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CN106324433B - A kind of distribution line Quick overhaul method - Google Patents

A kind of distribution line Quick overhaul method Download PDF

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Publication number
CN106324433B
CN106324433B CN201610780707.8A CN201610780707A CN106324433B CN 106324433 B CN106324433 B CN 106324433B CN 201610780707 A CN201610780707 A CN 201610780707A CN 106324433 B CN106324433 B CN 106324433B
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China
Prior art keywords
cable
radiation
distribution line
difference
maintenance
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CN106324433A (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
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Heze Power Supply Co of State Grid Shandong Electric Power Co Ltd
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Heze Power Supply Co of State Grid Shandong Electric Power Co Ltd
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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

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Locating Faults (AREA)

Abstract

一种配电线路快速检修方法，包括故障电缆切割对接，多点对称和非对称辐射测量，辐射感测差值计算，配电线路故障判断，绘制检修周期内曲线，完成检修等步骤，能够实现配电线路快速检修，实时测量检修电缆线路质量，检修后配电线路稳定。

A rapid maintenance method for a distribution line, including the steps of cutting and butt-joining faulty cables, multi-point symmetric and asymmetric radiation measurement, radiation sensing difference calculation, power distribution line fault judgment, drawing a curve within the maintenance period, and completing the maintenance, etc. Rapid maintenance of power distribution lines, real-time measurement and maintenance of the quality of cable lines, and stable power distribution lines after maintenance.

