CN103308820A - Power grid fault positioning system - Google Patents

Power grid fault positioning system Download PDF

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Publication number
CN103308820A
CN103308820A CN2012100626942A CN201210062694A CN103308820A CN 103308820 A CN103308820 A CN 103308820A CN 2012100626942 A CN2012100626942 A CN 2012100626942A CN 201210062694 A CN201210062694 A CN 201210062694A CN 103308820 A CN103308820 A CN 103308820A
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China
Prior art keywords
fault
signal
default
branched line
current
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Pending
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CN2012100626942A
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Chinese (zh)
Inventor
方志杰
叶丹
陆凯华
楼海明
谢锦文
谢铖
余新江
陈天恩
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Jiande power supply bureau
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Jiande power supply bureau
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Publication date
Application filed by Jiande power supply bureau filed Critical Jiande power supply bureau
Priority to CN2012100626942A priority Critical patent/CN103308820A/en
Publication of CN103308820A publication Critical patent/CN103308820A/en
Pending legal-status Critical Current

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Abstract

The invention provides a power grid fault positioning system and a method. The system comprises a fault indicator which is arranged on a branch line of a power grid and sends a fault signal comprising the branch line information when detecting preset fault current on the branch line, a communication terminal which is connected with the fault indicator, receives the fault signal sent by the fault indicator and sends the fault signal, and a fault positioning module which receives the fault signal and determines the position of a fault point according to the fault signal. According to the system, people do not need to use a piecewise power outage method to query the fault point, and thus the stability of power supply of the power grid is improved.

