CN110488163A - A kind of switchgear insulation defect detection system based on photon sensor - Google Patents
A kind of switchgear insulation defect detection system based on photon sensor Download PDFInfo
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- CN110488163A CN110488163A CN201910765270.4A CN201910765270A CN110488163A CN 110488163 A CN110488163 A CN 110488163A CN 201910765270 A CN201910765270 A CN 201910765270A CN 110488163 A CN110488163 A CN 110488163A
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- switchgear
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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
- G01R31/1218—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 using optical methods; using charged particle, e.g. electron, beams or X-rays
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Abstract
The present invention provides a kind of switchgear insulation defect detection system based on photon sensor, including sensor module, signal conditioning circuit module and terminal；Sensor module is installed in switch cabinet, for acquiring the temperature information of inside switch cabinet when switchgear operates normally；Signal conditioning circuit module, the order for providing according to terminal are detected and are screened to high-tension switch cabinet built-in electrical insulation situation；Temperature information after prescreening is transferred to terminal by communication unit by signal conditioning circuit module；Terminal passes through built-in center processor detection switch cabinet fault message.The present invention provides a kind of switchgear insulation defect detection system based on photon sensor, the high temperature generated when insulation defect occurs by detection switch cabinet judges switchgear with the presence or absence of insulation fault, switchgear is tested when detection without having a power failure, without changing switchgear operating status, have the advantages that fast response time, detectivity are high, detection efficiency is high.
Description
Technical field
The present invention relates to Electric Power Equipment Insulation detection technique and its application fields, and in particular to one kind is based on photon sensor
Switchgear insulation defect detection system.
Background technique
There is human factor, electrical effect, fuel factor and chemistry in longtime running and assembling process for high-tension switch cabinet
The factors such as effect will cause the insulation degradation of high-tension switch cabinet, electrical insulation strength caused to reduce, cause shelf depreciation, cause
Switchgear failure, or even stop transport, electric system normal operation is impacted.
The switchgear detection method being widely used at present with having hyperfrequency method, supercritical ultrasonics technology, transient state upstream band etc..Hyperfrequency
Although method has outstanding interference free performance, whole system is not perfect；Supercritical ultrasonics technology detection sensitivity is lower；Transient state ground electric wave
Method not can avoid a large amount of electromagnetic interferences at scene, these three methods have some limitations.
Summary of the invention
The present invention is not perfect in order to overcome existing detection method, and sensitivity is low, not can avoid a large amount of electromagnetic interferences at scene
The problem of, a kind of switchgear insulation defect detection system based on photon sensor is provided.
To realize the above goal of the invention, the technical solution adopted is that:
A kind of switchgear insulation defect detection system based on photon sensor, including switchgear, further include sensor die
Block, signal conditioning circuit module and terminal；The sensor module is arranged in the switchgear, with the signal conditioning circuit
Module wireless communication connection；The signal conditioning circuit module is arranged outside switchgear with the terminal and is built by electric signal
Vertical connection.
In above scheme, sensor module is mounted on to the inside of switch cabinet equipment when testing staff detects at the scene, passed
The result that sensor module will test is handled and is filtered by signal conditioning circuit module, and filtered information is transmitted to end
End, terminal detection switch cabinet fault message.When detecting that continuous three measured point temperature values are more than predetermined temperature, terminal is carried out
Alarm, and show the temperature value of fault point.
Preferably, the sensor module includes the first communication unit and photon sensor；Wherein: the photon sensor
Output end and the first communication unit input terminal are electrically connected；The first communication unit output end and signal condition electricity
The wireless communication connection of road module.
In above scheme, the sensor module is installed in switch cabinet, for acquiring when switchgear operates normally
The temperature information of inside switch cabinet, inside have photon sensor to be used to collecting signal, and the first communication unit is used to the letter that will be collected
It number transfers out.
Preferably, it is additionally provided with refrigeration unit in the switchgear, for maintaining the temperature of the sensor module.
In above scheme, refrigeration unit, for maintaining the temperature of the sensor module.
Preferably, the photon sensor is mercury cadmium telluride photon type infrared sensor.
In above scheme, mercury cadmium telluride photon type infrared sensor reception infrared radiation transmissions to signal conditioning circuit module,
To realize the measurement to temperature.
