CN117169638B - Transformer insulation paper aging degree detection method, system, equipment and storage medium - Google Patents
Transformer insulation paper aging degree detection method, system, equipment and storage medium Download PDFInfo
- Publication number
- CN117169638B CN117169638B CN202311443202.9A CN202311443202A CN117169638B CN 117169638 B CN117169638 B CN 117169638B CN 202311443202 A CN202311443202 A CN 202311443202A CN 117169638 B CN117169638 B CN 117169638B
- Authority
- CN
- China
- Prior art keywords
- aging
- aging degree
- degree
- transformer
- furfural content
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000032683 aging Effects 0.000 title claims abstract description 264
- 238000009413 insulation Methods 0.000 title claims abstract description 28
- 238000001514 detection method Methods 0.000 title claims abstract description 23
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 claims abstract description 315
- 238000000034 method Methods 0.000 claims abstract description 56
- 238000004364 calculation method Methods 0.000 claims abstract description 28
- 230000000875 corresponding effect Effects 0.000 claims description 35
- 238000012937 correction Methods 0.000 claims description 21
- 238000004590 computer program Methods 0.000 claims description 17
- 238000013461 design Methods 0.000 claims description 9
- 238000006116 polymerization reaction Methods 0.000 claims description 7
- 230000002596 correlated effect Effects 0.000 claims description 4
- 230000015556 catabolic process Effects 0.000 claims 1
- 238000006731 degradation reaction Methods 0.000 claims 1
- 230000008569 process Effects 0.000 description 15
- 238000012360 testing method Methods 0.000 description 10
- 238000004891 communication Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 101100518501 Mus musculus Spp1 gene Proteins 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Housings And Mounting Of Transformers (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The embodiment of the application provides a method, a system, equipment and a storage medium for detecting the aging degree of transformer insulation paper, wherein the method for detecting the aging degree of transformer insulation paper comprises the following steps: acquiring the current furfural content in the insulating oil, the historical working temperature of the transformer, and first and second running times, wherein the first running time is the total running time of the transformer, and the second running time is the running time of the transformer since the last time the insulating oil is replaced; determining a first aging degree of the insulating paper according to the historical working temperature and the first running time; correcting the value of the current furfural content according to the historical working temperature and the second running time to obtain a corrected value of the furfural content; determining a second aging degree of the insulating paper according to the corrected furfural content value; and carrying out weighted calculation on the first aging degree and the second aging degree to obtain the current aging degree of the insulating paper. According to the embodiment of the application, the accuracy of the detection result of the aging degree of the insulating paper can be improved.
Description
Technical Field
The application relates to the technical field of transformers, in particular to a method, a system, equipment and a storage medium for detecting ageing degree of insulating paper of a transformer.
Background
The transformer is common electrical equipment in the power system, and the transformer can be aged gradually in the operation process, so that the use safety is affected, and maintenance personnel can detect the ageing degree of the transformer regularly in practical application. For an oil-immersed transformer, transformer insulation paper is an important component in the transformer, and in the related art, the aging degree of the transformer insulation paper is usually indirectly detected by measuring the content of furfural in the insulation oil. However, the balance of the content of the furfural in the insulating oil needs to be maintained for a long time, and the ageing degree of the transformer insulating paper obtained directly according to the content of the furfural in the insulating oil often has the problem of inaccuracy under the scenes of short replacement period of the insulating oil and the like.
Disclosure of Invention
The embodiment of the application provides a method, a system, equipment and a storage medium for detecting the aging degree of transformer insulation paper, which are used for solving the problem that the result is inaccurate when the aging degree of the transformer insulation paper is directly obtained according to the furfural content in insulation oil in the related technology.
In order to solve the technical problems, the application is realized as follows:
in a first aspect, an embodiment of the present application provides a method for detecting an aging degree of insulating paper of a transformer, where the transformer includes insulating oil and insulating paper, and the method includes:
Acquiring the current furfural content in the insulating oil, the historical working temperature of the transformer, and first and second running times, wherein the first running time is the total running time of the transformer, and the second running time is the running time of the transformer since the last time the insulating oil is replaced;
determining a first aging degree of the insulating paper according to the historical working temperature and the first running time;
correcting the value of the current furfural content according to the historical working temperature and the second running time to obtain a corrected value of the furfural content;
determining a second aging degree of the insulating paper according to the corrected furfural content value;
and carrying out weighted calculation on the first aging degree and the second aging degree to obtain the current aging degree of the insulating paper.
In a second aspect, an embodiment of the present application further provides a device for detecting an aging degree of insulating paper of a transformer, including:
the first acquisition module is used for acquiring the current furfural content in the insulating oil, the historical working temperature of the transformer, the first running time and the second running time, wherein the first running time is the total running time of the transformer, and the second running time is the running time of the transformer after the insulating oil is replaced last time;
the first determining module is used for determining a first ageing degree of the insulating paper according to the historical working temperature and the first running time;
The correction module is used for correcting the value of the current furfural content according to the historical working temperature and the second running time to obtain a corrected value of the furfural content;
the second determining module is used for determining a second aging degree of the insulating paper according to the corrected furfural content value;
and the ageing degree calculation module is used for carrying out weighted calculation on the first ageing degree and the second ageing degree to obtain the current ageing degree of the insulating paper.
In a third aspect, embodiments of the present application further provide a transformer insulation paper aging degree detection system, including:
the temperature sensor is used for collecting the working temperature of the transformer;
the chromatograph is used for measuring the furfural content in the insulating oil;
and the processor is used for executing the method.
In a fourth aspect, embodiments of the present application further provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the method described above when executing the computer program.
