CN106324433A - Quick maintenance method for power distribution line - Google Patents
Quick maintenance method for power distribution line Download PDFInfo
- Publication number
- CN106324433A CN106324433A CN201610780707.8A CN201610780707A CN106324433A CN 106324433 A CN106324433 A CN 106324433A CN 201610780707 A CN201610780707 A CN 201610780707A CN 106324433 A CN106324433 A CN 106324433A
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- CN
- China
- Prior art keywords
- cable
- distribution line
- radiation
- measurement transducer
- difference
- Prior art date
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Classifications
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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
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
Abstract
The invention discloses a quick maintenance method for a power distribution line, and the method comprises the steps: fault cable cutting and butt joint, multipoint symmetry and asymmetry radiation measurement, radiation sensing difference calculation, power distribution line fault judgment, the drawing of a curve in a maintenance period, and maintenance completing. The method can achieve the quick maintenance of the power transmission line, measures the quality of a cable line in real time, and enables the power transmission line to be stable after maintenance.
Description
Technical field
The present invention relates to electrical equipment technical field, be specifically related to a kind of distribution line Quick overhaul method.
Background technology
The progress of science and technology and economic developing rapidly, society increases for power demand, rapidly however as power distribution network
The development of cable process, distribution network line structure becomes increasingly complex, and branched line is various, for power distribution network power supply performance
Reliable and stable requirement more and more higher, user is also improving constantly for the requirement of power quality and service simultaneously.
The mode manually investigated currently for the many employings of maintenance mode of distribution line, needs to configure substantial amounts of circuit and patrols
Depending on and investigation personnel, and when faulty line is keeped in repair, due to line fault, the cable run length situation such as not,
The artificial mode of many employings makes line cord joint at the scene, by destroying the insulating barrier of line cord, is entered by conductor thread core
Row cutting docking, is then wound by insulant.Cable run after artificial maintenance and the cable of work making
Circuit is compared, and its capability and performance is significant lower, and cannot measure for the quality of cable run after maintenance, and high load capacity is with long-time
Work the probability gone wrong of circuit is multiplied.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that one is capable of distribution line Quick overhaul,
Measure maintenance cable run quality, the distribution line Quick overhaul method that after maintenance, distribution line is stable in real time.
The invention provides a kind of distribution line Quick overhaul method, in turn include the following steps:
(1) failure cable in distribution line is carried out cutting and forms the first cable and the second cable, reject the first cable and
Faulty line part on second cable；
(2) conductor thread core corresponding respectively to the first cable and the second cable is docked, and utilize insulant to right
Conductor thread core after connecing is coated with；
(3) respectively apart from the position of a length of a of docking point of conductor thread core, symmetry on the first cable and the second cable
Be respectively provided with the first radiation measurement transducer and the second radiation measurement transducer, on the first cable and the second cable and
Away from the direction of docking point, distance the first radiation measurement transducer and a length of b and c of the second radiation measurement transducer respectively
Position, arranges the 3rd radiation measurement transducer and the 4th radiation measurement transducer, wherein c > b > 1.2a；
(4) measuring corresponding radiation value by first, second, third and fourth radiation measurement transducer, wherein first and second radiation is surveyed
Quantity sensor is measured once every 15s, the most often measures and respectively obtains first and second after being averaged by this measured value of 4 times for 4 times
Radiation sensitive value F1 and F2；Third and fourth radiation measurement transducer is measured once every 30s, respectively the most often measures 2 times by these 2 times
Measured value respectively obtains third and fourth radiation sensitive value F3 and F4 after averaging；
(5) radiation sensitive value F1 and difference m of F2 are calculated1If, difference m1More than predetermined threshold value, then it is assumed that distribution line
There is fault, return step (1), otherwise enter step (6)；
(6) difference m of radiation sensitive value F3 and F4 is compared in calculating2If, difference m2> (c-b) λ, then it is assumed that distribution line
There is fault, return step (1), otherwise enter step (7), wherein λ is that unit radiates increment；
(7) radiation sensitive value F3 and difference m of F1 are calculated3, and radiation sensitive value F4 and difference m of F24If metAndTime, then it is assumed that there is fault in distribution line, returns step (1), otherwise enter
Step (8)；
(8) step (1)-(7) are repeated, until distribution line does not the most exist event within the preset power distribution line maintenance cycle
Barrier, by radiation sensitive value F1 in step (4)-(7), F2, F3, F4, and difference m1, m2, m3, m4Store respectively, and point
Do not draw the curve chart changed over time to show.
