CN110118916A - A kind of high voltage power cable circulating current fault detection method - Google Patents
A kind of high voltage power cable circulating current fault detection method Download PDFInfo
- Publication number
- CN110118916A CN110118916A CN201910553827.8A CN201910553827A CN110118916A CN 110118916 A CN110118916 A CN 110118916A CN 201910553827 A CN201910553827 A CN 201910553827A CN 110118916 A CN110118916 A CN 110118916A
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- Prior art keywords
- fault
- cable
- high voltage
- detection
- voltage power
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/11—Locating faults in cables, transmission lines, or networks using pulse reflection methods
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Locating Faults (AREA)
Abstract
The invention discloses a kind of high voltage power cable circulating current fault detection methods, comprising the following steps: S1: determining the type and severity of failure；S2: cable fault localization and fix-point method appropriate are selected；S3: fault distance is determined using instrument in one end of cable；S4: according to fault localization as a result, moving towards according to the path of cable, the substantially orientation of fault point is found out；S5: in the range of a very little, the accurate location of fault point is determined using electric discharge sound detection or other methods.The present invention, which realizes, quickly to carry out pinpoint function to cable fault, not only reduce detection time, and, substantially increase the accuracy of detection cable failure, it avoids because needing to carry out complete detection to very long cable, the case where causing testing result bad and wasting time, improve the efficiency of Cable fault examination.
Description
Technical field
The present invention relates to field of cable technology more particularly to a kind of high voltage power cable circulating current fault detection methods.
Background technique
Power cable is to transmit electric (magnetic) energy, information and the wire product for realizing electromagnetic energy conversion.The electric wire electricity of broad sense
Cable is also referred to simply as cable, and the cable of narrow sense refers to insulated cable, it may be defined as: the aggregate consisted of following parts；One
Or the clad that a plurality of insulated core and each may have, total protective layer and outer jacket, cable can also have additional
The conductor not insulated, the wire and cable product overwhelming majority, which is that section (cross section) shape is identical, (to be ignored and produces because of manufacture
Raw error), product in long strip, this is because being as the spy for constituting route or coil and using in system or equipment
What sign was determined, with economic rapid development, power cable is widely used in various industries, field.
Currently, since power cable under the influence of external factor after long-time use or due to being easy to damage
It is bad, it needs to carry out fault detection to power cable, still, it is straight that existing fault detection method is generally adopted by electric discharge sound detection
Fixed point is connect, this fault distance-finding method there may come a time when to be detected along very long cable road strength, moreover, because cable mistake
It is long, detection failure point discharging sound be it is highly difficult, not only waste time, moreover, testing result is undesirable, for this purpose, it is proposed that
A kind of high voltage power cable circulating current fault detection method solves the above problems.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of high voltage power cable shield proposed
Layer current failure detection method.
To achieve the goals above, present invention employs following technical solutions:
A kind of high voltage power cable circulating current fault detection method, comprising the following steps:
S1: the type and severity of failure are determined；
S2: cable fault localization and fix-point method appropriate are selected；
S3: fault distance is determined using instrument in one end of cable；
S4: according to fault localization as a result, moving towards according to the path of cable, the substantially orientation of fault point is found out；
S5: in the range of a very little, the accurate location of fault point is determined using electric discharge sound detection or other methods.
Preferably, in the S2, the property of cable fault includes: fault resstance；Flashover, closure failure；It is grounded, is short
Road, broken string；Mixing；Single-phase, two-phase, three-phase fault.
Preferably, in the S2, the key of detection of cable fault is pinpoint.
Preferably, in the S4, the method for ranging includes classic bridge method and modern traveling wave method.
Preferably, the classic bridge method includes HV bridge method and low pressure bridge method, and the modern times traveling wave method includes arteries and veins
Rush method, Low Voltage Impulse Method and high voltage pulse method.
