CN105866617B - A kind of transmission line of electricity ground connection arcing fault localization method based on optical fiber sensing technology - Google Patents
A kind of transmission line of electricity ground connection arcing fault localization method based on optical fiber sensing technology Download PDFInfo
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- CN105866617B CN105866617B CN201610137989.XA CN201610137989A CN105866617B CN 105866617 B CN105866617 B CN 105866617B CN 201610137989 A CN201610137989 A CN 201610137989A CN 105866617 B CN105866617 B CN 105866617B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 40
- 230000005611 electricity Effects 0.000 title claims abstract description 29
- 239000013307 optical fiber Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005516 engineering process Methods 0.000 title claims abstract description 11
- 230000004807 localization Effects 0.000 title claims abstract description 9
- 230000003287 optical effect Effects 0.000 claims abstract description 17
- 238000012544 monitoring process Methods 0.000 claims abstract description 15
- 239000000835 fiber Substances 0.000 claims abstract description 9
- 230000006854 communication Effects 0.000 claims abstract description 6
- 230000001154 acute effect Effects 0.000 claims abstract description 3
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- 238000007405 data analysis Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 7
- 230000005684 electric field Effects 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
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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
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
A kind of transmission line of electricity ground connection arcing fault localization method based on optical fiber sensing technology, realizes the quick positioning to overhead transmission line ground connection arcing fault.The present invention is using the existing OPGW optical fiber of transmission line of electricity as sensor, the injected pulse laser signal in OPGW spare fibre channel, by high-speed data acquiring device, real-time monitoring optical signal in communication process along it is rear to Rayleigh scattering light.When ground connection arcing fault occurs for transmission line of electricity, OPGW shunts fault current, the fault current of shunting generates high-intensity magnetic field, strong electrical field, TRANSIENT HIGH TEMPERATURE and electric power around OPGW, and make the intensity of the backward Rayleigh scattering light of OPGW internal transmission light that acute variation occur, by changing the time delay at moment after acquisition to Rayleigh scattering luminous intensity, it calculates transmission line of electricity and the specific location of ground fault flashover occurs, to realize the quick positioning of overhead transmission line ground connection arcing fault.
Description
Technical field
The present invention relates to a kind of, and the transmission line of electricity based on optical fiber sensing technology is grounded arcing fault localization method, belongs to power transmission line
Road failure analysis techniques field.
Background technique
Transmission line of electricity is cross-domain big, and distance, process is with a varied topography, is easy to be struck by lightning, the various natures such as mountain fire and bird pest
Disaster influences, and leads to ground connection flashover tripping fault occur.Trip accident each time can also other than bringing impact to system
The facilities such as insulator, conducting wire are damaged, leave security risk to system operation.Therefore, fault point is promptly and accurately found, and to route
Carry out the important process that reparation is system operation and maintenance.Existing fault localization generallys use impedance method, and impedance method is basis
The voltage and current that is measured when failure and calculate Fault loop impedance, the ranging and positioning to fault point are realized with this,
But this method is difficult to overcome the influence of the factors such as transition resistance, system operation mode, line distribution capacitance, mutual inductor saturation, essence
Degree is not high, and especially range error is very big under high resistive fault, is unable to satisfy the needs of flashover point location.
Currently, generally utilizing optical fiber in the communication and data transmission of electric system, powerline network is constituted, especially
OPGW(Optical Fiber Composite Overhead Ground Wire) technology, it has been widely applied at home.
Optical fiber is integrated in the ground wire of aerial high voltage power line by OPGW, while having both the function of ground wire and communication, is widely used in
110kV and the above transmission line of electricity.With the development of optical fiber sensing technology, optical fiber in powerline network serves not only as electric power
The carrier of communication, and can be used as the carrier of Fibre Optical Sensor in on-line monitoring, realize to the monitoring of line-to-ground arcing fault with
Positioning.
Therefore, a kind of transmission line of electricity ground connection arcing fault localization method based on optical sensing is established, to help to run
Maintenance personnel quickly determines Location, shortens emergency repair time, seems especially for the safe and stable operation of transmission line of electricity
It is significant.
Summary of the invention
The object of the present invention is in order to improve the accuracy of transmission line of electricity ground connection arcing fault positioning, using in physics
Faraday effect, propose it is a kind of based on optical fiber sensing technology transmission line of electricity ground connection arcing fault localization method.
