CN108469577A - A kind of device by leakage current measurement cable aging - Google Patents
A kind of device by leakage current measurement cable aging Download PDFInfo
- Publication number
- CN108469577A CN108469577A CN201810510617.6A CN201810510617A CN108469577A CN 108469577 A CN108469577 A CN 108469577A CN 201810510617 A CN201810510617 A CN 201810510617A CN 108469577 A CN108469577 A CN 108469577A
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- China
- Prior art keywords
- leakage current
- cable
- sensor
- aging
- sampling
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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
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
-
- 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
- G01R31/003—Environmental or reliability tests
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Testing Relating To Insulation (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention discloses a kind of device by leakage current measurement cable aging, includes sensor, the grounding connection line of the sampling of device body, leakage current, and described device ontology is fixed on the cable surface close to cable grounding armoring tape；One end of the grounding connection line and the ground connection armouring band connection of earth cable, another end connection device ontology；The sensor of the leakage current sampling is fixed on the end of the inner insulating layer of cable, and is electrically connected with device body.The present invention realizes purposeful, planned progress cable aging replacement operation by the on-line monitoring of cable aging, shortens power off time.
Description
Technical field
The present invention relates to cable detection technical field, more particularly to a kind of dresses by leakage current measurement cable aging
It sets.
Background technology
Compared with cable body, cable termination is weak link, accounts for about the 95% of cable line fault rate.Due to end
There are multiple middle conductor connecting links, tie point contact resistance is excessive for making, wiring construction technology, and temperature, which rises, to be accelerated, and fever is greatly
Promote the oxidation film of connector to thicken in heat dissipation, connect loosening or snap, and then contact resistance bigger, Wen Sheng is faster.It is so pernicious
Cycle causes the insulation damage layer of connector, forms phase fault, over the ground disruptive discharge or catches fire, and the final end that causes catches fire
It burns or explosion accident etc..Existing way often stops transport running cable according to plan, is added five, six and accompanies voltage test, this
The Insulation Test of cable, cable, which must stop transport in the period, could carry out Insulation Test；Insulation Test is done with five, six times of voltages also not to the utmost
Rationally, such situation frequent occurrence：Some old cables puncture once experiment, do not do experiment when can run very long instead certainly
Between；Every cable is all carried out carefully analyzing to cause labor intensive big.
Invention content
The main object of the present invention is to propose a kind of device by leakage current measurement cable aging, it is intended to be overcome above
Problem.
To achieve the above object, the present invention proposes a kind of device by leakage current measurement cable aging, including device
Sensor, the grounding connection line that ontology, leakage current sample, described device ontology are fixed on the electricity close to cable grounding armoring tape
Cable surface；One end of the grounding connection line and the ground connection armouring band connection of earth cable, another end connection device ontology；Institute
The end that the sensor that leakage current samples is fixed on the inner insulating layer of cable is stated, and is electrically connected with device body.
Preferably, the sensor of the leakage current sampling is the inner insulating layer that annular open-close type sensor card is connected to cable
End.
Preferably, the grounding connection line is fine copper conducting wire.
Preferably, described device ontology includes power supply module, micro-current magnification circuit, ADC sampling modules and signal processing
Module, the power supply module are connect with the sensor that leakage current samples, and the sensor of leakage current sampling is also put with micro-current
The input terminal connection of big circuit, the output end of micro-current magnification circuit are connect with the input terminal of ADC sampling modules, and ADC samples mould
The output end of block is connect with signal processing module.
Preferably, the sensor of the leakage current sampling is used for the leakage current of detection cable.
Preferably, the micro-current magnification circuit is used to amplify the leakage current two level of detected cable, conversion
At the voltage signal Vout in measurable range.
Preferably, the ADC sampling modules are used to pass through modulus ADC sample conversions to the voltage signal Vout converted.
Preferably, the signal processing module is used to carry out analyzing processing according to the signal sampled, obtains its aging number
According to.
Preferably, the number of the sensor of the leakage current sampling is one or several.
