CN210222115U - Single core cable grounding current intelligent monitoring system - Google Patents
Single core cable grounding current intelligent monitoring system Download PDFInfo
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- CN210222115U CN210222115U CN201920450209.6U CN201920450209U CN210222115U CN 210222115 U CN210222115 U CN 210222115U CN 201920450209 U CN201920450209 U CN 201920450209U CN 210222115 U CN210222115 U CN 210222115U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 29
- 238000004891 communication Methods 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 26
- 238000012806 monitoring device Methods 0.000 claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 239000011241 protective layer Substances 0.000 claims abstract description 8
- 230000005611 electricity Effects 0.000 claims description 5
- 230000007547 defect Effects 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model relates to a single core cable ground current intelligent monitoring system, including being used for installing the current transformer at the ground connection cable metal protective layer of high tension cable A looks, high tension cable B looks and high tension cable C looks, current transformer is used for detecting the electric current of ground connection cable metal protective layer, current transformer is connected with information acquisition device for give information acquisition device with the electric current information transmission who gathers, information acquisition device passes through wireless communication module and is connected with backstage monitoring devices, gives backstage monitoring devices with the electric current information transmission who gathers, the utility model discloses a monitored control system can effectively monitor ground connection cable metal protective layer electric current, discovery cable ground connection system defect that can be timely accurate, ensures the reliable and stable operation of high tension cable circuit.
Description
Technical Field
The utility model relates to a cable monitoring equipment technical field, concretely relates to single core cable grounding current intelligent monitoring system.
Background
The high-voltage cables are single-core crosslinked polyethylene insulated cables with metal sleeves, and two grounding modes of the metal sheath of the cable are provided, wherein one mode is that one end of the metal sheath of the single-core cable is protected and grounded, and the other end of the metal sheath is directly grounded, and the current generated by the metal sheath is smaller than about 1A; and the other one adopts a cross-connection mode for grounding, and the induced current generated by the cable metal sheath is generally less than 10% of the operating current according to the regulation requirement.
When the outer sheath of the cable is damaged at multiple points due to possible mechanical damage, possible chemical corrosion and rat damage in the operation process, the metal sheath is grounded at multiple points, and circulation is formed between the metal sheath and the ground. The increase of sheath circulating current can cause the cable to generate heat, and the loss is increased greatly, thereby influencing the current carrying capacity of the cable. And in severe cases, the operation safety of the power system network can be threatened. Conversely, if the cable grounding system fails to effectively ground for some reason, the induced voltage on the metal sheath will increase. The longer the length of the cable, the greater the load current of the cable ground, the higher the induced voltage, and the highest induced voltage can reach tens of thousands of volts. The personal safety of operation maintainers is seriously threatened, and the insulation layer of the protective layer can be punctured by the overhigh induction voltage, and the fire can be caused by continuous discharge at the puncturing point, so that the power failure accident of the power grid is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of above-mentioned prior art, provide a single core cable ground current monitored control system, discovery cable ground system's that can be timely accurate defect ensures the reliable stable operation of high tension cable circuit, alleviates field measurement's intensity of labour simultaneously greatly
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a single core cable ground current monitored control system, is including being used for installing the current transformer at the ground connection cable metal protective layer of high-voltage cable A looks, high-voltage cable B looks and high-voltage cable C looks, current transformer is used for detecting the electric current of ground connection cable metal protective layer, current transformer is connected with information acquisition device for give information acquisition device with the current information transmission who gathers, information acquisition device passes through wireless communication module and is connected with backstage monitoring devices, gives backstage monitoring devices with the current information transmission who gathers.
Furthermore, the wireless communication module adopts a GPRS/CDMA communication module, and comprises a main GPRS/CDMA communication module connected with the background monitoring device and a slave GPRS/CDMA communication module connected with the information acquisition device.
Furthermore, the information acquisition device is arranged in a shielded metal box and is connected with the current transformer through a shielded cable.
