CN114942075A - Power equipment fault detection and analysis method - Google Patents
Power equipment fault detection and analysis method Download PDFInfo
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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Abstract
The invention provides a fault detection and analysis method for power equipment, which belongs to the technical field of fault analysis and comprises the following steps: and acquiring a standard diagram of thermal imaging when each object to be measured is in a normal state according to the type of the power equipment. When the power equipment actually runs, the parameters are adjusted to the same condition as that when the standard diagram is obtained, and the current thermal imaging state diagrams of the multiple objects to be measured are shot. And comparing the temperature value corresponding to the state diagram with the temperature value in the standard diagram, and judging whether each object to be detected has a fault. The power equipment fault detection and analysis method provided by the invention provides credible data support for fault judgment of the object to be tested by determining the standard diagram, can quickly determine the state of the object to be tested on the basis of the standard diagram, and improves the accuracy of positioning the fault object to be tested and the monitoring efficiency.
Description
Technical Field
The invention belongs to the technical field of fault analysis, and particularly relates to a fault detection and analysis method for power equipment.
Background
With the rapid development of science and technology, the requirements for the power industry are gradually improved. At present, intelligent substations are vigorously developed in China, and a large data platform is constructed. Because the power equipment is in a running state for a long time, and simultaneously, under the influence of factors such as environment and the like, faults of different levels can be generated, so that certain harm is caused to the safety and stability of a power system, fault detection and analysis of the power equipment are very important in an intelligent power grid, effective monitoring is carried out on the power equipment of different types, and real-time and automatic analysis of whether the power equipment has faults, fault degree, fault positions, fault time prediction and the like is a hotspot of research.
The power equipment comprises a plurality of devices and components, the devices and the components can be collectively called as objects to be tested, the running state of the objects to be tested is judged by shooting a thermal imaging diagram in the prior art, but the thermal imaging diagram is easily influenced by the surrounding environment, temperature transmission can exist among the objects to be tested, the state of the objects to be tested cannot be effectively identified, and the failure analysis efficiency is low.
Disclosure of Invention
The invention aims to provide a fault detection and analysis method for power equipment, and aims to solve the problems that the state of an object to be detected cannot be effectively identified and the fault analysis efficiency is low.
In order to achieve the purpose, the invention adopts the technical scheme that: the method for detecting and analyzing the fault of the power equipment comprises the following steps:
acquiring a standard diagram of thermal imaging when each object to be measured is in a normal state according to the type of the power equipment;
when the power equipment actually runs, adjusting parameters to the same condition as that when the standard diagram is obtained, and shooting the current thermal imaging state diagrams of the multiple objects to be detected;
and comparing the temperature value corresponding to the state diagram with the temperature value in the standard diagram, and judging whether each object to be detected has a fault.
In a possible implementation manner, before the adjusting the parameters to the same condition as that when the standard chart is obtained, capturing the current thermal imaging state charts of the multiple objects to be tested further includes:
and when the object to be detected is judged to have a fault and the temperature of the object to be detected is the highest, checking the temperatures of other objects to be detected on the basis of the temperature of the object to be detected.
In a possible implementation manner, the checking the temperatures of the other objects to be measured based on the temperature of the object to be measured includes:
determining temperature attenuation rates to determine temperature attenuation values corresponding to different distances according to the current environment temperature by taking the object to be measured with the fault as the center of a circle;
and picking up other temperature values of the object to be measured in the state diagram, and subtracting the attenuation value on the basis of the temperature values to obtain the real temperature condition.
In a possible implementation manner, the acquiring a standard chart of thermal imaging when each object to be measured is in a normal state includes:
and picking up and recording a temperature standard value of each object to be detected in the standard diagram through the profile of each object to be detected, wherein the standard value is used for comparing with the temperature value in the state diagram.
In a possible implementation manner, the comparing the temperature value corresponding to the state diagram with the temperature value in the standard diagram includes:
and performing difference between the temperature value corresponding to the state diagram and the standard value, and judging the lifting condition of the temperature of each object to be detected according to the difference result.
