CN108181000A - A kind of contact of breaker detection method for temperature rise based on GIS housing thermometrics - Google Patents
A kind of contact of breaker detection method for temperature rise based on GIS housing thermometrics Download PDFInfo
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- CN108181000A CN108181000A CN201810002164.6A CN201810002164A CN108181000A CN 108181000 A CN108181000 A CN 108181000A CN 201810002164 A CN201810002164 A CN 201810002164A CN 108181000 A CN108181000 A CN 108181000A
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- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 230000001235 sensitizing effect Effects 0.000 claims abstract description 18
- 206010037660 Pyrexia Diseases 0.000 claims abstract description 10
- 230000008878 coupling Effects 0.000 claims abstract description 6
- 238000010168 coupling process Methods 0.000 claims abstract description 5
- 238000005859 coupling reaction Methods 0.000 claims abstract description 5
- 238000004088 simulation Methods 0.000 claims description 12
- 238000004458 analytical method Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 11
- 239000004020 conductor Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0096—Radiation pyrometry, e.g. infrared or optical thermometry for measuring wires, electrical contacts or electronic systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/48—Thermography; Techniques using wholly visual means
- G01J5/485—Temperature profile
-
- 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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
Abstract
The present invention relates to a kind of contact of breaker detection method for temperature rise based on GIS housing thermometrics, include the following steps：1) environment temperature, air pressure inside and the load current of GIS breakers under a certain operating mode are obtained；2) the three dimensions multiple physical field coupling model of GIS circuit breaker internals contact fever is established, the inside contact temperature for obtaining GIS breakers under current working rises the Δ T and maximum temperature rise Δ T of housing outer surface temperature corresponding with inside contact liter sensitizing rangewBetween functional relation, which is：Δ T=f (I0, T0, P0, Δ Tw), I0For load current, T0For environment temperature, P0For air pressure inside；3) GIS Shell of circuit breaker outer surface Distribution of temperature rise under operating mode is obtained, the temperature that all temperature of record GIS housing outer surfaces rise sensitizing range rises maximum value；4) according to the functional relation, the Wen Sheng for obtaining GIS circuit breaker internal contacts under operating mode is calculated.Compared with prior art, the present invention has many advantages, such as accuracy and safe.
Description
Technical field
The present invention relates to the overheating fault detection fields of high-tension power transmission and transformation equipment, and GIS housings are based on more particularly, to one kind
The contact of breaker detection method for temperature rise of thermometric.
Background technology
GIS (Gas Insulated Switchgear, gas insulation metal seal combined electrical apparatus) equipment because its miniaturization,
Outstanding advantages of reliability is high, through-current capability is strong, the application in electric system is increasingly extensive.However when inner conductor contacts not
When good, it is easy to cause the features such as leakproofness is tight, compact-sized that the fever of load current lower conductor is serious, and temperature rises excessively high, Jin Erjia
Fast insulating materials aging, causes insulation performance to reduce, and causes the great power grid accidents such as short circuit.Therefore, GIS inner conductors are touched
Head temperature is calculated, and finds in advance and eliminates equipment internal flaw and potential faults, has to the safe and stable operation of GIS device
It is significant.
Overheating fault is led to the problem of for GIS circuit breaker internal contacts, existing measuring and calculating means are determined including loop resistance
The methods of phase measurement, Partial Discharge Detection, regular infrared detection and optical fiber grating temperature detect.Loop resistance measurement method cannot
Charging equipment is detected, and can not determine quantity and the position of failure contact.Partial discharge detection method is currently without specific
Criterion, the relationship not yet thoroughly research of overheat and partial discharge, there are the possibility that contact overheat can not but monitor partial discharge phenomenon.Periodically
Hand-held IR thermal imaging inspection is only able to detect GIS case for circuit breaker surface temperatures, and by weather and the shadow of artificial subjective factor
Sound is larger；The method of breaker built-in infrared probe can realize the direct detection to internal contact temperature, but need outside to GIS
Shell structure is transformed, and lacks feasibility for the equipment under operating condition.Fiber-optic grating sensor can be outer by detecting
Shell temperature change judges whether inside contact overheats, and charging equipment can be detected, but can not be accurately to inside contact temperature
Degree is calculated.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind based on the survey of GIS housings
The contact of breaker detection method for temperature rise of temperature.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of contact of breaker detection method for temperature rise based on GIS housing thermometrics, includes the following steps：
1) environment temperature, air pressure inside and the load current of GIS breakers under a certain operating mode are obtained；
2) the three dimensions multiple physical field coupling model of GIS circuit breaker internals contact fever is established, is obtained under current working
The inside contact temperature of GIS breakers rises Δ T and housing outer surface temperature corresponding with inside contact rises the maximum temperature of sensitizing range
Rise Δ TwBetween functional relation, which is：Δ T=f (I0, T0, P0, Δ Tw), I0For load current, T0For environment temperature
Degree, P0For air pressure inside；
3) GIS Shell of circuit breaker outer surface Distribution of temperature rise under operating mode is obtained, all temperature of record GIS housing outer surfaces rise sensitive
The temperature in region rises maximum value；
4) according to the functional relation, the Wen Sheng for obtaining GIS circuit breaker internal contacts under operating mode is calculated.
