CN209692431U - A kind of tractive power supply system 27.5kV high-tension cable on-line condition monitoring device - Google Patents
A kind of tractive power supply system 27.5kV high-tension cable on-line condition monitoring device Download PDFInfo
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- CN209692431U CN209692431U CN201920491985.0U CN201920491985U CN209692431U CN 209692431 U CN209692431 U CN 209692431U CN 201920491985 U CN201920491985 U CN 201920491985U CN 209692431 U CN209692431 U CN 209692431U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model discloses a kind of tractive power supply system 27.5kV high-tension cable on-line condition monitoring devices, judge the operating status of 27.5kV high-tension cable with this using optical fiber perception high-precision to cable temperature.Distribution type fiber-optic is nested in 27.5kV high-tension cable by the utility model, according to the temperature and position of the Raman scattering effect of optical fiber and each point of optical time domain reflection effect measurement 27.5kV high-tension cable, and then judges the operating status of high-tension cable.The utility model is compared with traditional 27.5kV high-voltage cable state monitoring method, and measurement accuracy is high, and monitoring range is long, and the continuous measurement result of monitoring data is credible high, can carry out quick fault location to monitoring abnormal point；Monitoring system engineering adaptability itself is strong, not by electromagnetic interference, long service life, engineering economy with higher and practicability.
Description
Technical field
The utility model relates to a kind of traction power supplies to equip on-line monitoring field；More particularly to one kind based on distributed light
Fine tractive power supply system 27.5kV high-voltage cable state monitoring device.
Background technique
From the high-speed railway of first 350km/h in China on the 1st of August in 2008 --- Beijing-Tianjin inter-city railway open operation with
Come, high-speed railway rapidly develops in China.2018, with the newly-built high-speed iron of a batch such as Jinan-Qingdao, Hangzhoupro is yellow, Kazakhstan is male, green salt, Nan Long
Road puts into effect, and the total operating mileage of China express railway has reached 2.9 ten thousand kilometers, becomes high-speed railway in the world and goes into operation in operation
Journey longest, the maximum country of building scale.
With the rapid development that China express railway is built, 27.5kV high-tension cable is in high-speed railway tractive power supply system
Application it is also more and more common；Compared with conventional overhead power transmission line, 27.5kV high-tension cable has insulation spacing between line small, takes up an area
It is few, it is not easy to be affected by the external environment, power supply reliability is high, and operation is simple and convenient, stands and holds the advantages that beautiful.However it is limited by production
The influence of technique, annex quality, mounting process, the 27.5kV high-tension cable failure rate run is higher, and cable machinery failure
It is generally slowly developed by latent defect by time integral, existing manual inspection mode is difficult to being embedded in underground
27.5kV high-tension cable operating status is accurately differentiated.So high-speed railway field 27.5kV high-tension cable is in daily fortune at present
There are that can not prejudge before failure in row, failure is difficult to the shortcomings that quickly positioning after occurring, and gives entire high-speed railway traction power supply system
There are hidden danger for system safe and reliable operation.
Summary of the invention
Technical problem to be solved by the utility model is to provide a kind of high-speed railway tractive power supply system security reliabilities
Height can satisfy scene operation maintenance, be suitable for 27.5kV high-tension cable on-Line Monitor Device.
The utility model is the technical scheme adopted is that a kind of tractive power supply system 27.5kV high-tension cable presence is supervised
Device is surveyed, including the multimode temperature-measuring optical fiber 1 being installed in 27.5kV high-tension cable, the multimode temperature-measuring optical fiber is by E2000, and 8 °
Inclination angle flange is connected with optical fiber temperature measurement host 2.
The optical fiber temperature measurement host includes laser pulse signal transmitter, photoelectric signal collection device, central processing unit and shows
Show device；The laser pulse signal transmitter gives multimode temperature-measuring optical fiber transmitting 10ns to be delayed laser pulse, and by incident light frequency
With power trace to central processing unit；The photoelectric signal collection device acquisition multimode temperature-measuring optical fiber is generated because of Raman scattering effect
Back wave, and by the reflection wave frequency of acquisition and power transmission to central processing unit；Pass through display after central processing unit processing
Device is uploaded to scheduling duty room by temperature curve real-time display, and by complex automatic system.