The basic principle of this method is the light wave propagated in optical fiber, and a part is propagated forward, due to the non-knot of optical fiber
In micro-space there are uneven texture, some light can scatter brilliant material.There are mainly three types of scatterings in optical fiber:
Rayleigh scattering (Rayleigh scattering), Raman scattering (Raman scattering) and Brillouin scattering
(Brillouin scattering), and strongest scattering is Rayleigh scattering, and is easiest to monitoring.It is imitated according to faraday
It answers, when external physical quantity (such as magnetic field, electric field and temperature) changes, absorption, loss characteristic, the scattering of optical fiber can be caused
Coefficient and scatter light polarization state etc. change, by after detection to Rayleigh scattering luminous intensity, the delay time of optical signal, benefit
The space orientation to external physical quantity can be realized with optical time domain reflection.
The technical scheme is that
The present invention will be injected in OPGW spare fibre channel using the existing OPGW optical fiber of transmission line of electricity as sensor
Pulsed laser signal, by high-speed data acquiring device, real-time monitoring optical signal in communication process along it is rear to Rayleigh dissipate
Penetrate light.When ground connection arcing fault occurs for transmission line of electricity, OPGW shunts fault current, and the fault current of shunting produces around OPGW
Raw high-intensity magnetic field, strong electrical field, TRANSIENT HIGH TEMPERATURE and electric power, and the intensity of the backward Rayleigh scattering light of OPGW internal transmission light occurs
Acute variation calculates transmission line of electricity and is grounded by changing the time delay at moment after acquisition to Rayleigh scattering luminous intensity
The specific location of failure flashover, to realize the quick positioning of overhead transmission line ground connection arcing fault.
The method realizes that monitoring host is mounted in substation's computer room by monitoring host；Monitoring host includes arteries and veins
Rush laser generating unit, data acquisition unit, data analysis and processing unit；Pulse laser generating unit and OPGW optical-fibre channel
It is connected, and the injected pulse laser signal into OPGW spare fibre channel, data acquisition unit is after the acquisition of OPGW optical-fibre channel
Intensity and optical signal delay time to Rayleigh scattering light send the signal of acquisition to data analysis and processing unit.
Scheme of the present invention can be achieved by the steps of:
(1) transmission line information is monitored to collect.Obtain the Contact patch of monitored transmission line of electricity OPGW optical fiber, failure is jumped
The information such as lock information, physical length and corresponding shaft tower number.
(2) injection and acquisition of monitoring signals.To OPGW spare fibre injection optics signal, optical signal is acquired in real time and is being passed
The intensity of backward Rayleigh scattering light during defeated and optical signal delay time.
(3) failure data analysis and processing.According to collected scattered light intensity and delay time, scattering light is calculated
Relationship between intensity and spatial position forms scattered light signal signature waveform.Ground connection flashover occurs by analysis transmission line of electricity
The scattered light signal signature waveform of fault moment obtains the specific location of ground connection arcing fault.
The beneficial effect of the present invention compared with the prior art is that (1) present invention makes full use of existing on transmission line of electricity
OPGW optical fiber makees sensor, does not need additionally to install any sensor additional in transmission line of electricity, and monitors host and be mounted on substation's machine
In room, simple possible；(2) present invention utilizes advanced optical fiber sensing technology, Fibre Optical Sensor has frequency response height, is easily each
Kind light-detecting device receives and conversion, and therefore, which has the advantages that high reliablity and be easily achieved；(3) present invention is applicable in
In various ground connection arcing faults, not by factors shadows such as transition resistance, system operation mode, line distribution capacitance, mutual inductor saturations
It rings, positional accuracy is high, can also be achieved the positioning to high resistance ground arcing fault.
Detailed description of the invention
Fig. 1 is present system structural schematic diagram；
Fig. 2 is that the transmission line of electricity based on optical fiber sensing technology is grounded arcing fault positioning flow figure.
Specific embodiment
A specific embodiment of the invention the following steps are included:
(1) the installation monitoring host in substation's computer room, and be connected with spare fibre channel in OPGW.Host is monitored by arteries and veins
Rush laser generating unit, data acquisition unit, data analysis and processing unit composition.
(2) pass through pulse laser generating unit to OPGW optical fiber injection optics signal, data acquisition unit real-time monitoring light
Signal in transmission process after to Rayleigh scattering light scattering strengthP i With optical signal delay time△T i 。
(3) data analysis is from processing unit according to different light scatter intensitiesP i Delay time△T i , calculate different scatterings
The optical signal of intensityP i Corresponding distanceL i , calculation formula is as follows:
Wherein,CFor the light velocity in vacuum, n is fiber core refractive index.
(4) optical signal of different scattering strengths is indicated in the form of two-dimensional coordinatesP i Corresponding distanceL i , formed backward
The signature waveform of Rayleigh scattering optical signal, wherein X-axis indicates at a distance from signal decanting pointL, i.e. scattered light intensity corresponding position
The distance between signal decanting point, unit m;To Rayleigh scattering light relative intensity after Y-axis recordP, unit a.u..
