CN112305382B - Method for rapidly identifying working state of internal equipment of high-voltage switch cabinet - Google Patents
Method for rapidly identifying working state of internal equipment of high-voltage switch cabinet Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 51
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 21
- 230000001052 transient effect Effects 0.000 claims abstract description 15
- 230000007547 defect Effects 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 18
- 230000002159 abnormal effect Effects 0.000 claims description 15
- 238000004458 analytical method Methods 0.000 claims description 14
- 230000005856 abnormality Effects 0.000 claims description 12
- 238000012423 maintenance Methods 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000012790 confirmation Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 4
- 238000010234 longitudinal analysis Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 abstract description 9
- 230000003203 everyday effect Effects 0.000 abstract description 2
- 230000005684 electric field Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000002354 daily effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
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Classifications
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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
- G01R31/1209—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 acoustic measurements
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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
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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
- G01R31/1227—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
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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
- G01J2005/0077—Imaging
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The invention discloses a method for rapidly identifying the working state of internal equipment of a high-voltage switch cabinet, which comprises the steps of infrared temperature measurement, ground voltage partial discharge detection and ultrasonic partial discharge detection, wherein the three detection modes are adopted to detect the internal working state of the switch cabinet together, the on-line equipment is set to model the interrelationship between the surface temperature of the internal equipment of the switch cabinet and transient ground voltage wave data in a specific range at regular time every day, and after the surface temperature measurement and the transient ground voltage wave partial discharge data of the internal equipment of the switch cabinet are obtained, the measurement data are recorded. According to the invention, the manual intervention is not needed, the safety of equipment operation is ensured by means of reducing the load or changing the operation mode of the system, the identification capability and predictability of operators on equipment defects are improved, and the functions of automatic inspection, automatic early warning, automatic report output and the like of the equipment can be realized due to higher system automation degree, so that the number of times of on-site inspection of the operators is reduced, and the working efficiency of the operators is improved.
Description
Technical Field
The invention relates to the technical field of power transmission and transformation equipment state monitoring systems of power grids, in particular to a method for rapidly identifying the working state of equipment inside a high-voltage switch cabinet.
Background
The switch cabinet is an electrical device, the external line of the switch cabinet firstly enters the main control switch in the cabinet and then enters the sub-control switch, each shunt is arranged according to the requirements, such as an instrument, an automatic control, a motor magnetic switch, various alternating current contactors and the like, a high-voltage chamber and a low-voltage chamber switch cabinet are also arranged, a high-voltage bus is arranged, such as a power plant and the like, and low-cycle load shedding for protecting the main equipment is also arranged.
The main function of the switch cabinet is to open and close, control and protect electric equipment in the process of power generation, transmission, distribution and electric energy conversion of a power system, however, in the process of electrifying and using the existing switch cabinet, the internal temperature is too high, and the electric elements in the switch cabinet are easily damaged, so that a user is required to monitor the internal temperature of the switch cabinet at intervals, however, the existing method for identifying the working state of the internal equipment of the high-voltage switch cabinet is single, infrared temperature measurement is adopted, the temperature measurement can be carried out on the internal equipment of the switch cabinet only through an infrared window on the surface of the switch cabinet, because the internal structure of the switch cabinet is complex, the infrared temperature measurement can only be measured from a fixed angle, the working temperature state of the equipment cannot be accurately reflected, and the internal structure of the switch cabinet is complex, when the local discharge state of the switch cabinet is diagnosed by adopting a transient voltage (TEV) method, the measured data also cannot accurately reflect the working state of the equipment, when the local discharge state of the switch cabinet is singly diagnosed by adopting ultrasonic wave local discharge data, the working state of the internal equipment of the switch cabinet cannot be comprehensively judged, and therefore the working state of the internal equipment of the switch cabinet cannot be judged in a limited mode.