Preferably, insulant is insulating tape.
Preferably, a=6cm, b=7.5cm, c=8cm.
Preferably, step (8) also includes appraisal procedure: be estimated power distribution line maintenance quality by curve chart.
Preferably, the described preset power distribution line maintenance cycle is 2h.
The distribution line Quick overhaul method of the present invention, it is possible to achieve:
1) provide a kind of new repair quality judgment mode, be different from traditional voltage difference metering system so that judge
Accuracy rate higher so that power distribution line maintenance is relatively reliable.
2) being capable of distribution line Quick overhaul, measure maintenance cable run quality in real time, after maintenance, distribution line is steady
Fixed.
Accompanying drawing explanation
Fig. 1 is power distribution line maintenance schematic diagram
Fig. 2 is distribution line Quick overhaul method flow schematic diagram
Detailed description of the invention
Being embodied as the following detailed description of the present invention, it is necessary to it is pointed out here that, below implement to be only intended to this
Bright further illustrates, it is impossible to be interpreted as limiting the scope of the invention, and this art skilled person is according to above-mentioned
Some nonessential improvement and adjustment that the present invention is made by summary of the invention, still fall within protection scope of the present invention.
The invention provides a kind of distribution line Quick overhaul method, comprise the following steps: successively as shown in Figure 1, 2, will
In distribution line, failure cable carries out cutting and forms the first cable 1 and the second cable 2, rejects on the first cable 1 and the second cable 2
Faulty line part；Conductor thread core 3 corresponding respectively to first cable 1 and the second cable 2 is docked, and utilizes insulant
Being coated with the conductor thread core 3 after docking, insulant can be insulating tape etc..Distribution line after cladding maintenance
If cable performance is normal, other interference radiation of the outside received at close positions, and leading before energising or after energising
The radiation that body core produces all should be identical, then can be respectively apart from conductor thread core 3 on the first cable 1 and the second cable 2
The position of a length of a of docking point, symmetrical is respectively provided with the first radiation measurement transducer 5 and the second radiation measurement transducer
6, on the first cable 1 and the second cable 2, and away from the direction of docking point, distance the first actinometry senses respectively
Device 5 and the position of the second a length of b and c of radiation measurement transducer 6, arrange the 3rd radiation measurement transducer 7 and the 4th radiation
Measure sensor 8, wherein c > b > 1.2a, in a preferred example, a is 6cm, b=7.5cm, c=8cm.
If docking is normal, then the radiation of the position of corresponding both sides should be identical, then the first radiation is surveyed
Quantity sensor 5 can be used to the setting of the second radiation measurement transducer 6 symmetry to be compared to each other and the most consistent determines that maintenance is
No reliably, if being only additionally symmetrical maintenance, be then likely to be due to docking problem and occur in docking point and produce abnormal spoke
Penetrate, but the radiation received for symmetrically arranged first radiation measurement transducer 5 and the second radiation measurement transducer 6
It is identical, therefore also needs to asymmetrical arrange the 3rd radiation measurement transducer 7 and the 4th radiation measurement transducer 8 is tied respectively
The value closing the first radiation measurement transducer 5 and the second radiation measurement transducer 6 compares, and confirms to dock the most correctly, right
Line cord after connecing is the most stable and reliable for performance, and it is right to measure particularly by first, second, third and fourth radiation measurement transducer
The radiation value answered, wherein first and second radiation measurement transducer is measured once every 15s, the most often measures 4 times by this survey of 4 times
Value respectively obtains first and second radiation sensitive value F1 and F2 after averaging；Third and fourth radiation measurement transducer is surveyed every 30s
Amount once, is the most often measured and is respectively obtained third and fourth radiation sensitive value F3 and F4 after being averaged by this measured value of 2 times for 2 times.