In a fifth aspect, embodiments of the present application further provide a computer readable storage medium storing a computer program, where the computer program implements the method described above when executed by a processor.
According to the method for detecting the aging degree of the insulating paper of the transformer, the current furfural content in the insulating oil, the historical working temperature of the transformer, the first running time and the second running time are obtained, wherein the first running time is the total running time of the transformer, and the second running time is the running time of the transformer after the insulating oil is replaced last time; determining a first aging degree of the insulating paper according to the historical working temperature and the first running time; correcting the value of the current furfural content according to the historical working temperature and the second running time to obtain a corrected value of the furfural content; determining a second aging degree of the insulating paper according to the corrected furfural content value; and carrying out weighted calculation on the first aging degree and the second aging degree to obtain the current aging degree of the insulating paper. According to the embodiment of the application, the current aging degree of the insulating paper is calculated by combining the first aging degree and the second aging degree, so that the influence of factors such as the dynamic aging process of the insulating paper and the furfural content balancing process on the aging degree detection result of the insulating paper can be eliminated or reduced, and the aging degree detection result accuracy of the insulating paper is improved.
Drawings
Fig. 1 is a schematic flow chart of a method for detecting aging degree of transformer insulation paper according to an embodiment of the present application;
FIG. 2 is an exemplary graph of a linear relationship between corrected furfural content values and a second degree of aging of insulating paper;
fig. 3 is a schematic structural diagram of a transformer insulation paper aging degree detection device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a transformer insulation paper aging degree detection system according to an embodiment of the present application.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present application more apparent, the following detailed description will be given with reference to the accompanying drawings and the specific embodiments. In the following description, specific details such as specific configurations and components are provided merely to facilitate a thorough understanding of embodiments of the present application. It will therefore be apparent to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the application. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one.
The embodiment of the application provides a method for detecting the aging degree of insulating paper of a transformer, wherein the transformer can be an oil immersed transformer and comprises insulating oil and insulating paper. As shown in fig. 1, the method for detecting the aging degree of the transformer insulation paper may include:
step 101, acquiring the current furfural content in insulating oil, the historical working temperature of a transformer, a first running time and a second running time, wherein the first running time is the total running time of the transformer, and the second running time is the running time of the transformer since the last time the insulating oil is replaced;
step 102, determining a first aging degree of the insulating paper according to the historical working temperature and the first running time;
step 103, correcting the value of the current furfural content according to the historical working temperature and the second running time to obtain a corrected value of the furfural content;
104, determining a second aging degree of the insulating paper according to the corrected furfural content value;
and 105, weighting calculation is carried out on the first aging degree and the second aging degree to obtain the current aging degree of the insulating paper.
The method for detecting the aging degree of the transformer insulation paper provided in the embodiment can be applied to personal computers, mobile terminals, servers or industrial computers and other electronic devices, and is not particularly limited herein. For convenience of description, an electronic device will be described hereinafter as an example of an execution subject of the method.
In step 101, the electronic device may obtain information such as a current furfural content in the insulating oil, a historical operating temperature of the transformer, a first operating time, and a second operating time. The current furfural content can be measured by the existing furfural content measurement mode, and detailed description is omitted in this embodiment.
The historical operating temperature of the transformer can be obtained by providing a temperature sensor in the transformer. In combination with some examples, a communication module may be configured in the transformer, temperature information of the transformer detected by the temperature sensor may be sent to the electronic device in real time or periodically, the temperature information may be stored as a historical operating temperature in the electronic device, and the electronic device may directly read the historical operating temperature from the memory. In other examples, a memory and a communication interface may be provided in the transformer, temperature information detected by the temperature sensor may be stored in the memory, and the electronic device may read the historical operating temperature from the memory of the transformer through the access communication interface.
The first operation time may be a total operation time of the transformer, and the second operation time is a time that the transformer is operated since the last time the insulating oil was replaced. In combination with some application scenes, the transformer can periodically replace insulating oil, the time for replacing the insulating oil can be recorded in operation and maintenance information, and the electronic equipment can acquire the second operation time by reading the operation and maintenance information. Of course, it is readily understood that the second run time may be equal to the first run time for a transformer that is first put into service and has not been replaced with insulating oil.
In step 102, the electronic device may determine a first degree of aging of the insulating paper based on the historical operating temperature and the first run time. In general, the aging rate of the insulating paper is affected by the operating temperature of the transformer, and the higher the operating temperature of the transformer, the faster the aging rate of the insulating paper. In a possible embodiment, the first degree of aging may be quantitatively represented by a percentage or other form of parameter.
In some embodiments, through an insulation paper aging test, or by counting the operation big data of the similar transformers, the corresponding relation between the aging degree of the insulation paper and the operation time of the transformers in various working temperature environments can be obtained, and the corresponding relation can be experienced through a function or a table. Correspondingly, under the condition that the historical working temperature is obtained, temperature characteristic values such as an average value, a highest value or a mode of the historical working temperature can be counted, a corresponding insulating paper aging degree-running time corresponding relation is determined according to the temperature characteristic values, and then the first running time is substituted into the corresponding relation to obtain the first aging degree.
In other embodiments, the aging coefficients αi of different temperature intervals may also be obtained through the aging test or the big data statistics, where i is a number of the temperature interval, for example, 0 to 50 ℃ may correspond to a number 1, 50 to 60 ℃ may correspond to a number 2, and so on. From the historical operating temperature, the time t of the transformer operating in each temperature interval can be determined i The first degree of aging may be determined by (alpha) 1 t 1 +α 2 t 2 +α 3 t 3 +…+α i t i + …) is calculated by means of a model.