In a possible implementation manner, the determining, according to the difference result, the temperature of each object to be measured to rise and fall includes:
and setting a judgment value for judging whether the object to be detected is normal, and if the absolute value obtained by subtracting the temperature value corresponding to the state diagram from the temperature value in the standard diagram is greater than the judgment value, the object to be detected has a fault.
In a possible implementation manner, before comparing the temperature value corresponding to the state diagram with the temperature value in the standard diagram, the method further includes:
and dividing the power equipment into areas, and judging the operating conditions of the objects to be tested in the areas by taking the areas as units.
In one possible implementation manner, the dividing the power equipment into regions, and determining the operating condition of each object to be measured belonging to the region by taking the region as a unit includes:
dividing the power equipment into the regions according to the principle of the flow direction of data and the transmission relation of electric energy;
and when a certain object to be detected in the area has a fault and is abnormal in temperature, detecting the object to be detected and the object to be detected positioned at the front end of the connection relation of the object to be detected.
In a possible implementation manner, after the detecting the object to be detected and the object to be detected located at the front end of the connection relation between the object to be detected, the method further includes:
and establishing a database, and searching a corresponding fault solution in the database according to the temperature change condition of each object to be detected in the same region.
In one possible implementation, the retrieving the corresponding failure solution in the database includes:
and taking the temperature condition of each object to be detected in the same region as a key word, properly expanding the range on the basis of the key word, and searching out the corresponding fault of the object to be detected from the database and solving the fault.
The method for detecting and analyzing the faults of the power equipment has the advantages that: compared with the prior art, the power equipment fault detection and analysis method provided by the invention has the advantages that the thermal imaging standard diagram of each object to be detected in a normal state is obtained according to the type of the power equipment.
When the power equipment is actually operated, a plurality of thermoforming pictures, namely state diagrams, of the objects to be tested under the same condition with the standard diagram are obtained through related instruments. And comparing the state diagram with the standard diagram, and comparing the temperature values of the two diagrams to judge whether the object to be detected is in a normal state or fails.
According to the method and the device, the standard diagram is determined, so that credible data support is provided for fault judgment of the object to be detected, the state of the object to be detected can be rapidly determined on the basis of the standard diagram, and the accuracy and the monitoring efficiency of positioning the fault object to be detected are improved.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a flowchart of a method for detecting and analyzing a fault of a power device according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, a method for detecting and analyzing a fault of a power device according to the present invention will now be described. The method for detecting and analyzing the faults of the power equipment comprises the following steps:
and acquiring a standard diagram of thermal imaging when each object to be measured is in a normal state according to the type of the power equipment.
When the power equipment actually runs, the parameters are adjusted to the condition the same as that when the standard diagram is obtained, and the current thermal imaging state diagrams of the plurality of objects to be measured are shot.
And comparing the temperature value corresponding to the state diagram with the temperature value in the standard diagram, and judging whether each object to be detected has a fault.
The method for detecting and analyzing the faults of the power equipment has the advantages that: compared with the prior art, the power equipment fault detection and analysis method provided by the invention has the advantages that the thermal imaging standard diagram of each object to be detected in a normal state is obtained according to the type of the power equipment.
When the power equipment is in actual operation, a plurality of objects to be tested are obtained through related instruments, and the thermoforming pictures, namely state diagrams, are in the same condition with the standard diagrams. And comparing the state diagram with the standard diagram, and comparing the temperature values of the two diagrams to judge whether the object to be detected is in a normal state or fails.
According to the method and the device, the standard diagram is determined, so that credible data support is provided for fault judgment of the object to be detected, the state of the object to be detected can be rapidly determined on the basis of the standard diagram, and the accuracy and the monitoring efficiency of positioning the fault object to be detected are improved.
The infrared thermal imaging technology is introduced into the power equipment defect diagnosis from the fifth and sixth decades in Sweden to play a remarkable role, and has become one of the most main methods for nondestructive defect diagnosis of equipment in the industries of power, petrifaction and the like due to the advantages of no power failure, no contact with tested equipment, high detection efficiency and the like.
