CN106370976A - Railway power supply cable outer jacket fault's precise position detection method - Google Patents
Railway power supply cable outer jacket fault's precise position detection method Download PDFInfo
- Publication number
- CN106370976A CN106370976A CN201610697761.6A CN201610697761A CN106370976A CN 106370976 A CN106370976 A CN 106370976A CN 201610697761 A CN201610697761 A CN 201610697761A CN 106370976 A CN106370976 A CN 106370976A
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- CN
- China
- Prior art keywords
- fault
- cable
- potential difference
- power supply
- trouble point
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
Abstract
The invention provides a railway power supply cable outer jacket fault's precise position detection method, which relates to the technical field of railway power supply cable fault detection. The method comprises the following steps: with awareness of the cable's arranging direction, using a potential difference probe to detect along the direction of the cable with the results that close to the position with fault, the potential difference increases rapidly and to its maximum before the position with fault, that the potential difference is zero right above the position with fault, and that after the position with fault, the pointer deviates in the left and reaches the maximum again; and according to the characteristics of the potential difference, positioning the position with fault; using the annular divergence characteristics of the discharge current above the position with fault to locate fault when the cable is not easy to detect due to the ground limitation along the length direction of the cable; searching two equipotential points in different directions; and finding the intersection point of the vertical bisection line of the two equipotential points, the intersection point being the position with fault. The railway power supply cable outer jacket fault's precise position detection method of the invention can be applied under a simple principle. Simple to operate, the method achieves good anti-interference performance. The method can position directly and accurately without causing much destruction.
Description
Technical field
The present invention relates to railway power supply Cable fault examination method and technology field is and in particular to railway power supply protective coverings of cable
Fault pinpoint detection method.
Background technology
According to Chinese Railway technical regulation, high ferro contact net cable is the rated voltage of AC single phase 27.5kv, distribution
High tension cable is AC three-phase 8.7/10kv rated voltage.According to high ferro power supply region technical standard, above voltage is suitable
Powered using single-core cable, to meet high ferro pull strength and the big requirement of motor current-carrying capacity.
High ferro service cable belongs to one kind of power cable, mainly carries electric energy transmission ＆ distribution task.High ferro service cable
Insulating layer material is mainly crosslinked polyethylene xlpe, and it is the downstream product of oil, and insulating barrier is the core layer of high ferro cable,
Play a part to completely cut off the cable conductor core of highfield with cable grounding system.
Advancing by leaps and bounds of operating experience with crosslinked cable and detection technique, has driven crosslinked cable to set towards water blocking layer
The direction of meter is developed.This longitudinal water-blocking layer design with special material, after cable jacket runs into damage, can be fast
Speed expands, and hinders moisture endosmosis, thus improving the power supply reliability of high ferro cable, from occupying cable greater depth
Body part reduces high ferro electric cable stoppage and catastrophic discontinuityfailure.
It is the ingredient introduced in Europe and Japanese high ferro technology that 27.5kv with 10kv exchanges high ferro service cable.Disappearing
When changing this technology, the combination of our design and constructions in part high ferro is walked certain detour.Wherein partly former
Because being the human resource training system that China lacks systematized senior skilled worker and technician；Also have construction organization and construction quality pipe
The relatively low problem of reason level, is not reaching to the technical requirements of single high ferro service cable operation, also fails to catch up with Europe and Japan
High ferro cable machinery during high ferro design should have level.
Content of the invention
Present invention aims to the defect of prior art and deficiency, provide a kind of principle simple, easy to operate, anti-dry
Disturb, destructive less, fixed point intuitively accurately it is adaptable to be laid in the cable in dirt floor railway power supply protective coverings of cable therefore
Barrier pinpoint detection method.
For achieving the above object, the technical solution used in the present invention is: railway power supply protective coverings of cable fault pinpoint
Detection method, it comprises the steps of:
1st, when knowing cable louding, with potential difference meter probe along cable orientation detection, when near trouble point, potential difference is rapid
Increase, reach maximum before trouble point；Directly over trouble point, potential difference is zero；After crossing trouble point, pointer is reverse-biased and reaches again
Maximum, can position to trouble point according to these features of potential difference；
2nd, when the surface state by cable length direction limited be difficult measurement when, available discharge current is in trouble point upper annular
The feature dissipating, to position, is found two isopotential points respectively in different directions, is then found out vertically putting down of two groups of isopotential points
The intersection point of separated time, as trouble point.
During present invention operation: apply a high-voltage pulse current between cable metal set and ground, with potential difference meter along cable
Path detection.
After said method, what the present invention produced has the beneficial effect that railway power supply protective coverings of cable of the present invention
Fault pinpoint detection method, principle simple, easy to operate, anti-interference good, destructive less, fixed point is intuitively accurately it is adaptable to apply
Cable in dirt floor.
Specific embodiment
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to above-mentioned technical side
Case is described in detail.
This specific embodiment adopts the following technical scheme that railway power supply protective coverings of cable fault pinpoint detection side
Method, it comprises the steps of:
1st, when knowing cable louding, with potential difference meter probe along cable orientation detection, when near trouble point, potential difference is rapid
Increase, reach maximum before trouble point；Directly over trouble point, potential difference is zero；After crossing trouble point, pointer is reverse-biased and reaches again
Maximum, can position to trouble point according to these features of potential difference；
2nd, when the surface state by cable length direction limited be difficult measurement when, available discharge current is in trouble point upper annular
The feature dissipating, to position, is found two isopotential points respectively in different directions, is then found out vertically putting down of two groups of isopotential points
The intersection point of separated time, as trouble point.
