CN114184916A - Insulation state on-line monitoring system applied to 10KV cable distribution box - Google Patents
Insulation state on-line monitoring system applied to 10KV cable distribution box Download PDFInfo
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- CN114184916A CN114184916A CN202111513351.9A CN202111513351A CN114184916A CN 114184916 A CN114184916 A CN 114184916A CN 202111513351 A CN202111513351 A CN 202111513351A CN 114184916 A CN114184916 A CN 114184916A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 48
- 238000009413 insulation Methods 0.000 title claims abstract description 37
- 239000007857 degradation product Substances 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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Abstract
The invention relates to the technical field of cable insulation fault monitoring; the invention discloses an insulation state on-line monitoring system applied to a 10KV cable distribution box, which comprises: the system comprises an open type current transformer, a power supply module, a host, a 4G DTU module and a sensor; the open type mutual inductor is arranged on the outer wall of the cable to obtain induced current and is connected with the power supply module; the power supply module is respectively connected with the host, the 4G DTU module and the sensor, and the host is also respectively connected with the 4G DTU module and the sensor; the power supply module is used for carrying out voltage conversion and rectification on the induced current obtained by the open type current transformer to obtain stable voltage output and providing a low-voltage power supply for the system; the 4G DTU module is used for realizing bidirectional transparent data transmission from a serial port to a network, and transmitting data to a server through setting; the sensor is used for carrying out real-time online monitoring on the edge degradation product.
Description
Technical Field
The invention relates to the field of insulation state online monitoring, in particular to an insulation state online monitoring system applied to a 10KV cable distribution box.
Background
The 10KV cable distribution box is widely applied to medium-voltage distribution networks. The cable separable connector in the existing 10KV cable tapping box is also commonly called a cable terminal or plug, and is an accessory for connecting a cable to equipment such as a switch cabinet, a cable tapping box, a transformer and the like to form a power network. In recent years, the burning accidents of the separable cable connectors often occur, and most of the accidents are insulation accidents caused by partial discharge, so that the insulation monitoring of the cable distribution box needs to be enhanced. Most of the previous monitoring means are offline monitoring means such as ultrahigh frequency, ultrasonic waves and the like, the timeliness of monitoring results and the difference of results inside a box body cannot be guaranteed, the phenomena of missing report, false report and the like often occur, and insulation faults cannot be accurately and timely monitored.
Therefore, improvements and developments in the prior art are yet to be made.
Disclosure of Invention
The invention aims to provide an insulation state online monitoring system applied to a 10KV cable distribution box, and aims to solve the technical problems that the timeliness of monitoring results cannot be guaranteed by the existing offline monitoring means, and insulation fault monitoring is inaccurate.
In order to achieve the purpose, the technical scheme of the invention is as follows: an insulation state on-line monitoring system applied to a 10KV cable distribution box comprises: the system comprises an open type current transformer, a power supply module, a host, a 4G DTU module and a sensor; the open type mutual inductor is arranged on the outer wall of the cable to obtain induced current and is connected with the power supply module; the power supply module is respectively connected with the host, the 4G DTU module and the sensor, and the host is also respectively connected with the 4G DTU module and the sensor; the power supply module is used for carrying out voltage conversion and rectification on the induced current obtained by the open type current transformer to obtain stable voltage output and providing a low-voltage power supply for the system; the 4GDTU module is used for realizing bidirectional transparent data transmission from a serial port to a network, and transmitting data to a server through setting; the sensor is used for carrying out real-time online monitoring on the edge degradation product. The insulation state on-line monitoring system applied to the 10KV cable distribution box is characterized in that the host comprises an embedded processor, a power socket and an RS232 interface; the number of the RS232 interfaces is two, namely an RS232 interface I and an RS232 interface II; the power socket is connected with the power module, the RS232 interface is connected with the embedded processor and the sensor respectively, and the RS232 interface is connected with the embedded processor and the 4G DTU module respectively.
The insulation state on-line monitoring system applied to the 10KV cable distribution box comprises a host, a display screen and a key, wherein the key and the display screen are respectively connected with an embedded processor, and the display screen is used for realizing real-time display of data.
The insulation state on-line monitoring system applied to the 10KV cable distribution box is characterized in that the display screen is an a-TFT color screen.
The insulation state on-line monitoring system applied to the 10KV cable distribution box is characterized in that the inner side face of the open type current transformer is parallel to the outer vertical face of the cable when the open type current transformer is installed, and the open type current transformer is connected with a power supply module through a wire.
The insulation state on-line monitoring system applied to the 10KV cable distribution box is characterized in that the power supply module is respectively connected with the host, the sensor and the 4G DTU module through leads.
The insulation state on-line monitoring system applied to the 10KV cable distribution box is characterized in that the open type current transformer is matched with the power supply module to provide stable DC12V voltage output for the system, and the system has overvoltage protection and undervoltage protection functions.
The insulation state on-line monitoring system applied to the 10KV cable distribution box is characterized in that the sensor detects insulation degradation products of the 10KV cable distribution box and transmits acquired data to the embedded processor through the RS232 interface I.