Because the phenomenon that the temperature suddenly rises can occur when the high-voltage switchgear in the transformer substation has an insulation fault, the insulation defect of the high-voltage switchgear can be effectively found and diagnosed by adopting the infrared imaging state detection technology. The industrial application of the foreign thermal infrared imagers began in the middle of the 60's of the 20 th century, and the effects in fault diagnosis of electrical equipment were very remarkable; the electric power department in China successively develops discussion and research on relevant theories from the end of the 80 s in the 20 th century. In an electric power system, infrared radiation energy detected by a thermal infrared imager can reflect the temperature or thermal state change of relevant parts, and then defect signs of a plurality of electric devices and thermal energy power devices are discovered.
At present, electric power enterprises are actively promoting state maintenance work, thermal image processing technology of thermal infrared imagers is continuously improved, and the problems of remote continuous monitoring, unified monitoring, data accumulation, manual operation and the like are not solved in thermal infrared image detection, so that the functions of the thermal infrared imagers cannot be fully played. In recent years, a technology of fusing infrared temperature measurement and a transformer substation image monitoring system is developed, so that a remote infrared temperature measurement function is added on the basis of transformer substation image monitoring; and the use effect of the infrared and visible light fields is influenced because of different fields.
At present, power equipment can appear the phenomenon of local or a plurality of local high temperatures at the in-process that uses, and the reason that produces high temperature has screw looseness to lead to the unstable, the external rainwater of junction to lead to the corrosion of equipment etc. when power equipment appears overheated phenomenon, can lead to power equipment's trouble, the paralysis of whole electric wire netting even along with the temperature lasts the rising.
Therefore, the power patrol personnel can patrol by adopting the existing overheat fault detection equipment, and in the patrol process, the power patrol personnel can only see the temperature state diagram of the detected part of the power equipment through the overheat fault detection equipment. Because the thermal imaging display instrument in the overheat fault detection equipment only distinguishes the temperature through the colour, can not show specific position of generating heat, when electric power inspection personnel discover that the equipment somewhere temperature is too high at the in-process of patrolling and examining, when needing to carry out timely maintenance to it and handling, can not find specific position of generating heat fast accurately, can only judge the position of generating heat according to the experience of self, and then judge the reason of generating heat and maintain, work efficiency is low, and if the maintenance untimely can cause the safety problem even.
At present, the infrared thermal imaging of grid equipment patrols and examines mainly adopts traditional artifical off-line mode of patrolling and examining, patrol and examine the personnel and use the infrared thermal imager of hand-held type to carry out equipment operating temperature by the equipment and detect the back at the scene, the data are patrolled and examined in the manual record again, for example, equipment name, the equipment position, the equipment serial number, patrol and examine the result etc, patrol and examine and finish getting back to the office, again with infrared the patrolling and examining of record in the infrared thermal imager on data derivation to the computer, manual input is to appointed production management system software, waste time and energy, work efficiency is lower, and the easy data entry mistake scheduling problem that causes because the staff's carelessness appears.
Compared with the prior art, the thermal imaging technology-based power equipment fault detection method greatly improves the detection precision of thermal imaging, can more accurately position a faulted object to be detected, improves the application scene of the thermal imaging technology, and greatly improves the efficiency of detecting the power equipment.
The devices and the components contained in the power equipment are numerous, and in the normal use process, the devices and the components can emit heat, more importantly, all components on the electrical equipment are arranged tightly, so that much inconvenience and interference are caused for judging faults through thermal imaging.
More importantly, the generated thermal imaging map is easily affected by the ambient environment, if the ambient temperature is higher, the corresponding resistance is increased, after the resistance is increased, the temperature of the device or the component naturally rises, and the corresponding threshold value for detecting the temperature is required to be changed correspondingly.