Preferably, the photon sensor includes the lens of germanium material, and lens material surface is coated with anti-reflection film.
In above scheme, germainium lens surface is coated with anti-reflection film, and transmitance reaches 85% or more, can effectively inhibit sunlight dry
It disturbs.
Preferably, the refrigeration unit uses semiconductor cooler.
In above scheme, the refrigeration unit uses semiconductor cooler, sensor die deblocking temperature can be maintained at -30 DEG C
~-32 DEG C, the sensitivity for keeping photon type infrared sensor and detectivity are in higher level.
Preferably, the signal conditioning circuit module includes multichannel amplifying circuit, filter circuit, power supply, microprocessor,
Two communication units and third communication unit；Wherein:
The second communication unit input terminal and the first communication unit output end wireless communication connect；
The second communication unit output end and the multichannel input amplifier are electrically connected；
The multichannel amplification circuit output end and the filter circuit input terminal are electrically connected；
The filter circuit output end and the microprocessor input are electrically connected；
The output end of microprocessor and the third communication unit input terminal are electrically connected；
The third communication unit output end and the terminal are electrically connected, and realize information exchange；
The power supply is the microprocessor power supply.
In above scheme, the signal conditioning circuit module, the order for being provided according to terminal, in high-tension switch cabinet
Portion's insulation situation is detected；The multichannel amplifying circuit and filter circuit amplify the signal that sensor module detects
With filtering, microprocessor carries out prescreening to the inside switch cabinet temperature information that sensor module measures；The signal condition electricity
Road module receives temperature information by the second communication unit and the information after prescreening is transferred to end by third communication unit
End.
Preferably, the terminal includes fourth communication unit, shell and setting in the intracorporal center processor of shell, storage electricity
Road unit and display circuit unit；Wherein: the fourth communication unit receives the pretreated of the third communication unit
Signal, and be sent to the center processor, the memory circuit cells and the display circuit unit respectively with it is described in
Heart processor is electrically connected；The shell uses epoxy resin material.
In above scheme, the temperature information after prescreening is transferred in center processor by fourth communication unit
Reason, measured point temperature data can be stored, be checked at any time for administrative staff by the memory circuit cells, if temperature in cabinet
Past due alarm temperature, the temperature of monitoring point can be shown in display circuit unit in real time in cabinet.
In above scheme, a kind of switchgear insulation defect detection system based on photon sensor, including sensor module,
Signal conditioning circuit module and terminal；The sensor module is installed in switch cabinet, for when switchgear operates normally
The temperature information of inside switch cabinet is acquired, there are photon sensor, refrigeration unit and the first communication unit in inside；The photon sensing
Device is mercury cadmium telluride photon type infrared sensor；Lens material in the photon sensor is germanium, and lens surface be coated with it is anti-reflection
Film, transmitance reach 85% or more, effectively sunlight can be inhibited to interfere；The refrigeration unit uses semiconductor cooler, can incite somebody to action
Sensor die deblocking temperature is maintained at -30 DEG C~-32 DEG C, and the sensitivity for keeping photon type infrared sensor and detectivity are compared with Gao Shui
It is flat；The signal conditioning circuit module include the second communication unit, multichannel amplifying circuit, filter circuit, power supply, microprocessor and
Third communication unit, the order for providing according to terminal detect high-tension switch cabinet built-in electrical insulation situation；The multichannel
The signal that sensor exports is amplified, is filtered by amplifying circuit and filter circuit, is converted into later proportional to infra-red radiation
Voltage signal, to realize measurement to temperature, the microprocessor is for transmitting the data that photon sensor measures
Preceding prescreening, if the temperature value of measured point is lower than predetermined filtering temperature, then it is assumed that there is no insulation defects for this point, abandon this
Temperature information after prescreening is transferred to terminal by third communication unit by point data, the signal conditioning circuit module；Institute
Stating terminal includes fourth communication unit, shell, center processor, memory circuit cells, display circuit unit, center processor,
Memory circuit cells and the setting of display circuit unit are inside the shell；The terminal obtains the temperature of measured point by fourth communication unit
After spending information, center processor carries out secondary treatment to data；If the temperature past due alarm temperature of continuous three measured points,
Then terminal will be alarmed by sound, light mode, and the temperature value of the real-time display point；The memory circuit cells can will be by
Measuring point temperature data is stored, and is checked at any time for administrative staff.