Disclosure of Invention
The invention aims at: in order to solve the problems that the existing method for identifying the working state of the internal equipment of the high-voltage switch cabinet is single, the mode of judging the working state of the internal equipment of the switch cabinet by single data has great limitation and can not effectively judge the working state of the internal equipment of the switch cabinet, the method for rapidly identifying the working state of the internal equipment of the high-voltage switch cabinet is provided.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the method for rapidly identifying the working state of the internal equipment of the high-voltage switch cabinet comprises the steps of infrared temperature measurement, ground wave partial discharge detection and ultrasonic partial discharge detection, wherein the method for identifying the working state of the internal equipment of the high-voltage switch cabinet comprises the following steps:
s1, detecting the internal working state of a switch cabinet by adopting three detection modes of infrared temperature measurement, ground wave partial discharge detection and ultrasonic partial discharge detection;
s2, modeling the interrelation between the surface temperature of the internal equipment of the switch cabinet in a specific range and transient voltage wave data by setting the daily timing of the online equipment;
s3, after the surface temperature measurement and transient voltage wave partial discharge data of the internal equipment of the switch cabinet are obtained, recording the measurement data, wherein the recorded data are as follows:
surface temperature average temperature of equipment inside the switch cabinet: tave;
highest temperature and lowest temperature of surface temperature of internal equipment of switch cabinet: tmax, tmin;
surface temperature difference of equipment inside the switch cabinet: tdet;
data are put in switch cabinet internal equipment transient state ground voltage wave office: p is as follows;
the transient voltage wave partial discharge average data of equipment in the switch cabinet: PAVE;
ultrasonic partial discharge data of internal equipment of switch cabinet: s, S;
ultrasonic partial discharge average data of internal equipment of switch cabinet: SAVE.
S4, when Tdet is more than or equal to 5 ℃, the working state of equipment in the switch cabinet is abnormal, and a system gives a fault maintenance report;
s5, when the (((P-PAVE)/PAVE) is 100 percent) is more than or equal to 20 percent and the P is more than 6dB, the working state of the internal equipment of the switch cabinet is abnormal, and a fault maintenance report is given by the system;
s6, under the condition that the two conditions are not met, judging by adopting the following calculation formula: k=k 1 ×（T max -T ave ）/T+k 2 ×（1-（5-T）/5）+k×（P max -P ave ）/P+k×（S max -S ave ）/S ave ;
S7, when K is greater than or equal to K, the working state of equipment in the switch cabinet is abnormal, and a system gives a fault maintenance report.
As a further description of the above technical solution:
the infrared temperature measurement adopts a hand-held thermal imager to finish the surface temperature measurement work of the internal equipment of the switch cabinet.
As a further description of the above technical solution:
the ground wave partial discharge detection method comprises the following steps:
d1, setting test points on the front side and the rear side of the switch cabinet, and setting the test points on the side surface if the conditions are met;
d2, testing background noise in air and metal, selecting a metal object far away from the switch cabinet in the switch chamber when testing the metal background noise, placing a metal plate far away from the switch cabinet when testing the air background noise, and testing the sensor next to the metal plate;
d3, conventional detection is firstly used, and if abnormality is found in the conventional detection, positioning detection is further adopted for further confirmation;
and D4, in the result analysis, longitudinal analysis and transverse analysis can be adopted, in the detection process, if a less obvious abnormality is found, the test is carried out regularly and a record is formed for final analysis and comparison, and if the abnormality is found but the abnormality cannot be judged, the comparison and the confirmation can be carried out by detecting other switch cabinets in the same room.
As a further description of the above technical solution:
the ultrasonic partial discharge detection method comprises the following steps:
b1, before detection starts, judging whether the background and detection point ultrasonic signals are normal or not through measurement of effective values, amplitude values, frequency correlations, phases and original waveforms of the background and detection point ultrasonic signals;
b2, if an abnormal signal exists, further analyzing and confirming whether the detected equipment has obvious defects or not so as to determine the reasons and positions of the defects;
b3, for suspected defects, intermittent and unstable abnormal signals, other different detection means such as ultrahigh frequency, infrared temperature measurement, analysis of decomposed products, X-rays and the like can be utilized for auxiliary detection.
As a further description of the above technical solution:
the surface temperature of the internal equipment of the switch cabinet is obtained through a pre-calibrated range in a temperature matrix acquired by the thermal infrared imager.
As a further description of the above technical solution:
k1=3.0 in the calculation formula; k2 =0.22; k3 =2.0; k3 =2.8.