In step 103, the electronic device may correct the value of the current furfural content according to the historical operating temperature and the second operating time, so as to obtain a corrected value of the furfural content.
In general, a period of time is required for the furfural content in the insulating oil to reach equilibrium, and the duration of the period of time is affected by the working temperature of the transformer, and in general, the lower the working temperature of the transformer is, the longer the time for the furfural content to reach equilibrium is.
In some embodiments, the time for the furfural concentration to reach stability under various temperatures (hereinafter referred to as the stability time) may be determined by a test or a big data statistics, etc., and the stability time corresponding to the historical operating temperature may be determined in combination with the historical operating temperature obtained in step 101, for example, the stability time may be determined according to an average value, a highest value, or a mode isothermal characteristic value of the historical operating temperature. When the second running time is smaller than the stable time, the value of the current furfural content can be increased appropriately, for example, a correction value is added, or a correction coefficient is multiplied, so that the corrected value of the furfural content is obtained.
In step 104, the electronic device may determine the second aging degree of the insulating paper according to the corrected furfural content value, and in general, the furfural content in the insulating oil corresponds to the aging degree of the insulating paper, and similarly, in this step, the aging degree of the insulating paper may be obtained based on the corrected furfural content value, which corresponds to the second aging degree described above.
The method for determining the aging degree of the transformer insulating paper based on the furfural content in the insulating oil can adopt conventional means in the field, and specifically, the furfural content in the insulating oil and the aging degree of the insulating paper generally have a good linear relation. For example, the design life of the transformer is 20 years, and the following rules are obtained based on the statistics of the aging test data and the actual aging research data of the transformer: when the transformer is operated for 20 years, the furfural content in the insulating oil is generally 0.75mg/L. At this time, two points in the linear relationship can be determined: 1. when the furfural content in the insulating oil is 0, the aging degree of the insulating paper is 0; 2. when the furfural content in the insulating oil is 0.75mg/L, the aging degree of the insulating paper is 100%. Based on these two points, a functional expression of the linear relationship can be determined: AG2 = w/0.75, AG2 being the second degree of aging, w being the corrected furfural content value when the functional expression is applied in step 104. Accordingly, if the corrected furfural content value obtained in practical application is 0.3mg/L, the degree of aging of the insulating paper is 40%.
Of course, the above "when the transformer is operated for 20 years, the furfural content in the insulating oil is generally 0.75mg/L" is merely an exemplary illustration, in practical applications, the design life of different transformers may be different, the furfural content in the insulating oil may also be different when different transformers are operated to the time corresponding to the design life, and the above functional expression of the linear relationship may be modified according to the actual calibration result, for example, may be expressed as ag2=w/c, where c is the furfural content in the insulating oil when the transformer is operated to the design life, which is calibrated in advance.
Further, according to the aging test data and the actual aging study data, it is found that the linear relationship between the furfural content in the insulating oil and the aging degree of the insulating paper generally has a tendency of increasing slope with the increase of the service time, as shown in fig. 2, the linear relationship between the furfural content in the insulating oil and the aging degree of the insulating paper can be set to be substantially piecewise linear, and the piecewise linear relationship extends into the relationship between the corrected furfural content value and the second aging degree, and can be expressed as the following formula:
wherein AG2 is the second aging degree, w is the corrected furfural content value, (w) j ,ag j ) For pre-calibration parameters, the aging degree ag of the insulating paper marked when the furfural content is wj is expressed j J represents the segment sequence number of the linear relation of the segments, j is a positive integer less than or equal to D, D is the total number of segments of the preset linear relation, D is a positive integer, w 0 Sum ag 0 May be equal to 0 or set to other preset values.
Considering that the content of furfural in insulating oil needs to be balanced for a period of time, the embodiment can acquire the second running time of the transformer after the transformer is put into use for the first time or the insulating oil is replaced, can determine whether the content of furfural reaches the balance by combining the historical working temperature of the transformer, and can solve the problem that the detection result of the ageing degree of the insulating paper of the transformer is inaccurate due to the fact that the content of furfural does not reach the balance in the insulating oil to a certain extent by correcting the current content of furfural.
In step 105, the electronic device performs weighted calculation on the first aging degree and the second aging degree to obtain the current aging degree of the insulating paper.
The historical operating temperature of the transformer may affect not only the time for balancing the furfural content, but also the aging rate of the insulating paper of the transformer, and in consideration of the above, in step 105, the electronic device may determine the current aging degree of the insulating paper by combining the first aging degree and the second aging degree.
In the weighted calculation of the first aging degree and the second aging degree, the first aging degree and the second aging degree may have corresponding preset weighting coefficients respectively and are respectively recorded as η1 and η2, and the calculation formula of the current aging degree may be:
AGD=η1 × AG1+η2 × AG2
wherein AGD is the current aging degree, eta 1 is a preset weighting coefficient corresponding to the first aging degree, and eta 2 is a preset weighting coefficient corresponding to the second aging degree.
In practical application, η1 and η2 may be preset, and as one of possible calculation ideas, AG1 may be used as a reference value, and (AG 2-AG 1) is multiplied by a coefficient η and then superimposed on the reference value to obtain the current aging degree, where the formula is expressed as follows:
AGD= AG1+η×(AG2- AG1)
at this time, η1=1 to η, η2=η.
Of course, the above is an exemplary description of the preset weighting coefficients of the first aging degree and the second aging degree, and in practical application, the preset weighting coefficients may also be obtained by directly fitting related test data or practical aging research data.
