CN110940642A - Gas detection system and detection method for high-low voltage switch cabinet - Google Patents
Gas detection system and detection method for high-low voltage switch cabinet Download PDFInfo
- Publication number
- CN110940642A CN110940642A CN201911286190.7A CN201911286190A CN110940642A CN 110940642 A CN110940642 A CN 110940642A CN 201911286190 A CN201911286190 A CN 201911286190A CN 110940642 A CN110940642 A CN 110940642A
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- Prior art keywords
- switch cabinet
- low voltage
- voltage switch
- gas
- gas detection
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- 238000001514 detection method Methods 0.000 title claims abstract description 45
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 2
- 238000012360 testing method Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
-
- 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
- G01R31/1227—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 of components, parts or materials
- G01R31/1263—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 of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1281—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 of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of liquids or gases
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention discloses a gas detection system of a high-low voltage switch cabinet, which comprises a gas detection module and a microprocessor which are arranged in the high-low voltage switch cabinet, wherein a display and an alarm are arranged on the outer side surface of the high-low voltage switch cabinet, the gas detection module is connected with the microprocessor through a signal wire, and the microprocessor is connected with the display, the alarm and a power supply module. The invention also discloses a detection method of the gas detection system of the high-low voltage switch cabinet, the gas detection module is adopted to detect the gas concentration in the high-low voltage switch cabinet in real time, the detected gas concentration is transmitted to the microprocessor, when the detected gas concentration is higher than the preset value, the microprocessor drives the alarm to give an alarm, and simultaneously the power switch of the high-low voltage switch cabinet is switched off, the detection result has higher accuracy, the high-low voltage switch cabinet can be protected in time, and the occurrence of safety accidents of the high-low voltage switch cabinet is reduced.
Description
Technical Field
The invention belongs to the technical field of power device detection, and relates to a gas detection system and a gas detection method for a high-low voltage switch cabinet.
Background
The high-low voltage switch cabinet is a device for connecting high-voltage or low-voltage cables as the name implies, a high-voltage cabinet is used by a common power supply station and a substation, the high-voltage cabinet is subjected to voltage reduction by a transformer and then enters a low-voltage cabinet, the low-voltage cabinet enters each power distribution box, and protective devices such as switch breakers and the like are assembled into an integrated electrical device without the inside.
When the contact of the knife switch contact in the high-voltage switch cabinet and the joints of the power cable inlet and outlet wires is poor, the contact resistance is increased, the heating phenomenon can be generated when the load current flows, the mechanical strength of a metal material is reduced due to overheating, and the insulation material is aged and can cause breakdown to form accidents. In a high-voltage switch cabinet, a cavity in solid insulation, an insulating layer with different characteristics and a sharp edge of a metal (or semi-conductive) electrode are prone to generate partial discharge at a position of an air gap because the breakdown field strength of gas is much lower than that of solid medium and the electric field in the gas is higher than that of the solid medium. These partial discharges can cause a gradual reduction in the dielectric strength and ultimately lead to a breakdown of the insulation.
Furthermore, there is also a leakage of SF6 gas in the high voltage switchgear cabinet, which also causes a reduction in the performance of the equipment. Therefore, the method for measuring and monitoring the running state in the high-voltage switch cabinet is a powerful means for avoiding major accidents and controlling fault deterioration, and has very important significance for ensuring the normal running of the high-voltage switch cabinet and improving the running reliability and the automation degree of a power system.
There is a variety of faults in high voltage switchgear, such as contact overheating, partial discharge, SF6 leakage, and other abnormal conditions.
At present, a test instrument of an existing high-voltage switch cabinet is controlled by the running state of the high-voltage switch cabinet when detecting, and for the switch cabinet which does not execute the breaking and closing actions for a long time, corresponding test components cannot be obtained, so that the test instrument is not suitable for the switch cabinet which does not execute the breaking and closing actions for a long time. The detection is easily affected by external test conditions, so that the measurement accuracy is not enough.
Disclosure of Invention
The invention aims to provide a gas detection system of a high-low voltage switch cabinet, which solves the problem of low accuracy of measurement results of the existing gas detection system of the high-low voltage switch cabinet.
