CN102540020A - Method for improving fault positioning precision of power transmission line by adopting online wave speed measurement technology - Google Patents

Method for improving fault positioning precision of power transmission line by adopting online wave speed measurement technology Download PDF

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Publication number
CN102540020A
CN102540020A CN2012100462887A CN201210046288A CN102540020A CN 102540020 A CN102540020 A CN 102540020A CN 2012100462887 A CN2012100462887 A CN 2012100462887A CN 201210046288 A CN201210046288 A CN 201210046288A CN 102540020 A CN102540020 A CN 102540020A
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CN
China
Prior art keywords
wave
monitoring
wave speed
traveling wave
transmission line
Prior art date
Application number
CN2012100462887A
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Chinese (zh)
Inventor
李鑫
彭向阳
姚森敬
钱冠军
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广东电网公司电力科学研究院
武汉三相电力科技有限公司
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Application filed by 广东电网公司电力科学研究院, 武汉三相电力科技有限公司 filed Critical 广东电网公司电力科学研究院
Priority to CN2012100462887A priority Critical patent/CN102540020A/en
Publication of CN102540020A publication Critical patent/CN102540020A/en

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Abstract

The invention provides a method for improving the fault positioning precision of a power transmission line by adopting an online wave speed measurement technology. According to the method, monitoring devices of two adjacent monitoring points on the line are used for monitoring fault traveling waves, so that the time difference of the same traveling wave reaching the two monitoring points is obtained, and the traveling wave speed is calculated, thus the online measurement of the traveling wave speed is realized. According to the method, the fault traveling wave speed is measured in an online manner, so that the actual wave speed of the traveling wave is obtained, and the wave speed error is reduced, thus an error caused by fault positioning is reduced, and the fault positioning precision is improved. The method has the advantages of simplicity, and easiness for implementation.