The present invention is installed on cable, and Insulation Test is carried out without periodical stoppage in transit cable；And pass through several sensors
It is arranged while acquires the leakage current situation of several cables, reduce labor intensive, avoids by caused by Insulation Test
Cable bad effectively slows down the aging speed of insulation；By the on-line monitoring of cable aging, realize purposeful, planned
Cable aging replacement operation is carried out, power off time is shortened, improves power supply reliability and economic benefit.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is structural schematic diagram of the present invention by one embodiment of device of leakage current measurement cable aging；
Fig. 2 is the circuit structure diagram of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained without creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
If it is to be appreciated that related in the embodiment of the present invention directionality instruction (such as up, down, left, right, before and after ...),
Then directionality instruction be only used for explaining relative position relation under a certain particular pose (as shown in the picture) between each component,
Motion conditions etc., if the particular pose changes, directionality instruction also correspondingly changes correspondingly.
If in addition, relating to the description of " first ", " second " etc. in the embodiment of the present invention, it is somebody's turn to do " first ", " second " etc.
Description be used for description purposes only, be not understood to indicate or imply its relative importance or implicitly indicate indicated skill
The quantity of art feature." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one spy
Sign.In addition, the technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, when the knot that conflicting or cannot achieve when will be understood that this technical solution occurs in the combination of technical solution
Conjunction is not present, also not the present invention claims protection domain within.
As shown in Figure 1, the present invention proposes a kind of device by leakage current measurement cable aging, including device body,
Sensor, the grounding connection line of leakage current sampling, described device ontology are fixed on the cable meter close to cable grounding armoring tape
Face；One end of the grounding connection line and the ground connection armouring band connection of earth cable, another end connection device ontology；It is described to let out
The sensor of leakage current sampling is fixed on the end of the inner insulating layer of cable, and is electrically connected with device body.
Preferably, the sensor of the leakage current sampling is the inner insulating layer that annular open-close type sensor card is connected to cable
End.
Preferably, the grounding connection line is fine copper conducting wire.
Preferably, described device ontology includes power supply module, micro-current magnification circuit, ADC sampling modules and signal processing
Module, the power supply module are connect with the sensor that leakage current samples, and the sensor of leakage current sampling is also put with micro-current
The input terminal connection of big circuit, the output end of micro-current magnification circuit are connect with the input terminal of ADC sampling modules, and ADC samples mould
The output end of block is connect with signal processing module.
Preferably, the sensor of the leakage current sampling is used for the leakage current of detection cable.
Preferably, the micro-current magnification circuit is used to amplify the leakage current two level of detected cable, conversion
At the voltage signal Vout in measurable range.
Preferably, the ADC sampling modules are used to pass through modulus ADC sample conversions to the voltage signal Vout converted.
Preferably, the signal processing module is used to carry out analyzing processing according to the signal sampled, obtains its aging number
According to.
Preferably, the number of the sensor of the leakage current sampling is one or several.
In embodiments of the present invention, measuring principle of the invention：Cable leakage current shows width with insulation ag(e)ing
It is worth variation characteristic in the early stage cable leakage current very little of insulation degradation, increasess slowly, and it is apparent in deterioration later stage amplification.For
When cable installation initial stage insulation is good, leakage current curves are a straight line, such as the OA sections in measuring principle figure.Ions mobile adds
Play, leakage current is by sharp increase trend at this time, such as AB sections.When cable is aged to certain procedures, that is, after arriving B points, continue growing,
More losses are generated, causes the damage layer that insulate, punctures.
Sensor of the present invention by leakage current sampling detects leakage current, is put by micro-current magnification circuit two level
Greatly, the voltage signal Vout being converted in measurable range, after modulus ADC sample conversions, signal processing module is to being adopted
The signal of collection carries out analyzing processing, obtains the aging data of institute's detection cable.
The present invention reduces the stoppage in transit Insulation Tests of cable period；It solves labor intensive problems of too, avoids by exhausted
Cable bad caused by edge experiment, effectively slows down the aging speed of insulation；By the on-line monitoring of cable aging, realization has
Purpose, planned progress cable aging replacement operation shorten power off time, improve power supply reliability and economic benefit.
The foregoing is merely the preferred embodiment of the present invention, are not intended to limit the scope of the invention, every at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
In the scope of patent protection that other related technical areas are included in the present invention.
Claims (9)
1. a kind of device by leakage current measurement cable aging, which is characterized in that sampled including device body, leakage current
Sensor, grounding connection line, described device ontology is fixed on the cable surface close to cable grounding armoring tape；The ground connection connects
One end of wiring and the ground connection armouring band connection of earth cable, another end connection device ontology；The leakage current sampling
Sensor is fixed on the end of the inner insulating layer of cable, and is electrically connected with device body.