Further, step 2) is specially：
201) the three dimensions multiple physical field of the GIS circuit breaker internals contact fever is established using finite element emulation software
Coupling model；
202) contact state is set, and emulation obtains GIS open circuits under different contact states under current simulated conditions
The inside contact temperature of device rises Δ T and housing outer surface temperature corresponding with inside contact rises the maximum temperature rise Δ T of sensitizing rangew,
The simulated conditions include load current, environment temperature and air pressure inside；
203) the multigroup simulation result obtained to step 202) carries out curve fitting, and obtains the inside contact of GIS breakers
Temperature rises Δ T and housing outer surface temperature corresponding with inside contact rises the maximum temperature rise Δ T of sensitizing rangewBetween function close
System.
Further, in step 201), finite element simulation is carried out using COMSOL Multiphysics.
Further, in step 202), the contact state between contact by setting different contact resistances
Value changes.
Further, in step 203), the curve matching is carried out using MATLAB numerical analysis softwares.
Further, in step 3), infrared image is carried out to the GIS breakers under the operating mode using thermal infrared imager and is adopted
Collection obtains the GIS Shell of circuit breaker outer surface Distribution of temperature rise according to the infrared image.
Further, the thermal infrared imager is UAV system thermal infrared imager.
Compared with prior art, the invention has the advantages that：
1) present invention rises sensitizing range by infrared measurement of temperature and temperature and establishes functional relation, it can be achieved that different voltages grades
Effective measuring and calculating of GIS circuit breaker internal contact temperatures is, it can be achieved that the non-contact detection in the case of equipment live, without power-off
Operation, without carrying out the transformation of any device structure, accuracy and safe.
2) present invention can be to including in addition to breaker inside other GIS devices such as busbar, disconnecting switch in substation
Contact is carried out at the same time temperature measuring and calculating, can improve the thermal fault detection efficiency of substation equipment.
3) present invention uses the finite element analysis software COMSOL Multiphysics being good at multiple physical field coupling Simulation
Simulation calculation is carried out, the 3 D stereo simulation model of inside contact fever is built according to the actual size of each component of GIS breakers,
It is related to the multiple physical fields coupled wave theory such as electromagnetic field, flow field, temperature field, it is contemplated that environment temperature, load current, gas pressure intensity etc.
Influence of the factor to thermo parameters method, simulation result are more in line with actual conditions, and reliability and accuracy are high.
4) present invention adopts the GIS case for circuit breaker progress infrared image under operating mode using UAV system thermal infrared imager
Collection obtains GIS Shell of circuit breaker surface and the corresponding maximum temperaturerise of over-heat inside contact from infrared image, belongs to non-contact
Formula detect, without to running equipment carry out power operation, infrared image shooting influenced by outside environmental elements it is small, without
Any change is carried out to device structure, safety and reliability is high.
5) present invention carries out curve fitting to multigroup emulation data using MATLAB numerical analysis softwares, obtain with reality
Under the primary condition such as the identical load current of border operating mode, environment temperature, air pressure inside, GIS contact of breaker temperature rises and corresponds to outer
Functional relation between shell maximum temperaturerise need to only rise the GIS Shell of circuit breaker temperature that radar stealthy materials under operating condition measure sensitive
The maximum temperature rise value in region substitutes into wherein, can extrapolate the Wen Sheng of inside contact, method is highly reliable, efficient.
6) effective reckoning to the GIS circuit breaker internal contacts Wen Sheng of different voltages grade can be achieved in the present invention, not office
It is limited to a kind of voltage class.The present disclosure applies equally in substation in addition to breaker include busbar, disconnecting switch etc. its
The temperature of his GIS device inside contact, which rises, calculates have a wide range of application.
