CN112557760A - Ground wire anti-theft protection system - Google Patents
Ground wire anti-theft protection system Download PDFInfo
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- CN112557760A CN112557760A CN202011436715.3A CN202011436715A CN112557760A CN 112557760 A CN112557760 A CN 112557760A CN 202011436715 A CN202011436715 A CN 202011436715A CN 112557760 A CN112557760 A CN 112557760A
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- 238000012544 monitoring process Methods 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims description 17
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
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- 230000006698 induction Effects 0.000 claims description 7
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- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 230000005674 electromagnetic induction Effects 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
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- 230000002159 abnormal effect Effects 0.000 description 6
- 239000002184 metal Substances 0.000 description 3
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- 238000002485 combustion reaction Methods 0.000 description 1
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- 238000010438 heat treatment Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
- G01R27/205—Measuring contact resistance of connections, e.g. of earth connections
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Abstract
A ground wire anti-theft protection system comprises a ground resistance acquisition device, a ground protection device and a ground protection device, wherein the ground resistance acquisition device is used for acquiring the ground resistance of a main ground wire; the bypass grounding protection device is connected with the main grounding wire in parallel and is used for providing bypass grounding for the power supply cable on the main grounding wire; and the processor unit is connected with the grounding resistance acquisition device and used for receiving the grounding resistance value. According to the embodiment of the invention, the grounding resistance value of the main grounding wire can be acquired through the grounding resistance acquisition device, and compared with the traditional monitoring mode through a vibration sensor, the monitoring accuracy is greatly improved. The bypass grounding protection device can provide bypass protection for the main grounding wire, and after the main grounding wire is cut off in a stolen mode, the bypass grounding can be continuously provided, so that direct failure is prevented, and time is strived for rescue. The received information can be transmitted to an external monitoring platform or monitoring end through the processor unit, once the information is stolen, the dangerous situation can be found at the first time, and maintenance personnel can be dispatched in time to solve the problem.
Description
Technical Field
The invention belongs to the field of power supply and distribution equipment, and particularly relates to a ground wire anti-theft protection system.
Background
The high-voltage cable is generally a single-core cable, and the metal sheath of the high-voltage cable generally adopts a cross-connection grounding or single-end direct grounding operation mode. The induced voltage on the surface of the metal sheath is only dozens of volts under the condition that the grounding system is intact, but when the grounding system is abnormal, such as the grounding wire is stolen, the induced voltage on the surface of the metal sheath can rise to hundreds of volts. If the cable is not discovered and treated in time, the outer sheath or the sheath protector can be burnt, and even the main insulation breakdown accident of the cable can be caused under the serious condition.
In recent years, the situation that cable grounding wires are stolen all over the country exists, and the situation that the cable grounding wires are continuously stolen after being repaired exists, wherein the situation that the grounding wires of outdoor cable terminals are stolen is particularly obvious because the grounding wires are led out from outdoor towers. Arouse the attention of domestic related departments and industries on the anti-theft cutting of grounding cables. The inspection by manpower has the problems of large workload, high working strength, incapability of realizing real-time monitoring and the like. At present, video monitoring or vibration sensor monitoring and other modes are mainly adopted for monitoring the anti-theft of the grounding wire of the outdoor cable terminal, but the defects of high power supply power, high power consumption, false alarm of the vibration sensor and the like of the video monitoring exist, the situation that the grounding wire is stolen and cut cannot be automatically recovered, and the possibility of heating combustion and main insulation breakdown of the high-voltage cable still exists.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a ground wire anti-theft protection system which is simple in structure and solves the problems that the monitoring effect is poor and the protection cannot be provided when the main ground wire is stolen and cut.
According to the ground wire anti-theft protection system provided by the embodiment of the invention, the ground resistance acquisition device is used for acquiring the ground resistance value of the main ground wire; the bypass grounding protection device is connected with the main grounding wire in parallel and is used for providing bypass grounding for the power supply cable at the main grounding wire; and the processor unit is connected with the grounding resistance acquisition device and used for receiving the grounding resistance value.