2. passing through the device of leakage current measurement cable aging as described in claim 1, which is characterized in that the leakage current
The sensor of sampling is the end for the inner insulating layer that annular open-close type sensor card is connected to cable.
3. passing through the device of leakage current measurement cable aging as described in claim 1, which is characterized in that the grounding connection
Line is fine copper conducting wire.
4. passing through the device of leakage current measurement cable aging as described in claim 1, which is characterized in that described device ontology
Including power supply module, micro-current magnification circuit, ADC sampling modules and signal processing module, the power supply module and leakage current
The sensor of sampling connects, and the sensor of leakage current sampling is also connect with the input terminal of micro-current magnification circuit, and micro-current is put
The output end of big circuit is connect with the input terminal of ADC sampling modules, and output end and the signal processing module of ADC sampling modules connect
It connects.
5. passing through the device of leakage current measurement cable aging as described in claim 1, which is characterized in that the leakage current
The sensor of sampling is used for the leakage current of detection cable.
6. passing through the device of leakage current measurement cable aging as claimed in claim 4, which is characterized in that the micro-current is put
Big circuit is used to amplify the leakage current two level of detected cable, the voltage signal being converted in measurable range
Vout。
7. passing through the device of leakage current measurement cable aging as claimed in claim 4, which is characterized in that the ADC samplings
Module is used to pass through modulus ADC sample conversions to the voltage signal Vout converted.
8. passing through the device of leakage current measurement cable aging as claimed in claim 4, which is characterized in that the signal processing
Module is used to carry out analyzing processing according to the signal sampled, obtains its aging data.
9. passing through the device of leakage current measurement cable aging as described in claim 1, which is characterized in that the leakage current
The number of the sensor of sampling is one or several.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810510617.6A CN108469577A (en) | 2018-05-24 | 2018-05-24 | A kind of device by leakage current measurement cable aging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810510617.6A CN108469577A (en) | 2018-05-24 | 2018-05-24 | A kind of device by leakage current measurement cable aging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108469577A true CN108469577A (en) | 2018-08-31 |
Family
ID=63261623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810510617.6A Pending CN108469577A (en) | 2018-05-24 | 2018-05-24 | A kind of device by leakage current measurement cable aging |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828394A (en) * | 2018-09-29 | 2018-11-16 | 绵阳市维博电子有限责任公司 | A kind of railway feed cable leakage current on-line measuring device and method |
| CN110687408A (en) * | 2019-10-15 | 2020-01-14 | 清华大学 | Cable insulation monitoring method and device |
| CN111025097A (en) * | 2019-11-19 | 2020-04-17 | 云南电网有限责任公司临沧供电局 | Intelligent method for evaluating leakage current difference factor of XLPE cable after aging |
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| JP2010071685A (en) * | 2008-09-16 | 2010-04-02 | Chubu Electric Power Co Inc | Method of measuring leakage current for high-voltage cable |
| CN101975914A (en) * | 2010-10-19 | 2011-02-16 | 华中科技大学 | On-line monitoring method and device for insulating state of power cable |
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| CN107607837A (en) * | 2017-08-18 | 2018-01-19 | 四川大学 | A kind of cable insulation degree of aging method of testing and device based on surge voltage |
| CN208172152U (en) * | 2018-05-24 | 2018-11-30 | 广东电网有限责任公司 | A kind of device by leakage current measurement cable aging |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828394A (en) * | 2018-09-29 | 2018-11-16 | 绵阳市维博电子有限责任公司 | A kind of railway feed cable leakage current on-line measuring device and method |
| CN110687408A (en) * | 2019-10-15 | 2020-01-14 | 清华大学 | Cable insulation monitoring method and device |
| CN110687408B (en) * | 2019-10-15 | 2021-05-28 | 清华大学 | Cable insulation monitoring method and device |
| CN111025097A (en) * | 2019-11-19 | 2020-04-17 | 云南电网有限责任公司临沧供电局 | Intelligent method for evaluating leakage current difference factor of XLPE cable after aging |
| CN111025097B (en) * | 2019-11-19 | 2022-04-15 | 云南电网有限责任公司临沧供电局 | Intelligent method for evaluating leakage current difference factor of XLPE cable after aging |
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