Description of the drawings
Fig. 1 is the flow diagram of the method for the present invention；
Fig. 2 is the simulation result figure of the present invention；
Fig. 3 is temperature-measurement principle figure of the present invention；
In Fig. 3,1, GIS case for circuit breaker, 2, inside contact, 3, arc-chutes, 4, insulator, 5, temperature sensor, 6, negative
Lotus detecting system, 7, pressure monitoring system, 8, temperature rise sensitizing range, 9, thermal infrared imager, 10, processor.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to
Following embodiments.
As shown in Figure 1, the present embodiment provides a kind of contact of breaker detection method for temperature rise based on GIS housing thermometrics, packet
Include following steps：
S101 obtains the environment temperature of GIS breakers, air pressure inside and load current under a certain operating mode.
As one of embodiment, the mounting temperature sensor in the range of 2 meters of distance GIS case for circuit breaker obtains institute
State the environment temperature T of GIS breakers0, the GIS circuit breaker internals atmospheric pressure value P is obtained from pressure monitoring system0, from cutting load testing
System obtains the load current I of the GIS breakers0。
S102 establishes the more physics of three dimensions of the GIS circuit breaker internals contact fever using finite element emulation software
Field coupling model；Contact state is set, and emulation obtains under current simulated conditions GIS breakers under different contact states
Inside contact temperature rise the maximum temperature rise Δ T that Δ T and housing outer surface temperature corresponding with inside contact rise sensitizing rangew, institute
It states simulated conditions and includes load current, environment temperature and air pressure inside.Temperature liter sensitizing range refers to temperature liter and is significantly higher by peripheral region
Region.
As one of embodiment, finite element simulation is carried out using COMSOL Multiphysics.Contact state
Changed by setting different contact resistance values between contact.
Fig. 2 illustrates that the present invention is based on the contact of breaker temperature of GIS housing infrared measurement of temperature to rise one of projectional technique emulation
As a result result figure shows that GIS casing surface temperature differences are apparent.
The thermo parameters method of GIS contact of breaker fever is by the comprehensive of load current, environment temperature and internal gas pressure
It takes a group photo and rings, and the contact fever of circuit breaker internal different location is reflected in the temperature liter peak position difference of case surface, thus
The present invention combines the heat-transfer character of GIS contact of breaker under typical service condition, by finite element method, calculates negative
Charged current I0, environment temperature T0With internal gas pressure P0Comprehensive function under GIS breakers thermo parameters method, according to temperature
Field distribution determines case for circuit breaker surface and the corresponding maximum temperaturerise Δ T of inside contactwAnd inner heat contact is in itself
Temperature rises Δ T.
S103 carries out curve fitting to multigroup simulation result of acquisition, and the inside contact temperature for obtaining GIS breakers rises Δ T
And housing outer surface temperature corresponding with inside contact rises the maximum temperature rise Δ T of sensitizing rangewBetween functional relation.The function
Relationship is：Δ T=f (I0, T0, P0, Δ Tw), I0For load current, T0For environment temperature, P0For air pressure inside.As wherein one
A embodiment carries out the curve matching using MATLAB numerical analysis softwares.
Keep primary condition load current I0, environment temperature T0And internal gas pressure P0It is constant, by changing GIS open circuits
The contact condition of device inside contact calculates GIS breaker temperature field distribution under different contact states, obtains different
Shell maximum temperaturerise Δ TwΔ T is risen with inside contact temperature.Using MATLAB numerical analysis softwares to multigroup simulation result into
Row curve matching obtains the functional relation Δ T=that GIS temperature of circuit breaker contact rises sensitizing range maximum temperature rise with corresponding shell temperature
f(I0, T0, P0, Δ Tw)。
Multigroup functional relation can be obtained by changing simulated conditions.
S104, obtains GIS Shell of circuit breaker outer surface Distribution of temperature rise under a certain operating mode, and record GIS housing outer surfaces own
The temperature that temperature rises sensitizing range rises maximum value.
As one of embodiment, infrared image is carried out to the GIS breakers under the operating mode using thermal infrared imager
Acquisition obtains the GIS Shell of circuit breaker outer surface Distribution of temperature rise according to the infrared image.Preferably, thermal infrared imager is
UAV system thermal infrared imager.