The invention further aims to provide a detection method of the gas detection system of the high-low voltage switch cabinet.
The invention adopts a first technical scheme that the gas detection system of the high-low voltage switch cabinet comprises a gas detection module and a microprocessor which are arranged in the high-low voltage switch cabinet, a display and an alarm are arranged on the outer side surface of the high-low voltage switch cabinet, the gas detection module is connected with the microprocessor through a signal line, and the microprocessor is connected with the display, the alarm and a power supply module.
The present invention is also technically characterized in that,
the gas detection module is a carbon monoxide gas sensor.
The gas detection module is a carbon dioxide gas sensor.
And the power module is provided with a power-off switch.
According to the second technical scheme, the gas detection method of the high-low voltage switch cabinet comprises the steps that the gas detection module is adopted to detect the gas concentration in the high-low voltage switch cabinet in real time, the detected gas concentration is transmitted to the microprocessor, and when the detected gas concentration is higher than a preset value, the microprocessor drives the alarm to give an alarm and simultaneously turns off a power switch of the high-low voltage switch cabinet.
The invention has the advantages that the gas detection module is adopted to detect the gas concentration in the high-low voltage switch cabinet in real time, the detected gas concentration is transmitted to the microprocessor, when the detected gas concentration is higher than the preset value, the microprocessor drives the alarm to give an alarm, and simultaneously the power switch of the high-low voltage switch cabinet is switched off, so that the detection result has higher accuracy, the high-low voltage switch cabinet can be protected in time, and the occurrence of safety accidents of the high-low voltage switch cabinet is reduced.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The invention discloses a gas detection system of a high-low voltage switch cabinet, which comprises a gas detection module and a microprocessor which are arranged in the high-low voltage switch cabinet, wherein a display and an alarm are arranged on the outer side surface of the high-low voltage switch cabinet, the gas detection module is connected with the microprocessor through a signal wire, and the microprocessor is connected with the display, the alarm and a power supply module.
The gas detection module is an infrared carbon dioxide gas sensor, the infrared carbon dioxide gas sensor uses a broad-spectrum light source as the light source of the infrared sensor, and light passes through the gas to be detected in the light path, penetrates through the narrow-band filter and reaches the infrared detector. The working principle of the gas sensing device is that the absorption characteristics are selected based on the near infrared spectra of different gas molecules, and the gas components are identified and the concentration of the gas components is determined by utilizing the relation (Lambert-Beer law) between the gas concentration and the absorption intensity. The infrared detector mainly comprises an infrared light source, a light path, an infrared detector, a circuit and a software algorithm.
And the power module is provided with a power-off switch.
The detection method of the gas detection system of the high-low voltage switch cabinet comprises the steps of adopting a gas detection module to detect the gas concentration in the high-low voltage switch cabinet in real time, namely adopting a carbon dioxide gas sensor to monitor CO in the high-low voltage switch cabinet in real time2Gas concentration, and CO to be detected2The gas concentration is transmitted to a microprocessor for detection of CO2When the gas concentration is higher than the preset value, the microprocessor drives the alarm to give an alarm, and simultaneously, a power switch of the high-low voltage switch cabinet is switched off.
Because a plurality of electrical components are arranged in the high-low voltage switch cabinet, the electrical components generally consist of an internal circuit and a shell, the shell is generally made of plastic or rubber materials, the electrical components can generate heat after being used for a period of time, the shell can be heated and can be burnt out when serious, and CO is released2Gas to make CO in high-low voltage switch cabinet2The gas concentration is increased, so that the real-time monitoring of CO in the high-low voltage switch cabinet is realized2The gas concentration can discover abnormal conditions in the high-low voltage switch cabinet in time, protect the abnormal conditions in time and avoid the occurrence of unfavorable conditions such as fire, explosion and the like.
Claims (5)
1. The utility model provides a gaseous detecting system of high-low voltage switch cabinet, its characterized in that includes sets up gaseous detection module and microprocessor in high-low voltage switch cabinet, sets up display and alarm on high-low voltage switch cabinet lateral surface, and gaseous detection module passes through the signal line and is connected with microprocessor, and microprocessor connects display, alarm and power module.