Further, the information acquisition device is connected with a CT electricity taking device used for being installed at a high-voltage cable A-phase terminal, and the CT electricity taking device supplies power to the information acquisition device.
Furthermore, the slave GPRS/CDMA module is arranged in the metal box and used for converting the received current data signal transmitted by the current transformer into a wireless signal and transmitting the wireless signal to the background monitoring device through the master GPRS/CDMA module.
Furthermore, the background monitoring device is a background monitoring server and can receive signals transmitted by the information acquisition device through the wireless communication module.
Furthermore, the background monitoring device is also connected with an alarm device, and the alarm device is used for giving an alarm when the monitoring current exceeds a set value.
Furthermore, the background monitoring device is connected with a computer terminal or a mobile phone terminal and can transmit monitoring information to the computer terminal or the mobile phone terminal.
The utility model has the advantages that:
the utility model discloses a single core cable ground current intelligent monitoring system, discovery cable grounding system defect that can be timely accurate ensures the reliable stable operation of high tension cable circuit, has realized intelligent monitoring simultaneously, can alleviate site-measurement's intensity of labour greatly, reduces witnessed inspections' frequency, improves system maintenance efficiency.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic view of the overall structure of the present invention;
the system comprises a high-voltage cable A phase 1, a high-voltage cable B phase 2, a high-voltage cable C phase 3, a grounding cable 4, a current transformer 5, a shielding cable 6, an information acquisition device 7, a CT power taking device 8, a wireless communication module 9, a background monitoring server 10, a computer terminal 11 and a mobile phone terminal 12.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As described in the background art, the defects of the cable grounding system can cause serious potential safety hazard, and in order to solve the problems, the application provides an intelligent monitoring system for the grounding current of a single-core cable.
In a typical embodiment of the present application, as shown in fig. 1, a single-core cable grounding current intelligent monitoring system comprises a current transformer 5 installed on a grounding cable 4 metal protection layer of a high-voltage cable a phase 1, a high-voltage cable B phase 2 and a high-voltage cable C phase 3, the current transformer has a good linear proportional relationship and saturation performance, and can output a current signal obtained by induction from the grounding cable metal protection layer from a secondary end, when in use, the current transformer is installed in a current collection box, the current transformer is connected with an information collection device 7 installed in a shielding metal box through a shielding cable 6, the metal box and the information collection device are installed near the grounding cable of the monitored high-voltage cable, the sealing and waterproof performance of the metal box should meet the IP68 standard, the information collection device is connected with a CT power taking device 8, the CT power taking device adopts an LPK2-P1 type CT power taking device, and is used for being installed at the terminal of the A phase of the high-voltage cable and supplying power to the information acquisition device.
The information acquisition device adopts a MCE-AI32 three-way alternating current collector and is connected with the background monitoring device through a wireless communication module 9, the wireless communication module adopts a GPRS/CDMA communication module and comprises a main GPRS/CDMA communication module connected with the background monitoring device and a secondary GPRS/CDMA communication module connected with the information acquisition device, the main GPRS/CDMA communication module and the secondary GPRS/CDMA communication module form a wireless data transmission network, the main GPRS/CDMA communication module periodically sends a data calling instruction to the secondary GPRS/CDMA communication module, and the secondary GPRS/CDMA communication module is responsible for sending the current and position information acquired by the information acquisition device to the background monitoring device. The information acquisition device converts current signals transmitted from the current transformer into voltage signals, the voltage signals are subjected to filtering, amplification and amplitude limiting processing, then acquired by a digital acquisition system, and after calculation processing, corresponding data are transmitted to the background monitoring device through the wireless communication module.