In the present invention, when in use, can according to failure there is a phenomenon where when occur, tentatively judge the property of failure, example
Such as, when cable in operation breaks down, if only having given ground signalling, it is likely that when single-phase earthing failure, relay
Overcurrent relay work is protected, trip phenomenon occurs, then may have occurred cable two-phase or three-phase shortcircuit or ground connection event at this time
Barrier, or short circuit and ground connection mixed fault has occurred, then select cable fault localization appropriate and fix-point method to come to electricity
Cable is detected, and when detection, cable fault flash tester is used first, in the effect of high direct voltage or high voltage pulse signal
Lower breakdown fault point, then by observation pulse round-trip side between test point and fault point time ranging, then according to
Failure detection result moves towards according to the road strength of cable, finds out the substantially orientation of fault point, then selects the range of a very little,
The accurate location of fault point is determined using electric discharge sound detection or other methods, the present invention realizes can be quickly to cable fault
Pinpoint function is carried out, detection time is not only reduced, moreover, substantially increasing the accuracy of detection cable failure, is kept away
Exempt to improve because needing the case where carrying out complete detection to very long cable, causing testing result bad and waste time
The efficiency of Cable fault examination.
Specific embodiment
Further explain is made to the present invention combined with specific embodiments below.
A kind of high voltage power cable circulating current fault detection method, comprising the following steps:
S1: the type and severity of failure are determined；
S2: selecting cable fault localization and fix-point method appropriate, and in S2, the property of cable fault includes: fault resstance；
Flashover, closure failure；Ground connection, short circuit, broken string；Mixing；Single-phase, two-phase, three-phase fault, appearance when can be occurred according to failure
The phenomenon that, tentatively judge the property of failure, for example, when cable in operation breaks down, if only having given ground signalling,
It is possible that when single-phase earthing failure, relay protection overcurrent relay work, there is trip phenomenon, then may have occurred electricity at this time
Cable two-phase or three-phase shortcircuit or ground fault, or short circuit and ground connection mixed fault has occurred, it is short when these failures occur
Road or power conserving current, which blow cable, will form disconnection fault, but cannot completely be decided the property of failure by above-mentioned judgement,
Measurement insulation resistance must also be learned and carry out " conduction test ", in S2, the key of detection of cable fault is pinpoint；
S3: fault distance is determined using instrument in one end of cable；
S4: according to fault localization as a result, moving towards according to the path of cable, finding out the substantially orientation of fault point, in S4, ranging
Method include classic bridge method and modern traveling wave method, classic bridge method includes HV bridge method and low pressure bridge method, modern row
Wave method includes impulse method, Low Voltage Impulse Method and high voltage pulse method, and classic bridge method has simple, convenient and high accuracy excellent
Point, the disadvantage is that be not suitable for high resistant and flashover type failure, the advantages of low voltage pulse reflection method are as follows: simple, intuitive and do not need to know
The primitive technologies data such as exact length of road cable can also readily recognize cable connector and branch according to pulse-echo waveform
The position of point；
S5: in the range of a very little, the accurate location of fault point, sound are determined using electric discharge sound detection or other methods
Magnetic-synchro detection method improves the ability of anti-vibration noise jamming, by detecting the time difference of the signal received, can estimate
The position of fault point distance probe.
In the present invention, when in use, can according to failure there is a phenomenon where when occur, tentatively judge the property of failure, example
Such as, when cable in operation breaks down, if only having given ground signalling, it is likely that when single-phase earthing failure, relay
Overcurrent relay work is protected, trip phenomenon occurs, then may have occurred cable two-phase or three-phase shortcircuit or ground connection event at this time
Barrier, or short circuit and ground connection mixed fault has occurred, then select cable fault localization appropriate and fix-point method to come to electricity
Cable is detected, and when detection, cable fault flash tester is used first, in the effect of high direct voltage or high voltage pulse signal
Lower breakdown fault point, then by observation pulse round-trip side between test point and fault point time ranging, then according to
Failure detection result moves towards according to the road strength of cable, finds out the substantially orientation of fault point, then selects the range of a very little,
The accurate location of fault point is determined using electric discharge sound detection or other methods.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (5)
1. a kind of high voltage power cable circulating current fault detection method, which comprises the following steps:
S1: the type and severity of failure are determined；
S2: cable fault localization and fix-point method appropriate are selected；
S3: fault distance is determined using instrument in one end of cable；
S4: according to fault localization as a result, moving towards according to the path of cable, the substantially orientation of fault point is found out；
S5: in the range of a very little, the accurate location of fault point is determined using electric discharge sound detection or other methods.
