CN102749553A - Automatic positioning device for grounding failure of power transmission line - Google Patents
Automatic positioning device for grounding failure of power transmission line Download PDFInfo
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- CN102749553A CN102749553A CN2011101019872A CN201110101987A CN102749553A CN 102749553 A CN102749553 A CN 102749553A CN 2011101019872 A CN2011101019872 A CN 2011101019872A CN 201110101987 A CN201110101987 A CN 201110101987A CN 102749553 A CN102749553 A CN 102749553A
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- transmission line
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- automatic positioning
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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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Abstract
The invention relates to an automatic positioning device for grounding failure of a power transmission line. The power transmission line is connected with the outgoing wire side of a main transformer of a substation, respectively consists of a three-phase bus and is respectively provided with a plurality of nodes. The positioning device comprises a signal source device connected with the bus side of the main transformer, a plurality of failure displays respectively connected with each phase bus at each node of each power transmission line in a hanging way, a plurality of overhead sub-stations respectively arranged at each node of each power transmission line, and an information processing center system. By adopting the automatic positioning device, operators can promptly and accurately know the safety situation of power transmission lines, the repair time can be saved, the working efficiency can be increased, and the economic losses and social effects caused by line failure can be reduced greatly.
Description
Technical field
The present invention relates to a kind of transmission lines earth fault automatic positioning equipment.
Background technology
As everyone knows, because the influence of disaster or other factors, transmission line of electricity suffers damage unavoidably and earth fault occurs, on middle and high pressure overhead transmission line, earth fault occurs especially easily, and wherein modal fault is the overhead transmission line single-phase earthing.For this type of fault, the maintainer generally is the position of distinguishing the earth point of earth fault through the voltage of detection line; When seeking earth point, can arrange personnel to check along the line for short overhead transmission line comprehensively; But when seeking earth point for long overhead transmission line, should adopt optimum seeking method to carry out, promptly at first the strain insulator bar at 1/2 place of line length carries out segmentation; Take the drainage thread of circuit three-phase respectively apart; Make whole circuit be divided into two sections, measure the insulation resistance of three-phase conducting wire then with the 2500V megohmmeter respectively, can distinguish certain section ground connection or two sections equal ground connection of circuit according to measurement result; Secondly continue segment lookup according to judged result; Progressively dwindle seek scope, treat that the ground connection scope narrows down to a certain degree, can arrange personnel to check along the line comprehensively.
Yet no matter above-mentioned is comprehensive inspection technique, or optimum seeking method, all needs the time and efforts of maintainer's labor, and work efficiency is extremely low.Therefore, press for a kind of automatic trouble locating arrangement of development now to address the above problem.
Summary of the invention
In order to solve the problem that above-mentioned prior art exists, the present invention aims to provide a kind of transmission lines earth fault automatic positioning equipment, to realize effectively reducing the positioning time of transmission lines earth fault point, improves the purpose of maintainer's work efficiency greatly.
A kind of transmission lines earth fault automatic positioning equipment of the present invention; Said transmission line of electricity is connected transforming plant main transformer depressor outlet side; Every transmission line of electricity is made up of the three-phase bus; And every transmission line of electricity is provided with plurality of nodes; Said locating device comprises that one is connected the signal source equipment of said main-transformer bus bar side; Several are articulated in the fault detector on every phase bus at each node place of said every transmission line of electricity respectively; Several are separately positioned on the built on stilts substation and a system of information processing centre at each node place of said every transmission line of electricity
Said signal source equipment comprises that a resistance box, is connected the controller that said main-transformer bus neutral point and voltage sensor and between the ground are connected with this voltage sensor; Wherein, Said resistance box comprises a switch and several high-tension resistives that is connected on successively between said main-transformer bus neutral point and the ground; And this switch receives a control signal of said controller output, and exports a pulsating current signal;
Said each fault detector comprise one be used to receive said pulsating current signal the antenna communication device that is connected with this detection control module of the detection control module and that is connected with this electromagnetic induction device of electromagnetic induction device;
The GPRS module that said built on stilts substation comprises a main control unit, be connected with this main control unit respectively and an accumulator and the solar cell interface and the solar storage battery plate that are connected successively with this accumulator; Wherein, Said main control unit is connected with the communication of said antenna communication device through a radio antenna, and said GPRS module is passed through a GPRS antenna and is connected with said information processing centre system communication.
In above-mentioned transmission lines earth fault automatic positioning equipment, said main control unit is connected with the wireless telecommunications of antenna communication device; Said GPRS module is connected with the GSM of system of information processing centre communication.
In above-mentioned transmission lines earth fault automatic positioning equipment, said resistance box also comprises the casing that is used to be provided with said switch and several high-tension resistives.
In above-mentioned transmission lines earth fault automatic positioning equipment, said built on stilts substation also comprises the cabinet that is used to be provided with said main control unit, GPRS module, accumulator and solar cell interface.
Owing to adopted above-mentioned technical solution; The present invention is through being arranged on its neutral point offset voltage of signal source equipment induction of transforming plant main transformer depressor bus bar side; And feed back a pulsating current signal to bus bar side; Through being arranged on this pulsating current signal of fault detector induction of transforming plant main transformer depressor outlet side,, through built on stilts substation detected failure message is sent to operations staff's mobile phone or watch-dog at last via the system of information processing centre then to realize detection and location to faulty line; Thereby make the operations staff can grasp the security situation of transmission line of electricity in time, exactly; Save the repairing time, increase work efficiency, greatly reduce economic loss and social influence that line fault is brought.
Description of drawings
Fig. 1 is the fundamental diagram of a kind of transmission lines earth fault automatic positioning equipment of the present invention;
Fig. 2 is the scheme of installation of signal source equipment in a kind of transmission lines earth fault automatic positioning equipment of the present invention;
Fig. 3 is the structural representation of the resistance box of signal source equipment in a kind of transmission lines earth fault automatic positioning equipment of the present invention;
Fig. 4 is the structural representation of fault detector in a kind of transmission lines earth fault automatic positioning equipment of the present invention;
Fig. 5 is the structural representation of built on stilts substation in a kind of transmission lines earth fault automatic positioning equipment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, specific embodiment of the present invention is elaborated.
See also Fig. 1 to Fig. 5, transmission line of electricity 6 is connected transforming plant main transformer depressor 5 outlet sides, and every transmission line of electricity 6 is made up of the three-phase bus, and every transmission line of electricity 6 is provided with plurality of nodes.The present invention; Be a kind of transmission lines earth fault automatic positioning equipment, comprise one be connected main-transformer 5 bus bar side every phase bus at signal source equipment 1, several each node places that is articulated in every transmission line of electricity 6 respectively on fault detector 2, the built on stilts substation 3 and a system of information processing centre 4 at several each node places that is separately positioned on every transmission line of electricity 6.
Signal source equipment 1 comprises that a resistance box 11, is connected the controller 13 that main-transformer 5 bus neutral points 50 and voltage sensor 12 and between the ground are connected with voltage sensor 12; Wherein, Resistance box 11 comprises a casing 113, be arranged in the casing 113 and the switch 111 and several high-tension resistives 112 and that are connected on successively between main-transformer 5 bus neutral points 50 and the ground are arranged on the protective earthing device 114 in the casing 113; And switch 111 receives a control signal of controller 13 outputs, and exports a pulsating current signal.
Each fault detector 2 comprise one be used to receive the pulsating current signal the detection control module 22 that is connected with electromagnetic induction device 21 of electromagnetic induction device 21, one and one with detect the antenna communication device 23 that control module 22 is connected.
The cabinet 38 that the GPRS module 32 that built on stilts substation 3 comprises a main control unit 31, be connected with main control unit 31 respectively and an accumulator 33 and a solar cell interface 34 that is connected successively with accumulator 33, a solar storage battery plate 35 and are used to be provided with main control unit 31, GPRS module 32, accumulator 33 and solar cell interface 34; Wherein, Main control unit 31 is connected with 23 wireless telecommunications of antenna communication device through a radio antenna 36; Be that main control unit 31 is exported a wifi wireless signal through radio antenna 36 to antenna communication device 23; GPRS module 32 is connected with the 4GSM of system of information processing centre communication through a GPRS antenna 37, and promptly GPRS module 32 is exported a GSM signal through GPRS antenna 37 to system of information processing centre 4.