The insulation state on-line monitoring system applied to the 10KV cable distribution box is characterized in that the sensor transmits an electric signal to the embedded processor.
Has the advantages that: the invention can realize the real-time monitoring of the insulation degradation state of the 10KV cable distribution box; and the insulation degradation product is monitored in real time by adopting an online monitoring mode, so that the timeliness and the accuracy of monitoring are ensured. The system has high monitoring accuracy on insulation faults, the system runs stably, and the system runs for a long time in one-time installation and is free of maintenance.
Drawings
Fig. 1 is a block diagram of the mechanism of the present invention.
Fig. 2 is a block diagram of an embodiment of the present invention.
Fig. 3 is a block diagram of a host architecture of the present invention.
FIG. 4 is a block diagram of an embodied structure of an embodiment of the present invention.
In the figure: the intelligent control system comprises an open type current transformer 1, a power supply module 2, a host 3, a 4G DTU module 4, a sensor 5, a server 6, an embedded processor 30, a power supply socket 31, an RS232 interface 32, a display screen 33, a key 34, a first RS232 interface 320 and a second RS232 interface 321.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 1 to 4, the present invention discloses an insulation state on-line monitoring system applied to a 10KV cable distribution box, which comprises: the system comprises an open type current transformer 1, a power supply module 2, a host 3, a 4G DTU module 4 and a sensor 5; the open type mutual inductor 1 is arranged on the outer wall of a cable (not shown) to obtain induced current and is connected with the power supply module 2; the power module 2 is respectively connected with a host 3, a 4G DTU module 4 and a sensor 5, and the host 3 is also respectively connected with the 4G DTU module 4 and the sensor 5; the power supply module 2 is used for carrying out voltage conversion and rectification on the induced current obtained by the open type current transformer 1 to obtain stable voltage output and providing a low-voltage power supply for the system; the 4G DTU module 4 is used for realizing bidirectional transparent data transmission from a serial port to a network, and transmitting data to a designated server through setting; the sensor 5 is used for carrying out real-time online monitoring on the edge degradation product.
Dtu (data Transfer unit), data Transfer unit: the wireless terminal device is specially used for converting serial port data into IP data or converting the IP data into the serial port data and transmitting the serial port data through a wireless communication network. The 4G DTU means a data transmission unit of the 4G network.
The open type current transformer 1 and the power module 2 are matched for use to provide stable DC12V voltage output for the system, and the open type current transformer has the functions of overvoltage protection and undervoltage protection. Because the power module 2 can provide stable 12V direct current voltage output for the system, the stability of system operation and the accuracy of monitoring are ensured, and the aim of one-time installation, long-term operation and maintenance-free is achieved.
In actual use, open type current transformer 1 is fixed in the cable outer wall, and power module 2, 4G DTU module 4, host computer 3, sensor 5 install on the inside lateral wall of distribution box (not drawn), but according to the nimble mounted position of selecting of distribution box particular case. The sensor 5 is arranged on the side wall in the tapping box and is arranged close to the upper part as much as possible on the premise of not influencing the closing of the cover plate. Coil outgoing lines of the open type current transformer 1 are connected to the terminals of the power supply modules S1 and S2 without being divided into positive and negative poles, and Vo + and Gnd are respectively connected to the positive pole and the negative pole of each module.
After the structure is adopted, the open type mutual inductor 1 acquires induced current from the outer wall of the cable, then the induced current is conveyed to the power supply module 2, the power supply module 2 carries out voltage conversion on the induced current, the induced current is converted into required voltage, and the voltage is stably output to supply power to a system after rectification; the power supply module 2 supplies power to the host 3, the 4G DTU module 4 and the sensor 5 respectively to ensure respective operation. The sensor 5 can perform real-time online detection on the insulation degradation product, transmits acquired data to the host 3 in real time, and transmits the data to the server through the 4G DTU module 4 after being processed by the host 3. Therefore, the invention realizes the real-time monitoring of the insulation degradation state of the 10KV cable distribution box and ensures the timeliness and the accuracy of the monitoring; the monitoring continuity and accuracy are realized, the monitoring result can be fed back in time, and the maintenance personnel can handle the fault in time.
Preferably, the host 3 comprises an embedded processor 30, a power socket 31 and an RS232 interface 32; the number of the RS232 interfaces 32 is two, namely a first RS232 interface 320 and a second RS232 interface 321; the power socket 31 is connected with the power module 2, the RS232 interface I320 is respectively connected with the embedded processor 30 and the sensor 5, and the RS232 interface II 321 is respectively connected with the embedded processor 30 and the 4G DTU module 4.
After the structure is adopted, the second RS232 interface 321 is connected with the 4G DTU module 4 through an RS232 data line, and the first RS232 interface 320 is connected with the sensor 5 through an RS232 data line to realize a communication function. Therefore, the 4G DTU module 4 and the sensor 5 are connected with the host 3 for real-time communication in an RS232 communication manner, so that the collected data can be transmitted to the host 3 in time, and the data processed by the embedded processor 30 can be transmitted to the server. High-speed conversion processing of data can be realized by the embedded processor 30.