2. a kind of high voltage power cable circulating current fault detection method according to claim 1, which is characterized in that described
In S2, the property of cable fault includes: fault resstance；Flashover, closure failure；Ground connection, short circuit, broken string；Mixing；It is single-phase, two
Phase, three-phase fault.
3. a kind of high voltage power cable circulating current fault detection method according to claim 1, which is characterized in that described
In S2, the key of detection of cable fault is pinpoint.
4. a kind of high voltage power cable circulating current fault detection method according to claim 1, which is characterized in that described
In S4, the method for ranging includes classic bridge method and modern traveling wave method.
5. a kind of high voltage power cable circulating current fault detection method according to claim 4, which is characterized in that described
Classic bridge method includes HV bridge method and low pressure bridge method, and the modern times traveling wave method includes impulse method, Low Voltage Impulse Method and height
Press impulse method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910553827.8A CN110118916A (en) | 2019-06-25 | 2019-06-25 | A kind of high voltage power cable circulating current fault detection method |
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| CN201910553827.8A CN110118916A (en) | 2019-06-25 | 2019-06-25 | A kind of high voltage power cable circulating current fault detection method |
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| CN110118916A true CN110118916A (en) | 2019-08-13 |
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| CN201910553827.8A Pending CN110118916A (en) | 2019-06-25 | 2019-06-25 | A kind of high voltage power cable circulating current fault detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111856208A (en) * | 2020-07-17 | 2020-10-30 | 山东科汇电力自动化股份有限公司 | Ultrahigh-voltage cable sheath fault point positioning device and method |
| CN113790998A (en) * | 2021-09-07 | 2021-12-14 | 山东省环境保护科学研究设计院有限公司 | Method for rapidly determining environment-friendly dredging depth of river polluted bottom mud |
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| CN102207533A (en) * | 2011-04-12 | 2011-10-05 | 陕西化建工程有限责任公司 | Method for searching fault of power cable |
| CN103926510A (en) * | 2014-05-12 | 2014-07-16 | 国家电网公司 | Current and carrying capacity online monitoring and fault diagnosing and locating method for cable protection layer |
| CN108020751A (en) * | 2017-11-06 | 2018-05-11 | 四川大学 | A kind of Cable fault examination method and Cable fault examination system |
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2019
- 2019-06-25 CN CN201910553827.8A patent/CN110118916A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5461318A (en) * | 1994-06-08 | 1995-10-24 | Borchert; Marshall B. | Apparatus and method for improving a time domain reflectometer |
| CN102207533A (en) * | 2011-04-12 | 2011-10-05 | 陕西化建工程有限责任公司 | Method for searching fault of power cable |
| CN103926510A (en) * | 2014-05-12 | 2014-07-16 | 国家电网公司 | Current and carrying capacity online monitoring and fault diagnosing and locating method for cable protection layer |
| CN108020751A (en) * | 2017-11-06 | 2018-05-11 | 四川大学 | A kind of Cable fault examination method and Cable fault examination system |
Non-Patent Citations (1)
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| 何淮淼: "电力电缆故障检测及精确定位方法的研究", 《中国集体经济》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111856208A (en) * | 2020-07-17 | 2020-10-30 | 山东科汇电力自动化股份有限公司 | Ultrahigh-voltage cable sheath fault point positioning device and method |
| CN111856208B (en) * | 2020-07-17 | 2023-09-19 | 山东科汇电力自动化股份有限公司 | Device and method for positioning fault point of ultra-high voltage cable sheath |
| CN113790998A (en) * | 2021-09-07 | 2021-12-14 | 山东省环境保护科学研究设计院有限公司 | Method for rapidly determining environment-friendly dredging depth of river polluted bottom mud |
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Application publication date: 20190813 |