable, case become and/or logical number institute and transformer station, arrange voltage biography on the high-speed railway through circuit cable bus PT of transformer station
Sensor gathers residual voltage transient signal, gathers each section of high-speed iron at current sensor set by the change of each case and/or logical number
The electro-magnetic transient signal flowing through metal screen layer of the through line cord in road.
The electro-magnetic transient signal that current sensor collects is defeated by high-speed railway through circuit monitoring running state device
Deliver to railway power supply master system platform.High-speed railway through circuit monitoring running state device includes the signal that circuit couples
Conditioner A, high-speed a/d converter, high-speed comparator, FPGA1, clock decoding A, dynamic memory A and processor A, processor A
Host computer, i.e. railway power supply master system platform is connected by Ethernet chip A.Current sensor monitoring and record high-speed iron
The electro-magnetic transient signal sampling frequency of the metal screen layer that road through track cable produces is >=2MHz.
The residual voltage transient signal that voltage sensor collects is transported to railway power supply by residual voltage monitoring device
Master system platform.Residual voltage monitoring device include signal conditioner B that circuit couples, low-speed a/d converter, FPGA2,
Clock decoding B, dynamic memory B and processor B, processor B also connect host computer, i.e. railway power supply by Ethernet chip B
Master system platform.It is >=500kHz that voltage sensor gathers residual voltage transient signal sample frequency.
Whether concrete grammar is: produced by detection high-speed railway through circuit cable bus PT residual voltage transient signal
Raw, judge whether the through line cord of high-speed railway occurs instantaneity transient fault, passed through by monitoring and record high-speed railway
The electro-magnetic transient signal flowing through metal screen layer that logical line cord produces, carries out fault pre-alarming to railway run-through circuit cable,
And indicate trouble point distance.
The electro-magnetic transient signal flowing through metal screen layer that monitoring and the record through line cord of high-speed railway produce, refers to
Utilize the current sensor of high-speed railway through circuit monitoring running state device to this section of substation bus bar of railway run-through circuit
Under each case become and/or the transient current signal of cable grounding point metal screen layer of the logical number interior power cable line of institute is carried out
Real-time online gathers and record.
Line cord through to high-speed railway carries out fault pre-alarming, and indicates trouble point distance, refers to utilize voltage to pass
Sensor monitors residual voltage signal and instantaneity disturbance occurs, and when meeting trigger condition, it is judged that occur for railway run-through circuit
Instantaneity transient fault, extract this moment each case become and/or logical number the transient current signal of metal screen layer, this is many
Group signal is uploaded to railway power supply master system platform, and railway power supply master system platform utilizes the ripple of transient current signal
Shape is analyzed and processes, and determines fault section, and is surveyed trouble point by the row wave reflection information of transient current signal
Away from.
Setting according to high-speed railway through track cable practical situation, trigger condition refers to that residual voltage signal divides through waveform
Analysis, its waveform meets:
1) variation tendency reaches empirical value；I.e. waveform angle of elevation is more than or equal to empirical value.As required, empirical value is permissible
It it is 30 °-80 °, through arranging, it is simple to display, it is simple to perusal is distinguished.
2) superposition transient signal on power frequency waveform；The waveform widths of transient signal is more than or equal to 7/64K.
3) RMS value of energy reaches 50.
Analyze and process, including to transient electromagnetic transient signal
(1) carry out signal condition and analog digital conversion, and store；
(2) utilize waveform morphology and the energy value of many group transient electromagnetic transient signals, filter misoperation signal, find fault
Interval, determine by which case become and/or logical number the fault transient state current signal that sends of the through line cord of high-speed railway；
(3) by the row wave reflection information of this fault transient state current signal, is found range in trouble point.
Embodiment 2:
On the basis of embodiment 1, setting according to high-speed railway through track cable practical situation, trigger condition refers to zero sequence
Voltage signal reaches empirical value through waveform analysis, the variation tendency that its waveform meets；Shown waveform pace of change or on
Lifting speed, the sample point of unit interval, first point and the 4th point data difference are more than 50.
Embodiment 3:
On the basis of above example, trigger condition is revised as residual voltage signal raising speed in waveform analysis, pulse
Degree rises 1.465V in reaching 3 μ s, and persistently more than 5.859V in 7 μ s.
Experiment proves:
As shown in Figure 4, Figure 5, transverse axis is the time, and the longitudinal axis is amplitude.In residual voltage signal waveform Fig. 4, in 0.001 second
Produce projection upwards, represent that instantaneity disturbance occurs in residual voltage signal, meet trigger condition, it is judged that for railway run-through circuit
There is instantaneity transient fault.
Transfer this moment each case become and/or logical number the transient current signal of metal screen layer, by this many groups signal
Being uploaded to railway power supply master system platform, railway power supply master system platform utilizes the waveform of transient current signal to carry out
Analyze and process, determine fault section, then by the waveform shown in Fig. 5, find echo, and calculate the fortune from fault moment
The row time, is 946.05 meters by velocity of wave * Time Calculation trouble point distance.
