CN102508101A - Power cable operation fault monitoring terminal and system for detecting short circuit - Google Patents
Power cable operation fault monitoring terminal and system for detecting short circuit Download PDFInfo
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- CN102508101A CN102508101A CN2011103523905A CN201110352390A CN102508101A CN 102508101 A CN102508101 A CN 102508101A CN 2011103523905 A CN2011103523905 A CN 2011103523905A CN 201110352390 A CN201110352390 A CN 201110352390A CN 102508101 A CN102508101 A CN 102508101A
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Abstract
The embodiment of the invention provides a power cable operation fault monitoring terminal and a power cable operation fault monitoring system for detecting a short circuit. The terminal comprises three detectors which are arranged on three phases of a cable line respectively, and a communication host machine which is connected with the three detectors; the three detectors are used for sending a short circuit fault report to the communication host machine when detecting that the line current of the corresponding phase meets the preset condition, and the communication host machine sends the fault report to a monitoring center; and the preset condition is that: inrush current which is more than four times or four times a normal load current value exists in the line, the duration of the inrush current is not more than 3 seconds, and the line current is zero after the inrush current lasts for 3 seconds.
Description
Technical field
The invention belongs to the power technology field, relate in particular to a kind of power cable operation troubles monitor terminal and system that realizes short-circuit detecting.
Background technology
Along with computer technology, gordian techniquies such as the communication technology constantly are introduced into each link of electrical production, and increasing problem also is able to solve thereupon in the electrical production, and has obtained better development, makes electrical production safer, stable, efficient and energy-conservation.
However, power circuit moves outside people's sight line for a long time, makes it difficult in maintenance, thereby causes the cable fault of operation throughout the year to take place frequently, and especially in peak of power consumption period, failure rate is higher.In case break down, it is difficult to search the fault ten minutes.Though can use some instruments to measure the approximate location of cable, many with intersecting side by side in worker's well with cables, cause to be difficult to failure judgement on earth on any root cable, and the fault judgement mistake can cause very serious consequence.For fear of the problems referred to above, need usually manual work one by one worker's well remove to seek cable louding, and seek the cable break down.The Breakdown Maintenance of the cable long for circuit, that intermediate head is many need consume great amount of manpower and material resources.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of power cable operation troubles monitor terminal and system that realizes short-circuit detecting, can locate short trouble quickly and accurately.
Be to realize above-mentioned purpose, one embodiment of the present of invention provide a kind of power cable operation troubles monitor terminal of realizing short-circuit detecting, comprising: be respectively installed to three detecting devices on the cable line three-phase, and with said three host computer communications that detecting device is connected;
Said three detecting devices are used for when the line current that detects corresponding phase satisfies predetermined condition, send the short trouble report to host computer communication, and by host computer communication this Trouble Report are sent to Surveillance center;
Said predetermined condition is:
Four times mutation current more than or equal to the normal load current value appears in the circuit, and
The duration of this mutation current was no more than for 3 seconds, and
Line current was zero after mutation current continued for 3 seconds.
An alternative embodiment of the invention provides a kind of power cable operation troubles supervisory system that realizes short-circuit detecting, comprises Surveillance center and at least one power cable operation troubles monitor terminal like above-mentioned realization short-circuit detecting.
According to the embodiment of the invention; Effectively the operation of monitoring cable state, and when failed because, notify Surveillance center immediately, improved the work efficiency that inspection is safeguarded; Alleviate staff's labour intensity, and can locate short trouble quickly and accurately.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the synoptic diagram of an embodiment of the power cable operation troubles monitor terminal of realization short-circuit detecting provided by the invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Embodiment one
Fig. 1 shows the synoptic diagram of an embodiment of the power cable operation troubles monitor terminal of realization short-circuit detecting provided by the invention; This monitor terminal comprises three detecting device 101a, 101b and 101c on the ABC three-phase that is installed in cable line; Suppose especially that in the present embodiment detecting device 101a is installed in A and goes up mutually; Detecting device 101b is installed in B and goes up mutually, and detecting device 101c is installed in C and goes up mutually.Three detecting device 101a, 101b and 101c are installed on the same host computer communication 102 jointly.
Each detecting device can obtain the line current of its place phase respectively, and for example detecting device 101a is installed in A and goes up mutually, can obtain the line current of A phase.
Each detecting device is after obtaining line current; Whether the line current that can detect corresponding phase satisfies the predetermined condition of short trouble; If Mazu; Then detecting device sends the short trouble report to connected host computer communication 102, and this Trouble Report is sent to the Surveillance center of network one side by host computer communication 102.
During distribution line generation phase fault; Very big electric current can be flow through on the direct loop in transformer station and trouble spot; Simultaneously the protective relaying device of electric substation can start protection according to the rule that realizes setting, and makes the line tripping breakpoint, comprehensive above-mentioned situation; In the present embodiment, the predetermined condition of above-mentioned short trouble is:
Four times mutation current more than or equal to the normal load current value appears in the circuit, and;
The duration of this mutation current was no more than for 3 seconds, its;
Mutation current continued after 3 seconds, and line circuit is zero, and promptly circuit is in power down mode.