Preferably, the host 3 further includes a display 33 and a key 34, the key 34 and the display 33 are respectively connected to the embedded processor 30, and the display 33 is used for displaying data in real time, so that clear data display can be obtained through the display 33, and the operation of the system can be realized through the key 34.
Preferably, the display screen 33 is an a-TFT color screen.
In practical use, when the open type current transformer 4 is installed, the inner side face is parallel to the outer vertical face of the cable, and the open type current transformer is connected with the power module 2 through a lead.
Specifically, the power module 2 is connected with the host 3, the sensor 5 and the 4G DTU module 4 through wires respectively.
Specifically, the sensor 5 detects insulation degradation products of the 10KV cable distribution box, and transmits the acquired data to the embedded processor 30 through the RS232 interface one 320.
In particular, the sensor 5 delivers an electrical signal to the embedded processor 30.
The invention can realize the real-time monitoring of the insulation degradation state of the 10KV cable distribution box, and the real-time monitoring of the insulation degradation product is realized by adopting an online monitoring mode, so that the timeliness and the accuracy of the monitoring are ensured; the system has high monitoring accuracy on insulation faults, the system runs stably, and the system runs for a long time in one-time installation and is free of maintenance.
The above is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, modifications or equivalent substitutions of the technical solution of the present invention without inventive work may be made without departing from the scope of the present invention.
Claims (9)
1. The utility model provides an insulating state on-line monitoring system who is applied to 10KV cable distribution box which characterized in that includes: the system comprises an open type current transformer, a power supply module, a host, a 4G DTU module and a sensor; the open type mutual inductor is arranged on the outer wall of the cable to obtain induced current and is connected with the power supply module; the power supply module is respectively connected with the host, the 4G DTU module and the sensor, and the host is also respectively connected with the 4G DTU module and the sensor; the power supply module is used for carrying out voltage conversion and rectification on the induced current obtained by the open type current transformer to obtain stable voltage output and providing a low-voltage power supply for the system; the 4G DTU module is used for realizing bidirectional transparent data transmission from a serial port to a network, and transmitting data to a server through setting; the sensor is used for carrying out real-time online monitoring on the edge degradation product.
2. The system for monitoring the insulation state of a 10KV cable distribution box according to claim 1, wherein the host comprises an embedded processor, a power socket and an RS232 interface; the number of the RS232 interfaces is two, namely an RS232 interface I and an RS232 interface II; the power socket is connected with the power module, the RS232 interface is connected with the embedded processor and the sensor respectively, and the RS232 interface is connected with the embedded processor and the 4G DTU module respectively.
3. The system for monitoring the insulation state of the 10KV cable distribution box on line according to claim 2, wherein the host further comprises a display screen and a key, the key and the display screen are respectively connected with the embedded processor, and the display screen is used for displaying data in real time.
4. The system for monitoring the insulation state of a 10KV cable distribution box according to claim 3, wherein the display screen is an a-TFT color screen.
5. The system for monitoring the insulation state of the 10KV cable distribution box according to claim 1, wherein the open-type current transformer is installed with its inner side surface parallel to the outer vertical surface of the cable and connected to the power module through a wire.
6. The system for monitoring the insulation state of the 10KV cable distribution box on line as claimed in claim 1, wherein the power module is connected with the host, the sensor and the 4G DTU module through wires respectively.
7. The system according to claim 1, wherein the open-type current transformer is used in combination with a power module to provide a stable DC12V voltage output for the system, and has functions of overvoltage protection and undervoltage protection.
8. The system of claim 2, wherein the sensor detects insulation degradation products of the 10KV cable distribution box and transmits the collected data to the embedded processor through a first RS232 interface.
9. The system of claim 8, wherein the sensor transmits an electrical signal to the embedded processor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111513351.9A CN114184916A (en) | 2021-12-09 | 2021-12-09 | Insulation state on-line monitoring system applied to 10KV cable distribution box |
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| CN202111513351.9A CN114184916A (en) | 2021-12-09 | 2021-12-09 | Insulation state on-line monitoring system applied to 10KV cable distribution box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114866550A (en) * | 2022-05-16 | 2022-08-05 | 云南电网有限责任公司瑞丽供电局 | Environment parameter and insulation fault early warning on-line monitoring system applied to ring main unit |
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2021
- 2021-12-09 CN CN202111513351.9A patent/CN114184916A/en active Pending
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| CN101975914A (en) * | 2010-10-19 | 2011-02-16 | 华中科技大学 | On-line monitoring method and device for insulating state of power cable |
| CN103995220A (en) * | 2014-05-27 | 2014-08-20 | 太原理工大学 | Mining high-voltage cable insulation state online monitoring system |
| CN104407270A (en) * | 2014-12-04 | 2015-03-11 | 国家电网公司 | Online fault monitoring device for cable connector in 10-35kV power distribution network and method for evaluating system state |
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| CN114866550A (en) * | 2022-05-16 | 2022-08-05 | 云南电网有限责任公司瑞丽供电局 | Environment parameter and insulation fault early warning on-line monitoring system applied to ring main unit |
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