Since the aging of the insulating paper is a dynamic process and is influenced by factors such as the working temperature of the transformer, the dynamic process can influence the balance process of the furfural content, and if the influence of the working temperature on the aging rate of the insulating paper and the balance time of the furfural content of the insulating oil is directly coupled to determine the current aging degree of the insulating paper, a large amount of test data or transformer operation data may be required to establish or fit a corresponding calculation model. In this embodiment, the influence of the working temperature on the ageing rate of the insulating paper and the balance time of the furfural content of the insulating oil can be decoupled, that is, the first ageing degree and the second ageing degree of the insulating paper are respectively determined, and then the current ageing degree of the insulating paper is obtained by combining the two ageing degrees and performing weighted calculation.
According to the method for detecting the aging degree of the insulating paper of the transformer, the current furfural content in the insulating oil, the historical working temperature of the transformer, the first running time and the second running time are obtained, wherein the first running time is the total running time of the transformer, and the second running time is the running time of the transformer after the insulating oil is replaced last time; determining a first aging degree of the insulating paper according to the historical working temperature and the first running time; correcting the value of the current furfural content according to the historical working temperature and the second running time to obtain a corrected value of the furfural content; determining a second aging degree of the insulating paper according to the corrected furfural content value; and carrying out weighted calculation on the first aging degree and the second aging degree to obtain the current aging degree of the insulating paper. According to the embodiment of the application, the current aging degree of the insulating paper is calculated by combining the first aging degree and the second aging degree, so that the influence of factors such as the dynamic aging process of the insulating paper and the furfural content balancing process on the aging degree detection result of the insulating paper can be eliminated or reduced, and the aging degree detection result accuracy of the insulating paper is improved.
As shown above, the embodiment of the application can also reduce the data processing amount required by building or fitting the related calculation model, make full use of the data of the historical working temperature of the transformer, and promote the feasibility of the method for detecting the ageing degree of the insulating paper of the transformer. In addition, in the input quantity required for detecting the ageing degree of the transformer insulation paper, the current furfural content, the historical working temperature of the transformer, the first running time and the second running time are all easy to obtain, and therefore the detection difficulty of the ageing degree of the transformer insulation paper is low.
Optionally, determining the first aging degree of the insulating paper according to the historical operating temperature and the first running time includes:
acquiring a corresponding relation between a preset temperature interval and an aging coefficient;
determining sub-operation time of the transformer in each preset temperature interval based on the historical operation temperature and the first operation time;
and determining a first aging degree according to the sub-operation time of each preset temperature interval and the aging coefficient corresponding to each preset temperature interval.
In this embodiment, the working temperature of the transformer may be divided into a plurality of preset temperature intervals, for example, the working temperature may be equally divided into 15 preset temperature intervals by taking the interval width of 0-150 ℃ as 10 ℃, or the working temperature may be equally divided into different preset temperature intervals, for example, the working temperature may be equally divided into one preset temperature interval of 0-80 ℃ and the working temperature may be equally divided into the intervals of 5 ℃ by taking the interval width of 80-150 ℃.
For convenience of explanation, the total number of preset temperature intervals may be denoted as n, an aging coefficient may be assigned to each preset temperature interval, and the aging coefficient of the ith preset temperature interval may be denoted as ki, where i is an integer less than or equal to n.
Each preset temperature interval may have a corresponding aging coefficient, and these corresponding relationships may be preset and stored in the electronic device.
For example, the preset temperature interval-aging coefficient correspondence relationship may be described by the following table:
wherein TP is 0 ，TP 1 ，…，TP n Is a preset temperature boundary value k 0 ，k 1 ，…，k n Is a preset aging coefficient.
By combining the historical working temperature and the first operation time, the operation time of the transformer in each preset temperature interval, namely the sub-operation time, can be counted. For example, the sub-run time of the ith preset temperature interval may be noted as t i 。
According to the sub-operation time of each preset temperature interval and the aging coefficient corresponding to each preset temperature interval, the first aging degree can be determined. In some embodiments, it is possible toIs determined as a first degree of aging, at which time k i The pre-calibration may be performed in match with the calculation mode. For example, the time spent by the transformer reaching 100% aging in each preset temperature interval can be counted, and the reciprocal of the spent time is taken as k corresponding to the preset temperature interval i Etc.
In yet other embodiments, the first degree of aging AG1 may be calculated by the following equation:
wherein i is the serial number of the preset temperature interval, n is the total number of the preset temperature intervals, and k i An aging coefficient corresponding to the ith preset temperature interval, t i DL is the design life of the transformer for the sub-run time of the ith preset temperature interval.
In combination with an example, in a first operation period, the transformer has 10000 hours of operation in a preset temperature interval of 60-80 ℃,8000 hours of operation in a preset temperature interval of 80-100 ℃,5000 hours of operation in a preset temperature interval of 100-120 ℃, and aging coefficients corresponding to the three preset temperature intervals are 0.8, 1 and 1.5 in sequence; the design life of the transformer is 10 ten thousand hours, and the first aging degree AG1 calculated according to the above formula is 23.5%. Of course, the above is some exemplary descriptions of the preset temperature interval and the aging coefficient, and the setting and calibration may be performed according to the needs in practical application.
In the above embodiment, the electronic device may relatively conveniently determine the first aging degree. In practical applications, the aging degree of the insulating paper may be further affected by other factors, such as working humidity and working voltage of the transformer, in order to further improve the rationality and accuracy of the determination result of the current aging degree, in some embodiments, the weighting calculation is performed on the first aging degree and the second aging degree to obtain the current aging degree of the insulating paper, which includes:
Acquiring target influence factors, wherein the target influence factors comprise at least one of historical working humidity of a transformer, historical working voltage of the transformer and replacement frequency of insulating oil;
correcting the first aging degree based on the target influence factors to obtain a third aging degree;
and carrying out weighted calculation on the third aging degree and the second aging degree to obtain the current aging degree of the insulating paper.