Description

A kind of distribution line Quick overhaul method
Technical field
The present invention relates to electrical equipment technical fields, and in particular to a kind of distribution line Quick overhaul method.
Background technique
The progress of science and technology and economic rapid development, society rapidly increases power demand, however as power distribution network The continuous development of cable process, distribution network line structure become increasingly complex, and branched line is various, for power distribution network power supply performance Reliable and stable requirement it is higher and higher, while requirement of the user for power quality and service is also being continuously improved.
Currently, mostly using the mode manually checked for the maintenance mode of distribution line, needs to configure a large amount of route and patrol Depending on and investigation officer, and when being repaired to faulty line, since line fault, cable run length are inadequate, Mostly use artificial mode to make line cord connector at the scene, by destroy line cord insulating layer, by conductor thread core into Row cutting docking, is then wound by insulating materials.The cable of cable run and work production after manually overhauling Route is compared, and capability and performance is significant lower, and the quality of cable run after maintenance is unable to measure, high load capacity and long-time Work so that the probability of route to go wrong is multiplied.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide one kind can be realized distribution line Quick overhaul, Real-time measurement overhauls cable run quality, the stable distribution line Quick overhaul method of distribution line after maintenance.
The present invention provides a kind of distribution line Quick overhaul methods, in turn include the following steps:
(1) failure cable in distribution line is subjected to cutting and forms the first cable and the second cable, reject the first cable and Faulty line part on second cable；
(2) the first cable and the corresponding conductor thread core of the second cable are docked, and using insulating materials to right Conductor thread core after connecing is coated；
(3) the docking point length apart from conductor thread core is at the position of a, symmetrically respectively on the first cable and the second cable The first radiation measurement transducer and the second radiation measurement transducer is respectively set, on the first cable and the second cable and On direction far from docking point, the first radiation measurement transducer of distance and the second radiation measurement transducer length are b's and c respectively At position, third radiation measurement transducer and the 4th radiation measurement transducer are set, wherein c > b > 1.2a；
(4) corresponding radiation value is measured by the first, second, third and fourth radiation measurement transducer, wherein the first and second radiation is surveyed Quantity sensor is primary every 15s measurement, respectively obtains first and second after every measurement 4 times this 4 times measured value being averaged respectively Radiation sensitive value F1 and F2；Third and fourth radiation measurement transducer is primary every 30s measurement, and every measurement 2 times is by this 2 times respectively Measured value respectively obtains third and fourth radiation sensitive value F3 and F4 after averaging；
(5) the difference m of radiation sensitive value F1 and F2 is calculated1If difference m1Greater than preset threshold, then it is assumed that distribution line There are failure, return step (1) otherwise enters step (6)；
(6) the difference m for comparing radiation sensitive value F3 and F4 is calculated2If difference m2> (c-b) λ, then it is assumed that distribution line There are failure, return step (1) otherwise enters step (7), and wherein λ is that unit radiates increment；
(7) the difference m of radiation sensitive value F3 and F1 is calculated3And the difference m of radiation sensitive value F4 and F24If metAndWhen, then it is assumed that distribution line is there are failure, return step (1), otherwise into Enter step (8)；
(8) step (1)-(7) are repeated, until event is all not present in distribution line within the preset power distribution line maintenance period Barrier, by radiation sensitive value F1, F2, F3, F4 and difference m in step (4)-(7)1, m2, m3, m4It is stored respectively, and point It Hui Zhi not be shown with the curve graph of time change.
Preferably, insulating materials is insulating tape.
Preferably, a=6cm, b=7.5cm, c=8cm.
Preferably, step (8) further includes appraisal procedure: being assessed by curve graph power distribution line maintenance quality.
Preferably, the preset power distribution line maintenance period is 2h.
Distribution line Quick overhaul method of the invention, may be implemented:
1) a kind of new repair quality judgment mode is provided, traditional voltage difference measurement method is different from, so that judgement Accuracy rate it is higher so that power distribution line maintenance is relatively reliable.
2) it can be realized distribution line Quick overhaul, real-time measurement overhauls cable run quality, and distribution line is steady after maintenance It is fixed.
Detailed description of the invention
Fig. 1 is power distribution line maintenance schematic diagram
Fig. 2 is distribution line Quick overhaul method flow schematic diagram
Specific embodiment
The following detailed description of specific implementation of the invention, it is necessary to it is indicated herein to be, implement to be only intended to this hair below Bright further explanation, should not be understood as limiting the scope of the invention, and field person skilled in the art is according to above-mentioned Some nonessential modifications and adaptations that summary of the invention makes the present invention, still fall within protection scope of the present invention.
The present invention provides a kind of distribution line Quick overhaul method, successively include the following steps: as shown in Figure 1, 2, it will Failure cable carries out cutting and forms the first cable 1 and the second cable 2 in distribution line, rejects on the first cable 1 and the second cable 2 Faulty line part；First cable 1 and the corresponding conductor thread core 3 of the second cable 2 are docked, and utilize insulating materials Conductor thread core 3 after docking is coated, insulating materials can be insulating tape etc..Distribution line after cladding maintenance Cable is if performance is normal, other interference radiation of outside received at close positions, and leading after the preceding or energization that is powered The radiation that body core generates all should be identical, then can be on the first cable 1 and the second cable 2 respectively apart from conductor thread core 3 Docking point length be a position at, the first radiation measurement transducer 5 and the second radiation measurement transducer is symmetrically respectively set 6, on the first cable 1 and the second cable 2, and on the direction far from docking point, the first actinometry of distance is sensed respectively Device 5 and 6 length of the second radiation measurement transducer are that third radiation measurement transducer 7 and the 4th radiation is arranged at the position of b and c Measurement sensor 8, wherein c > b > 1.2a, in a preferred example, a 6cm, b=7.5cm, c=8cm.
If docking is normal, the radiation corresponded at the position of two sides should be identical, then the first radiation is surveyed Symmetrically setting can be used to be compared to each other and whether consistent determine that maintenance is for quantity sensor 5 and the second radiation measurement transducer 6 It is no reliable, if being in addition only symmetrical maintenance, then docking point may be appeared in due to docking problem and generates abnormal spoke The radiation penetrated, but received for symmetrically arranged first radiation measurement transducer 5 and the second radiation measurement transducer 6 It is identical, therefore asymmetrical setting third radiation measurement transducer 7 and the 4th radiation measurement transducer 8 is also needed to tie respectively The value for closing the first radiation measurement transducer 5 and the second radiation measurement transducer 6 is compared, right to confirm whether docking is correct Whether the line cord after connecing is stable and reliable for performance, particularly by the measurement pair of the first, second, third and fourth radiation measurement transducer The radiation value answered, wherein the first and second radiation measurement transducer is primary every 15s measurement, it is every respectively to measure 4 times for this 4 surveys Magnitude respectively obtains the first and second radiation sensitive value F1 and F2 after averaging；Third and fourth radiation measurement transducer is surveyed every 30s Amount is primary, respectively obtains third and fourth radiation sensitive value F3 and F4 after every measurement 2 times this 2 times measured value being averaged respectively.
Difference and error ratio are calculated separately by following several ways to judge distribution line with the presence or absence of failure:
A. the difference m of radiation sensitive value F1 and F2 is calculated1If difference m1Greater than preset threshold, then it is assumed that distribution line is deposited In failure；
B. the difference m for comparing radiation sensitive value F3 and F4 is calculated2If difference m2> (c-b) λ, then it is assumed that distribution line There are failures, and wherein λ is that unit radiates increment；
C. the difference m of radiation sensitive value F3 and F1 is calculated3And the difference m of radiation sensitive value F4 and F24If metAndWhen, then it is assumed that there are failures for distribution line；
When all failure is not present in distribution line within the preset power distribution line maintenance period, by radiation sensitive value F1, F2, F3, F4 and difference m1, m2, m3, m4It is stored, and is drawn respectively as the curve graph of time change is shown respectively, Intuitively the situation in this time between overhauls(TBO) can be shown, convenient for being evaluated for the quality overhauled, and after being Continuous research provides data.
Although for illustrative purposes, it has been described that exemplary embodiments of the present invention, those skilled in the art Member it will be understood that, can be in form and details in the case where the scope and spirit for not departing from invention disclosed in appended claims On the change that carry out various modifications, add and replace etc., and all these changes all should belong to appended claims of the present invention Protection scope, and each step in the claimed each department of product and method, can in any combination Form is combined.Therefore, to disclosed in this invention the description of embodiment be not intended to limit the scope of the invention, But 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)