In some embodiments of the power equipment fault detection and analysis method provided by the present application, in the case that the parameters are adjusted to be the same as those in the case of obtaining the standard diagram, before capturing the current thermal imaging state diagrams of the multiple objects to be measured, the method further includes:
and when the object to be detected is judged to have a fault and the temperature of the object to be detected is the highest, checking the temperatures of other objects to be detected on the basis of the temperature of the object to be detected.
In order to determine the temperature in the object to be measured in the power transformation device individually and effectively, the actual temperature of the single object to be measured, which is not influenced by the surrounding environment, is determined. The value of the temperature corresponding to the object to be measured is a judgment basis in the application, and if the temperature of one object to be measured is abnormal, the influence on the surrounding object to be measured is inevitable, and the temperature of the surrounding object to be measured is increased or reduced.
If the temperature of one object to be tested is abnormal, the temperature of other objects to be tested needs to be checked, and since the heat is emitted outwards in a radial manner, in order to more accurately determine the temperature value of the object to be tested, the embodiment is that if one object to be tested fails to cause the temperature abnormality, a range needs to be set by taking the failed object to be tested as the center of a circle and taking a certain radius as the circle, that is, other objects to be tested in the range are affected, and the closer to the failed object to be tested, the larger the amplitude needs to be checked, the farther away, the smaller the amplitude needs to be checked, and the farther away, the smaller the temperature influence is.
In some embodiments of the power equipment fault detection and analysis method provided in the present application, checking the temperature of another object to be measured based on the temperature of the object to be measured includes:
and determining the temperature attenuation rate to determine the temperature attenuation values corresponding to different distances by taking the object to be measured with the fault as the center of a circle according to the current environment temperature.
The temperature values of other objects to be measured are picked up in the state diagram, and the attenuation value is subtracted on the basis of the temperature values to be used as the real temperature condition.
For a detailed description, taking temperature rise as an example, if one object to be measured has a fault and the temperature is higher after the fault, a range circle is set with the object to be measured as a center of the circle, that is, the temperatures of other objects to be measured in the range circle are all affected, but the object to be measured at a longer distance is less affected.
In order to fit the real effect, the influence degree of the temperature along the radius direction with the center of the fault object to be measured is in a declining situation.
It is particularly noted that if the ambient temperature is low, the temperature decays faster, and if the ambient temperature is high, the temperature decays slower, so that it is necessary to set a different decay curve, on which different temperature decay values are provided for different distances, depending on the temperature in the current environment. The upper computer determines the attenuation value of the temperature according to the distance between the objects to be measured and the attenuation curve, and then subtracts the attenuation value on the basis of the temperature value detected in the state diagram to be used as the temperature of the objects to be measured.
In some embodiments of the power equipment fault detection and analysis method provided by the present application, obtaining a standard chart of thermal imaging when each object to be measured is in a normal state includes:
and picking up and recording the temperature standard value of each object to be measured in the standard diagram through the profile of each object to be measured, wherein the standard value is used for comparing with the temperature value in the state diagram.
The existing method sets a fault threshold according to the current environmental condition, namely, when the temperature of an object to be measured exceeds the threshold, the object to be measured is proved to have a fault. In the traditional method, during actual application, a maintenance worker shoots a thermal imaging image through equipment, an selecting frame can be arranged on the instrument in advance, or the outline of the thermal imaging image is picked up through an upper computer so as to calibrate corresponding objects to be tested in the power equipment one by one, and when the temperature of some objects to be tested is overhigh, the objects to be tested can be preliminarily judged to have faults.
Although the method is direct, the condition that the temperature of the object to be measured deviates from the normal condition cannot be judged, namely the degree of temperature change caused by the fault cannot be judged, and the fault troubleshooting efficiency of maintenance personnel is influenced to a certain extent.
In order to solve the above problem, in the present application, a standard diagram of temperature is generated according to a current power transformation device, each object to be measured in the standard diagram of temperature is in a normal state, and it is necessary to ensure that the temperature and parameters of the power device are in the same state as those when the standard diagram is obtained during actual comparison.
