CN106324433A - Quick maintenance method for power distribution line - Google Patents

Quick maintenance method for power distribution line Download PDF

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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
value
difference
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Application number
CN201610780707.8A
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Chinese (zh)
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CN106324433B (en
Inventor
王力
徐珂
韩岩
李继攀
王治国
谢芳
张建文
张国营
刘少坤
Original Assignee
国网山东省电力公司菏泽供电公司
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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08Locating faults in cables, transmission lines, or networks
    • G01R31/081Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/086Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/02Methods 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

A kind of distribution line Quick overhaul method
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.
CN201610780707.8A 2016-08-31 2016-08-31 A kind of distribution line Quick overhaul method Active CN106324433B (en)

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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
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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
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
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