CN109085458A - The power failure recognition methods of low-voltage cable route - Google Patents
The power failure recognition methods of low-voltage cable route Download PDFInfo
- Publication number
- CN109085458A CN109085458A CN201810715944.5A CN201810715944A CN109085458A CN 109085458 A CN109085458 A CN 109085458A CN 201810715944 A CN201810715944 A CN 201810715944A CN 109085458 A CN109085458 A CN 109085458A
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- China
- Prior art keywords
- cable
- voltage
- low
- power failure
- recognition methods
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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
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
- G01R27/18—Measuring resistance to earth, i.e. line to ground
Abstract
The invention discloses a kind of power failure recognition methods of low-voltage cable route, multi-cable with unknown path trend, in the case where cable run has a power failure, apply voltage between the two-phase of the end of a cable, if measuring the application voltage between the head end and two-phase identical with end of cable, judge that the head end and end are located on same cable.It has as follows a little: the recognition methods is simple, convenient, effective, required at low cost.
Description
Technical field
The present invention relates to a kind of power failure recognition methods of low-voltage cable route.
Background technique
For the neat appearance in city, many overhead transmission lines have all carried out cable, while also reducing the failure rate of route,
Its mesolow 380V cable is connected to commercial center, means of transportation, residential building directly facing user, importance do not say and
Analogy.But since building time is longer, and early stage Utilities Electric Co. is relatively backward to the management regulation of low-voltage cable construction, perhaps
More low-voltage cable missing Sign Boards and path profile, with the quickening of infrastructure construction, buried cable quantity is also more and more, makes
At cable loop can not be accurately identified, difficulty is brought to the construction reformation engineering in later period.Early stage low-voltage cable there are the problem of
It is in particular in the following aspects:
(1) equipment near-end cable termination and distance terminal Sign Board are inconsistent；
(2) equipment near-end cable termination or distance terminal Sign Board missing；
(3) cable machinery path profile lacks.
Since rural basic level teams and groups are much all without the cable path detector for configuring profession, lacked for this Sign Board
Early stage low-voltage cable low-voltage cable general path can substantially generally be judged according to cable duct, cable tube, but more telegram in reply cables
When buried simultaneously, this cable is that corresponding other which a bar cable then can not often judge, thus can not be to cable at this
Load carries out load cutting transformation, so first to be identified (non-path detection) to this few telegram in reply cable.
Traditional cable recognition methods mainly utilizes cable path detector, can be used for the method master of cable trace detection
There are electromagnetic method, DC electrical method, seismic wave method, radioactivity tracing etc., wherein electromagnetic method has detection accuracy height, operation letter
Just, strong antijamming capability, it is high-efficient the features such as, most of cable path detector currently on the market is all based on the method and grinds
It makes.Cable path detector is mainly made of two transmitter, receiver parts, and principle is that transmitter generates electromagnetic wave
And underground is passed the signal to by different radiation patterns and is detected on cable, buried cable senses after electromagnetic wave in its table
Bright generation induced current, induced current give off electromagnetic wave to the ground in this communication process, exist at this time along cable distribution
The receiver of ground location will receive electromagnetic wave signal to verify trend and the position of cable.
Cable path detector is more professional using operation, needs personnel's operation judges of certain experiences, can be accurate
Identify cable run, but instrument is somewhat expensive, cost is very high, and simultaneously the equipment is not configured in teams and groups of many bases of Utilities Electric Co., it is desirable that essence
When just using the equipment when true path, and burying (a plurality of same path of cable) parallel for a plurality of cable, it can only
Guarantee that path is correct, specifically which bar cable can not be also identified, in addition cable path detector applies in general to high-tension cable, right
It is not necessarily applicable in low-voltage cable, the judgement of the various instruments of other similar cable detector, all there is that at high cost, operation is more complex
The drawbacks of, therefore we need the method that research cost is low, simple and convenient.
