CN103529348A - Fault monitoring method for high-voltage cable - Google Patents
Fault monitoring method for high-voltage cable Download PDFInfo
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- CN103529348A CN103529348A CN201310481036.1A CN201310481036A CN103529348A CN 103529348 A CN103529348 A CN 103529348A CN 201310481036 A CN201310481036 A CN 201310481036A CN 103529348 A CN103529348 A CN 103529348A
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- cable
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- electric current
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- 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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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Locating Faults (AREA)
Abstract
The invention discloses a fault monitoring method for a high-voltage cable. In the method, a high-voltage cable fault monitoring device is adopted for monitoring current and temperature information of each phase at the two ends of a high-voltage power cable, the measured data are transmitted into a background monitor, and a background makes an abnormal running alarm. The device consists of a cable (7) head end current measuring device, a head end temperature sensor device, a remote terminal (1), a tail end current measuring device, a tail end temperature sensor device (2), a power supply and a background system (6), wherein the head end current measuring device, the head end temperature sensor and the remote terminal are arranged at the head end of the cable; the tail end current measuring device and the tail end temperature sensor are arranged at the tail end of the cable; data measured by the current measuring devices and the temperature sensor devices are transmitted to the background monitor in a GPRS (General Packet Radio Service) communication way (4) through the remote terminal. The device is simple in structure, and the fault of the cable can be judged by only monitoring the current changes and temperature changes at the head end and the tail end of the cable. The fault monitoring method is suitable for fault monitoring of the high-voltage cable.
Description
?
technical field
The present invention relates to a kind of high-tension cable fault monitoring method, belong to cable fault monitoring technical field.
background technology
Along with the development of Process of Urbanization Construction, urban electric power cable application is more and more extensive at present.Cable installation and operation major part is in underground and conduit line, operating condition is not understood substantially, when appearring in cable, overload and hot operation cannot understand, therefore can cause cable fault, outside destroy cable (navvy, artificial ditching) repair personnel can not rush towards scene in time simultaneously, can only, by making an inspection tour and find, incur loss through delay the repairing time on the way.The most of circuit in city belongs to cable line, overhead transmission line mixed type, and when line failure, being difficult to judgement is overhead transmission line fault or cable line fault, brings great difficulty to operation maintenance people finder fault.Found after cable line fault, can't distinguish fast reason, had a strong impact on cable inspection speed, reduced power supply reliability.
Summary of the invention
The object of the invention is, a kind of method of monitoring high voltage power cable operating condition is provided, when overload and overheated misoperation appear in cable, can find early, safeguard in advance and transfer load, avoid occurring cable fault.
Technical scheme of the present invention is that the present invention adopts a kind of high-tension cable failure monitoring device, monitors electric current and the temperature information of each phase of high voltage power cable two ends, and imports surveyed data into background monitoring, by backstage, sends misoperation alarm.
Described high-tension cable failure monitoring device is comprised of cable head current measuring device, head end temp sensor device, end current measurement mechanism and terminal temperature sensor device, power supply, remote terminal and background system.Head end current measuring device, head end temperature sensor and remote terminal are arranged on cable head; End current measurement mechanism and terminal temperature installation of sensors are at cable end piece; The data that current measuring device and temp sensor device are surveyed are imported background monitoring through remote terminal into by GPRS communication mode, and are sent misoperation alarm, sent short messages and notify operation maintenance personnel by background system.
The background system of described device is computer system or microprocessor.
High-tension cable failure monitoring device on-line monitoring cable methods of the present invention is as follows:
Utilize high-tension cable fault monitoring device on-line monitoring cable grounding of the present invention and short circuit, broken string situation, according to the current measuring device operating condition of cable both sides, compare failure judgement classification.
Singlephase earth fault, is that cable head occurs that electric current increases suddenly when singlephase earth fault occurring a kind of, and cable end piece electric current is constant; The 2nd, cable head occurs that electric current increases suddenly, and cable end piece electric current is zero, the 3rd, and cable head is zero, oppositely increasing appears in end current.
Two-phase cable short trouble, when there is two-phase cable short circuit, head end occurs that electric current increases suddenly, cable end piece electric current is zero.Cable single-phase wire break fault, when there is cable single-phase wire break fault, cable head is zero, end current is zero.