Calculate difference respectively by following several ways and error ratio judge whether distribution line exists fault:
A. radiation sensitive value F1 and difference m of F2 are calculated1If, difference m1More than predetermined threshold value, then it is assumed that distribution line is deposited
In fault；
B. difference m comparing radiation sensitive value F3 and F4 is calculated2If, difference m2> (c-b) λ, then it is assumed that distribution line
There is fault, wherein λ is that unit radiates increment；
C. radiation sensitive value F3 and difference m of F1 are calculated3, and radiation sensitive value F4 and difference m of F24If metAndTime, then it is assumed that there is fault in distribution line；
When there is not fault in distribution line within the preset power distribution line maintenance cycle, by radiation sensitive value F1, F2,
F3, F4, and difference m1, m2, m3, m4Store respectively, and draw the curve chart changed over time respectively and show,
Intuitively the situation in this time between overhauls(TBO) can be shown, it is simple to the quality for overhauling is evaluated, and after can being
Continuous research provides data.
Although for illustrative purposes, it has been described that the illustrative embodiments of the present invention, but those skilled in the art
Member, can be in form and details it will be appreciated that in the case of without departing from the scope and spirit of the invention disclosed in claims
On carry out various amendment, add and the change of replacement etc., and all these change all should belong to claims of the present invention
Each step in protection domain, and each department of claimed product and method, can in any combination
Form is combined.Therefore, the description to the embodiment that disclosed in this invention is not intended to limit the scope of the present invention,
But be used for describing the present invention.Correspondingly, the scope of the present invention is not limited by embodiment of above, but by claim or
Its equivalent is defined.
Claims (5)
1. a distribution line Quick overhaul method, it is characterised in that in turn include the following steps:
(1) failure cable in distribution line is carried out cutting and form the first cable and the second cable, reject the first cable and second
Faulty line part on cable；
(2) conductor thread core that the first cable and the second cable are corresponding respectively is docked, and after utilizing insulant to docking
Conductor thread core be coated with；
(3) respectively apart from the position of a length of a of docking point of conductor thread core on the first cable and the second cable, dividing of symmetry
First radiation measurement transducer and the second radiation measurement transducer are not set, on the first cable and the second cable and away from
On the direction of docking point, distance the first radiation measurement transducer and the position of a length of b and c of the second radiation measurement transducer respectively
Place, arranges the 3rd radiation measurement transducer and the 4th radiation measurement transducer, wherein c > b > 1.2a；
(4) measuring corresponding radiation value by first, second, third and fourth radiation measurement transducer, wherein first and second actinometry passes
Sensor is measured once every 15s, the most often measures and respectively obtains first and second radiation after being averaged by this measured value of 4 times for 4 times
Sensing value F1 and F2；Third and fourth radiation measurement transducer is measured once every 30s, the most often measures 2 times by this measurement of 2 times
Value respectively obtains third and fourth radiation sensitive value F3 and F4 after averaging；
(5) radiation sensitive value F1 and difference m of F2 are calculated1If, difference m1More than predetermined threshold value, then it is assumed that distribution line exists
Fault, returns step (1), otherwise enters step (6)；
(6) difference m of radiation sensitive value F3 and F4 is compared in calculating2If, difference m2> (c-b) λ, then it is assumed that distribution line exists
Fault, returns step (1), otherwise enters step (7), and wherein λ is that unit radiates increment；
(7) radiation sensitive value F3 and difference m of F1 are calculated3, and radiation sensitive value F4 and difference m of F24If metAndTime, then it is assumed that there is fault in distribution line, returns step (1), otherwise enter
Step (8)；
(8) step (1)-(7) are repeated, until the most there is not fault in distribution line within the preset power distribution line maintenance cycle, will
Radiation sensitive value F1 in step (4)-(7), F2, F3, F4, and difference m1, m2, m3, m4Store respectively, and paint respectively
The curve chart that system changes over time shows.