Compared with prior art, the beneficial effects of the present invention are:
The high temperature that the present invention generates when insulation defect occurs by detection switch cabinet judges switchgear with the presence or absence of insulation event
Barrier, tested switchgear, without changing switchgear operating status, has fast response time, detectivity without having a power failure when detection
Advantage high, detection efficiency is high.
Detailed description of the invention
Fig. 1 is module connection diagram of the invention；
Description of symbols: 1, sensor module；2, signal conditioning circuit module；3, terminal；11, the first communication unit；
12, photon sensor；20, multichannel amplifying circuit；21, filter circuit；22, power supply；23, microprocessor；24, the second communication unit
Member；25, third communication unit；30, fourth communication unit；31, shell；32, center processor；33, memory circuit cells；34,
Display circuit unit.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
Below in conjunction with drawings and examples, the present invention is further elaborated.
Embodiment 1
As shown in Figure 1, a kind of switchgear insulation defect detection system based on photon sensor, including switchgear, also wrap
Include sensor module 1, signal conditioning circuit module 2 and terminal 3；The sensor module 1 is arranged in the switchgear, with institute
State the wireless communication connection of signal conditioning circuit module 2；The signal conditioning circuit module 2 is arranged with the terminal 3 in switchgear
Connection is simultaneously established by electric signal in outside.
In implementation process, sensor module 1 is mounted on to the inside of switch cabinet equipment when testing staff detects at the scene,
The result that sensor module 1 will test is handled and is filtered by signal conditioning circuit module 2, and filtered information is transmitted to
Terminal 3,3 detection switch cabinet fault message of terminal.When detecting that continuous three measured point temperature values are more than predetermined temperature, terminal
3 alarm, and show the temperature value of fault point.
Preferably, the sensor module 1 includes the first communication unit 11 and photon sensor 12；Wherein: the photon
12 output end of sensor and 11 input terminal of the first communication unit are electrically connected；First communication unit, 11 output end and institute
State the wireless communication connection of signal conditioning circuit module 2.
In implementation process, the sensor module 1 is installed in switch cabinet, for adopting when switchgear operates normally
Collect the temperature information of inside switch cabinet, inside has photon sensor 12 to be used to collecting signal, and the first communication unit 11 is used to receive
The signal of collection transfers out.
Preferably, the refrigeration unit 13 is additionally provided in the switchgear, for maintaining the temperature of the sensor module 1
Degree.
In implementation process, the refrigeration unit 13, for maintaining the temperature of the sensor module 1.
Preferably, the photon sensor 12 is mercury cadmium telluride photon type infrared sensor.
In implementation process, mercury cadmium telluride photon type infrared sensor receives infrared radiation transmissions to signal conditioning circuit mould
Block, to realize the measurement to temperature.
Preferably, the photon sensor 12 includes the lens of germanium material, and lens material surface is coated with anti-reflection film.
In implementation process, germainium lens surface is coated with anti-reflection film, and transmitance reaches 85% or more, can effectively inhibit sunlight
Interference.
Preferably, the refrigeration unit 13 uses semiconductor cooler.
In implementation process, the refrigeration unit 13 uses semiconductor cooler, can keep 1 temperature of sensor module
The sensitivity for keeping photon type infrared sensor at -30 DEG C~-32 DEG C and detectivity are in higher level.
Preferably, the signal conditioning circuit module 2 includes multichannel amplifying circuit 20, filter circuit 21, power supply 22, Wei Chu
Manage device 23, the second communication unit 24 and third communication unit 25；Wherein:
Second communication unit, 24 input terminal and the first communication unit output end 11 wireless communication connect；
Second communication unit, 24 output end and 20 input terminal of multichannel amplifying circuit are electrically connected；
20 output end of multichannel amplifying circuit and 21 input terminal of filter circuit are electrically connected；
21 output end of filter circuit and 23 input terminal of microprocessor are electrically connected；
23 output end of microprocessor and 25 input terminal of third communication unit are electrically connected；
25 output end of third communication unit and the terminal 3 are electrically connected, and realize information exchange；
The power supply 22 is the microprocessor 23 power supply.