Description

Adopt the velocity of wave line Measurement Technique to improve the method for transmission line malfunction bearing accuracy
Technical field
The present invention relates to the method for a kind of transmission line malfunction location, especially relate to a kind of method that adopts the velocity of wave line Measurement Technique to improve the transmission line malfunction bearing accuracy.
Background technology
Transmission line of electricity has a very wide distribution, and it is with a varied topography to pass through the area, and weather conditions are changeable, cause the generation of fault easily.After transmission line of electricity breaks down, realize localization of fault fast and accurately, can reduce the time of line walking investigation trouble spot, alleviate operation maintenance personnel's workload, shorten failure recovery time, thereby reduce the economic loss that power off time caused.
At present, oneself has the document of a large amount of discussion transmission line malfunctions location to deliver both at home and abroad, and oneself drops into on-the-spot operation some fault location device.But in practical application owing to receive the influence of line-sag, factors such as row wave attenuation and velocity of wave error; Make the precision of localization of fault be still waiting further raising; Error 1 microsecond such as single-ended wave head will cause 300 meters positioning error, and row wavelength distance when transmission, wave form distortion makes wave head be difficult to accurate affirmation; The affirmation error of wave head is often in several microseconds, and then positioning error can be more than 1 kilometer; Fault traveling wave generally can change in the scope of 0.936-0.987c (c is the light velocity) in addition, and the velocity of wave error is 0.05c when supposing range finding, and the time difference that the row ripple is delivered to two ends is 100 microseconds, then can cause about 1500 meters error or the like.
When carrying out the transmission line malfunction location, fixing value of wave speed is set usually, and actual velocity of wave often changed in the past, therefore caused the velocity of wave error, influenced the localization of fault precision.
Summary of the invention
Technical matters to be solved by this invention just provides a kind of method that adopts the velocity of wave line Measurement Technique to improve the transmission line malfunction bearing accuracy.
For solving the problems of the technologies described above; Employing row wave-wave speed line Measurement Technique of the present invention improves the method for transmission line malfunction bearing accuracy; Said method is come on-line monitoring fault traveling wave signal through the monitoring device of two adjacent monitoring points on the circuit; Obtain the mistiming that same travelling wave signal arrives two monitoring points, calculate row wave-wave speed, thereby realize localization of fault.
Concrete steps comprise:
S1 is provided with two spacing L less than 30 meters monitoring point 1 and 2, on-line monitoring fault traveling wave signal on transmission line of electricity;
S2 calculates row wave-wave speed according to the mistiming of two monitoring points of same fault traveling wave signal arrival;
If the fault traveling wave signal arrives the time of monitoring point 1 and 2 and is respectively t1 and t2, judge that monitoring point 1 and 2 monitors the direction of same fault traveling wave signal, when sense is opposite, the opposite in sign of t1 and t2; When sense was identical, t1 was identical with the symbol of t2, mistiming △ t=|t1-t2| then, and the distance of two monitoring points is L, then the fault traveling wave velocity of wave that obtains of on-line measurement
v=L/△t;
S3 then the trouble spot apart from the distance=t1*v of monitoring point 1.
Monitoring device through two adjacent monitoring points 1 on the circuit and 2 comes on-line monitoring fault traveling wave signal, and the distance between two monitoring points should be suitable, makes the row ripple that bigger decay not take place.
Beneficial effect: this method is come on-line monitoring fault traveling wave signal through the monitoring device of two adjacent monitoring points on the circuit; Obtain the mistiming that same travelling wave signal arrives two monitoring points; And it is fast to calculate the actual velocity of wave of capable ripple with this; Reduce the velocity of wave error, reduced the error that localization of fault is brought, improved the precision of localization of fault.The process of measuring from online velocity of wave in addition, the advantage that this method has simply, is easy to realize.
Description of drawings
Accompanying drawing is that the present invention adopts capable wave-wave speed line Measurement Technique to improve the synoptic diagram of the method for transmission line malfunction bearing accuracy.
Embodiment
See also accompanying drawing, accompanying drawing is that the present invention adopts capable wave-wave speed line Measurement Technique to improve the method synoptic diagram of transmission line malfunction bearing accuracy.
The method that adopts row wave-wave speed line Measurement Technique to improve the transmission line malfunction bearing accuracy may further comprise the steps:
S1 is provided with two spacing L less than 30 meters monitoring point 1 and 2, on-line monitoring fault traveling wave signal on transmission line of electricity;
S2 calculates row wave-wave speed according to the mistiming of two monitoring points of same fault traveling wave signal arrival;
If the fault traveling wave signal arrives the time of monitoring point 1 and 2 and is respectively t1 and t2, judge that monitoring point 1 and 2 monitors the direction of same fault traveling wave signal, when sense is opposite, the opposite in sign of t1 and t2; When sense was identical, t1 was identical with the symbol of t2, mistiming △ t=|t1-t2| then, and the distance of two monitoring points is L, then the fault traveling wave velocity of wave that obtains of on-line measurement
v=L/△t;
S3 then the trouble spot apart from the distance=t1*v of monitoring point 1.

Claims (1)

1. adopt the velocity of wave line Measurement Technique to improve the method for transmission line malfunction bearing accuracy, it is characterized in that comprising the steps:
S1 is provided with two spacing L less than 30 meters monitoring point 1 and 2, on-line monitoring fault traveling wave signal on transmission line of electricity;
S2 calculates row wave-wave speed according to the mistiming of two monitoring points of same fault traveling wave signal arrival;
If the fault traveling wave signal arrives the time of monitoring point 1 and 2 and is respectively t1 and t2, judge that monitoring point 1 and 2 monitors the direction of same fault traveling wave signal, when sense is opposite, the opposite in sign of t1 and t2; When sense was identical, t1 was identical with the symbol of t2, mistiming △ t=|t1-t2| then, and the distance of two monitoring points is L, then the fault traveling wave velocity of wave that obtains of on-line measurement
v=L/△t;
S3 then the trouble spot apart from the distance=t1*v of monitoring point 1.
CN2012100462887A 2012-02-28 2012-02-28 Method for improving fault positioning precision of power transmission line by adopting online wave speed measurement technology CN102540020A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012100462887A CN102540020A (en) 2012-02-28 2012-02-28 Method for improving fault positioning precision of power transmission line by adopting online wave speed measurement technology

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012100462887A CN102540020A (en) 2012-02-28 2012-02-28 Method for improving fault positioning precision of power transmission line by adopting online wave speed measurement technology

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CN102540020A true CN102540020A (en) 2012-07-04