During the operation of this specific embodiment: apply a high-voltage pulse current between cable metal set and ground, use potential difference
Meter detects along cable trace.
After said method, what this specific embodiment produced has the beneficial effect that railway power supply electricity of the present invention
Cable outer jacket fault pinpoint detection method, principle simple, easy to operate, anti-interference good, destructive less, fixed point intuitively accurate,
It is applied to the cable being laid in dirt floor.
Ultimate principle and principal character and the advantages of the present invention of the present invention have been shown and described above.The skill of the industry
The simply explanation it should be appreciated that the present invention is not restricted to the described embodiments, described in above-described embodiment and description for the art personnel
The principle of the present invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these
Changes and improvements both fall within scope of the claimed invention.Claimed scope by appending claims and
Its equivalent thereof.
Claims (1)
1. railway power supply protective coverings of cable fault pinpoint detection method is it is characterised in that it comprises the steps of:
(1), when knowing cable louding, with potential difference meter probe along cable orientation detection, when near trouble point, potential difference is fast
Speed increases, and reaches maximum before trouble point；Directly over trouble point, potential difference is zero；After crossing trouble point, pointer is reverse-biased and again
Reach maximum, trouble point can be positioned according to these features of potential difference；
(2), when the surface state by cable length direction limited be difficult measurement when, available discharge current ring above trouble point
The feature that shape dissipates, to position, is found two isopotential points respectively in different directions, is then found out vertically putting down of 2 groups of isopotential points
The intersection point of separated time, as trouble point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610697761.6A CN106370976A (en) | 2016-08-22 | 2016-08-22 | Railway power supply cable outer jacket fault's precise position detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610697761.6A CN106370976A (en) | 2016-08-22 | 2016-08-22 | Railway power supply cable outer jacket fault's precise position detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106370976A true CN106370976A (en) | 2017-02-01 |
Family
ID=57879248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610697761.6A Pending CN106370976A (en) | 2016-08-22 | 2016-08-22 | Railway power supply cable outer jacket fault's precise position detection method |
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| Country | Link |
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| CN (1) | CN106370976A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445342A (en) * | 2018-03-01 | 2018-08-24 | 华南理工大学 | A kind of cable cover(ing) single-point metallicity fault ground induced current calculating method |
| CN109490688A (en) * | 2018-11-12 | 2019-03-19 | 国网河南省电力公司修武县供电公司 | A kind of auxiliary device of direct current system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020024342A1 (en) * | 1998-09-28 | 2002-02-28 | Jean Bussinger | Method and device for locating an insulation fault in an electric cable |
| CN1598607A (en) * | 2004-08-20 | 2005-03-23 | 淄博博鸿电气有限公司 | Directional and positioning testing device for fault of direct application type cable sheath |
| CN101446616A (en) * | 2008-02-29 | 2009-06-03 | 田振国 | Method for finding fault point of cable or pipeline and device thereof |
| CN102298104A (en) * | 2010-06-25 | 2011-12-28 | 上海宝钢工业检测公司 | Method for detecting ground fault of bridge cable |
| CN102540008A (en) * | 2010-12-17 | 2012-07-04 | 中冶宝钢技术服务有限公司 | Cable fault detection instrument |
| CN102759686A (en) * | 2012-07-26 | 2012-10-31 | 山东科汇电力自动化有限公司 | Method for locating power cable faults |
| CN102928735A (en) * | 2012-10-17 | 2013-02-13 | 李国伟 | Cable failure location method |
-
2016
- 2016-08-22 CN CN201610697761.6A patent/CN106370976A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020024342A1 (en) * | 1998-09-28 | 2002-02-28 | Jean Bussinger | Method and device for locating an insulation fault in an electric cable |
| CN1598607A (en) * | 2004-08-20 | 2005-03-23 | 淄博博鸿电气有限公司 | Directional and positioning testing device for fault of direct application type cable sheath |
| CN101446616A (en) * | 2008-02-29 | 2009-06-03 | 田振国 | Method for finding fault point of cable or pipeline and device thereof |
| CN102298104A (en) * | 2010-06-25 | 2011-12-28 | 上海宝钢工业检测公司 | Method for detecting ground fault of bridge cable |
| CN102540008A (en) * | 2010-12-17 | 2012-07-04 | 中冶宝钢技术服务有限公司 | Cable fault detection instrument |
| CN102759686A (en) * | 2012-07-26 | 2012-10-31 | 山东科汇电力自动化有限公司 | Method for locating power cable faults |
| CN102928735A (en) * | 2012-10-17 | 2013-02-13 | 李国伟 | Cable failure location method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445342A (en) * | 2018-03-01 | 2018-08-24 | 华南理工大学 | A kind of cable cover(ing) single-point metallicity fault ground induced current calculating method |
| CN109490688A (en) * | 2018-11-12 | 2019-03-19 | 国网河南省电力公司修武县供电公司 | A kind of auxiliary device of direct current system |
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| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170201 |
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| RJ01 | Rejection of invention patent application after publication |