As a further description of the above technical solution:
the K value in the calculation formula is set to 0.7.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
1. according to the invention, after the 4G or WIFI-based switch cabinet internal working state monitoring system is adopted, the temperature condition of the operation equipment is automatically patrolled and examined in real time without manual intervention, and an audible alarm signal is sent out according to a preset early warning value, so that an operator (or a duty dispatcher) can take corresponding measures in time, the safety of equipment operation is ensured by means of reducing load or changing the system operation mode and the like, and the identification capability and predictability of the operator on equipment defects are improved.
2. According to the invention, the system can automatically collect the working state heat map of the current equipment according to the pre-designed inspection strategy, record the working temperature of the equipment at the moment, and compare whether the working temperature of the current equipment is higher than the preset alarm temperature.
3. In the invention, because the system has higher degree of automation, the functions of automatic inspection, automatic early warning, automatic report output and the like of the equipment can be realized, the number of on-site inspection of personnel is reduced, and the working efficiency of operators is improved.
Detailed Description
The following description will clearly and fully describe the technical solutions of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a technical scheme that: the method for rapidly identifying the working state of the internal equipment of the high-voltage switch cabinet comprises the following steps of:
s1, detecting the internal working state of a switch cabinet by adopting three detection modes of infrared temperature measurement, ground wave partial discharge detection and ultrasonic partial discharge detection;
s2, modeling the interrelation between the surface temperature of the internal equipment of the switch cabinet in a specific range and transient voltage wave data by setting the daily timing of the online equipment;
s3, after the surface temperature measurement and transient voltage wave partial discharge data of the internal equipment of the switch cabinet are obtained, recording the measurement data, wherein the recorded data are as follows:
surface temperature average temperature of equipment inside the switch cabinet: tave;
highest temperature and lowest temperature of surface temperature of internal equipment of switch cabinet: tmax, tmin;
surface temperature difference of equipment inside the switch cabinet: tdet;
data are put in switch cabinet internal equipment transient state ground voltage wave office: p is as follows;
the transient voltage wave partial discharge average data of equipment in the switch cabinet: PAVE;
ultrasonic partial discharge data of internal equipment of switch cabinet: s, S;
ultrasonic partial discharge average data of internal equipment of switch cabinet: SAVE.
S4, when Tdet is more than or equal to 5 ℃, the working state of equipment in the switch cabinet is abnormal, and a system gives a fault maintenance report;
s5, when the (((P-PAVE)/PAVE) is 100 percent) is more than or equal to 20 percent and the P is more than 6dB, the working state of the internal equipment of the switch cabinet is abnormal, and a fault maintenance report is given by the system;
s6, under the condition that the two conditions are not met, judging by adopting the following calculation formula: k=k 1 ×（T max -T ave ）/T+k 2 ×（1-（5-T）/5）+k×（P max -P ave ）/P+k×（S max -S ave ）/S ave ;
S7, when K is greater than or equal to K, the working state of equipment in the switch cabinet is abnormal, and a system gives a fault maintenance report.
The system can automatically collect the working state heat map of the current equipment according to a predesigned inspection strategy, record the working temperature of the equipment at the moment, compare whether the working temperature of the current equipment is higher than the preset alarm temperature, after the working sequence is adopted, the system can give the temperature change trend of all the equipment in the inspection strategy at the same time every day within a period of time, the temperature change trend is combined with the data of other online detection systems, the working state of the equipment can be greatly and conveniently accurately judged, a management system of all the equipment and equipment parts is established, the temperature analysis record is carried out on all the equipment parts in the inspection range of the thermal infrared imager while the inspection is automatically carried out, and the specific equipment fault part can be detailed during the alarm.
Specifically, the infrared temperature measurement adopts a hand-held thermal imager to finish the surface temperature measurement work of the internal equipment of the switch cabinet, and the surface temperature of the internal equipment of the switch cabinet is obtained through a pre-calibrated range in a temperature matrix acquired by the infrared thermal imager.