1.一种配电线路快速检修方法，其特征在于，依次包括如下步骤：1. a method for quick maintenance of power distribution lines, is characterized in that, comprises the following steps successively: (1)将配电线路中故障电缆进行切割形成第一电缆和第二电缆，剔除第一电缆和第二电缆上故障线路部分；(1) The faulty cable in the distribution line is cut to form the first cable and the second cable, and the faulty line part on the first cable and the second cable is eliminated; (2)将第一电缆和第二电缆分别对应的导体线芯进行对接，并利用绝缘材料对对接后的导体线芯进行包覆；(2) the conductor cores corresponding to the first cable and the second cable respectively are butted, and the butt-jointed conductor cores are covered with an insulating material; (3)在第一电缆和第二电缆上分别距离导体线芯的对接点长度为a的位置处，对称的分别设置第一辐射测量传感器和第二辐射测量传感器，在第一电缆和第二电缆上并且在远离对接点的方向上，分别距离第一辐射测量传感器和第二辐射测量传感器长度为b和c的位置处，设置第三辐射测量传感器和第四辐射测量传感器，其中c>b>1.2a；(3) On the first cable and the second cable, the first and second radiation measurement sensors are symmetrically arranged at positions a distance from the butt joints of the conductor cores, respectively, and the first and second radiation measurement sensors are arranged symmetrically. On the cable and in the direction away from the docking point, at positions of lengths b and c from the first and second radiometric sensors, respectively, a third radiometric sensor and a fourth radiometric sensor are provided, where c>b>;1.2a; (4)通过第一、二、三、四辐射测量传感器测量对应的辐射值，其中第一、二辐射测量传感器每隔15s测量一次，分别每测量4次将此4次的测量值求平均值后分别得到第一、二辐射感测值F1和F2；第三、四辐射测量传感器每隔30s测量一次，分别每测量2次将此2次的测量值求平均值后分别得到第三、四辐射感测值F3和F4；(4) The corresponding radiation values are measured by the first, second, third and fourth radiation measurement sensors, wherein the first and second radiation measurement sensors measure once every 15s, and the 4 measured values are averaged every 4 times respectively. Then, the first and second radiation sensing values F1 and F2 are obtained respectively; the third and fourth radiation measuring sensors are measured every 30s, and the third and fourth measurement values are averaged for every two measurements, respectively. Radiation sensing values F3 and F4; (5)计算辐射感测值F1和F2的差值m1，如果差值m1大于预设阈值，则认为配电线路存在故障，返回步骤(1)，否则进入步骤(6)；(5) Calculate the difference m 1 between the radiation sensing values F1 and F2, if the difference m 1 is greater than the preset threshold, it is considered that there is a fault in the distribution line, and return to step (1), otherwise go to step (6); (6)计算比较辐射感测值F3和F4的差值m2，如果差值m2>(c-b)·λ，则认为配电线路存在故障，返回步骤(1)，否则进入步骤(7)，其中λ为单位辐射增量；(6) Calculate and compare the difference m 2 between the radiation sensing values F3 and F4. If the difference m 2 >(cb)·λ, it is considered that there is a fault in the distribution line, and return to step (1), otherwise go to step (7) ), where λ is the unit radiation increment; (7)计算辐射感测值F3和F1的差值m3，以及辐射感测值F4和F2的差值m4，如果满足且时，则认为配电线路存在故障，返回步骤(1)，否则进入步骤(8)；(7) Calculate the difference m 3 between the radiation sensing values F3 and F1, and the difference m 4 between the radiation sensing values F4 and F2, if the and If the power distribution line is faulty, return to step (1), otherwise go to step (8); (8)重复步骤(1)-(7)，直到在预置的配电线路检修周期内配电线路都不存在故障，将步骤(4)-(7)中的辐射感测值F1、F2、F3、F4，以及差值m1，m2，m3，m4分别进行存储，并分别绘制随着时间变化的曲线图进行显示。(8) Repeat steps (1)-(7) until there is no fault in the distribution line within the preset distribution line maintenance cycle, and compare the radiation sensing values F1 and F2 in steps (4)-(7). , F3, F4, and the difference values m 1 , m 2 , m 3 , and m 4 are stored separately, and graphs that change with time are drawn respectively for display. 2.如权利要求1所述的方法，其特征在于：绝缘材料为绝缘胶带。2. The method of claim 1, wherein the insulating material is insulating tape. 3.如权利要求1所述的方法，其特征在于：a＝6cm，b＝7.5cm，c＝8cm。3. The method of claim 1, wherein a=6cm, b=7.5cm, and c=8cm. 4.如权利要求1所述的方法，其特征在于：步骤(8)还包括评估步骤：通过曲线图对配电线路检修质量进行评估。4. The method according to claim 1, characterized in that: step (8) further comprises an evaluation step: evaluating the maintenance quality of the distribution line through a graph. 5.如权利要求1所述的方法，其特征在于：所述预置的配电线路检修周期为2h。5 . The method of claim 1 , wherein the preset distribution line maintenance cycle is 2h. 6 .
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