After the standard diagram is determined, the temperature value of each object to be measured in the current environment needs to be judged through the standard diagram by means of an upper computer and the like, and the standard value calibrated in the label diagram is used for judging whether the object to be measured is in a normal state or not.
In some embodiments of the power equipment fault detection and analysis method provided by the present application, comparing the temperature value corresponding to the state diagram with the temperature value in the standard diagram includes:
and (4) performing difference on the temperature value corresponding to the state diagram and the standard value, and judging the lifting condition of the temperature of each object to be detected according to the difference result.
In actual measurement, a maintenance worker can measure the power equipment on the spot to obtain a state diagram, and the temperature condition of each object to be measured under the same environment can be obtained by carrying out contour picking on the state diagram and carrying out temperature extraction through an upper computer.
Because the external temperature environments are the same, the state diagram and the standard diagram of the same object to be measured are subjected to subtraction, and therefore the temperature change degree of the object to be measured can be obtained. The temperature difference of most of the objects to be measured is possibly small, the temperature value of part of the state diagram of the objects to be measured is larger than that of the standard diagram, and the temperature value of part of the state diagram of the objects to be measured is smaller than that of the standard diagram.
For more convenient analysis, a color is set when the difference between two graphs is positive, a color is set when the difference is negative, and the same color is different in value and shade. By calibrating the temperature difference value by the method, the temperature change condition of the object to be measured can be visually shown to maintenance personnel.
In some embodiments of the power equipment fault detection and analysis method provided by the present application, determining the temperature rise and fall of each object to be measured according to the difference result includes:
and setting a judgment value for judging whether the object to be detected is normal, wherein if the absolute value obtained by subtracting the temperature value corresponding to the state diagram from the temperature value in the standard diagram is greater than the judgment value, the object to be detected has a fault.
In the prior art, a maintenance worker acquires a thermoforming state diagram of current power equipment through a thermal imager, and then judges whether a fault occurs according to the temperature of each device or component on the state diagram, but the analysis method has certain limitations, that is, the temperature of the component may not be greatly increased after the fault occurs, or the temperature of the related component is higher due to the influence of ambient temperature, but is still in a normal state at this time.
In order to accurately judge whether the object to be measured is normal or not, a plurality of reference rules are set in the application. Firstly, if the object to be tested is broken or the function of the object to be tested is lost due to faults, energy can not be input. At this time, the object to be measured at the corresponding position in the standard diagram has a temperature value, and the temperature value corresponding to the object to be measured in the state diagram is lower and even the same as the ambient temperature, and at this time, it can be determined that the object to be measured is in a fault state.
In order to perform analysis more intuitively, different determination values can be set for different objects to be measured, if the absolute value obtained by subtracting the temperature values corresponding to the state diagram and the standard diagram is greater than the determination value, the power equipment is determined to be in a fault state, and if the absolute value obtained by subtracting the temperature values corresponding to the state diagram and the standard diagram is less than the determination value, further observation is required.
In some embodiments of the power equipment fault detection and analysis method provided by the present application, before comparing the temperature value corresponding to the state diagram with the temperature value in the standard diagram, the method further includes:
the power equipment is divided into areas, and the operation condition of each object to be measured in the area is judged by taking the area as a unit.
Because the states of the objects to be measured during the fault are different, the temperature of the surface of part of the objects to be measured cannot change greatly even if the part of the objects to be measured fails, but other objects to be measured may be affected, that is, the temperature of other objects to be measured per se may change to a certain extent due to the abnormality of the access data and the like.
Most use whole power equipment to analyze among the prior art, if some determinand has broken down, but the temperature does not take place too big change, then need analyze other determinand that break down this moment, need the maintenance personnel to measure the determinand one by one, cause troubleshooting's efficiency lower to need consume a large amount of manpower and materials.
In order to solve the above problem, in the present application, the power equipment is first divided into areas, and normally, the power equipment is set in one area in a direct relationship. If all temperature conditions in one area are within a normal range, the object to be measured in the area is in a planned normal state, if the temperature of one object to be measured in the area is abnormal, the object to be measured may have a fault, and in order to perform detailed examination, the object to be measured in the whole area needs to be examined.
