CN104535891A - Distribution line fault detection method - Google Patents
Distribution line fault detection method Download PDFInfo
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- CN104535891A CN104535891A CN201410782339.1A CN201410782339A CN104535891A CN 104535891 A CN104535891 A CN 104535891A CN 201410782339 A CN201410782339 A CN 201410782339A CN 104535891 A CN104535891 A CN 104535891A
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- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 238000004891 communication Methods 0.000 claims abstract description 27
- 239000000835 fiber Substances 0.000 claims abstract description 22
- 230000003287 optical effect Effects 0.000 claims abstract description 22
- 238000005070 sampling Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 17
- 238000001914 filtration Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000013307 optical fiber Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000012723 sample buffer Substances 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 3
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a distribution line fault detection method. The distribution line fault detection method mainly relates to a current transformer, an electronic controller, a fiber optical transceiver, a temperature sensor, a power distribution network computer terminal and a faulty section communication device. The distribution line fault detection method has the advantages that a fault point can be found as soon as possible, the reason for a fault is checked, the fault is eliminated, the detection precision is high under the condition that safe and reliable operation of a power grid is ensured, and the distribution line fault detection method is broader in application prospect.
Description
Technical field
The present invention relates to a kind of distribution line failure detection method.
Background technology
Along with deepening constantly of China's electrical network reform, have higher requirement to power supply reliability and security, in order to reduce power off time and the frequency of power cut of user side, promote the satisfaction of Electricity customers, the fault handling mode of power distribution network and method are particularly important.Distribution network failure process to be needed by feeder automation or Distribution Automation Technology means, accomplishes fault fast report, quick diagnosis, quick position, fast isolation and fast quick-recovery, realizes power distribution network rapidly self-healing.Current distribution line installs circuit position finder usually, once line failure, track walker can by the alarm indication unit of addressing device, the localization of faults, fix a breakdown, but shortcoming be cannot fast, accurate failure judgement section, the section of patrolling length consuming time, difficulty are large, can not process timely and effectively accident, easily cause grid loss.
Summary of the invention
The object of this invention is to provide a kind of distribution line failure detection method, to overcome currently available technology above shortcomings.
The object of the invention is to be achieved through the following technical solutions:
A kind of distribution line failure detection method, mainly comprises and becomes part as under group:
Current transformer, electronic controller, fiber optical transceiver, temperature sensor, power distribution network computer terminal, faulty section communication apparatus.
A kind of distribution line failure pick-up unit connection method, comprise following describing, described current transformer is set on distribution line and gathers line current signal, the signal output part of described current transformer is connected with the signals collecting end of described electronic controller, the output terminal of described electronic controller is connected to described fiber optical transceiver, the output terminal of described fiber optical transceiver is connected to described temperature sensor, the output terminal of described temperature sensor is connected to described power distribution network computer terminal, and the output terminal of described power distribution network computer terminal is connected to described faulty section communication module.
Further, described current transformer gathers line current signal, the signals collecting termination of described electronic controller receives the line current signal from described current transformer, when normal line current first time is by described electronic controller or when being fault current when line circuit and reaching the preset value of electronic controller setting, the steering order output terminal of described electronic controller sends corresponding control signal respectively; Described fiber optical transceiver is used for the digital current signal after by process and is uploaded to distribution terminal by optical fiber as a data frame; Described temperature sensor is used for compensating described digital current signal under extreme temperature environment, and wherein, extreme ambient temperature comprises thermal extremes environment and extreme low temperature environment; The receiving end of described power distribution network computer terminal is connected with described temperature sensor output terminal; Described faulty section communication module receives the control signal from described power distribution network computer terminal, by network communication system, the information of installing place on line and line status is sent to the described faulty section communication module being provided with and specifying receiver, realizes described faulty section communication module to the condition monitoring of distribution line.
Further, described temperature sensor is specially compensating digital current signal under the extreme temperature environment of place: if thermal extremes environment, then the value of described digital current signal reduces accordingly; If extreme low temperature environment, then the value of described digital current signal increases accordingly.
Further, outside described electronic controller, be provided with shielding box, to ensure, to described electronic controller, there is shield electromagnetic interference and protective effect, improve fault detection accuracy.