Cable recognition methods under traditional power-off condition is also shorted electric-resistivity method, a plurality of and bury low-voltage cable and do not put into operation
Or when can not individually stop power transmission, a plurality of cable is not charged or has a power failure simultaneously, general using electric-resistivity method detection is shorted, i.e., by a certain item
Cable shorted on one end measures alternate resistance value in other end respectively and judges the head end and end if measuring resistance value is zero
On same cable.The above method is suitable for the case where non-T of cable ends connects load, and (pure cable segments, first and last end are all empty
Set), when connecing load for cable and not unlocking, for example agriculture net platform region cable branch box T connects more load appliance, is equivalent to simultaneously
Join many resistance, be equivalent to short circuit, it is all very small to survey resistance, therefore is shorted electric-resistivity method in this case and is also difficult to sentence
It is disconnected, it is not suitable for.Therefore the method that we need research cost low, effective, simple and convenient.
Summary of the invention
The present invention provides a kind of power failure recognition methods of low-voltage cable route, and which overcome described in background technology existing
There is the deficiency of technology.
The technical solution adopted by the present invention to solve the technical problems is:
The power failure recognition methods of low-voltage cable route, the multi-cable with unknown path trend have a power failure in cable run
In the case where, apply voltage between the two-phase of a cable end piece, if between the head end and two-phase identical with end of cable
The application voltage is measured, then judges that the head end and end are located on same cable.
Among one embodiment: cable of the cable between two neighboring feeder pillar, the head end and end respectively correspond it
The end of incoming cables of the leading-out terminal of one feeder pillar and another feeder pillar.
Among one embodiment: the voltage is DC voltage.
The technical program compared with the background art, it has the following advantages:
Under power-off condition, voltage is applied between the two-phase of a cable end piece by simple, common equipment, if in electricity
The application voltage is measured between the head end of cable and two-phase identical with end, then judges that the head end and end are located at same cable
On, the recognition methods is simple, convenient, effective, required at low cost.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is certain area's low-voltage cable route distribution schematic diagram described in the present embodiment.
Specific embodiment
The power failure recognition methods of low-voltage cable route, the multi-cable with unknown path trend have a power failure in cable run
In the case where, apply between the two-phase of a cable end piece voltage (voltage is DC voltage, the DC voltage can for 9V or
The battery of 1.5V is formed), if measuring the application voltage between the head end and two-phase identical with end of cable, (i.e. cable is first
The voltage that section applies is equal with the voltage that end measures), then judge that the head end and end are located on same cable.
In specific application example, cable of the cable between two neighboring feeder pillar, the head end and end are respectively corresponded
The end of incoming cables of the leading-out terminal of one feeder pillar and another feeder pillar, the two neighboring feeder pillar are the upper level point along cable louding
Branch case and next stage feeder pillar.
For example, there are three times cable outlets in certain area, three telegram in reply cables are buried side by side together to pass through highway, because Sign Board lacks
Can not judge this cable it is corresponding be other which a bar cable.The load of this area is chronically at heavy condition, therefore
Need to increase newly platform area near this area to solve the problems, such as heavy duty.By site inspection, 2# feeder pillar cable run institute band is negative
Lotus, which need to be cut, is transferred to the area Xin Tai.Since the cable system building time is more long, three cable outlets in 1# feeder pillar
Sign Board has lacked, therefore can not judge the head end of 2# feeder pillar cable, as shown in Figure 1.
Since cable is all embedded with path and is low-voltage cable, cable path detector, and 1# feeder pillar three can not be used
Bar cable can not be controlled individually directly in bus bar and stop power transmission, therefore determine to adopt within the period for having a power failure newly-increased platform area construction
Cable loop is identified with additional power source method.
9V battery is accessed in the long cable section of ingoing line ab of 2# cable branch box alternate (yellow green), is surveyed respectively in 1# cable branch box
The ab voltage between phases of 3 cables is measured, measurement result is as follows:
1 L1 voltage between phases of table
| L1 | Uab | Uac | Ubc |
| Voltage | 8.9V | 0V | 0V |
2 L2 voltage between phases of table
| L2 | Uab | Uac | Ubc |
| Voltage | 0V | 0V | 0V |
3 L3 voltage between phases of table
| L3 | Uab | Uac | Ubc |
| Voltage | 0V | 0V | 0V |
It is possible thereby to judge that 1# feeder pillar cable outlet L1 is the inlet wire of 2# feeder pillar cable.If cable tail end does not have
There is color mark, the present embodiment the method can be taken, only need to measure two-by-two, measures head end and the end of electric mutually isobaric value
End is i.e. on same root cable.