In some embodiments of the method for detecting and analyzing a fault of an electrical device provided by the present application, dividing the electrical device into regions, and determining the operating conditions of each object to be measured belonging to a region by using a region as a unit includes:
and dividing the power equipment into various areas according to the principle of the flow direction of data and the transmission relation of electric energy.
When a certain object to be measured in the area has a fault and the temperature is abnormal, the object to be measured and the object to be measured positioned at the front end of the connection relation of the object to be measured are detected.
In the present application, the regions are not divided according to the mounting positions, but are divided according to the relationships such as the data flow direction and the electric energy transmission, and therefore the outer contours of the divided regions are not regular in shape. More importantly, in the prior art, the thermal imaging camera is only used for individually testing each object to be tested, the transmission relationship between the objects to be tested is not considered, and the mutual influence between the objects to be tested is not considered, so that the normal temperature of the object to be tested is likely to be higher, and the temperature of the object to be tested with a fault is not greatly changed.
In order to solve the above problem, a plurality of regions are first divided according to the transmission relationship of data or electric energy, and after the state diagram is obtained, the state diagram is divided according to the relative position relationship of the plurality of regions. And after the division is finished, analyzing the temperature values corresponding to the multiple objects to be measured in the area respectively.
If the temperature performance of all the objects to be detected in one area meets the requirements, subsequent detection is not needed temporarily, if the temperature values in the part in one area are abnormal, the objects to be detected on the front side and the self are detected respectively according to the connection relation, and the analysis speed is greatly improved through the arrangement.
In some embodiments of the power equipment fault detection and analysis method provided by the present application, after detecting the object to be tested and the object to be tested located at the front end of the connection relationship between the object to be tested, the method further includes:
and establishing a database, and searching a corresponding fault solution in the database according to the temperature change condition of each object to be tested in the same area.
In the application, because the state diagram and the standard diagram are determined, the change condition of the object to be measured can be obtained by subtracting the corresponding temperature values in the two diagrams. If a specific object to be measured in a region has a fault, other objects to be measured in the region are also affected, so that the object to be measured can be rapidly judged to have the fault by summarizing and analyzing the change relation of the temperature of each object to be measured in the region, and the setting can be used for judging the fault of the object to be measured.
Therefore, a database can be established first, and the temperature change conditions of other objects to be measured in the whole area corresponding to the object to be measured in different areas when the object to be measured fails are stored in the database. And after the state diagram is subtracted from the standard diagram, if the temperature change degree of part of the object to be measured exceeds a specified standard, comparing all temperature change conditions in the area with the temperature change conditions in the data, and analyzing the specific position of the fault.
In some embodiments of the power equipment fault detection and analysis method provided by the present application, retrieving a corresponding fault solution from a database includes:
the temperature conditions of all the objects to be tested in the same area are used as keywords, the range is properly expanded on the basis of the keywords, and faults of the corresponding objects to be tested are searched from a database and a solution is provided.
And generating cases of different areas in the power equipment according to the content of the conventional troubleshooting records and the like, wherein each case comprises the temperature change values of other objects to be tested corresponding to different faults of the objects to be tested. In practical application, the temperature change of all the objects to be tested in an area is set as a keyword, and the temperature values corresponding to different environments have certain change, so that the temperature change can be changed within a certain range on the basis of each object to be tested, namely, cases falling into the range in a database can be used as a method for solving faults, and then the objects to be tested at corresponding positions are maintained according to the records in the cases.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The method for detecting and analyzing the fault of the power equipment is characterized by comprising the following steps:
acquiring a standard diagram of thermal imaging when each object to be measured is in a normal state according to the type of the power equipment;
when the power equipment actually runs, adjusting parameters to the same condition as that when the standard diagram is obtained, and shooting the current thermal imaging state diagrams of the multiple objects to be detected;
and comparing the temperature value corresponding to the state diagram with the temperature value in the standard diagram, and judging whether each object to be detected fails.