A kind of principle of work of distribution line failure detection method, distribution line failure detection method, the digital current signal that described current transformer receives by described electronic controller is filled in sampling buffer successively, after sampling buffer is filled up, according to the current average of digital current signal in the second time interval calculating sampling buffer zone of setting, wherein, this sampling buffer is the region of temporary sampled data in primary controller; When sampling buffer has 18, the digital current signal of corresponding A phase is filled into the sampling buffer of A phase, namely the sampling buffer of A phase is filled with after 18S, after this 1 new digital current signal of sampling again enters sampling buffer, then in present sample buffer zone, 1 digital current signal of foremost is extruded.Second time interval can be set as 1 second, then, after sampling buffer is filled up, calculated a mean value every 1 second.The process of the digital signal of B phase, C phase is similar, and three carries out independently adopting in buffer zone.Very first time interval and second time interval can be the same or different.Current average is filled to average buffer, and mean value previous in current average and average buffer is compared, this average buffer is the region of temporary mean value in primary controller, and A phase, B phase and C phase have separately independently average buffer, corresponding respective sampling buffer.Namely A phase digital current signal is packed into A phase and adopts buffer zone, and the equal average of A of calculating puts into A phase average buffer zone, judges whether A phase there occurs fault.Same, also independently identical operation is carried out to the digital current signal in B phase and C phase.If the absolute value of the difference of current average and previous mean value is greater than preset value, it is then trouble spot, and trouble spot is uploaded to described power distribution network computer terminal by described fiber optical transceiver as a data frame, be sent to described faulty section communication apparatus by described power distribution network computer terminal; If the absolute value of the difference of current average and previous mean value is not more than preset value, then digital current signal is uploaded to described power distribution network computer terminal by described fiber optical transceiver as a data frame, described faulty section communication apparatus is being sent to by described power distribution network computer terminal, user can this preset value of sets itself, in the present embodiment, this preset value is 20%.By carrying out above-mentioned process to digital current signal, can effectively filtering non-faulting point.
Beneficial effect of the present invention: can find trouble spot as early as possible, to find out failure cause, elimination fault, when guaranteeing power grid security reliability service, accuracy of detection is high, and then makes this distribution line failure detection method have more wide application.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the distribution line failure testing circuit according to the embodiment of the present invention.
In figure:
1, current transformer; 2, electronic controller; 3, fiber optical transceiver; 4, temperature sensor; 5, power distribution network computer terminal; 6, faulty section communication apparatus.
Embodiment
Be clearly and completely described the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain, all belongs to the scope of protection of the invention.
According to embodiments of the invention, provide a kind of distribution line failure checkout equipment, mainly comprise following ingredient:
Current transformer 1, electronic controller 2, fiber optical transceiver 3, temperature sensor 4, power distribution network computer terminal 5, faulty section communication apparatus 6.
According to embodiments of the invention, provide a kind of distribution line failure detection method, comprise following describing, described current transformer 1 is set on distribution line and gathers line current signal, the signal output part of described current transformer 1 is connected with the signals collecting end of described electronic controller 2, the output terminal of described electronic controller 2 is connected to described fiber optical transceiver 3, the output terminal of described fiber optical transceiver 3 is connected to described temperature sensor 4, the output terminal of described temperature sensor 4 is connected to described power distribution network computer terminal 5, the output terminal of described power distribution network computer terminal 5 is connected to described faulty section communication module 6.
In one embodiment, described current transformer 1 gathers line current signal, the signals collecting termination of described electronic controller 2 receives the line current signal from described current transformer 1, when normal line current first time is by described electronic controller 2 or when being fault current when line circuit and reaching the preset value of described electronic controller 2 setting, the steering order output terminal of described electronic controller 2 sends corresponding control signal respectively; Described fiber optical transceiver 3 is for uploading the digital current signal after process by optical fiber as a data frame; Described temperature sensor 4 for compensating digital current signal under extreme temperature environment, and wherein, extreme ambient temperature comprises thermal extremes environment and extreme low temperature environment; The receiving end of described power distribution network computer terminal 5 is connected with described temperature sensor 4 output terminal; Described faulty section communication module 6 receives the control signal from described power distribution network computer terminal 5, by network communication system, the information of installing place on line and line status is sent to the described faulty section communication module 6 being provided with and specifying receiver, realizes the condition monitoring of described faulty section communication module 6 pairs of distribution lines.
In one embodiment, under described temperature sensor 4 pairs of place extreme temperature environment, digital current signal is compensated and be specially: if thermal extremes environment, then the value of described digital current signal reduces accordingly; If extreme low temperature environment, then the value of described digital current signal increases accordingly.
In one embodiment, outside described electronic controller 2, be provided with shielding box, to ensure, to described electronic controller 2, there is shield electromagnetic interference and protective effect, improve fault detection accuracy.