(5) time that transmission line of electricity ground connection arcing fault occurs is collected, and obtains the moment backward Rayleigh scattering optical signal
Signature waveform, maximum light signal strengthP max Corresponding distanceL max As ground connection arcing fault point and transformer station's signal is infused
The distance between access point.
(6) basisL max With the shaft tower information of transmission line of electricity, show that the corresponding shaft tower number in position occurs for ground connection arcing fault.
Claims (2)
1. a kind of transmission line of electricity based on optical fiber sensing technology is grounded arcing fault localization method, which is characterized in that the method
Using the existing OPGW optical fiber of transmission line of electricity as sensor, the injected pulse laser signal in OPGW spare fibre channel leads to
Cross high-speed data acquiring device, real-time monitoring optical signal in communication process along it is rear to Rayleigh scattering light；In transmission line of electricity
When ground connection arcing fault occurs, OPGW shunts fault current, and the fault current of shunting generates high-intensity magnetic field, forceful electric power around OPGW
Field, TRANSIENT HIGH TEMPERATURE and electric power, and make the intensity of the backward Rayleigh scattering light of OPGW internal transmission light that acute variation occur, pass through
It changes the time delay at moment after acquisition to Rayleigh scattering luminous intensity, calculates transmission line of electricity and the specific of ground fault flashover occurs
Position, to realize the quick positioning of overhead transmission line ground connection arcing fault；
The method realizes that monitoring host is mounted in substation's computer room by monitoring host；Monitoring host includes that pulse swashs
Light generating unit, data acquisition unit, data analysis and processing unit；The pulse laser generating unit connects the spare light of OPGW
Fine and injected pulse laser signal, data acquisition unit connect OPGW optical fiber and acquire in real time after to Rayleigh scattering light intensity with
Optical signal delay time send the signal of acquisition to data analysis and processing unit；
The method utilizes collected backward Rayleigh scattering luminous intensity and delay time, calculates scattered light intensity and space bit
Relationship between setting forms scattered light signal signature waveform.
2. a kind of transmission line of electricity based on optical fiber sensing technology is grounded arcing fault localization method according to claim 1,
It is characterized in that, the time that the method is occurred using transmission line of electricity ground connection arcing fault, obtains the moment backward Rayleigh scattering light
The signature waveform of signal, distance Lmax corresponding to maximum light signal strength Pmax are to be grounded arcing fault point and substation
The distance between signal decanting point.
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| CN106443519B (en) * | 2016-09-27 | 2019-02-22 | 山东大学 | A kind of measuring system and method using magneto optic isolator detection magnetic field strength |
| CN108964279A (en) * | 2018-08-10 | 2018-12-07 | 国网湖北省电力有限公司孝感供电公司 | The acquisition device and method of a kind of transmission line of electricity substation terminal data |
| CN112578220B (en) * | 2020-11-26 | 2022-10-28 | 贵州电网有限责任公司 | Underground cable fault on-line positioning system and method |
| CN113092959B (en) * | 2021-03-31 | 2022-04-12 | 广东电网有限责任公司清远供电局 | Insulator pollution flashover monitoring method, device, equipment and storage medium |
| CN113092879B (en) * | 2021-03-31 | 2022-07-29 | 广东电网有限责任公司清远供电局 | Transmission line lightning stroke monitoring method, device, equipment and storage medium |
| CN113359211B (en) * | 2021-06-15 | 2022-06-14 | 武汉英泰晟视智感科技有限公司 | Bird damage monitoring method for whole-line power transmission line |
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| JPH05126895A (en) * | 1991-11-06 | 1993-05-21 | Tokyo Electric Power Co Inc:The | Method for detecting fault point of overhead transmission line |
| CN102820920A (en) * | 2012-08-20 | 2012-12-12 | 慈溪市供电局 | Fault point localizing method and device |
| CN102879706A (en) * | 2012-10-24 | 2013-01-16 | 上海市电力公司 | Optical fiber bending loss principle-based wire strand breakage and damage detection method |
| CN103557883B (en) * | 2013-09-09 | 2015-11-18 | 华北电力大学（保定） | A kind of comprehensive monitoring of sea floor optoelectronic composite cable and trouble spot Exact Location Method |
| CN104089634B (en) * | 2014-07-07 | 2016-08-17 | 电子科技大学 | A kind of power transmission cable is waved and icing remote online monitoring system and monitoring method |
| CN104457594B (en) * | 2014-12-04 | 2016-04-06 | 云南电网有限责任公司昭通供电局 | The distributed icing monitoring method of a kind of transmission line of electricity |
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| 光时域反射技术的发展现状及其在电力领域中的应用;臧革伟 等;《现代科学仪器》;20130430(第2013年02期);20-23 |
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