2. The gas detection system of the high-low voltage switch cabinet as claimed in claim 1, wherein the gas detection module is a carbon monoxide gas sensor.
3. The gas detection system of the high-low voltage switch cabinet as claimed in claim 1, wherein the gas detection module is a carbon dioxide gas sensor.
4. The gas detection system of the high-low voltage switch cabinet as claimed in claim 1, wherein a power-off switch is installed on the power module.
5. The gas detection method of the high-low voltage switch cabinet is characterized in that a gas detection module is adopted to detect the gas concentration in the high-low voltage switch cabinet in real time and transmit the detected gas concentration to a microprocessor, and when the detected gas concentration is higher than a preset value, the microprocessor drives an alarm to give an alarm and simultaneously disconnects a power switch of the high-low voltage switch cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911286190.7A CN110940642A (en) | 2019-12-13 | 2019-12-13 | Gas detection system and detection method for high-low voltage switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911286190.7A CN110940642A (en) | 2019-12-13 | 2019-12-13 | Gas detection system and detection method for high-low voltage switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110940642A true CN110940642A (en) | 2020-03-31 |
Family
ID=69910673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911286190.7A Pending CN110940642A (en) | 2019-12-13 | 2019-12-13 | Gas detection system and detection method for high-low voltage switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110940642A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968459A (en) * | 2010-08-23 | 2011-02-09 | 上海市电力公司超高压输变电公司 | Detection method and detection device of internal faults of switch cabinet |
| US8319182B1 (en) * | 2010-07-27 | 2012-11-27 | The Boeing Company | Methods and systems for using IR spectroscopy to quantify degradation of wiring insulation |
| CN104568012A (en) * | 2015-01-22 | 2015-04-29 | 常州太平洋电力设备(集团)有限公司 | Intelligent monitoring assembly system for high-voltage switch cabinet and working method of intelligent monitoring assembly system |
| CN105203929A (en) * | 2015-09-08 | 2015-12-30 | 武汉大学 | Fixed switch cabinet partial discharge online detection device and method |
| CN207096320U (en) * | 2017-07-20 | 2018-03-13 | 徐州市苏能供电工程有限公司 | A kind of intelligent monitoring device for power distribution network switch cubicle |
| CN207517630U (en) * | 2017-11-29 | 2018-06-19 | 南京紫金电力保护设备有限公司 | A kind of Novel alarming air switch |
| CN207528861U (en) * | 2017-11-15 | 2018-06-22 | 武汉大学 | A kind of status early warning device suitable for the detection of high-tension switch cabinet internal gas |
-
2019
- 2019-12-13 CN CN201911286190.7A patent/CN110940642A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8319182B1 (en) * | 2010-07-27 | 2012-11-27 | The Boeing Company | Methods and systems for using IR spectroscopy to quantify degradation of wiring insulation |
| CN101968459A (en) * | 2010-08-23 | 2011-02-09 | 上海市电力公司超高压输变电公司 | Detection method and detection device of internal faults of switch cabinet |
| CN104568012A (en) * | 2015-01-22 | 2015-04-29 | 常州太平洋电力设备(集团)有限公司 | Intelligent monitoring assembly system for high-voltage switch cabinet and working method of intelligent monitoring assembly system |
| CN105203929A (en) * | 2015-09-08 | 2015-12-30 | 武汉大学 | Fixed switch cabinet partial discharge online detection device and method |
| CN207096320U (en) * | 2017-07-20 | 2018-03-13 | 徐州市苏能供电工程有限公司 | A kind of intelligent monitoring device for power distribution network switch cubicle |
| CN207528861U (en) * | 2017-11-15 | 2018-06-22 | 武汉大学 | A kind of status early warning device suitable for the detection of high-tension switch cabinet internal gas |
| CN207517630U (en) * | 2017-11-29 | 2018-06-19 | 南京紫金电力保护设备有限公司 | A kind of Novel alarming air switch |
Non-Patent Citations (1)
| Title |
|---|
| 李如虎 等: "《三电工作实用手册 第1版》", 31 August 1997 * |
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Application publication date: 20200331 |
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