CN213903763U - External type partial discharge real-time on-line monitoring positioning device - Google Patents
External type partial discharge real-time on-line monitoring positioning device Download PDFInfo
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- CN213903763U CN213903763U CN202023144576.5U CN202023144576U CN213903763U CN 213903763 U CN213903763 U CN 213903763U CN 202023144576 U CN202023144576 U CN 202023144576U CN 213903763 U CN213903763 U CN 213903763U
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Abstract
The utility model discloses an external partial discharge real-time on-line monitoring and positioning device, which comprises a switch cabinet, an earth electric wave sensor, a display device, an analog-to-digital converter and a microcomputer; the switch cabinet comprises a cable bin, the ground electric wave sensor is installed inside the cable bin and electrically connected with the analog-to-digital converter, the analog-to-digital converter is electrically connected with the microcomputer, the microcomputer is electrically connected with the display device, and the display device is installed on the outer wall of the switch cabinet. The utility model discloses the condition of discharging of electrical equipment in can real-time on-line monitoring cubical switchboard.
Description
Technical Field
The utility model belongs to the technical field of power equipment detects, concretely relates to external type partial discharge real-time on-line monitoring positioner.
Background
At present, field operation and maintenance personnel mainly use various types of handheld partial discharge testers to detect the insulation capacity and the insulation level of equipment in a switch cabinet. Generally, the detection work of the switch cabinet equipment needs to be performed at regular intervals once every year or two years, and along with the continuous expansion of the operation scale of the distribution network in the power system, the number of the equipment such as the switch cabinet is increased year by year, and the partial discharge detection work of various electrical equipment occupies a large amount of manpower and material resources, so that the detection technology needs to be further improved to improve the working efficiency and save the repeated working time. Due to the influence of factors such as operating environment, load condition, production process and the like, the time and the position of the electrical equipment where partial discharge occurs have great uncertainty, and operators cannot timely find the occurrence of problems such as partial discharge or creepage of a system, so that the insulation capacity and the insulation level of the electrical equipment are irreversibly damaged. If the partial discharge problem can not be found and processed in time, the stable operation capability and the service life of the electrical equipment can be greatly reduced, and even serious consequences such as insulation breakdown, equipment power failure and the like are caused.
In the detection work of partial discharge of the electrical equipment, field operators need to perform detailed analysis and processing on collected signals in all aspects and determine the position and the severity of the discharge equipment, so that the operators need to have strong professional analysis and evaluation capability. As a sealed electrified device, a switch cabinet is generally placed at a gap of a switch cabinet door when performing a partial discharge detection operation on the switch cabinet. However, electromagnetic or ultrasonic signals emitted by the partial discharge phenomenon may be weak, the signals are transmitted through the gaps of the sealed electrical equipment, a part of the whole process is reflected and absorbed by various propagation media to cause sharp reduction of signal energy, and some partial discharge phenomena which are difficult to find may be directly ignored. On-site operation maintainers cannot timely and accurately detect the discharging condition inside the switch cabinet, and the accuracy of manual detection cannot be guaranteed. Meanwhile, signals such as electromagnetic waves or ultrasonic waves caused by partial discharge are easily influenced by noise of the external environment in the process of superposition and propagation of the signals and media such as air and metal equipment, and different media properties, media states and the external environment have great influence on an actual detection result, so that misjudgment or missing judgment of the partial discharge detection result is caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an external type partial discharge real-time on-line monitoring positioner to the problem of missing judgement or erroneous judgement appears easily in the partial discharge signal detection among the solution prior art.
In order to realize the purpose, the following technical scheme is adopted:
an external type partial discharge real-time online monitoring and positioning device comprises: the switch cabinet, the earth electric wave sensor, the display device, the analog-to-digital converter and the microcomputer;
the switch cabinet comprises a cable bin, the ground electric wave sensor is installed inside the cable bin and electrically connected with the analog-to-digital converter, the analog-to-digital converter is electrically connected with the microcomputer, the microcomputer is electrically connected with the display device, and the display device is installed on the outer wall of the switch cabinet.