Cable fault is calculated and is compared the classification of failure judgement by above-mentioned technical method, data are imported background monitoring through remote terminal into by GPRS communication mode, the timely alarm of fault, the notice of sending short messages operation maintenance personnel.
The invention has the beneficial effects as follows, the inventive method practical, apparatus structure is simple, only need curent change and the temperature variation of Monitoring High Voltage Cable first and last end, just can judge the fault of cable, and fault accuracy of judgement, fault data can import backstage into by radio communication in time, and notifies maintainer by the mode of sending short messages.
The present invention is applicable to the malfunction monitoring of high-tension cable.
accompanying drawing explanation
Fig. 1 is high-tension cable failure monitoring system schematic diagram of the present invention;
Fig. 2 is cable earth fault current direction schematic diagram;
Fig. 3 is cable two-phase short-circuit fault current direction schematic diagram;
Picture in picture number: the 1st, head end cable current, temperature measuring equipment and remote terminal; The 2nd, end cable current, temperature measuring equipment; The 3rd, radio communication; The 4th, GPRS radio communication; The 5th, SMS; The 6th, background system; The 7th, cable line; I
0it is ground current; I
1it is head end electric current; I
2it is end current; I
1Bit is B phase head end electric current; I
2Bit is B phase end current; I
1Cit is C phase head end electric current; I
2Cit is C phase end current; I
dit is short-circuit current.
Embodiment
The specific embodiment of the invention is as follows.
Cable current measurement mechanism of the present invention, temperature measuring equipment and remote terminal unit are arranged on respectively to cable head and end, on-line monitoring cable grounding and short circuit, broken string situation, utilize the current measuring device operating condition of cable both sides to compare failure judgement classification.
Singlephase earth fault, as shown in Figure 2.When there is singlephase earth fault (as A phase), may there are three kinds of situations:
(1) there is electric current I in cable head
1increase cable end piece electric current I suddenly
2constant;
(2) there is electric current I in cable head
1increase cable end piece electric current I suddenly
2be zero;
(3) cable head I
1be zero, end current I
2occur oppositely increasing.
Above-mentioned three kinds of situations, all can judge by curent change or the temperature variation of monitoring cable first and last end.
Two-phase cable short trouble, as shown in Figure 3.There is electric current I in head end when there is two-phase cable short circuit (being short-circuited as between B phase and C phase)
1Band I
1Cincrease cable end piece electric current I suddenly
2Band I
2Cbe zero.
Cable single-phase wire break fault, when there is cable single-phase wire break fault, that phase head end electric current of cable cut line is zero, the end current of that phase is zero.
Cable fault is calculated and is compared by above-mentioned technical method, classification that can failure judgement, the electric current of monitoring and temperature data import background monitoring through remote terminal into by GPRS communication mode, the data that background system is relatively monitored by analysis, send in time misoperation alarm signal, concurrent SMS notification operation maintenance personnel.
Claims (3)
1. a high-tension cable fault monitoring method, is characterized in that, described method compares failure judgement classification according to the current measuring device operating condition of cable both sides, by high-tension cable fault monitoring device on-line monitoring cable grounding and short circuit, broken string situation:
(1) singlephase earth fault, is that cable head occurs that electric current increases suddenly when singlephase earth fault occurring a kind of, and cable end piece electric current is constant; The 2nd, cable head occurs that electric current increases suddenly, and cable end piece electric current is zero, the 3rd, and cable head is zero, oppositely increasing appears in end current;
(2) two-phase cable short trouble, when there is two-phase cable short circuit, head end occurs that electric current increases suddenly, cable end piece electric current is zero;
(3) cable single-phase wire break fault, when there is cable single-phase wire break fault, cable head is zero, end current is zero.
2. a high-tension cable fault monitoring method, is characterized in that, described high-tension cable fault monitoring device comprises current measuring device, temp sensor device and remote terminal, background system; Head end current measuring device, head end temperature sensor and remote terminal are arranged on cable head; End current measurement mechanism and terminal temperature installation of sensors are at cable end piece; The data that current measuring device and temp sensor device are surveyed are imported background monitoring through remote terminal into by GPRS communication mode, and send misoperation alarm signal by background system; Concurrent SMS notification operation maintenance personnel.