In one example, m target influencing factors may be considered in the process of obtaining the third aging degree based on correction, m is a positive integer, and the first target influencing factor may correspond to a correction coefficient beta l L is a positive integer less than or equal to m, and accordingly, at a third degree of aging, can be calculated as follows:
at this time, the degree of aging obtained by the formula (1) in the above embodiment may correspond to the first degree of aging in the present embodiment,and the method is used for correcting the first aging degree to obtain a third aging degree.
In combination with some examples, a humidity sensor may be disposed in the transformer to continuously monitor the humidity of the working environment of the transformer, which generally results in an increase in the water content of the insulating oil and an acceleration of the aging rate of the insulating paper if the transformer is operated in a high humidity environment for a long period of time, so that the historical working humidity of the transformer may be used as a target influencing factor and a coefficient greater than 1 may be given to correct the first aging degree.
Of course, the manner of correcting the first degree of aging based on the target influencing factor is not limited to the above, and in some possible embodiments, the target influencing factor may be also be calculated as an aging degree increment, and the aging degree increment may be added to the first degree of aging to obtain a third degree of aging, and so on, which is not illustrated herein. Correspondingly, in the calculation of the current aging degree of the insulating paper, the third aging degree considering more target influence factors is used, so that the calculation result of the current aging degree is more consistent with the actual aging condition of the insulating paper of the transformer, and the calculation precision is higher.
Optionally, correcting the value of the current furfural content according to the historical working temperature and the second running time to obtain a corrected value of the furfural content, including:
determining a third operation time required by balancing the furfural content in the insulating oil in combination with the historical operating temperature;
and under the condition that the second running time is smaller than the third running time, increasing the value of the current furfural content to obtain the value of the corrected furfural content.
Based on test data, immersing insulating paper with certain ageing degree into new insulating oil, gradually increasing the furfural content in the insulating oil until reaching an equilibrium state, gradually reducing the rate of increasing the furfural content along with time, and obtaining the two approximately exponentially functional relations by fitting a curve of the furfural content y-time t, for example:
y(t)=a(1-e -bt )（3）
Wherein a and b are coefficients, which can be obtained by test calibration.
Based on formula (3), during the test, when the furfural content y reaches the vicinity of a, or when the rate of change of the furfural content y is smaller than a preset value, it can be considered that the furfural content reaches equilibrium.
In general, the time required for the furfural content to reach balance is mainly influenced by the working temperature of the transformer, but the relationship with the aging degree of the insulating paper is not great, in the calibration process, the time required for the furfural content to reach balance in the insulating oil can be calibrated at various temperatures, and the corresponding calibration result can be applied in the determination process of the third running time.
In this embodiment, the third operating time required for the furfural content to reach equilibrium in the insulating oil may be determined in combination with the historical operating temperature. In some examples, the temperature average value, the temperature median value and the like may be obtained according to the historical operating temperature, and the electronic device may determine the third running time corresponding to the temperature characteristic value according to the temperature characteristic value and the calibration result.
In the case that the second operation time is smaller than the third operation time, it is indicated that the current furfural content has not reached equilibrium, and therefore, in this embodiment, the corrected value of the furfural content may be obtained by increasing the value of the current furfural content.
The process of increasing the value of the current furfural content can be regarded as a correction process of the current furfural content. In some embodiments, increasing the value of the current furfural content may be achieved by simply adding an increment of furfural content, or multiplying by a coefficient greater than 1.
In other possible embodiments, the above formula (3) may also be fitted in combination with the second running time, the current furfural content and the third running time to obtain a specific a value, and the specific a value is used as a corrected furfural content value. Specifically, the second operation time is T2, the third operation time is T3, the current furfural content is y2, the standard that the furfural content reaches balance in the insulating oil is y' (i.e. the derivative of y (T) with respect to time T) is equal to a preset value Δy, and then:
y (T2) =y2 and y' (T3) =Δy.
And solving based on the constraint, obtaining a value of a, and taking the value of a as a corrected furfural content value.
By the processing mode, the influence of the current furfural content in the insulating oil, which is not balanced, on the second aging degree detection result can be reduced, and the detection accuracy of the current aging degree of the insulating paper is improved.
In some embodiments, increasing the value of the current furfural content to obtain a corrected furfural content value in the event that the second run time is less than the third run time comprises:
Determining a furfural content correction amount according to the difference value between the third running time and the second running time, wherein the furfural content correction amount is positively correlated with the difference value;
and determining the sum of the current furfural content and the furfural content correction amount as a corrected furfural content value.
In combination with the above description, the curve of the furfural content y-time t can be in an exponential function relationship, and the variation degree of the furfural content with time is smaller in a time period approaching the equilibrium of the furfural content. Generally, the detection of the current furfural content is performed after a period of time elapses after the insulating oil is replaced, and the detection time also generally falls after a period of time in which the change degree of the furfural content with time is small, so in some possible embodiments, the furfural content y-time t may be approximately determined as a linear relationship, and the furfural content correction amount is determined in combination with the difference value between the third running time and the second running time, so as to reduce the difficulty in obtaining the furfural content correction amount and improve the calculation rate of the corrected furfural content value.
Of course, in other possible embodiments, the furfural content y-time T may be nonlinear, but in general, it may be ensured that the furfural content correction is positively correlated with the difference (T3-T2) so that the corrected furfural content value matches the current aging level of the insulating paper more.
Optionally, after determining the third run time required for the furfural content to reach equilibrium in the insulating oil in combination with the historical operating temperature, the method further comprises:
and determining the current furfural content as a corrected furfural content value under the condition that the second running time is greater than or equal to the third running time.