Preferably, the microcomputer includes a memory module and a microprocessor; the microprocessor is electrically connected with the analog-to-digital converter and the storage module respectively.
Preferably, the microcomputer is further electrically connected with a DTU device.
Preferably, the DTU device is communicatively connected to a background master station device.
Preferably, the earth electric wave sensor is adsorbed on the inner wall of the cable chamber of the switch cabinet by adopting a magnet.
Preferably, the display device is an LED display screen.
Preferably, the microcomputer is connected with the display device through a serial port network cable, and two ends of the serial port network cable are respectively connected with an aviation plug.
Preferably, the serial port network cable is a shielding cable.
Preferably, the device also comprises an operational amplifier and a voltage signal acquisition module;
a plurality of switch cabinets are arranged in the same station room, and earth electric wave sensors in the switch cabinets are respectively and simultaneously electrically connected with the voltage signal acquisition module;
the voltage signal acquisition module is electrically connected with the operational amplifier, the operational amplifier is electrically connected with the analog-to-digital converter, and the analog-to-digital converter is electrically connected with the microcomputer.
Preferably, the voltage signal acquisition module is connected to the ground electric wave sensor through a shielded wire.
Compared with the prior art, the utility model discloses following technological effect has:
1. the utility model discloses the condition of discharging of electrical equipment in can real-time on-line monitoring cubical switchboard will discharge the condition and directly reflect on display device, can reflect the equipment in real time discharge and the insulating condition, avoid damaging or having a power failure because of insulating the equipment that causes of losing.
2. The utility model discloses can realize electrical equipment partial discharge's detection on the spot, periodic partial discharge and insulating detection experiment can be removed from, a large amount of manpower resources and time input are saved.
3. The utility model discloses can obtain the numerical value of the transient state after the capacitive coupling that the earth electric wave sensor who disposes in the cubical switchboard detected to the ground voltage to confirm the specific position of discharging of electrical equipment and the severity of discharging, make on-the-spot maintenance and locate to lack and have more corresponding, the time that the power failure that furthest reduces partial discharge and insulating properties and detects overhauls.
4. The utility model discloses can pass through DTU equipment with microprocessor's data and upload to backstage main website equipment, realize the real-time on-line monitoring to the partial discharge condition in all cubical switchboard.
5. The utility model discloses a display device adopts the external form that is independent of primary equipment, and the at utmost has avoided leading to the fact a power failure problem because of the device overhauls or upgrades.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a first embodiment of the present invention;
fig. 2 is a schematic view illustrating an installation of a display device according to a first embodiment of the present invention;
fig. 3 is a schematic view illustrating an installation of a ground electric wave sensor according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of a second embodiment of the present invention;
wherein: 1-a switch cabinet; 101-a cable compartment; 2-ground electric wave sensor; 3-a display device; 4-an operational amplifier; 5-DTU equipment; 6-a storage module; 7-an analog-to-digital converter; 8-a voltage signal acquisition module; 9-background master station device; 10-a microprocessor; 11-aviation plug.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention.
The embodiment of the utility model provides an external type partial discharge real-time on-line monitoring positioner, discharge signal in can the accurate identification cubical switchboard, on-the-spot fortune dimension personnel need not regularly to carry out partial discharge and insulation level's detection to all switchgear, has saved a large amount of manpowers and time cost, has greatly improved the work efficiency of operation and the validity of work.
Example one
As shown in fig. 1 to 3, an external local discharge real-time on-line monitoring and positioning device includes: the switch cabinet comprises a switch cabinet 1, a ground electric wave sensor 2, a display device 3, an analog-to-digital converter 7 and a microcomputer, wherein the display device 3 is arranged on the outer wall of the switch cabinet 1; the switch cabinet 1 comprises a cable bin 101, a switch bin, a secondary bin and other areas, and the earth electric wave sensor 2 is adsorbed inside the cable bin 101 by adopting a magnet. The microcomputer comprises a memory module 6 and a microprocessor 10.