The background monitoring device is a background monitoring server 10 arranged in a control room of the transformer substation, realizes the communication acquisition of current data, the background monitoring server is connected with the alarm device, and alarms when the acquired current information exceeds a set current value, the background monitoring server acquires current data and alarm information from the information acquisition device through the wireless communication module, and the received current data is classified, calculated and analyzed, and the operations of displaying, storing, printing and alarming are carried out, meanwhile, the background monitoring server can be connected with the computer terminal 11 or the mobile phone terminal 12 through wireless transmission, the screened related measurement and alarm data are transmitted to a related maintainer mobile phone or a related computer of the centralized control center, and the final current data are formed into curve data and event alarm data by the centralized control center for storage.
Hardware of the background monitoring server can be configured into layers by a high-performance industrial personal computer or a universal server, and is flexibly configured according to the scale of the system.
The alarm parameter of the alarm system can be set by absolute value alarm, the user can set the maximum allowable value of the current of the metal sheath according to the power supply grade and the grounding mode of the circuit, when the measured value exceeds the set value, the alarm system gives an alarm, or by ratio alarm, the system automatically gives an alarm by calculating the ratio of the measured ground current to the current of the cable load, if the calculated ratio exceeds the set value. The load current of the cable can be directly obtained from the cable by adding a CT to the cable.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (8)
1. The utility model provides a single core cable ground current intelligent monitoring system, its characterized in that, is including being used for installing the current transformer at the ground connection cable metal protective layer of high-voltage cable A looks, high-voltage cable B looks and high-voltage cable C looks, current transformer is used for detecting the electric current of ground connection cable metal protective layer, current transformer is connected with information acquisition device for give information acquisition device with the current information transmission who gathers, information acquisition device passes through wireless communication module and is connected with backstage monitoring devices, gives backstage monitoring devices with the current information transmission who gathers.
2. The intelligent monitoring system of claim 1, wherein the wireless communication module is a GPRS/CDMA communication module, and comprises a master GPRS/CDMA communication module connected to the background monitoring device and a slave GPRS/CDMA communication module connected to the information acquisition device.
3. A single core cable grounding current intelligent monitoring system as claimed in claim 2, wherein said information acquisition device is installed in a shielded metal box, and is connected with the current transformer through a shielded cable.
4. The intelligent monitoring system for the grounding current of the single-core cable according to claim 1, wherein the information acquisition device is connected with a CT electricity taking device used for being installed at a phase A terminal of the high-voltage cable, and the CT electricity taking device supplies electricity to the information acquisition device.
5. A single core cable grounding current intelligent monitoring system as claimed in claim 3, wherein said slave GPRS/CDMA module is installed in said metal box, and is used to convert the received current data signal from the current transformer into wireless signal and transmit it to the background monitoring device through the master GPRS/CDMA module.
6. The intelligent monitoring system for the grounding current of the single-core cable according to claim 1, wherein the background monitoring device is a background monitoring server and can receive the signal transmitted by the information acquisition device through the wireless communication module.
7. The intelligent monitoring system for the grounding current of the single-core cable according to claim 1, wherein an alarm device is further connected to the background monitoring device, and the alarm device is used for giving an alarm when the monitoring current exceeds a set value.
8. The intelligent monitoring system for the grounding current of the single-core cable according to claim 1, wherein the background monitoring device is connected with a computer terminal or a mobile phone terminal and can transmit monitoring information to the computer terminal or the mobile phone terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920450209.6U CN210222115U (en) | 2019-04-03 | 2019-04-03 | Single core cable grounding current intelligent monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920450209.6U CN210222115U (en) | 2019-04-03 | 2019-04-03 | Single core cable grounding current intelligent monitoring system |
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| Publication Number | Publication Date |
|---|---|
| CN210222115U true CN210222115U (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920450209.6U Active CN210222115U (en) | 2019-04-03 | 2019-04-03 | Single core cable grounding current intelligent monitoring system |
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| Country | Link |
|---|---|
| CN (1) | CN210222115U (en) |
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- 2019-04-03 CN CN201920450209.6U patent/CN210222115U/en active Active
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