Be example with a three phase line 6 below, following to principle of work of the present invention:
When a singlephase earth fault appears in transmission line of electricity 6; Offset voltage can appear in main-transformer 5 bus neutral points 50; When controller 13 detects this offset voltage greater than a setting value (this setting value is preset in controller 13 inside) through voltage sensor 12; And after having kept the regular hour, then controller 13 drops into resistance box 11 according to offset voltage; Send to switch 111 close, the separating brake control signal; Thereby make main-transformer 5 bus neutral points 50 wave band property ground insert a middle resistance in short-term, and make switch 111 in a period of time under the effect of residual voltage, can be to the bigger pulsating current signal (i.e. a group coding ground current pulse) of main-transformer 5 bus bar side feedback one; The size of current impulse depends on the stake resistance of bus neutral point 50 neutral points; Be the number (number of present embodiment mesohigh resistance 112 is 4) and the resistance of high-tension resistive 112; If it is too low that resistance is got, ground current will be bigger, and the interference to communication line will be bigger thus; Too big, can have influence on reliability of operation again but if resistance is got.Therefore, the expection of ground current size is depended in the selection of the size of resistance, and the big I of ground current decides in the ratio of transmission line of electricity 6 contained cables; Generally speaking, when transmission line of electricity 6 contained cable ratio＜80%, ground current was 100～200A, and then total resistance of high-tension resistive 112 should be 28.80～57.74 Ω; When transmission line of electricity 6 contained cable ratio >=80%, ground current was 500～600A, and then total resistance of high-tension resistive 112 should be 7.2～14.4 Ω; In addition, in the resistance box 11 except high-tension resistive 112 ground connection to form the loop, it is charged to prevent metal cabinet 113 also to be provided with protective earthing device 114, avoids causing casualty accident.
Though above-mentioned pulsating current signal can be passed to every phase bus of transmission line of electricity 6 via main-transformer 5; But because the loop only can form between the earth fault of transmission line of electricity 6 and the earth; Therefore; The fault detector 2 that only is articulated on the single-phase transmission line of electricity 6 that earth fault takes place just can detect this pulsating current signal, and is articulated in the fault detector 2 on other single-phase transmission line of electricity 6 that earth fault do not occur because do not form the loop, therefore can't detect this signal; Fault detector 2 is according to this principle of work; Can confirm that the single-phase bus of earth fault takes place transmission line of electricity 6; And, therefore, can accurately locate the concrete trouble spot of single-phase bus because each node place on every phase bus is equipped with fault detector 2.Fault detector 2 utilizes electromagnetic induction principle, and promptly electromagnetic induction device 21 detects the pulsating current signal on the transmission lines of electricity 6, and does not directly contact with core, thereby has avoided because of flowing through the phenomenon that big electric current is damaged; After detection control module 22 receives the fault-signal of electromagnetic induction device 21 outputs, carry out the processing of failure message, and trigger antenna communication device 23 and outwards export this location of fault information with wireless communication mode.
The communication signal that is arranged on the built on stilts substation 3 at transmission line of electricity 6 each node place can cover three fault detectors 2 at this node place; When main control unit 31 receives the failure message that the fault detector 2 on the fault phase line sends through radio antenna 36 after; Start 32 work of GPRS module, promptly send failure message to system of information processing centre 4 through GPRS antenna 37; Main control unit 31 is by accumulator 33 power supplies, and accumulator 33 charges by being located at cabinet 38 outer solar storage battery plates 35 through solar cell interface 34.
System of information processing centre 4 is according to the failure message that receives; The particular location that earth fault is taken place transmission line of electricity 6 is recorded in the system; And be sent to operations staff's mobile phone or watch-dog 7 with the note form; Thereby make the operations staff can grasp the security situation of transmission line of electricity in time, exactly, save the repairing time, increase work efficiency.