The anti-theft protection system for the grounding wire according to the embodiment of the invention at least has the following technical effects: can gather the ground resistance of main earth connection through ground resistance collection system, and the ground resistance of main earth connection can be directly effectual to reflect the ground connection state of main earth connection, for traditional mode through vibrations sensor monitoring, very big improvement the accuracy of monitoring. The bypass grounding protection device can provide bypass protection for the main grounding wire, and after the main grounding wire is cut off in a stolen mode, the bypass grounding can be continuously provided, so that direct failure is prevented, and time is strived for rescue. The received information can be transmitted to an external monitoring platform or monitoring end through the processor unit, once the information is stolen, the dangerous situation can be found at the first time, and maintenance personnel can be dispatched in time to solve the problem.
According to some embodiments of the invention, the ground resistance collection device comprises: the input signal acquisition coil is connected with the processor unit and used for acquiring the grounding resistance value of the main grounding wire and transmitting the grounding resistance value to the processor unit; and the excitation voltage output coil is used for outputting excitation voltage to the input signal acquisition coil.
According to some embodiments of the present invention, a signal amplification module, a filtering module and a digital-to-analog conversion module are sequentially connected between the input signal acquisition coil and the processor unit.
According to some embodiments of the invention, a signal isolator is connected between the digital-to-analog conversion module and the processor unit.
According to some embodiments of the invention, the bypass earth protection device comprises: a sub ground line having one end connected to ground; and one end of the connecting copper bar is connected with the other end of the auxiliary grounding wire, and the other end of the connecting copper bar is connected with the main grounding wire.
According to some embodiments of the present invention, the above ground wire anti-theft protection system further includes an induction CT self-power-taking device, and the induction CT self-power-taking device is configured to obtain electric energy from the power supply cable by means of electromagnetic induction and supply the electric energy to the ground wire resistance collecting device and the processor unit.
According to some embodiments of the invention, the inductive CT self-power take-off device comprises: the mutual inductor is used for inducing the electric signal in the power supply cable and outputting electric energy; and the power supply module is connected with the mutual inductor and used for receiving the electric energy output by the mutual inductor, rectifying, stabilizing and filtering the electric energy and supplying the electric energy to the grounding resistance acquisition device and the processor unit.
According to some embodiments of the present invention, the ground wire anti-theft protection system further includes a wireless communication unit connected to the processor unit.
According to some embodiments of the present invention, the ground wire anti-theft protection system further includes a signal conversion unit disposed between the processor unit and the wireless communication unit, and the signal conversion unit is configured to convert the signal output by the processor unit into a signal with stronger interference resistance.
According to some embodiments of the present invention, the ground wire anti-theft protection system further includes a monitoring platform connected to the processor unit for performing remote monitoring.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Reference numerals:
the ground resistance acquisition device 100, the input signal acquisition coil 110, the excitation voltage output coil 120, the signal amplification module 130, the filtering module 140, the digital-to-analog conversion module 150, the signal isolator 160,
A bypass grounding protection device 200, an auxiliary grounding wire 210, a connecting copper bar 220,
A processor unit 300,
A main grounding wire 400,
The induction CT self-powered device 500,
A wireless communication unit 600,
A signal conversion unit 700,
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, if there are first, second, third, fourth, etc. described only for the purpose of distinguishing technical features, they are not to be interpreted as indicating or implying relative importance or implying number of indicated technical features or implying precedence of indicated technical features.
In the description of the present invention, unless otherwise explicitly defined, terms such as arrangement, connection and the like should be broadly construed, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the detailed contents of the technical solutions.
A ground wire antitheft protection system according to an embodiment of the present invention is described below with reference to fig. 1.
The ground wire anti-theft protection system according to the embodiment of the invention comprises a ground resistance acquisition device 100, a bypass ground protection device 200 and a processor unit 300. The grounding resistance acquisition device 100 is used for acquiring the grounding resistance value of the main grounding wire 400; a bypass ground protection device 200 connected in parallel with the main ground line 400 for providing a bypass ground for the power supply cable at the main ground line 400; and the processor unit 300 is connected with the grounding resistance acquisition device 100 and is used for receiving the grounding resistance value.