The multimode temperature-measuring optical fiber is two core 62.5/125um, and multimode temperature-measuring optical fiber oversheath is the fire-retardant heat of low-smoke and non-halogen
Plastotype.
1 fiber attenuation coefficient of multimode temperature-measuring optical fiber is less than or equal to 0.8 dB/km, and bandwidth is more than or equal to 500 MHz/
Km, numerical aperture are 0.2 ± 0.015NA, and core diameter is 62.5 ± 3mm, and cladding diameter is 125 ± 2mm, maximum pull 2000
N, Maximal compression force are 400 N/cm, and temperature-measuring range is -200 DEG C ~+450 DEG C, and maximum measurement range is 30kM.
The utility model has the beneficial effects that due to can real-time monitoring 27.5kV high-tension cable operation when temperature, into
And the operating status of 27.5kV high-tension cable is realized and is monitored on-line, it effectively increases high-speed railway tractive power supply system and safely may be used
By property.The utility model is compared with traditional 27.5kV high-voltage cable state monitoring method, and measurement accuracy is high, and monitoring range is long,
The continuous measurement result of monitoring data is credible high, can carry out quick fault location to monitoring abnormal point；Monitoring system work itself
Journey is adaptable, not by electromagnetic interference, long service life, engineering economy with higher and practicability.
Detailed description of the invention
Fig. 1 is the utility model tractive power supply system 27.5kV high-voltage cable state monitoring method flow diagram；
Fig. 2 is the utility model 27.5kV high-voltage cable state monitoring structure drawing of device.
In figure:
1, multimode temperature-measuring optical fiber 2, optical fiber temperature measurement host 3, laser pulse signal transmitter
4, photoelectric signal collection device 5, central processing unit 6, display
7, complex automatic system 8, scheduling duty room.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and detailed description:
27.5kV high-tension cable has electric current to pass through when putting into operation, inherently generates heat because of fuel factor；It is wrapped in 27.5kV
The insulating materials of high-tension cable surrounding also has corresponding dielectric loss, can also generate heat；And when high-tension cable normal operation, with high pressure
When cable leads to performance degradation because of running certain reasons, the temperature of generation is also inevitable different；It therefore can be by 27.5kV
The running temperature of high-tension cable is monitored on-line, and then the operating status of accurate judgement 27.5kV high-tension cable and development become
Gesture.In order to realize tractive power supply system safe and reliable operation, it is necessary to which around the temperature of 27.5kV high-tension cable, this key refers to
Mark, furthers investigate tractive power supply system 27.5kV high-tension cable on-line monitoring technique.