S105 calculates the Wen Sheng for obtaining GIS circuit breaker internal contacts under the operating mode.
In above-mentioned steps, step S101-S105 can be being performed under different operating modes, realize the GIS breakers of different operating modes
Inside contact temperature rises detection.
As one embodiment, Fig. 3 illustrates the temperature-measurement principle figure of the present invention.According to fluid flow and heat transfer theory,
GIS circuit breaker internal different locations contact overheat can generate different thermo parameters method characteristics in case surface, utilize the distribution
Characteristic and finite element numerical computational methods can determine to mark 8 in figure with 2 corresponding shell maximum temperature point of inside contact
In regional extent where (i.e. 2 corresponding case surface temperature of inside contact rises sensitizing range), from the heat of the shooting of thermal infrared imager 9
Sensitizing range maximum temperature rise Δ T is risen as the corresponding shell temperature of the contact can be obtained in figurew.It is installed in the range of 2 meters of shell
Temperature sensor 5 obtains environment temperature T0.Air pressure inside P is obtained from pressure monitoring system 70.It is obtained from cutting load testing system 6 negative
Charged current I0.Processor 10 utilizes aforementioned functions relational expression and the maximum temperature rise Δ T gotwGIS circuit breaker internals are touched in realization
Head temperature rises the reckoning of Δ T.
The preferred embodiment of the present invention described in detail above.It should be appreciated that those of ordinary skill in the art without
Creative work is needed according to the present invention can to conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be in the protection domain being defined in the patent claims.
Claims (7)
1. a kind of contact of breaker detection method for temperature rise based on GIS housing thermometrics, which is characterized in that include the following steps：
1) environment temperature, air pressure inside and the load current of GIS breakers under a certain operating mode are obtained；
2) the three dimensions multiple physical field coupling model of GIS circuit breaker internals contact fever is established, GIS under current working is obtained and breaks
The inside contact temperature of road device rises Δ T and housing outer surface temperature corresponding with inside contact rises the maximum temperature rise Δ T of sensitizing rangew
Between functional relation, which is：Δ T=f (I0, T0, P0, Δ Tw), I0For load current, T0For environment temperature, P0
For air pressure inside；
3) GIS Shell of circuit breaker outer surface Distribution of temperature rise under operating mode is obtained, all temperature of record GIS housing outer surfaces rise sensitizing range
Temperature rise maximum value；
4) according to the functional relation, the Wen Sheng for obtaining GIS circuit breaker internal contacts under operating mode is calculated.
2. the contact of breaker detection method for temperature rise according to claim 1 based on GIS housing thermometrics, which is characterized in that
Step 2) is specially：
201) the three dimensions multiple physical field that the GIS circuit breaker internals contact fever is established using finite element emulation software is coupled
Model；
202) contact state is set, and emulation obtains under current simulated conditions GIS breakers under different contact states
Inside contact temperature rises Δ T and housing outer surface temperature corresponding with inside contact rises the maximum temperature rise Δ T of sensitizing rangew, it is described
Simulated conditions include load current, environment temperature and air pressure inside；
203) the multigroup simulation result obtained to step 202) carries out curve fitting, and obtains the inside contact Wen Sheng of GIS breakers
Δ T and housing outer surface temperature corresponding with inside contact rise the maximum temperature rise Δ T of sensitizing rangewBetween functional relation.
3. the contact of breaker detection method for temperature rise according to claim 2 based on GIS housing thermometrics, which is characterized in that
In step 201), finite element simulation is carried out using COMSOL Multiphysics.
4. the contact of breaker detection method for temperature rise according to claim 2 based on GIS housing thermometrics, which is characterized in that
In step 202), the contact state is changed by setting different contact resistance values between contact.
5. the contact of breaker detection method for temperature rise according to claim 2 based on GIS housing thermometrics, which is characterized in that
In step 203), the curve matching is carried out using MATLAB numerical analysis softwares.
6. the contact of breaker detection method for temperature rise according to claim 1 based on GIS housing thermometrics, which is characterized in that
In step 3), infrared image acquisition is carried out to the GIS breakers under the operating mode using thermal infrared imager, according to the infrared figure
As obtaining the GIS Shell of circuit breaker outer surface Distribution of temperature rise.
7. the contact of breaker detection method for temperature rise according to claim 6 based on GIS housing thermometrics, which is characterized in that
The thermal infrared imager is UAV system thermal infrared imager.