Description

A kind of electric network fault positioning system
Technical field
The present invention relates to power domain, relate in particular to a kind of electric network fault detection system.
Background technology
At present, when electrical network breaks down, in order to find out the trouble spot, usually adopt the method for power transmission lines being carried out the segmentation investigation, that is: power transmission lines is carried out segmentation, disconnect being connected of each section transmission line and electrical network successively, whether the power transmission lines that manual measurement disconnects exists fault, so that the circuit at localization of faults place.This method of searching the trouble spot be because will disconnect every section circuited transmission successively, thus can cause the power failure in non-fault zone, thus influence the stability of mains supply.
Summary of the invention
In view of this, the invention provides a kind of electric network fault positioning system, purpose is to solve existing electric network fault localization method influences the stability of mains supply because of the power failure that causes the non-fault zone problem.
A kind of electric network fault positioning system comprises:
Be arranged on the branched line of described electrical network, during default fault current on detecting described branched line, send the fault detector of the fault-signal that comprises described branched line information;
Link to each other with described fault detector, receive the fault-signal that described fault detector sends, and the communication terminal that described fault-signal is sent;
Receive described fault-signal, and according to described fault-signal, the localization of fault module of localization of faults position.
Preferably, described fault detector comprises:
Detect first detecting unit whether default short-circuit current is arranged on the described branched line;
When detecting default short-circuit current, send first transmitter unit of described fault-signal.
Preferably, described default short-circuit current comprises:
In the default time, increase to default peak value and by the electric current of described default peak value vanishing by initial value.
Preferably, described fault detector comprises:
The signal source of emission single-phase earth fault current sequence on the described branched line;
Detect second detecting unit whether described single-phase earth fault current sequence is arranged on the described branched line;
When detecting described single-phase earth fault current, send second transmitter unit of described fault-signal.
Preferably, described fault detector also comprises:
During fault current on detecting described branched line, send the alarm unit of alerting signal.
Preferably, described localization of fault module comprises:
Receive the receiving element of described fault-signal;
The geographic information database of the geographical location information that storage is default;
According to described fault-signal and geographic information database, determine the position determination unit in the geographic position of described trouble spot.
Preferably, described system also comprises:
The position of described trouble spot is sent to the position of failure point transmitting element of default terminal.
Preferably, described system also comprises:
The display unit that the position of described trouble spot is shown.
Preferably, described system also comprises:
Store the stored data base of the position of described trouble spot.
A kind of electric network fault localization method is used for said system, comprising:
When described fault detector detects default fault current on the described branched line, send the fault-signal that comprises described branched line information;
Described communication terminal receives the fault-signal that described fault detector sends, and described fault-signal is sent;
Described localization of fault module receives described fault-signal, and according to described fault-signal, localization of faults position.
Electric network fault detection system and method that the embodiment of the invention provides, by the line of electric force in electrical network fault detector is set, fault-signal can be sent to locating terminal, locating terminal carries out the status according to Geographic Information System with the trouble spot, and the method that does not need to be had a power failure by artificial employing segmentation is again inquired about the trouble spot, thereby has improved the stability of mains supply.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only 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 structural representation of the disclosed a kind of electric network fault positioning system of the embodiment of the invention;
Fig. 2 is the structural representation of localization of fault module in the disclosed a kind of electric network fault positioning system of the embodiment of the invention;
Fig. 3 is the structural representation of a kind of fault detector in the disclosed electric network fault positioning system of the embodiment of the invention;
Fig. 4 is the structural representation of another fault detector in the disclosed a kind of electric network fault positioning system of the embodiment of the invention;
Fig. 5 is the process flow diagram of the disclosed a kind of electric network fault localization method of the embodiment of the invention.
Embodiment
The invention discloses a kind of electric network fault positioning system, be used for the position of the trouble spot of location electrical network automatically, its core inventive point is, described system comprises: be arranged on the branched line of described electrical network, during fault current on detecting described branched line, send the fault detector of fault-signal; Receive the fault-signal that described fault detector sends, and the communication terminal that described fault-signal is sent; According to described fault-signal, the localization of fault module of localization of faults position.Described system is the particular location of fault location point fast, and no longer needs manually to detect successively each section power circuit.
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
A kind of electric network fault positioning system disclosed by the invention is applied in the existing power network, and as shown in Figure 1, described system comprises:
Fault detector 101 is arranged on every branched line in the electrical network, and the default fault current for detection of on the branched line of place when detecting default fault current, outwards sends fault-signal;
General, can a fault detector all be set for every branched line, also can be for a branched line arrange a plurality of fault detectors, the quantity of the fault detector that arranges at branched line is more many, and system is just more sensitive to the reaction of electric network fault.
Communication terminal 102 is used for receiving the fault-signal that described fault detector sends, and described fault-signal is sent;
Optionally, communication terminal can be arranged at the bifurcation of circuit in the electrical network, a communication terminal can be accepted the fault-signal that a plurality of fault detectors send simultaneously, general, the communication range of fault detector and communication terminal is 2 meters to 10 meters, sends failure message can for this communication terminal with the fault detector of distance in this scope of communication terminal.Communication terminal can adopt the mode of radio communication to accept or send fault-signal, for example adopts the communication mode of GSM or GPRS.
Localization of fault module 103 is used for according to described fault-signal localization of faults position.
Preferably, as shown in Figure 2, the localization of fault module specifically can comprise:
Receiving element 201 is used for receiving fault-signal;
Geographic information database 202 is used for the geographical location information that electrical network that storage sets in advance covers, i.e. each bar circuit corresponding physical position coordinates in the electrical network can be specific to the physical location coordinate of each point on each bar circuit;
Position determination unit 203 is used for determining the geographic position of described trouble spot according to described fault-signal and geographic information database.
Particularly, can comprise the information of fault branch circuit in the fault-signal, the numbering of fault branch circuit for example, position determination unit be according to the numbering of fault detector, and the combining geographic information database just can be determined the particular location of fault detector.
This device that utilizes Geographic Information System that failure message is positioned had both avoided manually searching the loaded down with trivial details of trouble spot, can improve the accuracy of location again.
Preferably, described system can also comprise:
Transmitting element is used for after determining the position of trouble spot positional information sent to default terminal
Default terminal can be maintenance personal's communication facilities, so that the maintenance personal makes timely processing to fault.
Perhaps,
Display unit is used for the position of described trouble spot is shown that concrete display mode can show for each the bar branch road with electrical network, and marks out the position of trouble spot therein.
Perhaps,
Stored data base is for the position of the described trouble spot of storage.
Perhaps, arbitrary combination of transmitting element, display unit and stored data base three.
Wherein transmitting element, display unit and stored data base both can independently be set to the unit in the system, also can be integrated in the localization of fault module, and present embodiment is not done restriction.
The described electric network fault positioning system of present embodiment, by fault detector detection failure electric current, and transmission fault-signal, localization of fault module combining geographic information system positions the trouble spot, just can orient the trouble spot and need that no longer electrical network is carried out the segmentation power failure, improve the stability of mains supply.
Further, fault current default described in the present embodiment can be short-circuit current and/or single-phase earth fault current sequence, and corresponding, as shown in Figure 3, the fault detector described in the present embodiment can specifically comprise:
First detecting unit 301 is for detection of short-circuit current default on the described branched line;
Wherein, default short-circuit current is in the default time, increases to default peak value and by the electric current of described default peak value vanishing by currency.For example, if the currency of electric current is 100A, in the default time, detected electric current is increased to 1000A by 100A, is reduced to 0A again, then illustrates to have short-circuit current on the branched line.
First transmitter unit 302 is used for sending described fault-signal when detecting default short-circuit current.
Perhaps, as shown in Figure 4, described fault detector can specifically comprise:
Signal source 401 is used for launching the single-phase earth fault current sequence on described branched line;
Optionally, described signal source is arranged in the transformer station, after earth fault continues for some time, signal source triggers A.C. contactor, begin to send the fault current sequence, when this current sequence can be crossed faulty line together, and can not pass through non-fault line, so the fault detector on the faulty line can detect this fault current sequence.
Second detecting unit 402 is for detection of the above single-phase earth fault current sequence of described branched line;
Second transmitter unit 403 is used for sending described fault-signal when detecting described single-phase earth fault current.
Wherein, fault detector as described in Figure 3 can detect the short trouble of circuit, and fault detector as shown in Figure 4 can detect the singlephase earth fault of circuit, in actual applications, the structure of fault detector can be as described in Figure 3, perhaps as shown in Figure 4, perhaps for realize can detection line short trouble also can detection line singlephase earth fault, Fig. 3 and structure shown in Figure 4 can be carried out integratedly, the indicating fault implement body after integrated comprises:
Signal source is used for launching the single-phase earth fault current sequence on described branched line;
Detecting unit is for detection of short-circuit current or described single-phase earth fault current sequence default on the described branched line;
Transmitter unit is used for sending described fault-signal when detecting default short-circuit current and/or described single-phase earth fault current sequence.
Above-mentioned fault detector is for detection of the fault of place branched line, and hardware configuration is easy to realize, is laying a good foundation of localization of fault.
Further, described fault detector can also comprise:
Alarm unit when being used for the fault current on detecting described branched line, sends alerting signal.
Alarm unit can be so that the field staff finds faulty line fast, and preferably, alerting signal can be audio alert signal or photoelectric alarm signal etc.
The invention also discloses a kind of electric network fault localization method, be used for the described electric network fault locating device of above-described embodiment, as shown in Figure 5, comprising:
S501: when described fault detector detects default fault current on the described branched line, send fault-signal;
S502: described communication terminal receives the fault-signal that described fault detector sends, and described fault-signal is sent;
S503: described localization of fault module is according to described fault-signal, localization of faults position.
The described electric network fault localization method of present embodiment can be realized the location quick and precisely of fault in the electrical network, and does not need the access of manpower, has guaranteed the stability of mains supply.
Each embodiment adopts the mode of going forward one by one to describe in this instructions, and what each embodiment stressed is and the difference of other embodiment that same or similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments herein.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.

Claims (10)

1. an electric network fault positioning system is characterized in that, comprising:
Be arranged on the branched line of described electrical network, during default fault current on detecting described branched line, send the fault detector of the fault-signal that comprises described branched line information;
Link to each other with described fault detector, receive the fault-signal that described fault detector sends, and the communication terminal that described fault-signal is sent;
Receive described fault-signal, and according to described fault-signal, the localization of fault module of localization of faults position.
2. system according to claim 1 is characterized in that, described fault detector comprises:
Detect first detecting unit whether default short-circuit current is arranged on the described branched line;
When detecting default short-circuit current, send first transmitter unit of described fault-signal.
3. system according to claim 2 is characterized in that, described default short-circuit current comprises:
In the default time, increase to default peak value and by the electric current of described default peak value vanishing by initial value.
4. system according to claim 1 is characterized in that, described fault detector comprises:
The signal source of emission single-phase earth fault current sequence on the described branched line;
Detect second detecting unit whether described single-phase earth fault current sequence is arranged on the described branched line;
When detecting described single-phase earth fault current, send second transmitter unit of described fault-signal.
5. according to each described system of claim 1 to 3, it is characterized in that described fault detector also comprises:
During fault current on detecting described branched line, send the alarm unit of alerting signal.
6. system according to claim 1 is characterized in that, described localization of fault module comprises:
Receive the receiving element of described fault-signal;
The geographic information database of the geographical location information that storage is default;
According to described fault-signal and geographic information database, determine the position determination unit in the geographic position of described trouble spot.
7. according to claim 1 or 6 described systems, it is characterized in that, also comprise:
The position of described trouble spot is sent to the position of failure point transmitting element of default terminal.
8. according to each described system of claim 1 to 6, it is characterized in that, also comprise:
The display unit that the position of described trouble spot is shown.
9. according to each described system of claim 1 to 6, it is characterized in that, also comprise:
Store the stored data base of the position of described trouble spot.
10. an electric network fault localization method is characterized in that, is used for the system as claimed in claim 1, comprising:
When described fault detector detects default fault current on the described branched line, send the fault-signal that comprises described branched line information;
Described communication terminal receives the fault-signal that described fault detector sends, and described fault-signal is sent;
Described localization of fault module receives described fault-signal, and according to described fault-signal, localization of faults position.
CN2012100626942A 2012-03-09 2012-03-09 Power grid fault positioning system Pending CN103308820A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104330686A (en) * 2014-11-20 2015-02-04 国家电网公司 System for detecting power supply circuit fault
CN104991167A (en) * 2015-07-31 2015-10-21 贵阳供电局 Power line fault positioning system and method thereof based on over-voltage online monitoring
CN105025107A (en) * 2015-07-28 2015-11-04 国网北京市电力公司 Power failure information processing method, client and server
CN107843804A (en) * 2017-10-19 2018-03-27 成都汉度科技有限公司 Method based on FTU and that fault detector realizes fault location

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CN201788253U (en) * 2010-08-19 2011-04-06 河南省电力公司郑州供电公司 Fault location system for distribution lines
CN102116823A (en) * 2011-02-17 2011-07-06 长春吉致科技发展有限公司 System for automatically judging and positioning faults of automatic blocking and continuous railway power lines in railway distribution network
CN202631677U (en) * 2012-03-09 2012-12-26 建德市供电局 Electrical network fault locating system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080284447A1 (en) * 2007-05-18 2008-11-20 Abb Technology Ag Method for determining location of phase-to earth fault
CN201281743Y (en) * 2008-09-01 2009-07-29 江苏银网电气股份有限公司 System for monitoring network distribution line fault
CN201535811U (en) * 2009-09-30 2010-07-28 泉州科力电气有限公司 FL system of electric distribution network based on wireless communication
CN201788253U (en) * 2010-08-19 2011-04-06 河南省电力公司郑州供电公司 Fault location system for distribution lines
CN102116823A (en) * 2011-02-17 2011-07-06 长春吉致科技发展有限公司 System for automatically judging and positioning faults of automatic blocking and continuous railway power lines in railway distribution network
CN202631677U (en) * 2012-03-09 2012-12-26 建德市供电局 Electrical network fault locating system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104330686A (en) * 2014-11-20 2015-02-04 国家电网公司 System for detecting power supply circuit fault
CN105025107A (en) * 2015-07-28 2015-11-04 国网北京市电力公司 Power failure information processing method, client and server
CN104991167A (en) * 2015-07-31 2015-10-21 贵阳供电局 Power line fault positioning system and method thereof based on over-voltage online monitoring
CN104991167B (en) * 2015-07-31 2018-03-23 贵阳供电局 A kind of fault positioning system of power line and method based on overvoltage on-line monitoring
CN107843804A (en) * 2017-10-19 2018-03-27 成都汉度科技有限公司 Method based on FTU and that fault detector realizes fault location

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Application publication date: 20130918