As shown in Figure 1, a kind of tractive power supply system 27.5kV high-tension cable on-line condition monitoring method of the utility model, packet
Include following steps,
A. optical fiber temperature measurement host is by laser pulse signal transmitter therein to being embedded in tractive power supply system 27.5kV
Multimode temperature measuring optical cable in high-tension cable emits a 10ns delay laser pulse signal；
B. the initial power of incident laser pulse signal is recorded, frequencyAt the time of with transmitting incident light, and by its
The central processing unit being transmitted in optical fiber temperature measurement host；
C. the optical fiber molecule in temperature-measuring optical fiber is had an effect with laser pulse, and each point in multimode temperature-measuring optical fiber is because drawing
Graceful scattering effect generates the stokes light and anti-Stokes light opposite with the incoming signal direction of propagation；In optical fiber temperature measurement host
Photoelectric signal collection device acquisition multimode temperature-measuring optical fiber in the stokes light that is generated due to Raman scattering of each measurement point and instead
Stokes light is enabled apart from optical fiber temperature measurement hostLThe temperature at place isT, then photoelectric signal collection device collects at this timeLWhat place generated
Stokes optical power, frequencyWith anti-Stokes optical power, frequency, and to the time of photoelectric gathering apparatus be,
And it is transmitted to central processing unit；
D. central processing unit is according to the frequency of incident light, the frequency of collected stokes light, anti-Stokes
The frequency of light, calculated rate is poor, and can be obtained,Expression formula
WhereinFor thermodynamic temperature,、It is that stokes light and anti-Stokes light scattering interface are related respectively
Coefficient,For the coefficient of backscattering,、、It is incident light, stokes light and anti-Stokes light scattering light respectively
Transmission loss in a fiber,hFor planck constant；kFor Boltzmann's constant；、Respectively in temperatureTWhen,
Stokes light and anti-Stokes light coefficient related with optical fiber molecular entergy level i on population；
By anti-Stokes optical powerWith Stokes optical powerIt compares, can obtain apart from optical fiber temperature measurement hostLPlace's temperature
DegreeTExpression formula
By optical fiber temperature measurement hostLLocate temperatureTExpression formula and the preset fiducial temperature of systemCompared to temperature can be obtained
DegreeTOccurrence；
E. according to optical time domain reflection effect can ask apart from thermometric hostLThe distance value at place；The center of optical fiber temperature measurement host
The processing of processor pictureMeasurement point equally handles temperature and the position of each point of 27.5kV high-tension cable measured on distribution type fiber-optic
It sets
According to optical time domain reflection effect can ask apart from thermometric hostLThe distance value at place.
WhereinLDistance for measurement point apart from photosignal transmitter,For the light velocity in vacuum,Light pulse signal hair
The time difference that photoelectric signal collection device is arrived at back-scattering light is penetrated,For optical fibre refractivity；
F. the high-tension cable temperature value that each measurement point real-time monitors is compared with alarm threshold value is preset, according to tight
Weight degree issues the alarm signal of appropriate level, and the temperature value of cable temperature abnormal point and specific location are transferred to synthesis
Automated system, then scheduling duty room is uploaded to by complex automatic system.
As shown in Fig. 2, the utility model tractive power supply system 27.5kV high-tension cable on-line condition monitoring device, including peace
Loaded on the multimode temperature-measuring optical fiber 1 in 27.5kV high-tension cable, multimode temperature-measuring optical fiber 1 is used as distributed temperature real-time monitoring and signal
Transport vehicle, by E2000,8 ° of inclination angle flanges are connected with optical fiber temperature measurement host 2.
The optical fiber temperature measurement host 2 includes laser pulse signal transmitter 3, photoelectric signal collection device 4, central processing unit 5
With display 6；The laser pulse signal transmitter 3 emits 10ns delay laser pulse to multimode temperature-measuring optical fiber 1, and will be incident
Light frequency and power trace are to central processing unit 5；The photoelectric signal collection device 4 acquires multimode temperature-measuring optical fiber 1 because of Raman scattering
Effect and the back wave generated, and by the reflection wave frequency of acquisition and power transmission to central processing unit 5；5 energy of central processing unit
Enough processingMeasurement point equally handles the temperature for being distributed in each point of 27.5kV high-tension cable measured on optical fiber and position, place
By display 6 by temperature curve real-time display after reason, and scheduling duty room 8 is uploaded to by complex automatic system 7.It is described
Multimode temperature-measuring optical fiber 1 is two core 62.5/125um multimode fibres, and cable outer sheath uses the fire-retardant heat of high performance low-smoke and non-halogen
Molding material, temperature measuring optical cable have excellent thermal conduction characteristic, mechanical performance, waterproof performance and anticorrosion properties, multimode thermometric
1 oversheath of optical fiber is the fire-retardant thermoplastics type of low-smoke and non-halogen.1 fiber attenuation coefficient of multimode temperature-measuring optical fiber is less than or equal to 0.8
DB/km, bandwidth are more than or equal to 500 MHz/km, and numerical aperture is 0.2 ± 0.015NA, and core diameter is 62.5 ± 3mm, cladding diameter
For 125 ± 2mm, maximum pull is 2000 N, and Maximal compression force is 400 N/cm, and temperature-measuring range is -200 DEG C ~+450 DEG C, most
Wide-measuring range is 30kM.