In implementation process, the signal conditioning circuit module 2 is used for the order provided according to terminal, to high-tension switch cabinet
Built-in electrical insulation situation is detected；The signal that the multichannel amplifying circuit 20 detects sensor module 1 with filter circuit 21
It amplifies and filters, microprocessor 23 carries out prescreening to the inside switch cabinet temperature information that sensor module 1 measures；It is described
Signal conditioning circuit module 2 receives temperature information by the second communication unit 24 and will be after prescreening by third communication unit 25
Information be transferred to terminal 3.
Preferably, the terminal 3 includes fourth communication unit 30, shell 31 and the center processor being arranged in shell 31
32, memory circuit cells 33 and display circuit unit 34；Wherein: the fourth communication unit 30 receives the third communication unit
25 pretreated signal, and it is sent to the center processor 32, the memory circuit cells 33 and the display
Circuit unit 34 is electrically connected with the center processor 32 respectively；The shell 31 uses epoxy resin material.
In implementation process, the temperature information after prescreening is transferred in center processor 32 by fourth communication unit 30
It being handled, the memory circuit cells 33 can store measured point temperature data, it is checked at any time for administrative staff, if
Temperature past due alarm temperature in cabinet, the temperature of monitoring point can be shown in display circuit unit 34 in real time in cabinet.
Embodiment 2
As shown in Figure 1, a kind of switchgear insulation defect detection system based on photon sensor, including sensor module 1,
Signal conditioning circuit module 2 and terminal 3；The sensor module 1 is installed in switch cabinet, for operating normally in switchgear
When acquire inside switch cabinet temperature information, there are photon sensor 12, refrigeration unit 13 and the first communication unit 11 in inside；It is described
Photon sensor 12 is mercury cadmium telluride photon type infrared sensor；Lens material in the photon sensor 12 is germanium, and lens
Surface is coated with anti-reflection film, and transmitance reaches 85% or more, effectively sunlight can be inhibited to interfere；The refrigeration unit 13 is used and is partly led
1 temperature of sensor module, can be maintained at -30 DEG C~-32 DEG C by chiller, keep photon type infrared sensor sensitivity and
Detectivity is in higher level；The signal conditioning circuit module 2 includes the second communication unit 24, multichannel amplifying circuit 20, filtering
Circuit 21, power supply 22, microprocessor 23 and third communication unit 25, the order for being provided according to terminal 3, to high-tension switch cabinet
Built-in electrical insulation situation is detected；The multichannel amplifying circuit 20 puts the signal that sensor exports with filter circuit 21
Greatly, it filters, is converted into the voltage signal proportional to infra-red radiation later, to realize the measurement to temperature, the micro process
Device 23 is used for the data that measure photon sensor 12 prescreening before transmission, if the temperature value of measured point is lower than predetermined filtering
Temperature, then it is assumed that this point abandons this point data there is no insulation defect, and the signal conditioning circuit module 2 is logical by third
Believe that the temperature information after prescreening is transferred to terminal 3 by unit 25；The terminal 3 include fourth communication unit 30, shell 31, in
Heart processor 32, memory circuit cells 33, display circuit unit 34, center processor 32, memory circuit cells 33 and display electricity
Road unit 34 is arranged in shell 31；After the terminal 3 obtains the temperature information of measured point by fourth communication unit 30, center
Processor 32 carries out secondary treatment to data；If the temperature past due alarm temperature of continuous three measured points, terminal 3 will lead to
Cross sound, light mode is alarmed, and the temperature value of the real-time display point；The memory circuit cells 33 can be by measured point temperature
Data are stored, and are checked at any time for administrative staff.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (9)
1. a kind of switchgear insulation defect detection system based on photon sensor, including switchgear, it is characterised in that: further include
Sensor module (1), signal conditioning circuit module (2) and terminal (3)；The sensor module (1) is arranged in the switchgear
Interior, the sensor module (1) and the signal conditioning circuit module (2) wireless communication connect；The signal conditioning circuit mould
Block (2) and the terminal (3) are arranged outside switchgear, establish connection by electric signal.