In this embodiment, when the second running time is greater than or equal to the third running time, the current furfural content can be considered to reach an equilibrium state in the insulating oil, so that the current furfural content can be directly determined as a corrected furfural content value, the calculated amount is saved, and the current aging degree determination efficiency of the insulating paper is improved.
Optionally, after the weighting calculation is performed on the first aging degree and the second aging degree to obtain the current aging degree of the insulating paper, the method further includes:
acquiring the actual aging degree of the insulating paper obtained by detecting the polymerization degree of the insulating paper;
updating weights corresponding to the first aging degree and the second aging degree respectively according to the actual aging degree and the current aging degree, wherein the updated weights are used for detecting the aging degree of the insulating paper next time.
Measuring the degree of polymerization of insulating paper of a transformer is a relatively reliable means for determining the degree of aging of a transformer, the degree of polymerization of insulating paper directly reflects the degree of aging, and a specific detection mode belongs to the prior art and is not specifically described herein.
The detection process of the polymerization degree of the insulating paper is inconvenient, but the accuracy of the aging degree obtained by detection is high, so that in the service cycle of the transformer, if the polymerization degree of the insulating paper is detected, the obtained detection result of the aging degree can be regarded as the actual aging degree, the calculation model mentioned in the embodiment is updated based on the actual aging degree, specifically in the embodiment, the weight corresponding to the first aging degree and the second aging degree respectively can be updated based on the actual aging degree, and the updated weight is used for detecting the aging degree of the insulating paper next time, so that the accuracy of detecting the aging degree of the insulating paper based on the furfural content in the insulating oil can be improved.
As shown in fig. 3, the embodiment of the application further provides a device for detecting the aging degree of the insulating paper of the transformer, which includes:
the first obtaining module 201 is configured to obtain a current furfural content in the insulating oil, a historical operating temperature of the transformer, a first operating time and a second operating time, where the first operating time is a total operating time of the transformer, and the second operating time is a time that the transformer operates since the insulating oil was replaced last time;
A first determining module 202 for determining a first aging degree of the insulating paper according to the historical operating temperature and the first running time;
the correction module 203 is configured to correct the value of the current furfural content according to the historical operating temperature and the second operating time, so as to obtain a corrected value of the furfural content;
a second determining module 204, configured to determine a second aging degree of the insulating paper according to the corrected furfural content value;
the ageing degree calculating module 205 is configured to perform weighted calculation on the first ageing degree and the second ageing degree, so as to obtain a current ageing degree of the insulating paper.
Alternatively, the first determining module 202 may be specifically configured to:
acquiring a corresponding relation between a preset temperature interval and an aging coefficient;
determining sub-operation time of the transformer in each preset temperature interval based on the historical operation temperature and the first operation time;
and determining a first aging degree according to the sub-operation time of each preset temperature interval and the aging coefficient corresponding to each preset temperature interval.
Alternatively, the first determination module 202 may be configured to:
the first aging degree AG1 is calculated by the following formula:
wherein i is the serial number of the preset temperature interval, n is the total number of the preset temperature intervals, and k i An aging coefficient corresponding to the ith preset temperature interval, t i DL is the design life of the transformer for the sub-run time of the ith preset temperature interval.
Alternatively, the aging degree calculation module 205 may be configured to:
acquiring target influence factors, wherein the target influence factors comprise at least one of historical working humidity of a transformer, historical working voltage of the transformer and replacement frequency of insulating oil;
correcting the first aging degree based on the target influence factors to obtain a third aging degree;
and carrying out weighted calculation on the third aging degree and the second aging degree to obtain the current aging degree of the insulating paper.
Alternatively, the correction module 203 may be specifically configured to: determining a third operation time required by balancing the furfural content in the insulating oil in combination with the historical operating temperature; and under the condition that the second running time is smaller than the third running time, increasing the value of the current furfural content to obtain the value of the corrected furfural content. Meanwhile, the correction module 203 may also be configured to: determining a furfural content correction amount according to the difference value between the third running time and the second running time, wherein the furfural content correction amount is positively correlated with the difference value; and determining the sum of the current furfural content and the furfural content correction amount as a corrected furfural content value.
Optionally, the transformer insulation paper aging degree detection device may further include: and the third determining module is used for determining the current furfural content as a corrected furfural content value under the condition that the second running time is greater than or equal to the third running time. Meanwhile, the device for detecting the aging degree of the insulating paper of the transformer can also comprise: the second acquisition module is used for acquiring the actual aging degree of the insulating paper, which is obtained by detecting the polymerization degree of the insulating paper; the updating module is used for updating weights corresponding to the first aging degree and the second aging degree respectively according to the actual aging degree and the current aging degree, and the updated weights are used for detecting the aging degree of the insulating paper next time.
The device for detecting the aging degree of the transformer insulation paper provided by the embodiment of the application is the device authority corresponding to the method for detecting the aging degree of the transformer insulation paper in the above embodiment, and the method embodiment can be applied to the device embodiment and achieve the same technical effects, and is not repeated here.
As shown in fig. 4, the embodiment of the present application further provides a system for detecting the aging degree of insulating paper of a transformer, including:
a temperature sensor 301 for acquiring an operating temperature of the transformer;
A chromatograph 302 for measuring the furfural content in the insulating oil;
and a processor 303 for executing the transformer insulation paper aging degree detection method.
In this embodiment, the temperature sensor 301 may continuously collect the operating temperature of the transformer, and may be stored in a memory located at the transformer, and the processor copies the operating temperature through an interface in the memory, or the temperature sensor 301 continuously sends the collected operating temperature to the processor 303 through the communication module. The historical operating temperature it acquires may be continuously acquired by the temperature sensor 301 for the processor.