According to embodiments of the invention, provide a kind of method of work of distribution line failure detection method, distribution line failure detection method, the digital current signal that described current transformer 1 receives is filled in sampling buffer by described electronic controller 2 successively, after sampling buffer is filled up, according to the current average of digital current signal in the second time interval calculating sampling buffer zone of setting, wherein, this sampling buffer is the region of temporary sampled data in described electronic controller 2; When sampling buffer has 18, the digital current signal of corresponding A phase is filled into the sampling buffer of A phase, namely the sampling buffer of A phase is filled with after 18S, after this 1 new digital current signal of sampling again enters sampling buffer, then in present sample buffer zone, 1 digital current signal of foremost is extruded.Second time interval can be set as 1 second, then, after sampling buffer is filled up, calculated a mean value every 1 second.The process of the digital signal of B phase, C phase is similar, and three carries out independently adopting in buffer zone.Very first time interval and second time interval can be the same or different.Current average is filled to average buffer, and mean value previous in current average and average buffer is compared, this average buffer is the region of temporary mean value in primary controller, and A phase, B phase and C phase have separately independently average buffer, corresponding respective sampling buffer.Namely A phase digital current signal is packed into A phase and adopts buffer zone, and the equal average of A of calculating puts into A phase average buffer zone, judges whether A phase there occurs fault.Same, also independently identical operation is carried out to the digital current signal in B phase and C phase.If the absolute value of the difference of current average and previous mean value is greater than preset value, it is then trouble spot, and trouble spot is uploaded to described power distribution network computer terminal 5 by described fiber optical transceiver 3 as a data frame, be sent to described faulty section communication apparatus 6 by described power distribution network computer terminal 5; If the absolute value of the difference of current average and previous mean value is not more than preset value, then digital current signal is uploaded to described power distribution network computer terminal 5 by described fiber optical transceiver 3 as a data frame, described faulty section communication apparatus 6 is being sent to by described power distribution network computer terminal 5, user can this preset value of sets itself, in this example, this preset value is 20%.By carrying out above-mentioned process to digital current signal, can effectively filtering non-faulting point.
Conveniently understand technique scheme of the present invention, below by way of in concrete use-pattern, technique scheme of the present invention is described in detail.
When specifically using, described current transformer 1 is set on distribution line and gathers line current signal, the signal output part of described current transformer 1 is connected with the signals collecting end of described electronic controller 2, the signals collecting termination of described electronic controller 2 receives the line current signal from described current transformer 1, when normal line current first time is by described electronic controller 2 or when being fault current when line circuit and reaching the preset value of described electronic controller 2 setting, the steering order output terminal of described electronic controller 2 sends corresponding control signal respectively, when fault current exceeds preset value, data are passed to described power distribution network computer terminal 5 by described fiber optical transceiver 3 by described electronic controller 2, described temperature sensor 4 is provided with between described fiber optical transceiver 3 and described power distribution network computer terminal 5, guarantee accuracy and the promptness of transmitted data, then described power distribution network computer terminal 5 is sent to described faulty section communication module 6 after treatment, thus make person skilled can go maintenance fast.
Can find trouble spot as early as possible by above-mentioned detection method, to find out failure cause, elimination fault, when guaranteeing power grid security reliability service, accuracy of detection is high, and then makes this distribution line failure detection method have more wide application.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a distribution line failure detects, and it is characterized in that, mainly comprises following ingredient:
Current transformer (1), electronic controller (2), fiber optical transceiver (3), temperature sensor (4), power distribution network computer terminal (5), faulty section communication apparatus (6).
2. distribution line failure pick-up unit connection method as claimed in claim 1, it is characterized in that, described current transformer (1) is set on distribution line and gathers line current signal, the signal output part of described current transformer (1) is connected with the signals collecting end of described electronic controller (2), the output terminal of described electronic controller (2) is connected to described fiber optical transceiver (3), the output terminal of described fiber optical transceiver (3) is connected to described temperature sensor (4), the output terminal of described temperature sensor (4) is connected to described power distribution network computer terminal (5), the output terminal of described power distribution network computer terminal (5) is connected to described faulty section communication module (6).