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| CN201810002164.6A CN108181000A (en) | 2018-01-02 | 2018-01-02 | A kind of contact of breaker detection method for temperature rise based on GIS housing thermometrics |
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| CN201810002164.6A CN108181000A (en) | 2018-01-02 | 2018-01-02 | A kind of contact of breaker detection method for temperature rise based on GIS housing thermometrics |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188267A (en) * | 2018-10-18 | 2019-01-11 | 国网山东省电力公司潍坊供电公司 | It is a kind of to monitor the device of GIS contact system electric contact failure, method and system |
| CN109556759A (en) * | 2018-11-14 | 2019-04-02 | 广东电网有限责任公司惠州供电局 | A kind of experimental method for probing into switchgear the Temperature Rising Law |
| CN111090007A (en) * | 2019-12-18 | 2020-05-01 | 国网上海市电力公司 | Memory, conductive loop electric contact state evaluation method, device and equipment |
| CN111880122A (en) * | 2020-06-30 | 2020-11-03 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Device and method for evaluating contact state of contact seat and conductive rod of GIL equipment |
| CN111896133A (en) * | 2019-05-05 | 2020-11-06 | 河南平芝高压开关有限公司 | GIS isolating switch, temperature measuring and calculating method and device |
| CN112347642A (en) * | 2020-11-06 | 2021-02-09 | 广东电网有限责任公司佛山供电局 | Method and system for selecting sample data set in GIS circuit breaker contact temperature calculation |
| CN112507577A (en) * | 2020-11-06 | 2021-03-16 | 广东电网有限责任公司佛山供电局 | GIS breaker contact steady-state temperature calculation method and system based on pattern recognition |
| CN112697195A (en) * | 2020-11-12 | 2021-04-23 | 珠海一多智能科技有限公司 | High-voltage bushing load air pressure temperature on-line monitoring and diagnosis method |
| CN112798643A (en) * | 2020-12-09 | 2021-05-14 | 国网宁夏电力有限公司检修公司 | Maintenance method, medium and system for contact finger of wall bushing |
| CN111024233B (en) * | 2019-11-14 | 2021-10-08 | 国网上海市电力公司 | Simulation device for poor contact of GIS internal contact and infrared calibration method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188267A (en) * | 2018-10-18 | 2019-01-11 | 国网山东省电力公司潍坊供电公司 | It is a kind of to monitor the device of GIS contact system electric contact failure, method and system |
| CN109556759A (en) * | 2018-11-14 | 2019-04-02 | 广东电网有限责任公司惠州供电局 | A kind of experimental method for probing into switchgear the Temperature Rising Law |
| CN111896133A (en) * | 2019-05-05 | 2020-11-06 | 河南平芝高压开关有限公司 | GIS isolating switch, temperature measuring and calculating method and device |
| CN111896133B (en) * | 2019-05-05 | 2022-07-29 | 河南平芝高压开关有限公司 | GIS disconnecting switch, temperature measuring and calculating method and device |
| CN111024233B (en) * | 2019-11-14 | 2021-10-08 | 国网上海市电力公司 | Simulation device for poor contact of GIS internal contact and infrared calibration method |
| CN111090007A (en) * | 2019-12-18 | 2020-05-01 | 国网上海市电力公司 | Memory, conductive loop electric contact state evaluation method, device and equipment |
| CN111880122A (en) * | 2020-06-30 | 2020-11-03 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Device and method for evaluating contact state of contact seat and conductive rod of GIL equipment |
| CN112507577A (en) * | 2020-11-06 | 2021-03-16 | 广东电网有限责任公司佛山供电局 | GIS breaker contact steady-state temperature calculation method and system based on pattern recognition |
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| CN112347642A (en) * | 2020-11-06 | 2021-02-09 | 广东电网有限责任公司佛山供电局 | Method and system for selecting sample data set in GIS circuit breaker contact temperature calculation |
| CN112697195A (en) * | 2020-11-12 | 2021-04-23 | 珠海一多智能科技有限公司 | High-voltage bushing load air pressure temperature on-line monitoring and diagnosis method |
| CN112798643A (en) * | 2020-12-09 | 2021-05-14 | 国网宁夏电力有限公司检修公司 | Maintenance method, medium and system for contact finger of wall bushing |
| CN112798643B (en) * | 2020-12-09 | 2022-07-05 | 国网宁夏电力有限公司检修公司 | Maintenance method, medium and system for contact finger of wall bushing |
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