CN106324433B - A kind of distribution line Quick overhaul method - Google Patents
A kind of distribution line Quick overhaul method Download PDFInfo
- 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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- Prior art keywords
- cable
- distribution line
- radiation
- difference
- measurement transducer
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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
A kind of distribution line Quick overhaul method, it cuts and docks including failure cable, multiple spot is symmetrical and asymmetric radiation measures, radiation sensitive difference calculates, and time between overhauls(TBO) inner curve is drawn in distribution line failure judgement, completion maintenance and etc., it can be realized distribution line Quick overhaul, real-time measurement overhauls cable run quality, and distribution line is stablized after maintenance.
Description
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. a kind of distribution line Quick overhaul method, which is characterized in that 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 second
Faulty line part on cable；
(2) the first cable and the corresponding conductor thread core of the second cable are docked, and using insulating materials to docking after
Conductor thread core coated；
(3) the docking point length apart from conductor thread core is symmetrical point at the position of a respectively on the first cable and the second cable
First radiation measurement transducer and the second radiation measurement transducer are not set, on the first cable and the second cable and separate
On the direction of docking point, the first radiation measurement transducer of distance and the second radiation measurement transducer length are the position of b and c respectively
Third radiation measurement transducer and the 4th radiation measurement transducer is arranged, wherein c > b > 1.2a in place；
(4) corresponding radiation value is measured by the first, second, third and fourth radiation measurement transducer, wherein the first and second actinometry passes
Sensor is primary every 15s measurement, respectively obtains the first and second radiation after every measurement 4 times this 4 times measured value being averaged respectively
Sensing value F1 and F2；Third and fourth radiation measurement transducer is primary every 30s measurement, every respectively to measure 2 times for this 2 measurements
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 exists
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 exists
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 there are failure, return steps (1) otherwise to enter for distribution line
Step (8)；
(8) step (1)-(7) are repeated, it, will until failure is all not present in distribution line within the preset power distribution line maintenance period
Radiation sensitive value F1, F2, F3, F4 and difference m in step (4)-(7)1, m2, m3, m4It is stored, and is drawn respectively respectively
System is shown with the curve graph of time change.
2. the method as described in claim 1, it is characterised in that: insulating materials is insulating tape.
3. the method as described in claim 1, it is characterised in that: a=6cm, b=7.5cm, c=8cm.
4. the method as described in claim 1, it is characterised in that: step (8) further includes appraisal procedure: by curve graph to distribution
Line maintenance quality is assessed.
5. the method as described in claim 1, it is characterised in that: the preset power distribution line maintenance period 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 |
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| 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 CN106324433A (en) | 2017-01-11 |
| CN106324433B true CN106324433B (en) | 2019-01-01 |
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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 |
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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 |
| 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 |
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| CN106324433A (en) | 2017-01-11 |
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