3. distribution line failure detection method as claimed in claim 2, it is characterized in that, described current transformer (1) gathers line current signal, the signals collecting termination of described electronic controller (2) receives the line current signal from described current transformer (1), when normal line current first time is by described electronic controller (2) or when being fault current when line circuit and reaching the preset value that described electronic controller (2) sets, the steering order output terminal of described electronic controller (2) sends corresponding control signal respectively; Described fiber optical transceiver (3) is for uploading the digital current signal after process by optical fiber as a data frame; Described temperature sensor (4) for compensating digital current signal under extreme temperature environment, and wherein, extreme ambient temperature comprises thermal extremes environment and extreme low temperature environment; The receiving end of described power distribution network computer terminal (5) is connected with described temperature sensor (4) output terminal; Described faulty section communication module (6) receives the control signal from described power distribution network computer terminal (5), by network communication system, the information of installing place on line and line status is sent to the described faulty section communication module (6) being provided with and specifying receiver, realizes described faulty section communication module (6) to the condition monitoring of distribution line.
4. distribution line failure detection method according to claim 2, it is characterized in that, described temperature sensor (4) is specially compensating digital current signal under the extreme temperature environment of place: if thermal extremes environment, then the value of described digital current signal reduces accordingly; If extreme low temperature environment, then the value of described digital current signal increases accordingly.
5. distribution line failure detection method according to claim 2; it is characterized in that; described electronic controller is provided with shielding box outside (2), to ensure having shield electromagnetic interference and protective effect to described electronic controller (2), improves fault detection accuracy.
6. distribution line failure detection method according to claim 2, it is characterized in that, the digital current signal that described current transformer (1) receives is filled in sampling buffer by described electronic controller (2) successively, after sampling buffer is filled up, according to the current average of digital current signal in the second time interval calculating sampling buffer zone of setting, wherein, this sampling buffer is the region of temporary sampled data in described electronic controller (2); When sampling buffer has 18, the digital current signal of corresponding A phase is filled into the sampling buffer of A phase, namely the sampling buffer of A phase is filled with after 18S, after this 1 new digital current signal of sampling again enters sampling buffer, then in present sample buffer zone, 1 digital current signal of foremost is extruded, second time interval can be set as 1 second, then after sampling buffer is filled up, a mean value is calculated every 1 second, the process of the digital signal of B phase, C phase is similar, and three carries out independently adopting in buffer zone;
Very first time interval and second time interval can be the same or different, current average is filled to average buffer, and mean value previous in current average and average buffer is compared, this average buffer is the region of temporary mean value in primary controller, A phase, B phase and C phase have separately independently average buffer, corresponding respective sampling buffer, namely A phase digital current signal is packed into A phase and adopts buffer zone, the equal average of A calculated puts into A phase average buffer zone, judges whether A phase there occurs fault; Same, also independently identical operation is carried out to the digital current signal in B phase and C phase, if the absolute value of the difference of current average and previous mean value is greater than preset value, it is then trouble spot, and trouble spot is uploaded to described power distribution network computer terminal (5) by described fiber optical transceiver (3) as a data frame, be sent to described faulty section communication apparatus (6) by described power distribution network computer terminal (5); If the absolute value of the difference of current average and previous mean value is not more than preset value, then digital current signal is uploaded to described power distribution network computer terminal (5) by described fiber optical transceiver (3) as a data frame, described faulty section communication apparatus (6) is being sent to by described power distribution network computer terminal (5), user can this preset value of sets itself, in this example, this preset value is 20%; By carrying out above-mentioned process to digital current signal, can effectively filtering non-faulting point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410782339.1A CN104535891A (en) | 2014-12-16 | 2014-12-16 | Distribution line fault detection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410782339.1A CN104535891A (en) | 2014-12-16 | 2014-12-16 | Distribution line fault detection method |
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| CN104535891A true CN104535891A (en) | 2015-04-22 |
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| CN201410782339.1A Pending CN104535891A (en) | 2014-12-16 | 2014-12-16 | Distribution line fault detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693445A (en) * | 2018-05-23 | 2018-10-23 | 广东电网有限责任公司 | Fault positioning method and device for power transmission cable |
| CN113484686A (en) * | 2021-07-20 | 2021-10-08 | 河北地质大学 | Power line fault position determining method, device and terminal |
-
2014
- 2014-12-16 CN CN201410782339.1A patent/CN104535891A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693445A (en) * | 2018-05-23 | 2018-10-23 | 广东电网有限责任公司 | Fault positioning method and device for power transmission cable |
| CN113484686A (en) * | 2021-07-20 | 2021-10-08 | 河北地质大学 | Power line fault position determining method, device and terminal |
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Application publication date: 20150422 |