The chromatograph 302 may be a high performance liquid chromatograph or the like, and may be used to measure the furfural content in the insulating oil, and accordingly, the current furfural content may be measured by the chromatograph 302.
The processor 303 may be configured to perform the transformer insulation paper aging degree detection method described above. The implementation process and the obtained effect of the related method may be added to the description of the above method embodiments, which are not repeated here.
The embodiment of the application also provides electronic equipment, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the method for detecting the aging degree of the transformer insulation paper is realized when the processor executes the computer program.
The embodiment of the application also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program realizes the method for detecting the aging degree of the transformer insulation paper when being executed by a processor.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other manners. For example, the apparatus/terminal device embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present application may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, where the computer program, when executed by a processor, may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, executable files or in some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (8)
1. A method for detecting the aging degree of insulating paper of a transformer, wherein the transformer comprises insulating oil and insulating paper, the method comprising:
acquiring the current furfural content in the insulating oil, the historical working temperature of the transformer, a first running time and a second running time, wherein the first running time is the total running time of the transformer, and the second running time is the running time of the transformer after the insulating oil is replaced last time;
determining a first degree of aging of the insulating paper based on the historical operating temperature and the first run time;
correcting the value of the current furfural content according to the historical working temperature and the second running time to obtain a corrected value of the furfural content;
Determining a second aging degree of the insulating paper according to the corrected furfural content value;
weighting calculation is carried out on the first aging degree and the second aging degree to obtain the current aging degree of the insulating paper;
determining a first degree of aging of the insulating paper based on the historical operating temperature and the first run time, comprising:
acquiring a corresponding relation between a preset temperature interval and an aging coefficient;
determining sub-operation time of the transformer in each preset temperature interval based on the historical operation temperature and the first operation time;
determining the first aging degree according to the sub-operation time of each preset temperature interval and the aging coefficient corresponding to each preset temperature interval; comprising the following steps:
the first aging degree AG1 is calculated by the following formula:
wherein i is the serial number of the preset temperature interval, n is the total number of the preset temperature intervals, and k i An aging coefficient corresponding to the ith preset temperature interval, t i For the ith preset temperatureSub-run time of the degree interval, DL, is the design life of the transformer;
the second aging degree AG2 is calculated by the following formula:
wherein w is a corrected furfural content value, (w) j ,ag j ) For pre-calibrated parameters, the furfural content is represented as w j Time-calibrated aging degree ag of insulating paper j J expresses the segment sequence number of the segment linear relation, j is a positive integer less than or equal to D, D is the total segment number of the segment of the preset linear relation, and D is the positive integer;
the current aging degree is calculated by the following formula:
AGD=η1 × AG1+η2 × AG2；
wherein AGD is the current aging degree, η1 is a preset weighting coefficient corresponding to the first aging degree, and η2 is a preset weighting coefficient corresponding to the second aging degree.
2. The method of claim 1, wherein weighting the first and second degrees of aging to obtain a current degree of aging of the insulating paper comprises:
acquiring target influence factors, wherein the target influence factors comprise at least one of historical working humidity of the transformer, historical working voltage of the transformer and replacement frequency of the insulating oil;
correcting the first aging degree based on the target influence factors to obtain a third aging degree;
and carrying out weighted calculation on the third aging degree and the second aging degree to obtain the current aging degree of the insulating paper.
3. The method of claim 1, wherein modifying the value of the current furfural content based on the historical operating temperature and the second run time to obtain a modified furfural content value comprises:
determining a third running time required for balancing the furfural content in the insulating oil by combining the historical working temperature;
and under the condition that the second running time is smaller than the third running time, increasing the value of the current furfural content to obtain the corrected furfural content value.
4. A method according to claim 3, wherein increasing the value of the current furfural content in the case where the second run time is less than the third run time results in the corrected furfural content value, comprising:
determining a furfural content correction according to the difference between the third running time and the second running time, wherein the furfural content correction is positively correlated with the difference;
and determining the sum value of the current furfural content and the furfural content correction amount as the corrected furfural content value.
5. The method of claim 1, wherein after weighting the first and second degrees of aging to obtain the current degree of aging of the insulating paper, the method further comprises:
Acquiring the actual aging degree of the insulating paper, which is obtained by detecting the polymerization degree of the insulating paper;
updating weights corresponding to the first aging degree and the second aging degree respectively according to the actual aging degree and the current aging degree, wherein the updated weights are used for detecting the aging degree of the insulating paper next time.
6. A transformer insulation paper degradation degree detection system, characterized by comprising:
the temperature sensor is used for collecting the working temperature of the transformer;
the chromatograph is used for measuring the furfural content in the insulating oil;
a processor for performing the method of any one of claims 1 to 5.
7. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the method of any one of claims 1 to 5 when executing the computer program.
8. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed by a processor, implements the method according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311443202.9A CN117169638B (en) | 2023-11-02 | 2023-11-02 | Transformer insulation paper aging degree detection method, system, equipment and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311443202.9A CN117169638B (en) | 2023-11-02 | 2023-11-02 | Transformer insulation paper aging degree detection method, system, equipment and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117169638A CN117169638A (en) | 2023-12-05 |
| CN117169638B true CN117169638B (en) | 2024-01-12 |
Family
ID=88943532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311443202.9A Active CN117169638B (en) | 2023-11-02 | 2023-11-02 | Transformer insulation paper aging degree detection method, system, equipment and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117169638B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005214695A (en) * | 2004-01-28 | 2005-08-11 | Fujitsu Ltd | Burn-in time control method and device |
| JP2010038787A (en) * | 2008-08-06 | 2010-02-18 | Midori Anzen Co Ltd | Insulation monitoring device |
| CN105510469A (en) * | 2015-12-16 | 2016-04-20 | 国网山东省电力公司电力科学研究院 | Detection method for content of furfural in transformer insulation paper |
| CN107656181A (en) * | 2017-09-26 | 2018-02-02 | 福州大学 | A kind of method of quantitative Diagnosis paper oil insulation degree of aging |
| CN109211760A (en) * | 2018-08-24 | 2019-01-15 | 西南交通大学 | A kind of experimental method of transformer insulated dry optimizing research |
| DE102018005797A1 (en) * | 2018-07-23 | 2019-03-07 | Daimler Ag | A method of estimating the time required for a full charge of a rechargeable electrochemical energy storage device |
| CN111859839A (en) * | 2019-04-12 | 2020-10-30 | 华北电力大学 | High-temperature reverse bias aging time conversion method for crimping type insulated gate bipolar transistor |
| CN114578248A (en) * | 2020-12-02 | 2022-06-03 | 罗伯特·博世有限公司 | Method and device for predicting the aging state of a device battery in a battery-operated device |
| CN116455953A (en) * | 2023-03-12 | 2023-07-18 | 天翼云科技有限公司 | Message-triggered session aging method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6820029B2 (en) * | 2000-12-22 | 2004-11-16 | United Microelectronics Corp. | Method for determining failure rate and selecting best burn-in time |
-
2023
- 2023-11-02 CN CN202311443202.9A patent/CN117169638B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005214695A (en) * | 2004-01-28 | 2005-08-11 | Fujitsu Ltd | Burn-in time control method and device |
| JP2010038787A (en) * | 2008-08-06 | 2010-02-18 | Midori Anzen Co Ltd | Insulation monitoring device |
| CN105510469A (en) * | 2015-12-16 | 2016-04-20 | 国网山东省电力公司电力科学研究院 | Detection method for content of furfural in transformer insulation paper |
| CN107656181A (en) * | 2017-09-26 | 2018-02-02 | 福州大学 | A kind of method of quantitative Diagnosis paper oil insulation degree of aging |
| DE102018005797A1 (en) * | 2018-07-23 | 2019-03-07 | Daimler Ag | A method of estimating the time required for a full charge of a rechargeable electrochemical energy storage device |
| CN109211760A (en) * | 2018-08-24 | 2019-01-15 | 西南交通大学 | A kind of experimental method of transformer insulated dry optimizing research |
| CN111859839A (en) * | 2019-04-12 | 2020-10-30 | 华北电力大学 | High-temperature reverse bias aging time conversion method for crimping type insulated gate bipolar transistor |
| CN114578248A (en) * | 2020-12-02 | 2022-06-03 | 罗伯特·博世有限公司 | Method and device for predicting the aging state of a device battery in a battery-operated device |
| CN116455953A (en) * | 2023-03-12 | 2023-07-18 | 天翼云科技有限公司 | Message-triggered session aging method |
Non-Patent Citations (1)
| Title |
|---|
| 基于健康指数的变压器剩余寿命评估;李喜桂;常燕;罗运柏;宋斌;;高压电器(第12期);86-9186-91 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117169638A (en) | 2023-12-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110646466B (en) | Calibration method, system and equipment of semiconductor type gas sensor | |
| US20090132194A1 (en) | Method for Function Monitoring of a Sensor | |
| WO2017038749A1 (en) | Degradation diagnosis device, degradation diagnosis method, and degradation diagnosis system for batteries | |
| JP2018169161A (en) | Deterioration diagnosis apparatus, deterioration diagnosis method, and deterioration diagnosis system for battery | |
| CN108696368B (en) | Network element health state detection method and equipment | |
| EP4133294A1 (en) | Probabilistic determination of transformer end of life | |
| CN110728008B (en) | Method and device for determining expected service life of intelligent ammeter | |
| CN115953074A (en) | Thermal power carbon emission accounting method based on polynomial fitting and application thereof | |
| CN116345700A (en) | Energy consumption monitoring method and monitoring system for energy storage power station | |
| CN117169638B (en) | Transformer insulation paper aging degree detection method, system, equipment and storage medium | |
| CN113866708B (en) | Electric energy meter metering error analysis method based on intelligent circuit breaker | |
| CN116771611A (en) | Wind turbine generator power monitoring method and device | |
| CN112067166A (en) | Thermal resistor checking method | |
| CN112444671A (en) | Electric energy metering method and device of electric energy meter based on instantaneous power and storage medium | |
| CN111413564A (en) | Supercapacitor failure early warning method, system and equipment | |
| US20230280320A1 (en) | System and method of calibrating sensing instruments | |
| CN115112521B (en) | Tea moisture determination error compensation method, system, electronic device and storage medium | |
| JP7314969B2 (en) | Zirconia oxygen concentration meter maintenance method, maintenance system, and zirconia oxygen concentration meter | |
| CN117148020B (en) | Service life detection method of electronic product and terminal equipment | |
| CN114741905B (en) | Actually measured energy consumption data correction method and device, electronic equipment and storage medium | |
| CN113109642B (en) | Method and system for processing power quality signal data | |
| CN112260900B (en) | Method, device and equipment for measuring energy consumption of communication equipment and storage medium | |
| CN117254772B (en) | Data processing method and system based on electric energy metering device | |
| WO2023063044A1 (en) | Measured temperature coefficient correction device and measured temperature coefficient correction program | |
| CN117371670B (en) | Reliability analysis system of new energy electric automobile fills electric pile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |