CN114200251A - Power grid fault detection and early warning device - Google Patents
Power grid fault detection and early warning device Download PDFInfo
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- CN114200251A CN114200251A CN202111559687.9A CN202111559687A CN114200251A CN 114200251 A CN114200251 A CN 114200251A CN 202111559687 A CN202111559687 A CN 202111559687A CN 114200251 A CN114200251 A CN 114200251A
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- 238000001514 detection method Methods 0.000 title claims abstract description 17
- 239000003990 capacitor Substances 0.000 claims abstract description 31
- 238000005259 measurement Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 7
- 238000013480 data collection Methods 0.000 description 5
- 230000008030 elimination Effects 0.000 description 5
- 238000003379 elimination reaction Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
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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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- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a power grid fault detection and early warning device, and relates to the technical field of power grid fault detection. The invention comprises a PT transformer, a capacitor, a cable measuring end, a spherical discharger and a data collector; the PT transformer is electrically connected with the spherical discharger through a conducting wire, the spherical discharger is electrically connected with the capacitor through the conducting wire, the capacitor is electrically connected with the cable measuring end through the conducting wire, and a data collector is also arranged between the capacitor and the cable measuring end in series through the conducting wire; the data acquisition unit mainly comprises microprocessor, contrast module, storage module, data acquisition module and alarm, and microprocessor passes through the conducting wire respectively with contrast module, storage module, data acquisition module and alarm electric connection. The device can be used for quickly and efficiently detecting the fault point of the power distribution network, the fault removal safety is high, meanwhile, the early warning of the power distribution network can be realized, and the overall practicability is high.
Description
Technical Field
The invention belongs to the technical field of power grid fault detection, and particularly relates to a power grid fault detection and early warning device.
Background
With the continuous development of science and technology, electric power engineering belongs to the indispensable engineering in people's construction, and the distribution network is mainly used for effectively distributing the regional electric power according to the regional needs, so that the electric power requirements of people are effectively met, in the long-time use process, the normal operation of the distribution network can be seriously damaged due to the aging of equipment, the failure of power connection protection function, the inaccurate line selection of ground fault and other reasons, at present, when people meet the distribution network fault, the fault is eliminated through the comprehensive fault management and control technology of the distribution network, but the fault elimination mode still has the following defects in the actual use process;
1. the existing obstacle removing method needs a great deal of time and manpower, the personal safety of the obstacle removing personnel is low, and especially for long cables of 3-4km, the obstacle removing still has great difficulty;
2. the existing fault removing method can only remove faults of cables which have faults, cannot carry out early warning and troubleshooting on cables which have not faults, and is poor in overall applicability;
therefore, there is a need for improvement of the prior art to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a power grid fault detection and early warning device which is high in power distribution network fault elimination efficiency and can early warn in advance, and solves the problems that the existing power grid fault detection technology is low in fault elimination efficiency, low in personal safety of fault elimination personnel and incapable of early fault elimination and early warning in the actual use process.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a power grid fault detection and early warning device, which comprises a PT transformer, a capacitor and a cable measuring end, and is characterized in that: the device also comprises a spherical discharger and a data acquisition unit;
the PT transformer is electrically connected with the spherical discharger through a conducting wire, the spherical discharger is electrically connected with the capacitor through the conducting wire, the capacitor is electrically connected with the cable measuring end through the conducting wire, and a data collector is further arranged between the capacitor and the cable measuring end in series through the conducting wire;
the data acquisition unit mainly comprises a microprocessor, a comparison module, a storage module, a data acquisition module and an alarm, and the microprocessor is respectively and electrically connected with the comparison module, the storage module, the data acquisition module and the alarm through conducting wires.
Further, the discharge voltage of the capacitor is 7-10kV, and the discharge time is every 5 min/time.
Furthermore, a conducting wire between the ball discharger and the capacitor is externally connected with a ground wire.
Furthermore, a resistor is also connected in series on a conducting wire between the data acquisition unit and the cable measuring end.
Furthermore, the data acquisition unit further comprises a power supply assembly and a protection module, wherein the power supply assembly is connected with the microprocessor through a conducting wire, and the protection module is electrically connected with the data acquisition module through a conducting wire.
Furthermore, the data acquisition unit also comprises a wireless receiving and transmitting module which is electrically connected with the microprocessor through a conducting wire and is also connected with the control terminal through wireless.
Further, the data acquisition module is mainly used for acquiring voltage, current, discharge time and temperature data.
Furthermore, the embedded cable sound collection device further comprises a sound collector for carrying out auxiliary sound collection on the embedded cable.
The invention has the following beneficial effects:
1. when the device is used, current after the PT transformer transforms voltage is input into the capacitor to be stored, the spherical discharger can be broken down when electric energy stored in the capacitor reaches a certain value, at the moment, the electric energy stored in the capacitor can be completely released through a short circuit formed by tip current of the spherical discharger, the released current enters the cable through the cable measuring end, at the moment, high-voltage flashover discharge can occur at a cable fault point, sound is generated, a worker can quickly discharge the fault point at a far position and find the fault point, and the device can effectively prevent barrier removal personnel from approaching the fault point, so that the safety of the barrier removal personnel is improved.