Claims (8)
1. high-speed railway through line cord method for monitoring operation states, including the through line cord of high-speed railway, its feature exists
In: whether produced by detection high-speed railway through circuit cable bus PT residual voltage transient signal, judge high-speed railway
Whether through line cord there is instantaneity transient fault, the stream produced by monitoring and the record through line cord of high-speed railway
Through the electro-magnetic transient signal of metal screen layer, railway run-through circuit cable is carried out fault pre-alarming, and indicates trouble point distance.
High-speed railway the most according to claim 1 through line cord method for monitoring operation states, it is characterised in that: described
Monitoring and record the through line cord of high-speed railway produce the electro-magnetic transient signal flowing through metal screen layer, if refer to utilize
The current sensor of dry high-speed railway through circuit monitoring running state device is to this section of substation bus bar of railway run-through circuit
Under each case become and/or the transient current signal of cable grounding point metal screen layer of the logical number interior power cable line of institute is carried out
Real-time online gathers and record.
High-speed railway the most according to claim 1 through line cord method for monitoring operation states, it is characterised in that: described
Line cord through to high-speed railway carry out fault pre-alarming, and indicate trouble point distance, refer to monitor residual voltage letter
Number instantaneity disturbance occurs, and when meeting trigger condition, it is judged that for railway run-through circuit generation instantaneity transient fault, extract this
Moment each case become and/or logical number the transient current signal of metal screen layer, this many groups signal is uploaded to railway power supply
Master system platform, railway power supply master system platform utilizes the waveform of transient current signal be analyzed and process, really
Determine fault section, and by the row wave reflection information of transient current signal, is found range in trouble point.
High-speed railway the most according to claim 3 through line cord method for monitoring operation states, it is characterised in that: described
Trigger condition refer to residual voltage signal through waveform analysis, its waveform meet:
1) variation tendency reaches empirical value；
2) superposition transient signal on power frequency waveform；
3) RMS value of energy reaches 50.
High-speed railway the most according to claim 3 through line cord method for monitoring operation states, it is characterised in that: described
Trigger condition refer to residual voltage signal through waveform analysis, the pulse rate of climb reaches to rise in 3 μ s 1.465V, and
Persistently more than 5.859V in 7 μ s.
High-speed railway the most according to claim 1 through line cord method for monitoring operation states, it is characterised in that: described
Analysis and process, including to transient electromagnetic transient signal
(1) carry out signal condition and analog digital conversion, and store；
(2) utilize waveform morphology and the energy value of many group transient electromagnetic transient signals, filter misoperation signal, find faulty section
Between, determine by which case become and/or logical number the fault transient state current signal that sends of the through line cord of high-speed railway；
(3) by the row wave reflection information of this fault transient state current signal, is found range in trouble point.
7., according to the high-speed railway through line cord method for monitoring operation states described in claim 1,2,4 or 5, its feature exists
In: described voltage sensor residual voltage transient signal sample frequency is >=500kHz.
High-speed railway the most according to claim 1 through line cord method for monitoring operation states, it is characterised in that: described
Current sensor monitoring and record high-speed railway through track cable produce metal screen layer electro-magnetic transient signal sampling frequency
Rate is >=2MHz.
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| CN201610615483.5A CN106291235B (en) | 2016-07-29 | 2016-07-29 | Railway run-through route cable method for monitoring operation states |
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| CN201610615483.5A CN106291235B (en) | 2016-07-29 | 2016-07-29 | Railway run-through route cable method for monitoring operation states |
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Cited By (8)
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| CN106950474A (en) * | 2017-03-22 | 2017-07-14 | 哈红 | The upkeep operation method of railway automatic blocking line |
| CN107015102A (en) * | 2017-05-12 | 2017-08-04 | 武汉中直电气股份有限公司 | The distance-finding method and system of a kind of direct current rail transportation supply line short trouble |
| CN108318731A (en) * | 2018-01-26 | 2018-07-24 | 吉林市盈冲科技有限公司 | Boosting cable, lateral connection line current on-Line Monitor Device |
| CN109119979A (en) * | 2018-10-25 | 2019-01-01 | 西南交通大学 | A kind of cable fault protective device and its guard method |
| CN111025088A (en) * | 2019-12-09 | 2020-04-17 | 北京铁诚精锐电力技术有限公司 | Railway power line fault positioning method and device |
| CN111157838A (en) * | 2018-11-08 | 2020-05-15 | 中国铁路沈阳局集团有限公司科学技术研究所 | Intelligent management system for big data of running state of railway power distribution network |
| CN111999603A (en) * | 2020-08-31 | 2020-11-27 | 吉林省龙波电气技术有限公司 | Cable line distributed fault accurate positioning method and device |
| CN114236315A (en) * | 2021-12-23 | 2022-03-25 | 国网山东省电力公司烟台供电公司 | Submarine cable running state monitoring device and monitoring method thereof |
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| CN111999603A (en) * | 2020-08-31 | 2020-11-27 | 吉林省龙波电气技术有限公司 | Cable line distributed fault accurate positioning method and device |
| CN114236315A (en) * | 2021-12-23 | 2022-03-25 | 国网山东省电力公司烟台供电公司 | Submarine cable running state monitoring device and monitoring method thereof |
| CN114236315B (en) * | 2021-12-23 | 2023-12-29 | 国网山东省电力公司烟台供电公司 | Submarine cable running state monitoring device and monitoring method thereof |
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