In the present embodiment, what signal source equipment 1 middle controller 13 adopted is that the model that Shanghai Fei Kete Electric Applicance Co., Ltd produces is the product of RC2000F.What fault detector 2 adopted is that the model that electricity (Beijing) Science and Technology Ltd. of light section far away produces is the product of GY-1PE-FG; Wherein, What electromagnetic induction device 21 adopted is the 16F630 chip that Microchip Technology produces, and what antenna communication device 23 adopted is TR24A type wireless communication module.What the GPRS module 32 in the built on stilts substation 3 adopted is that the model that Siemens Company produces is the GSM communication module of TC35i; The model that the Atmel Corporation that main control unit 31 adopts produces is that the single-chip microcomputer of 8 chips of Atmage32 is as processor; In addition; Accurate in order to ensure detected state low-power consumption and system time; Go back a clock module of separate configurations in the main control unit 31, the model that the adoptable PHILIPS Co. of this clock module produces is the clock chip of PCF8563, and what solar storage battery plate 35 adopted is the 10W single-crystalline-silicon solar-cell panel.What system of information processing centre 4 adopted is the pc machine that ATOM does not have the fan built-in industrial control machine and cooperates with it, thereby but has low-power consumption, stable and reliable operation, the strong unmanned of arithmetic capability, can prevent deadlock automatically and have advantages such as outstanding EMC Electromagnetic Compatibility and anti-electromagnetic interference capability.
More than combine accompanying drawing embodiment that the present invention is specified, those skilled in the art can make the many variations example to the present invention according to above-mentioned explanation.Thereby some details among the embodiment should not constitute qualification of the present invention, and the scope that the present invention will define with appended claims is as protection scope of the present invention.
Claims (4)
1. transmission lines earth fault automatic positioning equipment; Said transmission line of electricity is connected transforming plant main transformer depressor outlet side; Every transmission line of electricity is made up of the three-phase bus; And every transmission line of electricity is provided with plurality of nodes; It is characterized in that, said locating device comprise one be connected said main-transformer bus bar side every phase bus at signal source equipment, several each node places that is articulated in said every transmission line of electricity respectively on fault detector, the built on stilts substation and a system of information processing centre at each node place that several are separately positioned on said every transmission line of electricity
Said signal source equipment comprises that a resistance box, is connected the controller that said main-transformer bus neutral point and voltage sensor and between the ground are connected with this voltage sensor; Wherein, Said resistance box comprises a switch and several high-tension resistives that is connected on successively between said main-transformer bus neutral point and the ground; And this switch receives a control signal of said controller output, and exports a pulsating current signal;
Said each fault detector comprise one be used to receive said pulsating current signal the antenna communication device that is connected with this detection control module of the detection control module and that is connected with this electromagnetic induction device of electromagnetic induction device;
The GPRS module that said built on stilts substation comprises a main control unit, be connected with this main control unit respectively and an accumulator and the solar cell interface and the solar storage battery plate that are connected successively with this accumulator; Wherein, Said main control unit is connected with the communication of said antenna communication device through a radio antenna, and said GPRS module is passed through a GPRS antenna and is connected with said information processing centre system communication.
2. transmission lines earth fault automatic positioning equipment according to claim 1 is characterized in that, said main control unit is connected with the wireless telecommunications of antenna communication device; Said GPRS module is connected with the GSM of system of information processing centre communication.
3. transmission lines earth fault automatic positioning equipment according to claim 1 and 2 is characterized in that, said resistance box also comprises the casing that is used to be provided with said switch and several high-tension resistives.