The method of quick identification cable run described in this case, relatively traditional cable detector method is low in cost, operation
Convenient, develop simultaneously case verification, accurately and reliably, and has biggish economic benefit.
The method of quick identification cable run described in this case, principle is simple, technology maturation, applied widely, accuracy
It is high.Suitable for the occasion for needing to identify when rural area low-voltage cable Sign Board missing.
The above is only the preferred embodiment of the present invention, the range implemented of the present invention that therefore, it cannot be limited according to, i.e., according to
Equivalent changes and modifications made by the invention patent range and description, should still be within the scope of the present invention.
Claims (3)
1. the power failure recognition methods of low-voltage cable route, it is characterised in that: the multi-cable with unknown path trend, in cable
In the case where line outage, apply voltage between the two-phase of the end of a cable, if in the head end of cable and identical as end
Two-phase between measure the application voltage, then judge that the head end and end are located on same cable.
2. the power failure recognition methods of low-voltage cable route according to claim 1, it is characterised in that: the cable is adjacent two
Cable between a feeder pillar, the head end and end respectively correspond the leading-out terminal of one feeder pillar and the inlet wire of another feeder pillar
End.
3. the power failure recognition methods of low-voltage cable route according to claim 1, it is characterised in that: the voltage is direct current
Pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810715944.5A CN109085458A (en) | 2018-07-03 | 2018-07-03 | The power failure recognition methods of low-voltage cable route |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810715944.5A CN109085458A (en) | 2018-07-03 | 2018-07-03 | The power failure recognition methods of low-voltage cable route |
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| Publication Number | Publication Date |
|---|---|
| CN109085458A true CN109085458A (en) | 2018-12-25 |
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| CN201810715944.5A Pending CN109085458A (en) | 2018-07-03 | 2018-07-03 | The power failure recognition methods of low-voltage cable route |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2421658Y (en) * | 1999-05-22 | 2001-02-28 | 王建雷 | Cable correcting apparatus |
| CN1776440A (en) * | 2005-12-13 | 2006-05-24 | 北京潞电电气设备厂 | Wiring identifying device and method |
| CN101603995A (en) * | 2008-06-13 | 2009-12-16 | 北京诺斯卡科技有限公司 | Method and station user identification apparatus that cable detecting device and realization thereof detect |
| CN105448408A (en) * | 2015-11-25 | 2016-03-30 | 国网辽宁省电力有限公司锦州供电公司 | Cable recognition bar and method for recognizing maintenance cable through employing same |
| CN106448119A (en) * | 2016-12-06 | 2017-02-22 | 国网浙江临海市供电公司 | Electric energy meter desk area recognition system |
-
2018
- 2018-07-03 CN CN201810715944.5A patent/CN109085458A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2421658Y (en) * | 1999-05-22 | 2001-02-28 | 王建雷 | Cable correcting apparatus |
| CN1776440A (en) * | 2005-12-13 | 2006-05-24 | 北京潞电电气设备厂 | Wiring identifying device and method |
| CN101603995A (en) * | 2008-06-13 | 2009-12-16 | 北京诺斯卡科技有限公司 | Method and station user identification apparatus that cable detecting device and realization thereof detect |
| CN105448408A (en) * | 2015-11-25 | 2016-03-30 | 国网辽宁省电力有限公司锦州供电公司 | Cable recognition bar and method for recognizing maintenance cable through employing same |
| CN106448119A (en) * | 2016-12-06 | 2017-02-22 | 国网浙江临海市供电公司 | Electric energy meter desk area recognition system |
Non-Patent Citations (1)
| Title |
|---|
| 马学华 等: "电缆线路的相位检查试验方法及注意事项", 《科技资讯》 * |
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Application publication date: 20181225 |