In reality, normally be responsible for electric current and be 80A when above, can be more than the 350A with the value defined that is four times in the normal load current value.
In whole power cable system; In each position that need monitor the monitor terminal in the present embodiment is installed; And three detecting devices in the monitor terminal are installed on the monitoring position place three-phase line; When short trouble appears in certain position of certain root cable, the monitor terminal that is installed in this position of this cable will report the short trouble report from trend Surveillance center.Surveillance center can number all monitor terminals in the total system in advance; And the installation site of writing down the monitor terminal of each numbering; Surveillance center just can be according to the label of the monitor terminal that sends the short trouble report like this, the position of location failed because.
Certainly; Also can in the monitor terminal at the scene a GPS module be set; Communication host is before sending to monitoring with the short trouble report; Read the current position coordinates that the GPS module is obtained simultaneously, and send to Surveillance center in the lump together with the short trouble report, Surveillance center also can obtain the positional information of failed because like this.
In the present embodiment, the communication host in the monitor terminal can be supplied power by solar storage battery, and directly charges to battery through solar panels, thereby further reduces the number of times that the work committee member safeguards this monitor terminal.
In addition, communication host can have the gsm communication module, and this module is used ICP/IP protocol, and like this, communication host can report that the mode through wireless GPRS is uploaded to Surveillance center with short trouble.
Monitor terminal in the present embodiment effectively monitoring cable operation state; And when failed because, notify Surveillance center immediately; Improved the work efficiency that inspection is safeguarded, alleviated staff's labour intensity, and can locate short trouble quickly and accurately.
Embodiment two
Another embodiment of the present invention also provides a kind of power cable operation troubles supervisory system that realizes short-circuit detecting, and this system comprises Surveillance center and at least one monitor terminal a kind of like embodiment.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (2)
1. a power cable operation troubles monitor terminal of realizing short-circuit detecting is characterized in that, comprising: be respectively installed to three detecting devices on the cable line three-phase, and with said three host computer communications that detecting device is connected;
Said three detecting devices are used for when the line current that detects corresponding phase satisfies predetermined condition, send the short trouble report to host computer communication, and by host computer communication this Trouble Report are sent to Surveillance center;
Said predetermined condition is:
Four times mutation current more than or equal to the normal load current value appears in the circuit, and
The duration of this mutation current was no more than for 3 seconds, and
Line current was zero after mutation current continued for 3 seconds.
2. a power cable operation troubles supervisory system that realizes short-circuit detecting is characterized in that, comprises the power cable operation troubles monitor terminal of Surveillance center and at least one realization short-circuit detecting described in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103523905A CN102508101A (en) | 2011-11-09 | 2011-11-09 | Power cable operation fault monitoring terminal and system for detecting short circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103523905A CN102508101A (en) | 2011-11-09 | 2011-11-09 | Power cable operation fault monitoring terminal and system for detecting short circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102508101A true CN102508101A (en) | 2012-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103523905A Pending CN102508101A (en) | 2011-11-09 | 2011-11-09 | Power cable operation fault monitoring terminal and system for detecting short circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001325A (en) * | 2012-09-29 | 2013-03-27 | 北京康力昆泰电力技术有限公司 | Intelligent network distribution system based on Beidou satellite communication system |
| CN103439625A (en) * | 2013-09-03 | 2013-12-11 | 北京豪锐达科技有限公司 | Cable system fault positioning and load monitoring method |
| CN104459469A (en) * | 2014-12-09 | 2015-03-25 | 国家电网公司 | Fault detection technology for distribution circuit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2515683Y (en) * | 2001-12-26 | 2002-10-09 | 北京浩华星电气设备技术开发有限公司 | Short-circuit and earth-fault indicator |
| CN2862215Y (en) * | 2005-05-18 | 2007-01-24 | 北京浩华星电气设备技术开发有限公司 | Wireless fault indicating device |
-
2011
- 2011-11-09 CN CN2011103523905A patent/CN102508101A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2515683Y (en) * | 2001-12-26 | 2002-10-09 | 北京浩华星电气设备技术开发有限公司 | Short-circuit and earth-fault indicator |
| CN2862215Y (en) * | 2005-05-18 | 2007-01-24 | 北京浩华星电气设备技术开发有限公司 | Wireless fault indicating device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001325A (en) * | 2012-09-29 | 2013-03-27 | 北京康力昆泰电力技术有限公司 | Intelligent network distribution system based on Beidou satellite communication system |
| CN103439625A (en) * | 2013-09-03 | 2013-12-11 | 北京豪锐达科技有限公司 | Cable system fault positioning and load monitoring method |
| CN104459469A (en) * | 2014-12-09 | 2015-03-25 | 国家电网公司 | Fault detection technology for distribution circuit |
| CN104459469B (en) * | 2014-12-09 | 2017-09-12 | 国家电网公司 | A kind of distribution line failure detection method |
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Application publication date: 20120620 |