4. transmission lines earth fault automatic positioning equipment according to claim 1 and 2 is characterized in that, said built on stilts substation also comprises the cabinet that is used to be provided with said main control unit, GPRS module, accumulator and solar cell interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011101019872A CN102749553A (en) | 2011-04-22 | 2011-04-22 | Automatic positioning device for grounding failure of power transmission line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101019872A CN102749553A (en) | 2011-04-22 | 2011-04-22 | Automatic positioning device for grounding failure of power transmission line |
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| CN102749553A true CN102749553A (en) | 2012-10-24 |
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| CN2011101019872A Pending CN102749553A (en) | 2011-04-22 | 2011-04-22 | Automatic positioning device for grounding failure of power transmission line |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974266A (en) * | 2016-05-27 | 2016-09-28 | 桂林赛普电子科技有限公司 | Fault positioning system and method for long distribution network line |
| CN107247217A (en) * | 2017-07-19 | 2017-10-13 | 云南电网有限责任公司电力科学研究院 | A kind of distribution network fault positioning device |
| CN109361199A (en) * | 2018-10-10 | 2019-02-19 | 国网浙江省电力有限公司台州供电公司 | The guard method of transition resistance ground fault on line is sent out for photovoltaic plant |
| CN110058125A (en) * | 2019-05-10 | 2019-07-26 | 云南电力技术有限责任公司 | A kind of method for locating single-phase ground fault and system |
| CN110609212A (en) * | 2019-09-26 | 2019-12-24 | 孙正武 | Overhead distribution line single-phase earth fault positioning method and system |
| CN106546825B (en) * | 2016-09-29 | 2022-07-01 | 北京国电光宇机电设备有限公司 | Intelligent wireless transmission micro-opening self-zero-drift correction microcomputer insulation comprehensive detection system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201173956Y (en) * | 2008-04-09 | 2008-12-31 | 中国石油化工股份有限公司胜利油田分公司临盘采油厂 | DC infusion type route selecting positioning system |
| CN100470252C (en) * | 2007-07-31 | 2009-03-18 | 长沙理工大学 | Electric network functional failure travelling wave positioning method |
| CN201359630Y (en) * | 2009-03-03 | 2009-12-09 | 济南大学 | DC injection-type line selection and positioning device adopting self-adapting adjustable resistor |
| CN201796108U (en) * | 2010-06-22 | 2011-04-13 | 山东电力研究院 | Single-phase grounding fault positioning system for distribution network of electric power system |
| CN202041612U (en) * | 2011-04-22 | 2011-11-16 | 上海市电力公司 | Automatic locating device for earth faults of electricity transmission lines |
-
2011
- 2011-04-22 CN CN2011101019872A patent/CN102749553A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100470252C (en) * | 2007-07-31 | 2009-03-18 | 长沙理工大学 | Electric network functional failure travelling wave positioning method |
| CN201173956Y (en) * | 2008-04-09 | 2008-12-31 | 中国石油化工股份有限公司胜利油田分公司临盘采油厂 | DC infusion type route selecting positioning system |
| CN201359630Y (en) * | 2009-03-03 | 2009-12-09 | 济南大学 | DC injection-type line selection and positioning device adopting self-adapting adjustable resistor |
| CN201796108U (en) * | 2010-06-22 | 2011-04-13 | 山东电力研究院 | Single-phase grounding fault positioning system for distribution network of electric power system |
| CN202041612U (en) * | 2011-04-22 | 2011-11-16 | 上海市电力公司 | Automatic locating device for earth faults of electricity transmission lines |
Non-Patent Citations (1)
| Title |
|---|
| 郑新才等: "多功能配电网故障指示器研制", 《制造业自动化》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974266A (en) * | 2016-05-27 | 2016-09-28 | 桂林赛普电子科技有限公司 | Fault positioning system and method for long distribution network line |
| CN106546825B (en) * | 2016-09-29 | 2022-07-01 | 北京国电光宇机电设备有限公司 | Intelligent wireless transmission micro-opening self-zero-drift correction microcomputer insulation comprehensive detection system |
| CN107247217A (en) * | 2017-07-19 | 2017-10-13 | 云南电网有限责任公司电力科学研究院 | A kind of distribution network fault positioning device |
| CN109361199A (en) * | 2018-10-10 | 2019-02-19 | 国网浙江省电力有限公司台州供电公司 | The guard method of transition resistance ground fault on line is sent out for photovoltaic plant |
| CN109361199B (en) * | 2018-10-10 | 2023-10-20 | 国网浙江省电力有限公司台州供电公司 | Protection method for transition resistor ground fault on photovoltaic power station outgoing line |
| CN110058125A (en) * | 2019-05-10 | 2019-07-26 | 云南电力技术有限责任公司 | A kind of method for locating single-phase ground fault and system |
| CN110058125B (en) * | 2019-05-10 | 2021-08-24 | 云南电力技术有限责任公司 | Single-phase earth fault positioning method and system |
| CN110609212A (en) * | 2019-09-26 | 2019-12-24 | 孙正武 | Overhead distribution line single-phase earth fault positioning method and system |
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Effective date of registration: 20121009 Address after: 200122 Shanghai City, Pudong New Area source deep road, No. 1122 Applicant after: Shanghai Electric Power Corporation Applicant after: State Grid Corporation of China Address before: 200122 Shanghai City, Pudong New Area source deep road, No. 1122 Applicant before: Shanghai Electric Power Corporation |
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Application publication date: 20121024 |