2. The method for detecting and analyzing faults of electric power equipment according to claim 1, wherein before the adjusting the parameters to be the same as the obtaining of the standard chart, the method for capturing the thermal imaging state charts of the plurality of objects to be tested further comprises:
and when the object to be detected is judged to have a fault and the temperature of the object to be detected is the highest, checking the temperatures of other objects to be detected on the basis of the temperature of the object to be detected.
3. The method for detecting and analyzing faults of electric power equipment as claimed in claim 2, wherein the checking the temperature of other objects to be tested based on the temperature of the object to be tested comprises:
determining temperature attenuation rates to determine temperature attenuation values corresponding to different distances according to the current environment temperature by taking the object to be measured with the fault as the center of a circle;
and picking up other temperature values of the object to be measured in the state diagram, and subtracting the attenuation value on the basis of the temperature values to obtain the real temperature condition.
4. The method for detecting and analyzing faults of power equipment according to claim 1, wherein the step of obtaining the standard chart of the thermal imaging when each object to be detected is in a normal state comprises the following steps:
and picking up and recording a temperature standard value of each object to be detected in the standard diagram through the profile of each object to be detected, wherein the standard value is used for comparing with the temperature value in the state diagram.
5. The method for detecting and analyzing faults of electric power equipment according to claim 4, wherein comparing the temperature values corresponding to the state diagram with the temperature values in the standard diagram includes:
and performing difference between the temperature value corresponding to the state diagram and the standard value, and judging the lifting condition of the temperature of each object to be detected according to the difference result.
6. The method for detecting and analyzing faults of electric power equipment as claimed in claim 5, wherein the step of judging the temperature rise and fall of each object to be tested according to the difference result comprises the following steps:
and setting a judgment value for judging whether the object to be detected is normal, and if the absolute value obtained by subtracting the temperature value corresponding to the state diagram from the temperature value in the standard diagram is greater than the judgment value, the object to be detected has a fault.
7. The method for detecting and analyzing faults of electric power equipment according to claim 6, wherein before comparing the temperature values corresponding to the state diagram with the temperature values in the standard diagram, the method further comprises:
and dividing the power equipment into areas, and judging the operating conditions of the objects to be tested in the areas by taking the areas as units.
8. The method for detecting and analyzing faults of electric power equipment according to claim 7, wherein the dividing of the electric power equipment into the areas and the judging of the operation conditions of the objects to be measured belonging to the areas by taking the areas as units comprises the following steps:
dividing the power equipment into the regions according to the principle of the flow direction of data and the transmission relation of electric energy;
and when a certain object to be detected in the area has a fault and is abnormal in temperature, detecting the object to be detected and the object to be detected positioned at the front end of the connection relation of the object to be detected.
9. The method for detecting and analyzing faults of electric power equipment according to claim 8, wherein after the detecting the object to be tested and the object to be tested positioned at the front end of the connection relation of the objects to be tested, the method further comprises:
and establishing a database, and searching a corresponding fault solution in the database according to the temperature change condition of each object to be detected in the same region.
10. The electrical device fault detection analysis method of claim 9, wherein retrieving a corresponding fault resolution in the database comprises:
and taking the temperature condition of each object to be detected in the same region as a key word, properly expanding the range on the basis of the key word, and searching out the corresponding fault of the object to be detected from the database and solving the fault.
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| CN202210770716.4A CN114942075A (en) | 2022-06-30 | 2022-06-30 | Power equipment fault detection and analysis method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115528810A (en) * | 2022-09-28 | 2022-12-27 | 杭州集联科技有限公司 | Temperature measurement data operation, inspection, analysis and management system based on power equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115528810A (en) * | 2022-09-28 | 2022-12-27 | 杭州集联科技有限公司 | Temperature measurement data operation, inspection, analysis and management system based on power equipment |
| CN115528810B (en) * | 2022-09-28 | 2024-03-26 | 杭州集联科技有限公司 | Temperature measurement data operation analysis management system based on power equipment |
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