Specifically, the method for detecting the partial discharge of the ground wave comprises the following steps:
d1, setting test points on the front side and the rear side of the switch cabinet, and setting the test points on the side surface if the conditions are met;
d2, testing background noise in air and metal, selecting a metal object far away from the switch cabinet in the switch chamber when testing the metal background noise, placing a metal plate far away from the switch cabinet when testing the air background noise, and testing the sensor next to the metal plate;
d3, conventional detection is firstly used, and if abnormality is found in the conventional detection, positioning detection is further adopted for further confirmation;
and D4, in the result analysis, longitudinal analysis and transverse analysis can be adopted, in the detection process, if a less obvious abnormality is found, the test is carried out regularly and a record is formed for final analysis and comparison, and if the abnormality is found but the abnormality cannot be judged, the comparison and the confirmation can be carried out by detecting other switch cabinets in the same room.
When the high-voltage electrical equipment generates partial discharge, the discharge quantity is always gathered at the grounding metal part adjacent to the grounding point to form earth current and propagates on the metal surface of the equipment, for internal discharge, the discharge quantity is gathered at the inner surface of the grounding shield, when the shield is continuous, discharge signals are difficult to detect outside the equipment, but a shielding layer is usually discontinuous at the insulating part, a gasket connection part, a cable insulation terminal and other parts, the high-frequency signals of the partial discharge are transmitted to the shielding shell of the equipment, the occurrence of the partial discharge phenomenon generates a changed electric field according to the Maxwell electromagnetic field theory, the changed electric field excites a magnetic field, the changed magnetic field induces an electric field, and in this way, the alternating electric field and the magnetic field mutually excite and propagate outwards to form electromagnetic waves, when the internal element of the switch cabinet generates partial discharge on the grounding insulation, small part of the discharge energy is transferred to the metal armor of the cabinet body in the form of electromagnetic waves, the induction current is generated on the surface of the equipment, the wave impedance exists on the surface of the equipment, further a voltage is formed on the outer layer of the equipment, the outer layer of the equipment is grounded to the equipment due to the grounding of the cabinet body, the electromagnetic waves induce the high-frequency current on the outer surface of the switch cabinet, and the electric field induces the electric field, so that the pulse discharge signals can be detected by utilizing the capacitive coupling.
Specifically, the ultrasonic partial discharge detection method comprises the following steps:
b1, before detection starts, judging whether the background and detection point ultrasonic signals are normal or not through measurement of effective values, amplitude values, frequency correlations, phases and original waveforms of the background and detection point ultrasonic signals;
b2, if an abnormal signal exists, further analyzing and confirming whether the detected equipment has obvious defects or not so as to determine the reasons and positions of the defects;
b3, for suspected defects, intermittent and unstable abnormal signals, other different detection means such as ultrahigh frequency, infrared temperature measurement, analysis of decomposed substances, X-rays and the like can be utilized for auxiliary detection, and ultrasonic partial discharge detection has good detection effects on defects such as particles, suspension discharge, tip discharge, looseness, foreign matter impurities and the like.
Specifically, the surface temperature of equipment in the switch cabinet is obtained through a pre-calibrated range in a temperature matrix acquired by the thermal infrared imager, the sampling precision of the thermal infrared imager can reach +/-2 ℃, the problem that the installation position of the equipment is difficult to identify by the thermal infrared imager is solved, the specific hot spot of the equipment can be conveniently and timely judged, and precious time is striven for accurately judging and taking corresponding measures.
Specifically, k1=3.0 in the calculation formula; k2 =0.22; k3 =2.0; k3 =2.8, the K value in the calculation formula is set to 0.7, and the coefficient is derived from empirical data generated by experimental analysis.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (7)
1. The method for rapidly identifying the working state of the internal equipment of the high-voltage switch cabinet is characterized by comprising the steps of infrared temperature measurement, ground electric wave partial discharge detection and ultrasonic wave partial discharge detection, wherein the method for identifying the working state of the internal equipment of the high-voltage switch cabinet comprises the following steps:
s1, detecting the internal working state of a switch cabinet by adopting three detection modes of infrared temperature measurement, ground wave partial discharge detection and ultrasonic partial discharge detection;
s2, modeling the correlation between the surface temperature of the internal equipment of the switch cabinet in a specific range and the local discharge data of the transient ground wave by setting the daily timing of the online equipment;
s3, after the surface temperature measurement and transient ground electric wave partial discharge data of the internal equipment of the switch cabinet are obtained, recording the measurement data, wherein the recorded data are as follows:
surface temperature average temperature of equipment inside the switch cabinet: t (T) ave ；
The surface temperature of the internal equipment of the switch cabinet is highest: t (T) max ；
Surface temperature difference of equipment inside the switch cabinet: t (T) det ；
Transient ground wave partial discharge data of equipment in the switch cabinet: p is as follows;
transient ground wave partial discharge average data of equipment in the switch cabinet: p (P) ave ；
Ultrasonic partial discharge average data of internal equipment of switch cabinet: s is S ave ；
S4, when T det When the temperature is more than or equal to 5 ℃, the working state of equipment in the switch cabinet is abnormal, and a system gives a fault maintenance report;
s5, when (((P-P) ave )/ P ave ) 100 percent) is more than or equal to 20 percent, and when P is more than 6dB, the working state of the internal equipment of the switch cabinet is abnormal, and the system gives a fault maintenance report;
s6, under the condition that the two conditions are not met, judging by adopting the following calculation formula:
k=k 1 ×（T max -T ave ）/T ave +k 2 ×（1-（5-T det ）/5）+k 3 ×（P max -P ave ）/P ave +k 4 ×（S max -S ave ）/S ave ；
s7, when K is greater than or equal to K, the working state of equipment in the switch cabinet is abnormal, and a system gives a fault maintenance report.