Referring to fig. 1, the ground resistance collecting device 100 collects real-time changes of the ground resistance of the main ground wire 400, thereby implementing real-time monitoring of the operating condition of the main ground wire 400. When the main ground wire 400 normally operates, the main ground wire 400 is intact, the ground resistance is small, and the resistance value of the ground wire is usually only a few ohms; when the main ground wire 400 is abnormal, such as stolen, the main ground wire 400 is disconnected, so the ground resistance becomes infinite, and the ground resistance of the main ground wire collected by the ground resistance collecting device 100 is also abnormal. Then, the processor unit 300 transmits the abnormal information to the monitoring platform 800, and the monitoring platform 800 sends alarm information to remind maintenance personnel of the dangerous situation.
Referring to fig. 1, the bypass ground protection device 200 is connected in parallel with the main ground line 400 and forms a ground loop with the cable main ground line 400. When the main grounding wire 400 is abnormal, the bypass grounding protection device 200 can form grounding protection on the power supply cable, so that the safe and stable operation of the power supply system is ensured, the processing time of related maintenance personnel on the abnormal condition of the main grounding wire 400 is given, and the occurrence of heavy loss is avoided.
According to the ground wire anti-theft protection system provided by the embodiment of the invention, the ground resistance value of the main ground wire 400 can be acquired through the ground resistance acquisition device 100, and the ground resistance value of the main ground wire 400 can directly and effectively reflect the ground state of the main ground wire 400, so that the monitoring accuracy is greatly improved compared with the traditional monitoring mode through a vibration sensor. The bypass grounding protection device 200 can provide bypass protection for the main grounding wire 400, and after the main grounding wire 400 is cut off by theft, the bypass grounding can be continuously provided, so that direct failure is prevented, and time is won for rescue. The received information can be transmitted to the external monitoring platform 800 or monitoring end through the processor unit 300, once stolen, dangerous situations can be found at the first time, and maintenance personnel can be dispatched in time to solve the problems.
In some embodiments of the present invention, the ground resistance collection device 100 includes: an input signal acquisition coil 110 and an excitation voltage output coil 120. The input signal acquisition coil 110 is connected with the processor unit 300, and is used for acquiring the grounding resistance value of the main grounding wire 400 and transmitting the grounding resistance value to the processor unit 300; and an excitation voltage output coil 120 for outputting an excitation voltage to the input signal collecting coil 110. The excitation voltage output coil 120 steps down the 12V dc voltage of the system power supply to 1V through a step-down circuit, and outputs the voltage to the input signal collecting coil 110 after filtering and voltage stabilization, so that the input signal collecting coil 110 can accurately collect the ground resistance value of the main ground wire 400. The principle of the ground resistance collecting device 100 for collecting the resistance may refer to the principle of a digital micro-ohmmeter for measuring the resistance.
In some embodiments of the present invention, a signal amplifying module 130, a filtering module 140 and a digital-to-analog conversion module 150 are sequentially connected between the input signal collecting coil 110 and the processor unit 300. The quality of the signal directly acquired by the input signal acquisition coil 110 is usually poor, and at this time, the signal needs to be preprocessed by the signal amplification module 130 and the filtering module 140, and then converted into a digital signal by the digital-to-analog conversion module 150 and then input into the processor unit 300.
In some embodiments of the present invention, a signal isolator 160 is connected between the digital-to-analog conversion module 150 and the processor unit 300. In order to ensure the safety of the processor unit 300, the signal output by the digital-to-analog conversion module 150 is not directly input to the processor unit 300, and is isolated by the signal isolator 160.
In some embodiments of the present invention, the bypass grounding protection device 200 comprises: a secondary ground line 210 and a connecting copper bar 220. A sub ground line 210 having one end connected to ground; one end of the connecting copper bar 220 is connected to the other end of the auxiliary ground line 210, and the other end is connected to the main ground line 400. The bypass of the main ground line 400 may be accomplished by the sub ground line 210 and the connecting copper bar 220.
In some embodiments of the present invention, the above ground wire anti-theft protection system further includes an induction CT self-powered device 500, and the induction CT self-powered device 500 is configured to obtain electric energy from the power supply cable by means of electromagnetic induction and supply the electric energy to the ground resistance collecting device 100 and the processor unit 300. After the induction CT self-powered device 500 is adopted, the ground wire anti-theft protection system in the embodiment of the present invention can be separated from the constraint of the external power supply, so that on one hand, a large amount of wiring can be saved, and on the other hand, the arrangement position of the ground wire anti-theft protection system in the embodiment of the present invention can be more selected.