2. a kind of switchgear insulation defect detection system based on photon sensor according to claim 1, feature exist
In: the sensor module (1) includes the first communication unit (11) and photon sensor (12)；Wherein:
Photon sensor (12) output end and the first communication unit (11) input terminal are electrically connected；First communication
Unit (11) output end and the signal conditioning circuit module (2) wireless communication connect.
3. a kind of switchgear insulation defect detection system based on photon sensor according to claim 2, feature exist
In: it is additionally provided with refrigeration unit in the switchgear, for maintaining the temperature of the sensor module (1).
4. a kind of switchgear insulation defect detection system based on photon sensor according to claim 2, feature exist
In: the photon sensor (12) is mercury cadmium telluride photon type infrared sensor.
5. a kind of switchgear insulation defect detection system based on photon sensor according to claim 4, feature exist
In: the photon sensor (12) includes the lens of germanium material, and lens material surface is coated with anti-reflection film.
6. a kind of switchgear insulation defect detection system based on photon sensor according to claim 3, feature exist
In: the refrigeration unit uses semiconductor cooler.
7. a kind of switchgear insulation defect detection system based on photon sensor according to claim 2, feature exist
In: the signal conditioning circuit module (2) includes multichannel amplifying circuit (20), filter circuit (21), power supply (22), microprocessor
(23), the second communication unit (24) and third communication unit (25)；Wherein:
Second communication unit (24) input terminal and the first communication unit (11) output end wireless communication connect；
Second communication unit (24) output end and multichannel amplifying circuit (20) input terminal are electrically connected；
Multichannel amplifying circuit (20) output end and the filter circuit (21) input terminal are electrically connected；
Filter circuit (21) output end and the microprocessor (23) input terminal are electrically connected；
Microprocessor (23) output end and third communication unit (25) input terminal are electrically connected；
Third communication unit (25) output end and the terminal (3) are electrically connected, and realize information exchange；
The power supply (22) is the microprocessor (23) power supply.
8. a kind of switchgear insulation defect detection system based on photon sensor according to claim 7, feature exist
In: the terminal (3) includes fourth communication unit (30), shell (31) and the center processor being arranged in shell (31)
(32), memory circuit cells (33) and display circuit unit (34)；Wherein: the fourth communication unit (30) receives the third
The pretreated signal of communication unit (25), and it is sent to the center processor (32), the memory circuit cells
(33) it is electrically connected respectively with the center processor (32) with the display circuit unit (34).
9. a kind of switchgear insulation defect detection system based on photon sensor according to claim 7, feature exist
In: the shell (31) uses epoxy resin material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910765270.4A CN110488163A (en) | 2019-08-19 | 2019-08-19 | A kind of switchgear insulation defect detection system based on photon sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910765270.4A CN110488163A (en) | 2019-08-19 | 2019-08-19 | A kind of switchgear insulation defect detection system based on photon sensor |
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| CN110488163A true CN110488163A (en) | 2019-11-22 |
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ID=68551474
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910765270.4A Pending CN110488163A (en) | 2019-08-19 | 2019-08-19 | A kind of switchgear insulation defect detection system based on photon sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111260622A (en) * | 2020-01-14 | 2020-06-09 | 湖南城市学院 | Equipment for installing electrical devices inside switch cabinet and control method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202903335U (en) * | 2012-11-30 | 2013-04-24 | 重庆市电力公司市区供电局 | Switch-cabinet temperature-infrared monitoring system |
| CN205844465U (en) * | 2016-07-15 | 2016-12-28 | 国网江苏省电力公司检修分公司 | A kind of high voltage power transmission and transforming station GIS device failure detector |
-
2019
- 2019-08-19 CN CN201910765270.4A patent/CN110488163A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202903335U (en) * | 2012-11-30 | 2013-04-24 | 重庆市电力公司市区供电局 | Switch-cabinet temperature-infrared monitoring system |
| CN205844465U (en) * | 2016-07-15 | 2016-12-28 | 国网江苏省电力公司检修分公司 | A kind of high voltage power transmission and transforming station GIS device failure detector |
Non-Patent Citations (1)
| Title |
|---|
| 雷虎民: "《导弹制导控制原理 第2版》", 31 July 2018, 北京：国防工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111260622A (en) * | 2020-01-14 | 2020-06-09 | 湖南城市学院 | Equipment for installing electrical devices inside switch cabinet and control method |
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Application publication date: 20191122 |
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