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102798804A (en) * 2012-08-20 2012-11-28 广州供电局有限公司 High-voltage power cable fault on-line positioning device
CN102809715A (en) * 2012-08-20 2012-12-05 广州供电局有限公司 On-line fault location device for high-voltage power cable
CN102818971A (en) * 2012-08-20 2012-12-12 广州供电局有限公司 High-voltage electric power cable fault on-line positioning device
CN103095527A (en) * 2013-01-05 2013-05-08 奇点新源国际技术开发(北京)有限公司 Method and system for measuring signal transmission time
CN104749490A (en) * 2015-04-14 2015-07-01 国家电网公司 Intelligent fault monitoring terminal and monitoring method thereof
CN105807182A (en) * 2016-03-11 2016-07-27 国网山西省电力公司运城供电公司 Double-end traveling wave fault positioning method of power transmission line
CN105807183A (en) * 2016-03-11 2016-07-27 国网山西省电力公司运城供电公司 Power transmission line fault positioning method based on non-contact sensor
CN109991520A (en) * 2019-03-19 2019-07-09 中国电力科学研究院有限公司 A kind of cable oscillation wave partial discharge detecting system velocity of wave New calculating method
CN110018399A (en) * 2019-05-15 2019-07-16 武汉康普常青软件技术股份有限公司 A kind of lightning fault localization method based on optical signal polarization state in transmission line of electricity OPGW

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CN1588101A (en) * 2004-09-30 2005-03-02 杨军 Accurately positioning method and device for underground layered power cable defect position
CN101231323A (en) * 2008-01-31 2008-07-30 钱冠军 Distributed high-precision transmission line travelling wave positioning system
CN101776725A (en) * 2010-01-13 2010-07-14 上海交通大学 Fault positioning method for transmission line

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CN1588101A (en) * 2004-09-30 2005-03-02 杨军 Accurately positioning method and device for underground layered power cable defect position
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CN101776725A (en) * 2010-01-13 2010-07-14 上海交通大学 Fault positioning method for transmission line

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102798804A (en) * 2012-08-20 2012-11-28 广州供电局有限公司 High-voltage power cable fault on-line positioning device
CN102809715A (en) * 2012-08-20 2012-12-05 广州供电局有限公司 On-line fault location device for high-voltage power cable
CN102818971A (en) * 2012-08-20 2012-12-12 广州供电局有限公司 High-voltage electric power cable fault on-line positioning device
CN102809715B (en) * 2012-08-20 2014-12-10 广州供电局有限公司 On-line fault location device for high-voltage power cable
CN102798804B (en) * 2012-08-20 2015-05-13 广州供电局有限公司 High-voltage power cable fault on-line positioning device
CN102818971B (en) * 2012-08-20 2015-05-13 广州供电局有限公司 High-voltage electric power cable fault on-line positioning device
CN103095527A (en) * 2013-01-05 2013-05-08 奇点新源国际技术开发(北京)有限公司 Method and system for measuring signal transmission time
CN104749490A (en) * 2015-04-14 2015-07-01 国家电网公司 Intelligent fault monitoring terminal and monitoring method thereof
CN105807182A (en) * 2016-03-11 2016-07-27 国网山西省电力公司运城供电公司 Double-end traveling wave fault positioning method of power transmission line
CN105807183A (en) * 2016-03-11 2016-07-27 国网山西省电力公司运城供电公司 Power transmission line fault positioning method based on non-contact sensor
CN105807182B (en) * 2016-03-11 2019-04-30 国网山西省电力公司运城供电公司 A kind of both-end traveling wave fault positioning method of transmission line of electricity
CN105807183B (en) * 2016-03-11 2019-04-30 国网山西省电力公司运城供电公司 A kind of power transmission line fault locating method based on noncontacting proximity sensor
CN109991520A (en) * 2019-03-19 2019-07-09 中国电力科学研究院有限公司 A kind of cable oscillation wave partial discharge detecting system velocity of wave New calculating method
CN110018399A (en) * 2019-05-15 2019-07-16 武汉康普常青软件技术股份有限公司 A kind of lightning fault localization method based on optical signal polarization state in transmission line of electricity OPGW

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