In some embodiments of the present invention, the inductive CT self-power take 500 comprises: mutual-inductor, power module. The mutual inductor is used for inducing the electric signal in the power supply cable and outputting electric energy; and the power supply module is connected with the mutual inductor and used for receiving the electric energy output by the mutual inductor, rectifying, stabilizing and filtering the electric energy, and supplying the electric energy to the grounding resistance acquisition device 100 and the processor unit 300. The mutual inductor can directly sense the electric signal in the power supply cable, and then produce the electric energy, and the electric energy of production transmits power module, supplies power after carrying out operations such as rectification, filtering, steady voltage through power module. The excitation voltage output by the excitation voltage output coil 120 can be taken from the power module.
In some embodiments of the present invention, the above-mentioned ground wire anti-theft protection system further includes a wireless communication unit 600 connected to the processor unit 300. The processor unit 300 may transmit the collected ground resistance data to the remote monitoring platform 800 through the wireless communication unit 600. The wireless communication unit 600 may employ bluetooth, ZigBee, a network module, or a GPRS module, etc.
In some embodiments of the present invention, the above-mentioned ground wire anti-theft protection system further includes a signal conversion unit 700 disposed between the processor unit 300 and the wireless communication unit 600, and the signal conversion unit 700 is configured to convert the signal output by the processor unit 300 into a signal with stronger interference resistance. In order to improve the data interference resistance during signal transmission, the signal conversion unit 700 may be used to convert the signal output by the processor unit 300, for example: and the TTL level signal is converted into a 485 signal, so that the anti-interference capability can be improved.
In some embodiments of the present invention, the ground wire anti-theft protection system further includes a monitoring platform 800 connected to the processor unit 300 for performing remote monitoring. The monitoring platform 800 may use a computer directly as the monitoring device, or may use a mobile device such as a tablet computer or a mobile phone as the monitoring terminal. Through setting up monitoring platform 800, can realize monitoring when needs carry out ground resistance to a plurality of places and gather, and then be convenient for carry out reasonable dispatch to maintainer.
In some embodiments of the present invention, the processor unit 300 employs a single chip or a DSP. Specifically, a single chip microcomputer may be used as the processor unit 300, and optionally, the single chip microcomputer includes, but is not limited to, an STM32 series single chip microcomputer.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the embodiments, and those skilled in the art will understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An earth connection theftproof protection system, characterized by, includes:
the grounding resistance acquisition device (100) is used for acquiring the grounding resistance value of the main grounding wire (400);
a bypass ground protection device (200) connected in parallel with the main ground line (400) for providing a bypass ground for the power supply cable at the main ground line (400);
and the processor unit (300) is connected with the grounding resistance acquisition device (100) and is used for receiving the grounding resistance value.
2. The ground wire anti-theft protection system according to claim 1, characterized in that the ground resistance collection device (100) comprises:
the input signal acquisition coil (110) is connected with the processor unit (300) and is used for acquiring the grounding resistance value of the main grounding wire (400) and transmitting the grounding resistance value to the processor unit (300);
an excitation voltage output coil (120) for outputting an excitation voltage to the input signal acquisition coil (110).
3. The ground wire anti-theft protection system according to claim 2, characterized in that a signal amplification module (130), a filtering module (140) and a digital-to-analog conversion module (150) are connected in sequence between the input signal acquisition coil (110) and the processor unit (300).
4. The ground wire anti-theft protection system according to claim 3, characterized in that a signal isolator (160) is connected between the digital-to-analog conversion module (150) and the processor unit (300).
5. The ground wire anti-theft protection system according to claim 1, characterized in that the bypass ground protection device (200) comprises:
a secondary ground line (210) having one end connected to ground;
and one end of the connecting copper bar (220) is connected with the other end of the auxiliary grounding wire (210), and the other end of the connecting copper bar is connected with the main grounding wire (400).