The earth electric wave sensor 2 is electrically connected with the analog-to-digital converter 7, the analog-to-digital converter 7 is electrically connected with the microprocessor 10, the microprocessor 10 is respectively electrically connected with the analog-to-digital converter 7, the storage module 6, the DTU equipment 5 and the display device 3, and the DTU equipment 5 is in communication connection with the background master station equipment 9. The earth electric wave sensor 2 is used for collecting partial discharge signals in the switch cabinet 1 and sending the partial discharge signals to the microcomputer through the analog-to-digital converter 7. Because the cable part that the probability ratio is great is taken place for the partial discharge problem, so this embodiment adopts magnet direct absorption inside cable chamber 101 with earth electric wave sensor 2, realizes detecting the insulating properties to electric elements such as cable, circuit breaker, isolator, earthing switch, current transformer, voltage transformer in cubical switchboard 1. The method of arranging the earth electric wave sensor 2 in the switch cabinet 1 can effectively reduce the noise interference of external electromagnetic wave and other type signals, reduce the attenuation of electromagnetic wave transmission energy and improve the accuracy of partial discharge detection and positioning. The earth electric wave sensor 2 may be installed inside the cable compartment 101, or may be disposed in a switch compartment, a secondary compartment, or the like, so as to extend the monitoring coverage of partial discharge.
The display device 3 is an LED display screen and is used for displaying specific numerical values of corresponding discharge quantities in the partial discharge state of the switch cabinet 1 and directly and quantitatively representing the real-time situation of partial discharge of the electrical equipment, so that on-site operation and maintenance personnel can visually know the specific position and severity of the partial discharge. This LED display screen adopts the mounting means who is independent of cubical switchboard 1, arranges in on the outside lateral wall of cubical switchboard 1 to adopt aviation plug 11 and serial ports net twine and microcomputer to be connected, serial ports net twine one end is passed through aviation plug 11 and is pegged graft display device 3, and the serial ports net twine is the shielded wire. In this embodiment, the analog-to-digital converter 7 is ADC 0831; the microprocessor 10 adopts an AT89C2051 processor with the model number having the signal discrimination function; the memory module 6 employs PCF8582 memory.
Example two
As shown in fig. 4, the second embodiment is different from the first embodiment in that the second embodiment further includes an operational amplifier 4 and a voltage signal acquisition module 8; a plurality of switch cabinets 1 are arranged in the same station room, and earth electric wave sensors in the switch cabinets 1 are respectively and electrically connected with a voltage signal acquisition module 8 through shielding wires; the voltage signal acquisition module 8 is electrically connected with the operational amplifier 4, the operational amplifier 4 is electrically connected with the analog-to-digital converter 7, and the analog-to-digital converter 7 is electrically connected with the microprocessor 10 of the microcomputer. The microprocessor 10 can recognize the ground wave sensor in which the transient voltage to ground is highest, and display the recognition result and the corresponding transient voltage to ground on the display device 3 while transmitting to the DTU device 5.
In this embodiment, the operational amplifier 4 has signal amplification and comparison functions, and is an ICL7650 operational amplification loop and its peripheral circuits; the voltage signal acquisition module 8 adopts a signal acquisition circuit with the type of ADAS3023 and a peripheral circuit thereof; it should be noted that, the selection of components in this embodiment is the integrated circuit module in the prior art, including but not limited to the model listed in this embodiment, and components and parts that other models can realize the same function also belong to the protection scope of the present invention.
The voltage signal acquisition module 8 in this embodiment can screen out a sudden change value of the transient voltage to ground, which is different from the background noise, and the value of this part of the sudden change value correspondingly reflects the electromagnetic wave energy released when the electrical equipment is subjected to partial discharge, so that this part can effectively avoid the interference of the background noise on the partial discharge detection result.