2. In the discharging process of the capacitor, the data acquisition module acquires relevant data and stores the data in the storage module, if the cable breaks down in a later period of time, a worker can analyze and mark the acquired data, when the worker acquires the data again, the comparison module compares the acquired data with the acquired data, and when the data are similar, the comparison module controls the alarm to give an alarm to play a role of early warning.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic block diagram of a data collector in the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a PT transformer; 2. a spherical discharger; 3. a data acquisition unit; 4. a resistor; 5. a capacitor; 6. a cable measurement end; 301. a protection module; 302. a data acquisition module; 303. a microprocessor; 304. a comparison module; 305. a storage module; 306. an alarm; 307. a wireless transceiving module; 308. and a power supply assembly.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1, the invention relates to a power grid fault detection and early warning device, which comprises a PT transformer 1, a capacitor 5, a cable measuring terminal 6, a ball discharger 2 and a data collector 3;
the PT transformer 1 is electrically connected with the spherical discharger 2 through a conducting wire, the spherical discharger 2 is electrically connected with the capacitor 5 through a conducting wire, the capacitor 5 is electrically connected with the cable measuring end 6 through a conducting wire, and the capacitor 5 and the cable measuring end 6 are also serially connected with a data collector 3 through a conducting wire; a conducting wire between the spherical discharger 2 and the capacitor 5 is also externally connected with a ground wire, the external ground wire can protect the whole device, a conducting wire between the data collector 3 and the cable measuring end 6 is also connected with a resistor 4 in series, and the resistor 4 can play a role of protection between the capacitor 5 and the cable measuring end 6;
the device also comprises a sound collector (not shown in the attached drawing) for carrying out auxiliary sound collection on the buried cable, wherein the sound collector mainly detects the sound discharged by the cable;
when the arrangement is used, electric energy is stored in the capacitor 5 after voltage regulation is carried out through the PT transformer 1, after the capacitor 5 stores energy to a certain degree, the spherical discharger 2 can be broken down, after the electric energy is broken down, the electric energy in the capacitor 5 is discharged through a short circuit formed at the spherical discharger 2 after the electric energy is broken down and enters the cable through the cable measuring end 6, and under the action, a fault point of the cable can generate noise due to high-voltage flashover discharge, so that a worker can conveniently find the fault point;
it should be noted that the device is suitable for fault removal of a 6kV power distribution network, and multiple tests show that when the discharge voltage of the capacitor 5 is 7-10kV and the discharge time is every 5 min/time, a worker can conveniently patrol and examine the device, and meanwhile, a normal insulating layer of a cable can be prevented from being broken down and damaged.
Referring to fig. 2, the data collector 3 mainly includes a microprocessor 303, a comparison module 304, a storage module 305, a data collection module 302 and an alarm 306, the microprocessor 303 is electrically connected to the comparison module 304, the storage module 305, the data collection module 302 and the alarm 306 through conductive wires, the microprocessor 303 is used to control electrical components, the comparison module 304 is used to compare data, the storage module 305 is used to store collected data, the data collection module 302 is used to collect data, the data collected by the data collection module 302 mainly includes voltage, current, discharge time and temperature data, and the alarm 306 can give an alarm when early warning is performed;
the data acquisition device 3 further comprises a power supply assembly 308 and a protection module 301, wherein the power supply assembly 308 is in electric wire connection with the microprocessor 303 through a conducting wire, meanwhile, the protection module 301 is electrically connected with the data acquisition module 302 through a conducting wire, the power supply assembly 308 is used for supplying power to the interior of the data acquisition device 3, and the protection module 301 can play a role in protection, so that the data acquisition device 3 is prevented from being damaged when the capacitor 5 is rapidly discharged;
the data acquisition unit 3 further comprises a wireless transmitting and receiving module 307, wherein the wireless transmitting and receiving module 307 is electrically connected with the microprocessor 303 through a conducting wire and is also wirelessly connected with the control terminal, and the arrangement is convenient for data centralized analysis and data interaction among the data acquisition units 3;
above-mentioned setting is when using, condenser 5 discharges the in-process, data acquisition module 302 can gather relevant data, and store in storage module 305, if in a period of time later, the cable breaks down, the staff can carry out analysis mark to the data of gathering before, when the staff is once more when gathering data, contrast module 304 can compare the data of gathering with the data of gathering, when finding that data is similar, a threshold value can be set for as required to the similarity here, can control alarm 306 and send out the police dispatch newspaper, play the effect of early warning in advance, wireless transceiver module 307 can be handled information transmission to control terminal simultaneously, be convenient for a plurality of data collection station 3's data interaction.
The above are only preferred embodiments of the present invention, and the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made to the technical solutions described in the above embodiments, and to some of the technical features thereof, are included in the scope of the present invention.