2. the method for claim 1, it is characterised in that: insulant is insulating tape.
3. the method for claim 1, it is characterised in that: a=6cm, b=7.5cm, c=8cm.
4. the method for claim 1, it is characterised in that: step (8) also includes appraisal procedure: by curve chart to distribution
Line maintenance quality is estimated.
5. method as claimed in claim 5, it is characterised in that: the described preset power distribution line maintenance cycle is 2h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610780707.8A CN106324433B (en) | 2016-08-31 | 2016-08-31 | A kind of distribution line Quick overhaul method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610780707.8A CN106324433B (en) | 2016-08-31 | 2016-08-31 | A kind of distribution line Quick overhaul method |
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| CN106324433A true CN106324433A (en) | 2017-01-11 |
| CN106324433B CN106324433B (en) | 2019-01-01 |
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Citations (8)
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|---|---|---|---|---|
| CN1675559A (en) * | 2002-06-20 | 2005-09-28 | Abb股份有限公司 | Fault location using measurements of current and voltage from one end of a line |
| WO2011083908A2 (en) * | 2010-01-11 | 2011-07-14 | No Yun Keun | Steel box continuous bridge having an asymmetric span, and method for constructing same |
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| CN102646967A (en) * | 2012-05-04 | 2012-08-22 | 清华大学 | Unsymmetrical fault relay protection method of distributing line |
| CN102830328A (en) * | 2012-08-23 | 2012-12-19 | 上海交通大学 | Distributed fault location method for T-circuit |
| CN103389514A (en) * | 2013-07-18 | 2013-11-13 | 中国科学院地质与地球物理研究所 | MT (magnetotelluric) denoising device and method |
| CN104198887A (en) * | 2014-08-19 | 2014-12-10 | 国家电网公司 | Fault distance measurement method based on double symmetric check points |
| CN105223449A (en) * | 2015-10-28 | 2016-01-06 | 中国南方电网有限责任公司电网技术研究中心 | A kind of asymmetric power transmission line parameter online measurement method |
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2016
- 2016-08-31 CN CN201610780707.8A patent/CN106324433B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1675559A (en) * | 2002-06-20 | 2005-09-28 | Abb股份有限公司 | Fault location using measurements of current and voltage from one end of a line |
| WO2011083908A2 (en) * | 2010-01-11 | 2011-07-14 | No Yun Keun | Steel box continuous bridge having an asymmetric span, and method for constructing same |
| CN102253311A (en) * | 2011-05-20 | 2011-11-23 | 深圳市双合电气股份有限公司 | Method for measuring distance between two ends based on real-time circuit parameter measurement |
| CN102646967A (en) * | 2012-05-04 | 2012-08-22 | 清华大学 | Unsymmetrical fault relay protection method of distributing line |
| CN102830328A (en) * | 2012-08-23 | 2012-12-19 | 上海交通大学 | Distributed fault location method for T-circuit |
| CN103389514A (en) * | 2013-07-18 | 2013-11-13 | 中国科学院地质与地球物理研究所 | MT (magnetotelluric) denoising device and method |
| CN104198887A (en) * | 2014-08-19 | 2014-12-10 | 国家电网公司 | Fault distance measurement method based on double symmetric check points |
| CN105223449A (en) * | 2015-10-28 | 2016-01-06 | 中国南方电网有限责任公司电网技术研究中心 | A kind of asymmetric power transmission line parameter online measurement method |
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