6. The ground wire anti-theft protection system according to claim 1, further comprising an inductive CT self-power-take device (500), wherein the inductive CT self-power-take device (500) is used for obtaining electric energy from the power supply cable by means of electromagnetic induction and supplying the ground resistance acquisition device (100) and the processor unit (300).
7. The ground wire anti-theft protection system according to claim 6, characterized in that the induction CT self-powered device (500) comprises:
the mutual inductor is used for inducing the electric signal in the power supply cable and outputting electric energy;
and the power supply module is connected with the mutual inductor and used for receiving the electric energy output by the mutual inductor, rectifying, stabilizing and filtering the electric energy and supplying the electric energy to the grounding resistance acquisition device (100) and the processor unit (300).
8. The ground wire anti-theft protection system according to claim 1, further comprising a wireless communication unit (600) connected to the processor unit (300).
9. The ground wire anti-theft protection system according to claim 8, further comprising a signal conversion unit (700) disposed between the processor unit (300) and the wireless communication unit (600), wherein the signal conversion unit (700) is configured to convert the signal output by the processor unit (300) into a signal with stronger interference resistance.
10. The ground wire anti-theft protection system according to claim 1 or 8, further comprising a monitoring platform (800) connected to the processor unit (300) for remote monitoring.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011436715.3A CN112557760A (en) | 2020-12-11 | 2020-12-11 | Ground wire anti-theft protection system |
| PCT/CN2021/085531 WO2022121191A1 (en) | 2020-12-11 | 2021-04-06 | Grounding cable antitheft protection system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011436715.3A CN112557760A (en) | 2020-12-11 | 2020-12-11 | Ground wire anti-theft protection system |
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| CN112557760A true CN112557760A (en) | 2021-03-26 |
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Cited By (1)
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| WO2022121191A1 (en) * | 2020-12-11 | 2022-06-16 | 长缆电工科技股份有限公司 | Grounding cable antitheft protection system |
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| CN115656630B (en) * | 2022-09-29 | 2024-02-13 | 江苏省电力试验研究院有限公司 | High-precision testing method and device for loop resistance of cable cross-connection grounding system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201569705U (en) * | 2009-11-06 | 2010-09-01 | 国电龙源电气有限公司 | Monitoring device for ground wire resistance and current of distribution transformer |
| CN101728777B (en) * | 2009-11-09 | 2011-12-07 | 上海市电力公司 | Installation method of distribution network automation device of 10kV power distribution station |
| CN104965118A (en) * | 2015-01-14 | 2015-10-07 | 四川安普光控科技有限公司 | Antitheft type multifunctional wireless high-voltage cable sheath grounding current monitoring system |
| KR101737072B1 (en) * | 2016-07-13 | 2017-05-18 | 선광엘티아이(주) | Resistance and current observation system of the ground line |
| CN106597213B (en) * | 2016-11-11 | 2019-11-19 | 华北电力大学（保定） | Distributed electric line upkeep operation safeguard protection digitized monitoring system |
| CN109856460A (en) * | 2019-01-24 | 2019-06-07 | 国网山东省电力公司日照供电公司 | A kind of power distribution station grounding resistor monitoring system and monitoring method |
| CN110244101B (en) * | 2019-05-23 | 2022-03-22 | 国网山东省电力公司临沂供电公司 | Multifunctional external force damage prevention monitoring system and method for high-voltage cable fixing construction point |
| CN112557760A (en) * | 2020-12-11 | 2021-03-26 | 长缆电工科技股份有限公司 | Ground wire anti-theft protection system |
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2020
- 2020-12-11 CN CN202011436715.3A patent/CN112557760A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022121191A1 (en) * | 2020-12-11 | 2022-06-16 | 长缆电工科技股份有限公司 | Grounding cable antitheft protection system |
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Country or region after: China Address after: 410000 No. 223, tongzipo West Road, Lugu Industrial Park, high tech Development Zone, Changsha, Hunan Applicant after: Long Cable Technology Group Co.,Ltd. Address before: No.223, tongzipo West Road, Lugu Industrial Park, high tech Development Zone, Changsha City, Hunan Province, 410205 Applicant before: CHANGLAN CABLE ACCESSORIES Co.,Ltd. Country or region before: China |