It is worth noting that the protection scope of the utility model is not limited to above-mentioned specific example mode, according to this reality
Conceived with novel basic fundamental, it is also possible to which the purpose of this utility model may be implemented in basically same structure, as long as this field
Those of ordinary skill needs not move through creative work, the embodiment that can be associated, and belongs to the protection model of the utility model
It encloses.
Claims (4)
1. a kind of tractive power supply system 27.5kV high-tension cable on-line condition monitoring device, which is characterized in that including being mounted on
Multimode temperature-measuring optical fiber (1) in 27.5kV high-tension cable, the multimode temperature-measuring optical fiber (1) pass through E2000,8 ° of inclination angle flanges and light
Fine thermometric host (2) is connected.
2. tractive power supply system 27.5kV high-tension cable on-line condition monitoring device according to claim 1, feature exist
In the optical fiber temperature measurement host (2) includes laser pulse signal transmitter (3), photoelectric signal collection device (4), central processing unit
(5) and display (6)；The laser pulse signal transmitter (3) gives multimode temperature-measuring optical fiber (1) transmitting 10ns delay laser arteries and veins
Punching, and by incident light frequency and power trace to central processing unit (5)；The photoelectric signal collection device (4) acquires multimode thermometric
The back wave that optical fiber (1) is generated by Raman scattering effect, and by the reflection wave frequency of acquisition and power transmission to central processing
Device (5)；By display (6) by temperature curve real-time display after central processing unit (5) processing, and pass through complex automatic system
(7) it is uploaded to scheduling duty room (8).
3. tractive power supply system 27.5kV high-tension cable on-line condition monitoring device according to claim 1, feature exist
In the multimode temperature-measuring optical fiber (1) is two core 62.5/125um, and multimode temperature-measuring optical fiber (1) oversheath is that low-smoke and non-halogen is fire-retardant
Thermoplastics type.
4. tractive power supply system 27.5kV high-tension cable on-line condition monitoring device according to claim 1, feature exist
In multimode temperature-measuring optical fiber (1) fiber attenuation coefficient is less than or equal to 0.8 dB/km, and bandwidth is more than or equal to 500 MHz/km, number
Value aperture is 0.2 ± 0.015NA, and core diameter is 62.5 ± 3mm, and cladding diameter is 125 ± 2mm, and maximum pull is 2000 N, maximum
Compressive resistance is 400 N/cm, and temperature-measuring range is -200 DEG C ~+450 DEG C, and maximum measurement range is 30kM.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920491985.0U CN209692431U (en) | 2019-04-11 | 2019-04-11 | A kind of tractive power supply system 27.5kV high-tension cable on-line condition monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920491985.0U CN209692431U (en) | 2019-04-11 | 2019-04-11 | A kind of tractive power supply system 27.5kV high-tension cable on-line condition monitoring device |
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| CN209692431U true CN209692431U (en) | 2019-11-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109904932A (en) * | 2019-04-11 | 2019-06-18 | 中国铁路设计集团有限公司 | A kind of tractive power supply system 27.5kV high-tension cable on-line condition monitoring method and monitoring device |
| CN109904932B (en) * | 2019-04-11 | 2024-07-05 | 中国铁路设计集团有限公司 | On-line state monitoring method and monitoring device for 27.5kV high-voltage cable of traction power supply system |
-
2019
- 2019-04-11 CN CN201920491985.0U patent/CN209692431U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109904932A (en) * | 2019-04-11 | 2019-06-18 | 中国铁路设计集团有限公司 | A kind of tractive power supply system 27.5kV high-tension cable on-line condition monitoring method and monitoring device |
| CN109904932B (en) * | 2019-04-11 | 2024-07-05 | 中国铁路设计集团有限公司 | On-line state monitoring method and monitoring device for 27.5kV high-voltage cable of traction power supply system |
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