2. The method for quickly identifying the working state of the internal equipment of the high-voltage switch cabinet according to claim 1, wherein the infrared temperature measurement is carried out on the surface temperature of the internal equipment of the switch cabinet by adopting a hand-held thermal imager.
3. The method for quickly identifying the working state of the internal equipment of the high-voltage switch cabinet according to claim 1, wherein the ground wave partial discharge detection method is as follows:
d1, setting test points on the front side and the rear side of the switch cabinet, and setting the test points on the side surface if the conditions are met;
d2, testing background noise in air and metal, selecting a metal object far away from the switch cabinet in the switch chamber when testing the metal background noise, placing a metal plate far away from the switch cabinet when testing the air background noise, and testing the sensor next to the metal plate;
d3, conventional detection is firstly used, and if abnormality is found in the conventional detection, positioning detection is further adopted for further confirmation;
and D4, in the result analysis, longitudinal analysis and transverse analysis can be adopted, in the detection process, if a less obvious abnormality is found, the test is carried out regularly and a record is formed for final analysis and comparison, and if the abnormality is found but the abnormality cannot be judged, the comparison and the confirmation can be carried out by detecting other switch cabinets in the same room.
4. The method for quickly identifying the working state of the internal equipment of the high-voltage switch cabinet according to claim 1, wherein the method for detecting the ultrasonic partial discharge is as follows:
b1, before detection starts, judging whether the background and detection point ultrasonic signals are normal or not through measurement of effective values, amplitude values, frequency correlations, phases and original waveforms of the background and detection point ultrasonic signals;
b2, if an abnormal signal exists, further analyzing and confirming whether the detected equipment has obvious defects or not so as to determine the reasons and positions of the defects;
b3, for suspected defects, intermittent and unstable abnormal signals, auxiliary detection is carried out by using other different detection means, such as ultrahigh frequency, infrared temperature measurement, analysis of decomposed products and detection means of X rays.
5. The method for quickly identifying the working state of the internal equipment of the high-voltage switch cabinet according to claim 1, wherein the surface temperature of the internal equipment of the switch cabinet is obtained through a pre-calibrated range in a temperature matrix acquired through a thermal infrared imager.
6. The method for quickly identifying the operation state of the internal equipment of the high-voltage switch cabinet according to claim 1, wherein k is calculated in the formula 1 =3.0；k 2 =0.22；k 3 =2.0；k 4 =2.8。
7. The method for quickly identifying the operation state of the internal equipment of the high-voltage switch cabinet according to claim 1, wherein the K value in the calculation formula is set to be 0.7.
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| EP4212838A1 (en) * | 2022-01-14 | 2023-07-19 | Abb Schweiz Ag | System for monitoring a switchgear |
| CN114692433B (en) * | 2022-04-28 | 2023-01-31 | 中原环保股份有限公司 | Fault analysis method for power distribution cabinet surface temperature inspection |
| CN116008685B (en) * | 2022-12-20 | 2023-10-03 | 大唐七台河发电有限责任公司 | Automatic overhaul method and system for power equipment |
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