CN102435909A - Distribution network fault location detecting system - Google Patents

Distribution network fault location detecting system Download PDF

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Publication number
CN102435909A
CN102435909A CN2011102683061A CN201110268306A CN102435909A CN 102435909 A CN102435909 A CN 102435909A CN 2011102683061 A CN2011102683061 A CN 2011102683061A CN 201110268306 A CN201110268306 A CN 201110268306A CN 102435909 A CN102435909 A CN 102435909A
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CN
China
Prior art keywords
distribution network
fault
flashing light
board turning
sends
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Pending
Application number
CN2011102683061A
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Chinese (zh)
Inventor
许云峰
陈晓明
许光
杨志杰
何希顺
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BEIJIGN TIANLI JIBAO AUTOMATION TECHNOLOGY Co Ltd
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BEIJIGN TIANLI JIBAO AUTOMATION TECHNOLOGY Co Ltd
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Priority to CN2011102683061A priority Critical patent/CN102435909A/en
Publication of CN102435909A publication Critical patent/CN102435909A/en
Pending legal-status Critical Current

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Abstract

The embodiment of the invention discloses a distribution network fault location detecting system, which comprises a signal source, fault detection devices and a monitoring device, wherein the signal source is used for generating a specific frequency modulation signal (known as a special current signal) with the frequency different from the frequency of a current signal existing in a distribution network, and injecting the signal into a distribution network bus; a plurality of groups of fault detection devices are arranged on each outgoing line of the distribution network at certain intervals; each group is provided with three fault detection devices which are correspondingly arranged on an A phase, a B phase and a C phase of each outgoing line; whether an earth fault happens or not is judged through detecting whether the special current signal flows through the own line, and when the fault is detected, related fault information containing fault position information is sent to a data transmitting station through a wireless network, and is then transmitted to the monitoring device through the data transmitting station; and the monitoring device is used for confirming the distribution network fault location according to the related fault information transmitted by the data transmitting station. The system has higher accuracy rate of fault detection, and simultaneously, the distribution network fault location can be accurately confirmed.