3. according to a kind of high-tension cable fault monitoring device described in claim 1 and 2, it is characterized in that, described background system is computer system or microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310481036.1A CN103529348B (en) | 2013-10-15 | 2013-10-15 | A kind of high tension cable fault monitoring method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310481036.1A CN103529348B (en) | 2013-10-15 | 2013-10-15 | A kind of high tension cable fault monitoring method |
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| Publication Number | Publication Date |
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| CN103529348A true CN103529348A (en) | 2014-01-22 |
| CN103529348B CN103529348B (en) | 2016-08-10 |
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| CN201310481036.1A Expired - Fee Related CN103529348B (en) | 2013-10-15 | 2013-10-15 | A kind of high tension cable fault monitoring method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021871A (en) * | 2014-04-17 | 2015-11-04 | 国家电网公司 | Method for determining leakage current of cable line under condition of incomplete information |
| CN106443302A (en) * | 2016-11-02 | 2017-02-22 | 龙滩水电开发有限公司龙滩水力发电厂 | Large-scale hydro-generator stator earth fault safe finding method |
| CN107831388A (en) * | 2017-11-03 | 2018-03-23 | 广州供电局有限公司 | The recognition methods of cluster 10kV cable runs overload and system |
| CN109490710A (en) * | 2018-11-23 | 2019-03-19 | 中国二十二冶集团有限公司 | The method for searching aluminium cable breakpoint |
| TWI697419B (en) * | 2017-12-04 | 2020-07-01 | 日商東芝股份有限公司 | Vehicle controller and electric vehicle |
| CN113092942A (en) * | 2021-04-09 | 2021-07-09 | 山西转型综改示范区有线网络有限公司 | Visual monitoring system for urban weak current cable |
| CN115469189A (en) * | 2022-10-10 | 2022-12-13 | 国网上海市电力公司 | Cable sheath fault judgment method based on sheath head-end current ratio and sheath circulation ratio |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611196A (en) * | 2011-08-16 | 2012-07-25 | 中国人民解放军军事交通学院 | 10KV power grid state monitoring and fault process automation system |
| CN102981102A (en) * | 2012-11-14 | 2013-03-20 | 天津市翔晟远电力设备实业有限公司 | Novel ring main unit state monitoring system |
-
2013
- 2013-10-15 CN CN201310481036.1A patent/CN103529348B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611196A (en) * | 2011-08-16 | 2012-07-25 | 中国人民解放军军事交通学院 | 10KV power grid state monitoring and fault process automation system |
| CN102981102A (en) * | 2012-11-14 | 2013-03-20 | 天津市翔晟远电力设备实业有限公司 | Novel ring main unit state monitoring system |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021871A (en) * | 2014-04-17 | 2015-11-04 | 国家电网公司 | Method for determining leakage current of cable line under condition of incomplete information |
| CN106443302A (en) * | 2016-11-02 | 2017-02-22 | 龙滩水电开发有限公司龙滩水力发电厂 | Large-scale hydro-generator stator earth fault safe finding method |
| CN107831388A (en) * | 2017-11-03 | 2018-03-23 | 广州供电局有限公司 | The recognition methods of cluster 10kV cable runs overload and system |
| CN107831388B (en) * | 2017-11-03 | 2020-01-07 | 广州供电局有限公司 | Method and system for identifying overload of cluster 10kV cable line |
| TWI697419B (en) * | 2017-12-04 | 2020-07-01 | 日商東芝股份有限公司 | Vehicle controller and electric vehicle |
| US10814725B2 (en) | 2017-12-04 | 2020-10-27 | Kabushiki Kaisha Toshiba | Vehicle controller and electric vehicle |
| CN109490710A (en) * | 2018-11-23 | 2019-03-19 | 中国二十二冶集团有限公司 | The method for searching aluminium cable breakpoint |
| CN113092942A (en) * | 2021-04-09 | 2021-07-09 | 山西转型综改示范区有线网络有限公司 | Visual monitoring system for urban weak current cable |
| CN115469189A (en) * | 2022-10-10 | 2022-12-13 | 国网上海市电力公司 | Cable sheath fault judgment method based on sheath head-end current ratio and sheath circulation ratio |
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|---|---|
| CN103529348B (en) | 2016-08-10 |
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