The operational amplifier 4 in this embodiment can amplify the ground electric wave signal collected in proportion to improve the accuracy of signal collection, and avoid the occurrence of the problems of partial discharge identification and detection false alarm at the maximum. After data of different electric wave sensors are interactively compared in the operational amplifier 4, the ground electric wave sensor with larger discharge capacity is judged, so that the corresponding switch cabinet 1 and the position of the switch cabinet corresponding to the specific discharge point are known, the display device 3 displays the position of the switch cabinet with specific discharge, the high-voltage discharge signal in the equipment can be acquired and distinguished in real time, and reliable data reference and alarm prompt are provided for timely finding out the partial discharge problem in the switch equipment.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of the invention or which are equivalent to the scope of the invention are embraced by the invention.
Claims (10)
1. The utility model provides an external type partial discharge real-time on-line monitoring positioner which characterized in that includes: the system comprises a switch cabinet (1), an earth electric wave sensor (2), a display device (3), an analog-to-digital converter (7) and a microcomputer;
the switch cabinet (1) comprises a cable bin (101), the ground electric wave sensor (2) is installed inside the cable bin (101) and electrically connected with the analog-to-digital converter (7), the analog-to-digital converter (7) is electrically connected with the microcomputer, the microcomputer is electrically connected with the display device (3), and the display device (3) is installed on the outer wall of the switch cabinet (1).
2. The external partial discharge real-time on-line monitoring and positioning device according to claim 1, wherein the microcomputer comprises a memory module (6) and a microprocessor (10); the microprocessor (10) is electrically connected with the analog-to-digital converter (7) and the storage module (6) respectively.
3. The external partial discharge real-time on-line monitoring and positioning device according to claim 1, wherein the microcomputer is further electrically connected with a DTU (data transfer unit) device (5).
4. The external partial discharge real-time online monitoring and positioning device according to claim 3, wherein the DTU device (5) is communicatively connected with a background master station device (9).
5. The external partial discharge real-time online monitoring and positioning device according to claim 1, wherein the ground wave sensor (2) is attached to the inner wall of the cable chamber (101) of the switch cabinet (1) by a magnet.
6. The external partial discharge real-time online monitoring and positioning device according to claim 1, wherein the display device (3) is an LED display screen.
7. The external partial discharge real-time online monitoring and positioning device according to claim 1, wherein the microcomputer is connected to the display device (3) through a serial port network cable, and two ends of the serial port network cable are respectively connected to an aviation plug (11).
8. The external local discharge real-time on-line monitoring and positioning device according to claim 7, wherein the serial port network cable is a shielded cable.
9. The external partial discharge real-time online monitoring and positioning device according to claim 1, further comprising an operational amplifier (4) and a voltage signal acquisition module (8);
a plurality of switch cabinets (1) are arranged in the same station room, and earth electric wave sensors in the switch cabinets (1) are respectively and simultaneously electrically connected with the voltage signal acquisition module (8);
the voltage signal acquisition module (8) is electrically connected with the operational amplifier (4), the operational amplifier (4) is electrically connected with the analog-to-digital converter (7), and the analog-to-digital converter (7) is electrically connected with the microcomputer.
10. The external partial discharge real-time online monitoring and positioning device according to claim 9, wherein the voltage signal acquisition module (8) is connected to the ground electric wave sensor (2) through a shielded wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023144576.5U CN213903763U (en) | 2020-12-23 | 2020-12-23 | External type partial discharge real-time on-line monitoring positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023144576.5U CN213903763U (en) | 2020-12-23 | 2020-12-23 | External type partial discharge real-time on-line monitoring positioning device |
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| Publication Number | Publication Date |
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| CN213903763U true CN213903763U (en) | 2021-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023144576.5U Active CN213903763U (en) | 2020-12-23 | 2020-12-23 | External type partial discharge real-time on-line monitoring positioning device |
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| CN (1) | CN213903763U (en) |
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