Description

A kind of distribution network failure position detecting system
Technical field
The present invention relates to the fault detection technique field, particularly a kind of distribution network failure position detecting system.
Background technology
At present, it is the neutral non-effective grounding mode that China 3KV-66KV power distribution network adopts the small current neutral grounding mode mostly, comprises isolated neutral system and the neutral point earthed system through high resistant or arc suppression coil.The construction of power distribution network does not for a long time obtain due attention; The construction fund shortage, Technical properties of plant falls behind, and fault frequently takes place; People's lives and development of economic construction have been had a strong impact on; Thereby be badly in need of a kind of technology that can detect distribution network failure, with timely discovery with fix a breakdown, avoid the generation of major accident.
The fault detect of power distribution network mainly divides two aspects, and one of which is detecting of fault, and it two is that location of fault detects;
Generation for fault detects problem; The variation of the power distribution network parameter before and after existing its principle of distribution network failure pick-up unit mainly relies on and breaks down; In view of the own characteristic of small current neutral grounding system, when breaking down, when for example earth fault appears in overhead transmission line; The fault-signal that is produced (being generally the ANOMALOUS VARIATIONS of voltage on the pole line, current parameters) is faint especially; And receive influence factors such as electromagnetic interference (EMI) harmonic pollution, cause the fault-signal distortion, directly influenced the accuracy rate of fault detect.Existing in addition failure detector need be set the actuation of an alarm threshold value; This threshold value is the key that fault is judged; But since the complicacy of distribution net work structure, the polytrope of the method for operation, and it is concrete definite that this threshold value is difficult in practical application; Generally can only rely on people's experience to set, remote effect the accuracy rate of fault detect.
Therefore above two influence factors cause detection accuracy rate, the reliability of existing distribution network failure pick-up unit not high, often have erroneous judgement to take place.
In addition, for this problem of position probing of concrete trouble spot on the power distribution network circuit, prior art then never has good solution.In each transformer station failure detector is installed all in the existing power distribution network, but passes through the warning of this failure detector, people can only know which bar circuit is fault occur on; And the particular location that takes place on the On-line Fault road; Then all be after detecting the fault generation, search to confirm to circuit through manual work, and the power distribution network circuit be very long; The scope that manual work is searched is very big; Often need just can find concrete abort situation for a long time, the detection mode that abort situation is searched in this manual work has seriously restricted distribution network automated development, becomes the bottleneck that distribution network failure is got rid of fast.
Summary of the invention
In view of this, the invention provides a kind of distribution network failure position detecting system, when having very high fault detect accuracy rate, can also confirm the distribution network failure position exactly.
For reaching above-mentioned purpose, technical scheme of the present invention specifically is achieved in that
A kind of distribution network failure position detecting system, this system comprises:
Signal source is used for producing the CF modulation signal that a frequency is different from the current signal frequency that power distribution network exists, and is called the specific current signal, and injects the power distribution network bus;
Failure detector is installed many groups at certain intervals in every outlet of power distribution network; Every group three, correspondence is installed on the A, B, C three-phase of outlet; Belong on the circuit through detecting self whether said specific current signal flow mistake is arranged, judge whether earth fault takes place, and when detecting fault, the dependent failure information that will comprise abort situation information sends to the data forwarding station through wireless network;
The data forwarding station is used to receive the dependent failure information that said failure detector sends, and is forwarded to supervising device;
Supervising device is used for the dependent failure information according to the transmission of said data forwarding station, confirms the distribution network failure position.
Preferably, said failure detector has said specific current signal flow out-of-date on the circuit detecting self place, and judging has earth fault to take place.
Preferably, said failure detector when detecting earth fault, further sends the onsite alarming information of board turning form and/or flashing light form said.
Preferably, said fault relevant information further comprises: the temporal information that fault takes place.
Preferably, said failure detector comprises:
Detection module is used to detect the said specific current signal that injects the power distribution network bus in advance, and detected specific current signal is sent to the single-chip microcomputer processing;
Single-chip microcomputer through judging whether to receive the specific current signal that said detection module sends, judges whether power distribution network has earth fault to take place; When judgement had fault to take place, the dependent failure information that will comprise abort situation information sent to wireless communication module;
Wireless communication module sends to the data forwarding station with said fault dependent failure information through wireless network.
Preferably, said failure detector further comprises:
The board turning operational module is used for when receiving the board turning operational order that said single-chip microcomputer sends, sending the onsite alarming information of board turning form;
Said single-chip microcomputer further when judgement has fault to take place, sends the board turning operational order to said board turning operational module.
Preferably, said board turning operational module comprises: board turning driving, involution driving, direct current generator and display body;
Said board turning drives, and when receiving the board turning operational order that said single-chip microcomputer sends, makes on the said direct current generator through the forward current of short time, to drive said display body rotation, realizes the board turning action;
Said involution drives, and when reaching preset fault reset time, when perhaps receiving the involution operational order that said single-chip microcomputer sends, makes on the said direct current generator through the inverse current of short time, to drive said display body revolution, realizes the involution action of board turning.
Preferably, said failure detector further comprises:
The flashing light module is used for when receiving the flashing light operational order that said single-chip microcomputer sends, sending the onsite alarming information of flashing light form;
Said single-chip microcomputer further when judgement has fault to take place, sends the flashing light operational order to said flashing light module.
Preferably, said flashing light module comprises: flashing light drives, LED lamp and photoelectric tube;
Said flashing light drives, and when receiving the flashing light operational order that said single-chip microcomputer sends, according to the ambient bright degree that said photocell detection arrives, controls the flashing light action of said LED lamp.
Visible by technique scheme, this distribution network failure position detecting system of the present invention with the signal specific that the adds basis for estimation as fault detect, need not artificially be set the action threshold value, does not rely on people's experience, can reach very high detection accuracy rate; Simultaneously after failure detector detects distribution network failure; Can quickly and accurately dependent failure information such as abort situation be sent to the control center that supervising device is installed through wireless network; Thereby help the maintenance personal to confirm abort situation, and rush towards the scene rapidly, fix a breakdown; Recover normal power supply, improved power supply reliability greatly.
Description of drawings
Fig. 1 is the distribution network failure position detecting system structural representation of the embodiment of the invention.
Fig. 2 is the failure detector structural representation of the embodiment of the invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, to further explain of the present invention.
Failure detector in the distribution network failure position detecting system of the present invention with the signal specific that the adds basis for estimation as fault detect, need not artificially be set the action threshold value, does not rely on people's experience, can reach very high detection accuracy rate; Simultaneously after detecting distribution network failure; Can the position of fault generation and the time of fault generation dependent failure information such as (temporal information that fault takes place are also nonessential) be sent to the control center that supervising device is installed through wireless network, organize failure detectors more through in every outlet of power distribution network, installing at certain intervals; Every group three, respectively corresponding (one of every phase) is installed on the A, B, C three-phase of outlet; The staff who makes in control center can know the particular location that fault takes place rapidly and accurately, thereby can arrive the position of fault fast, fixes a breakdown.
Abort situation detection system of the present invention is as shown in Figure 1, consists of the following components: signal source 101, failure detector 102, data forwarding station 103, supervising device 104.
Signal source 101 is used to produce a specific current signal and injects power distribution network bus primary side; (so-called specific current signal; Being the CF modulation signal that frequency is different from the current signal frequency that exists in the power distribution network) this signal both can be through the voltage transformer secondary side input; Be coupled to power distribution network bus primary side, also can directly be injected into power distribution network bus primary side, when earth fault takes place through other utility appliance; This specific current signal will flow to ground path from bus, flow into earth point at last; The circuit that earth fault promptly takes place has this signal flow mistake, and the circuit of non-earth fault does not have this specific current signal flow mistake, so failure detector can be according to this distinctive signal having or not in the power distribution network circuit, as the basis for estimation of earth fault.
Failure detector 102 is installed many groups at certain intervals in every outlet of power distribution network, every group comprises 3, realizes the fault detect to A, B, C three-phase line in the power distribution network outlet respectively, preserves the positional information of himself in each failure detector.Specific current signal through detecting said signal source generation judges whether earth fault takes place; Near and the data forwarding station 103 the time of breaking down and the dependent failure information such as position of self sent to through wireless network (like existing radio frequency communication, perhaps self-built wireless network all can); Simultaneously can also further self send the onsite alarming information, like flashing light, board turning etc., prompting is rushed for on-the-spot staff and is found failure detector 102 rapidly.
Failure detector 102 is through detecting the detection that above-mentioned distinctive signal is grounded fault; And this detection mode need not confirmed a detection threshold through people's experience; Only need the specific current signal of injection different, and failure detector is as long as detect this specific current signal with the frequency of the normal current signal of first wife's power network line; Therefore people's experience can be do not relied on, testing result very accurately can be obtained.
The positional information of each failure detector 102 self can be kept in the failure detector in advance; For example failure detector 102 is installed on the A phase cable of outlet k among Fig. 1; Be first failure detector that generatrix direction is installed, so its positional information can be represented with kla.
Data forwarding station 103; Be used to receive dependent failure information such as temporal information that fault that failure detector 102 sends takes place and positional information and be forwarded to supervising device 104; In system; Data forwarding station 103 can have a plurality of; Simultaneously the data forwarding of 3 even more failure detector 102 can be realized in each data forwarding station, data repeater station 103 of every group of failure detector 102 configurations for example, and the data that failure detector 102 sends can be transmitted through the data forwarding station nearest with it 103.
Supervising device 104 can be installed in transformer station or the power supply administration, can gather the temporal information and the positional information of the fault generation of transmitting at each data forwarding station 103 through any communication mode; Through topological analysis and calculating, find out abort situation and faulty line again, be presented on the power distribution network topological diagram, and can the corresponding failure message of recording storage.
Wherein, failure detector 102 is as shown in Figure 2, as basic embodiment, can be made up of detection module 201, single-chip microcomputer 202 and wireless communication module 203.
Detection module 201 is used to detect the specific current signal that injects the power distribution network bus in advance, and detected specific current signal is sent to single-chip microcomputer 202 processing; Wherein, said specific current signal is the CF modulation signal that frequency is different from the current signal frequency that exists in the power distribution network; Particularly; Its detection for the specific current signal can realize through the signal receiving antenna for this specific current Design of Signal; This receiving antenna carries out this modulation signal sending to single-chip microcomputer 202 processing after the processing such as frequency-selecting amplification, filtering from the modulation signal of circuit reception CF again.
Single-chip microcomputer 202 through judging whether to receive the specific current signal that said detection module 201 sends, judges whether power distribution network has earth fault to take place; When judgement had fault to take place, the dependent failure information that will comprise abort situation information sent to wireless communication module 203;
Wireless communication module 203 sends to the data forwarding station with said fault dependent failure information through wireless network.
Wherein, as preferred embodiment, this failure detector 102 can further include:
Board turning operational module 204 is used for when receiving the board turning operational order that said single-chip microcomputer 202 sends, sending the onsite alarming information of board turning form;
Said single-chip microcomputer 202 further when judgement has fault to take place, sends the board turning operational order to said board turning operational module 204.
As another preferred embodiment, this failure detector 102 can further include:
Flashing light module 205 is used for when receiving the flashing light operational order that said single-chip microcomputer 202 sends, sending the onsite alarming information of flashing light form;
Said single-chip microcomputer 202 further when judgement has fault to take place, sends the flashing light operational order to said flashing light module 205.
One of can comprise in above-mentioned board turning operational module 204 and the flashing light module 205 also can comprise failure detector 102.The board turning action of board turning operational module 204 and the flashing light action of flashing light module 205 can be used as field alert information, help the repairing personnel that get into fault in-situ to find this to detect the position of the failure detector of fault rapidly.
As preferred embodiment, board turning operational module 204 can comprise specifically that board turning drives 206, and involution drives 207, direct current generator 208 and display body 209; When breaking down; Single-chip microcomputer 202 can drive 206 to board turning and send the board turning operational order; Board turning drives 206 and makes on the direct current generator 208 through the forward current of short time, and this electric current is enough to magnetize the soft magnet in the direct current generator 208, make on its polarity and the display body 209 permanent magnet in the same way; To drive display body 209 rotations, realize the board turning action; When reaching preset fault reset time, perhaps receive the involution operational order that single-chip microcomputer 202 sends after, involution drives 208 inverse currents that make on the direct current generator 208 through the short time; This electric current is used for magnetizing the soft magnet of direct current generator 208; Make the permanent magnet on its polarity and the display body 209 reverse,, realize the involution action of board turning to drive display body 209 revolutions; Wherein, display body 209 can be the red fluorescence board.
Flashing light module 204; Can comprise that flashing light drives 210; Light emitting diode (LED) lamp 211 and photoelectric tube 212, after detecting fault, single-chip microcomputer 202 will drive 210 to flashing light and send the flashing light instruction; Flashing light drives 210 according to photoelectric tube 212 detected ambient bright degree, the flashing light action of control LED lamp 211; For example, ambient light is darker, and during like night, control LED lamp 211 carries out the flashing light action, if ambient light is stronger, during like daytime, does not then carry out the flashing light action.
Visible by the above embodiments, this distribution network failure position detecting system of the present invention is after failure detector detects distribution network failure; Can be quickly and accurately with location of fault information, fault-time dependent failure information such as information be sent to control center through wireless network; Thereby help the maintenance personal to confirm abort situation, and rush towards the scene rapidly, fix a breakdown; Recover normal power supply, improved power supply reliability greatly.And need can not reach very high detection accuracy rate to the dependence of people's experience, greatly improved distribution network automated level.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope that the present invention protects.

Claims (9)

1. a distribution network failure position detecting system is characterized in that, this system comprises:
Signal source is used for producing the CF modulation signal that a frequency is different from the current signal frequency that power distribution network exists, and is called the specific current signal, and injects the power distribution network bus;
Failure detector is installed many groups at certain intervals in every outlet of power distribution network; Every group three, correspondence is installed on the A, B, C three-phase of outlet; Belong on the circuit through detecting self whether said specific current signal flow mistake is arranged, judge whether earth fault takes place, and when detecting fault, the dependent failure information that will comprise abort situation information sends to the data forwarding station through wireless network;
The data forwarding station is used to receive the dependent failure information that said failure detector sends, and is forwarded to supervising device;
Supervising device is used for the dependent failure information according to the transmission of said data forwarding station, confirms the distribution network failure position.
2. distribution network failure position detecting system as claimed in claim 1 is characterized in that, said failure detector has said specific current signal flow out-of-date on the circuit detecting self place, and judging has earth fault to take place.
3. according to claim 1 or claim 2 distribution network failure position detecting system is characterized in that said failure detector further sends the onsite alarming information of board turning form and/or flashing light form when detecting earth fault.
4. according to claim 1 or claim 2 distribution network failure position detecting system is characterized in that said dependent failure information further comprises: the temporal information that fault takes place.
5. according to claim 1 or claim 2 distribution network failure position detecting system is characterized in that said failure detector comprises:
Detection module is used to detect the said specific current signal that injects the power distribution network bus in advance, and detected specific current signal is sent to the single-chip microcomputer processing;
Single-chip microcomputer through judging whether to receive the specific current signal that said detection module sends, judges whether power distribution network has earth fault to take place; When judgement had fault to take place, the dependent failure information that will comprise abort situation information sent to wireless communication module;
Wireless communication module sends to the data forwarding station with said fault dependent failure information through wireless network.
6. distribution network failure position detecting system as claimed in claim 5 is characterized in that, said failure detector further comprises:
The board turning operational module is used for when receiving the board turning operational order that said single-chip microcomputer sends, sending the onsite alarming information of board turning form;
Said single-chip microcomputer further when judgement has fault to take place, sends the board turning operational order to said board turning operational module.
7. distribution network failure position detecting system as claimed in claim 6 is characterized in that, said board turning operational module comprises: board turning driving, involution driving, direct current generator and display body;
Said board turning drives, and when receiving the board turning operational order that said single-chip microcomputer sends, makes on the said direct current generator through the forward current of short time, to drive said display body rotation, realizes the board turning action;
Said involution drives, and when reaching preset fault reset time, when perhaps receiving the involution operational order that said single-chip microcomputer sends, makes on the said direct current generator through the inverse current of short time, to drive said display body revolution, realizes the involution action of board turning.
8. distribution network failure position detecting system as claimed in claim 5 is characterized in that, said failure detector further comprises:
The flashing light module is used for when receiving the flashing light operational order that said single-chip microcomputer sends, sending the onsite alarming information of flashing light form;
Said single-chip microcomputer further when judgement has fault to take place, sends the flashing light operational order to said flashing light module.
9. distribution network failure position detecting system as claimed in claim 8 is characterized in that, said flashing light module comprises: flashing light drives, LED lamp and photoelectric tube;
Said flashing light drives, and when receiving the flashing light operational order that said single-chip microcomputer sends, according to the ambient bright degree that said photocell detection arrives, controls the flashing light action of said LED lamp.
CN2011102683061A 2011-09-09 2011-09-09 Distribution network fault location detecting system Pending CN102435909A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103916038A (en) * 2014-04-11 2014-07-09 河北先控捷联电源设备有限公司 Short-circuit fault processing method for three-level inverter parallel system
CN104620119A (en) * 2012-06-28 2015-05-13 雷比诺电力系统 Device and method for monitoring an electrical network
CN104730413A (en) * 2014-12-11 2015-06-24 广西星宇智能电气有限公司 Power distribution network line single-phase grounding distribution type positioning method and system thereof
CN106375113A (en) * 2016-08-25 2017-02-01 杭州华三通信技术有限公司 Method, device and system for recording distributed equipment failure
CN108693443A (en) * 2018-05-23 2018-10-23 安徽国电京润电力科技有限公司 A kind of distribution network voltage fluctuation precise positioning system and localization method
CN109658656A (en) * 2019-01-07 2019-04-19 赣州市金电电子设备有限公司 A kind of 24 hours online theft preventing methods of road lighting cable using N weeks variable current
CN111458590A (en) * 2020-04-21 2020-07-28 国网北京市电力公司 Fault detection system of power distribution network