Claims (8)
1. The utility model provides a grid fault detects and early warning device, includes PT transformer (1), condenser (5) and cable measurement end (6), its characterized in that: the device also comprises a spherical discharger (2) and a data collector (3);
the PT transformer (1) is electrically connected with the spherical discharger (2) through a conducting wire, the spherical discharger (2) is electrically connected with the capacitor (5) through the conducting wire, the capacitor (5) is electrically connected with the cable measuring end (6) through the conducting wire, and the capacitor (5) and the cable measuring end (6) are also serially connected with a data collector (3) through the conducting wire;
the data acquisition unit (3) mainly comprises a microprocessor (303), a comparison module (304), a storage module (305), a data acquisition module (302) and an alarm (306), and the microprocessor (303) is respectively electrically connected with the comparison module (304), the storage module (305), the data acquisition module (302) and the alarm (306) through conducting wires.
2. A grid fault detection and pre-warning device according to claim 1, characterized in that the discharge voltage of the capacitor (5) is 7-10kV and the discharge time is every 5 min/time.
3. A grid fault detection and pre-warning device according to claim 1, characterized in that a conducting line between the ball discharger (2) and the capacitor (5) is further externally connected to a ground line.
4. A power grid fault detection and early warning device according to claim 3, characterized in that a resistor (4) is also connected in series on a conducting line between the data collector (3) and the cable measuring terminal (6).
5. The power grid fault detection and early warning device according to claim 1, wherein the data acquisition unit (3) further comprises a power supply assembly (308) and a protection module (301), the power supply assembly (308) is connected with the microprocessor (303) through a conductive wire, and the protection module (301) is electrically connected with the data acquisition module (302) through a conductive wire.
6. The power grid fault detection and early warning device according to claim 5, wherein the data acquisition unit (3) further comprises a wireless transceiver module (307), and the wireless transceiver module (307) is electrically connected with the microprocessor (303) through a conducting wire and is also wirelessly connected with the control terminal.
7. The grid fault detection and early warning device according to claim 6, wherein the data acquisition module (302) is mainly used for acquiring voltage, current, discharge time and temperature data.
8. The grid fault detection and early warning device according to any one of claims 2 to 6, further comprising a sound collector for assisting sound collection of the buried cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111559687.9A CN114200251A (en) | 2021-12-20 | 2021-12-20 | Power grid fault detection and early warning device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111559687.9A CN114200251A (en) | 2021-12-20 | 2021-12-20 | Power grid fault detection and early warning device |
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| CN114200251A true CN114200251A (en) | 2022-03-18 |
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| CN202111559687.9A Pending CN114200251A (en) | 2021-12-20 | 2021-12-20 | Power grid fault detection and early warning device |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109568A (en) * | 2009-12-28 | 2011-06-29 | 中国铝业股份有限公司 | Cable fault diagnosis device for direct current (DC) impulse voltage generator |
| CN201892718U (en) * | 2010-11-26 | 2011-07-06 | 天津二十冶建设有限公司 | Discharge type cable fault detection device |
| CN202057755U (en) * | 2011-04-28 | 2011-11-30 | 中冶建工集团有限公司 | Cable fault detector |
| CN206311708U (en) * | 2017-01-04 | 2017-07-07 | 国网河南省电力公司新密市供电公司 | On-line monitoring of cable device and its system |
| CN107450473A (en) * | 2017-08-03 | 2017-12-08 | 南京航空航天大学 | A kind of calculating of CFXYZA types five-axle number control machine tool rotary shaft geometric error, compensation and its verification method |
| CN210720621U (en) * | 2019-07-31 | 2020-06-09 | 华电湖北发电有限公司电力工程分公司 | Fault testing device for power cable |
| CN112526927A (en) * | 2021-02-18 | 2021-03-19 | 成都飞机工业（集团）有限责任公司 | Quick optimization compensation method for space positioning error of rotating shaft of five-axis numerical control machine tool |
-
2021
- 2021-12-20 CN CN202111559687.9A patent/CN114200251A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109568A (en) * | 2009-12-28 | 2011-06-29 | 中国铝业股份有限公司 | Cable fault diagnosis device for direct current (DC) impulse voltage generator |
| CN201892718U (en) * | 2010-11-26 | 2011-07-06 | 天津二十冶建设有限公司 | Discharge type cable fault detection device |
| CN202057755U (en) * | 2011-04-28 | 2011-11-30 | 中冶建工集团有限公司 | Cable fault detector |
| CN206311708U (en) * | 2017-01-04 | 2017-07-07 | 国网河南省电力公司新密市供电公司 | On-line monitoring of cable device and its system |
| CN107450473A (en) * | 2017-08-03 | 2017-12-08 | 南京航空航天大学 | A kind of calculating of CFXYZA types five-axle number control machine tool rotary shaft geometric error, compensation and its verification method |
| CN210720621U (en) * | 2019-07-31 | 2020-06-09 | 华电湖北发电有限公司电力工程分公司 | Fault testing device for power cable |
| CN112526927A (en) * | 2021-02-18 | 2021-03-19 | 成都飞机工业（集团）有限责任公司 | Quick optimization compensation method for space positioning error of rotating shaft of five-axis numerical control machine tool |
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