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CN1207500A (en) * 1998-08-26 1999-02-10 北京英康通用电力技术有限公司 Method and system for detecting failure in distribution network
CN102043113A (en) * 2009-10-22 2011-05-04 上海思南电力通信有限公司 Method for locating single phase ground fault locating system

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CN1207500A (en) * 1998-08-26 1999-02-10 北京英康通用电力技术有限公司 Method and system for detecting failure in distribution network
CN102043113A (en) * 2009-10-22 2011-05-04 上海思南电力通信有限公司 Method for locating single phase ground fault locating system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104620119A (en) * 2012-06-28 2015-05-13 雷比诺电力系统 Device and method for monitoring an electrical network
CN104620119B (en) * 2012-06-28 2018-02-09 雷比诺电力系统 The apparatus and method for monitoring power network
CN103916038A (en) * 2014-04-11 2014-07-09 河北先控捷联电源设备有限公司 Short-circuit fault processing method for three-level inverter parallel system
CN103916038B (en) * 2014-04-11 2016-08-31 先控捷联电气股份有限公司 The short trouble processing method of three-level inverter parallel system
CN104730413A (en) * 2014-12-11 2015-06-24 广西星宇智能电气有限公司 Power distribution network line single-phase grounding distribution type positioning method and system thereof
CN106375113A (en) * 2016-08-25 2017-02-01 杭州华三通信技术有限公司 Method, device and system for recording distributed equipment failure
CN106375113B (en) * 2016-08-25 2020-01-17 新华三技术有限公司 Method, device and system for recording faults of distributed equipment
CN108693443A (en) * 2018-05-23 2018-10-23 安徽国电京润电力科技有限公司 A kind of distribution network voltage fluctuation precise positioning system and localization method
CN109658656A (en) * 2019-01-07 2019-04-19 赣州市金电电子设备有限公司 A kind of 24 hours online theft preventing methods of road lighting cable using N weeks variable current
CN111458590A (en) * 2020-04-21 2020-07-28 国网北京市电力公司 Fault detection system of power distribution network

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Application publication date: 20120502