A temperature rise value determination method, apparatus, device, and storage medium

Abstract

The application discloses a temperature rise value determination method, device and equipment and a storage medium. The method comprises the following steps: acquiring a current load rate and a current running time of a target oil-immersed transformer; acquiring a target fitting function corresponding to a target position in the target oil-immersed transformer, the target fitting function being used for representing a change relationship between a temperature rise value corresponding to the target position in the target oil-immersed transformer and the running time and the load rate, and the target fitting function being determined in advance based on a plurality of target position infrared images collected when the target oil-immersed transformer runs at a plurality of reference load rates; and determining the target temperature rise value corresponding to the target position in the target oil-immersed transformer based on the current load rate, the current running time and the target fitting function. Through the technical scheme of the embodiment of the application, repeated temperature rise detection can be avoided, so that the temperature rise value of the oil-immersed transformer running at any load rate can be quickly determined, and the temperature rise detection efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of computer technology, and in particular to a method, apparatus, device, and storage medium for determining temperature rise value. Background Technology

[0002] Oil-immersed transformers are typically used to reduce 10kV or 35kV grid voltage to the 230V or 400V bus voltage used by users. Before an oil-immersed transformer is put into service, its performance can be determined through temperature rise testing. Temperature rise testing can be used to determine the temperature rise value of the oil-immersed transformer under rated capacity operating conditions.

[0003] Currently, existing temperature rise detection methods can often obtain the temperature rise value of an oil-immersed transformer at discrete moments under a certain load rate. However, this method requires repeated temperature rise detection for different load rates, which reduces the efficiency of temperature rise detection. Summary of the Invention

[0004] This invention provides a method, apparatus, device, and storage medium for determining temperature rise value, thereby avoiding repeated temperature rise detection and enabling rapid determination of the temperature rise value of an oil-immersed transformer operating at any load rate, thus improving the efficiency of temperature rise detection.

[0005] According to one aspect of the present invention, a method for determining a temperature rise value is provided, the method comprising:

[0006] Obtain the current load rate and current operating time of the target oil-immersed transformer;

[0007] Obtain the target fitting function corresponding to the target part in the target oil-immersed transformer. The target fitting function is used to characterize the relationship between the temperature rise value corresponding to the target part in the target oil-immersed transformer and the operating time and load rate. The target fitting function is determined in advance based on multiple infrared images of the target part collected when the target oil-immersed transformer is operating at multiple reference load rates.

[0008] Based on the current load rate, the current operating time, and the target fitting function, the target temperature rise value corresponding to the target part in the target oil-immersed transformer is determined.

[0009] According to another aspect of the present invention, a temperature rise determination apparatus is provided, the apparatus comprising:

[0010] The current load rate acquisition module is used to obtain the current load rate and current operating time of the target oil-immersed transformer.

[0011] The target fitting function acquisition module is used to acquire the target fitting function corresponding to the target part in the target oil-immersed transformer. The target fitting function is used to characterize the relationship between the temperature rise value corresponding to the target part in the target oil-immersed transformer and the operating time and load rate. The target fitting function is determined in advance based on multiple infrared images of the target parts collected when the target oil-immersed transformer is operating at multiple reference load rates.

[0012] The target temperature rise determination module is used to determine the target temperature rise value corresponding to the target part in the target oil-immersed transformer based on the current load rate, the current operating time, and the target fitting function.

[0013] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0014] At least one processor; and

[0015] A memory communicatively connected to the at least one processor; wherein,

[0016] The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the temperature rise determination method according to any embodiment of the present invention.

[0017] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the temperature rise determination method according to any embodiment of the present invention.

[0018] The technical solution of this invention obtains the current load rate and current operating time of the target oil-immersed transformer; obtains a target fitting function corresponding to the target part of the target oil-immersed transformer, the target fitting function being used to characterize the relationship between the temperature rise value corresponding to the target part of the target oil-immersed transformer and the operating time and load rate, the target fitting function being pre-determined based on multiple infrared images of the target part collected under multiple reference load rates; and determines the target temperature rise value corresponding to the target part of the target oil-immersed transformer based on the current load rate, the current operating time, and the target fitting function. This achieves the determination of the temperature rise value corresponding to the target part of the target oil-immersed transformer at any operating time under multiple load rates based on a pre-fitted target fitting function, avoiding repeated temperature rise detection for different load rates, and thus quickly determining the temperature rise value of the oil-immersed transformer under any load rate, improving temperature rise detection efficiency.

[0019] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart of a method for determining temperature rise value according to Embodiment 1 of the present invention;

[0022] Figure 2 This is an example diagram of a target oil-immersed transformer according to Embodiment 1 of the present invention;

[0023] Figure 3 This is a flowchart of a method for determining a target fitting function according to Embodiment 2 of the present invention;

[0024] Figure 4 This is an example diagram of an infrared image of a target area according to Embodiment 2 of the present invention;

[0025] Figure 5 This is a flowchart of a method for determining a target fitting function according to Embodiment 3 of the present invention;

[0026] Figure 6 This is an example diagram of the fitting curve corresponding to a second fitting function involved in Embodiment 3 of the present invention;

[0027] Figure 7 This is an example diagram of the fitting curve corresponding to a third fitting function involved in Embodiment 3 of the present invention;

[0028] Figure 8 This is a schematic diagram of a temperature rise determination device according to Embodiment 4 of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of an electronic device that implements the temperature rise value determination method of the present invention. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] Example 1

[0033] Figure 1 This is a flowchart illustrating a method for determining temperature rise values ​​according to Embodiment 1 of the present invention. This embodiment is applicable to determining the temperature rise values ​​of key components in an oil-immersed transformer at any time under different load rates. This method can be executed by a temperature rise value determining device, which can be implemented in hardware and / or software and can be configured in an electronic device. Figure 1 As shown, the method includes:

[0034] S110. Obtain the current load rate and current operating time of the target oil-immersed transformer.

[0035] The target oil-immersed transformer can refer to an oil-immersed transformer whose temperature rise value is to be determined. Figure 2 An example diagram of a target oil-immersed transformer is provided. For example, the target oil-immersed transformer can be, but is not limited to, the oil-immersed transformer to be tested located on a temperature rise detection platform. The current load rate can refer to the load rate of the target oil-immersed transformer under its current operating state. For example, the current load rate can be, but is not limited to, 55%. The current operating time can refer to the operating time corresponding to the temperature rise value to be determined. For example, the current operating time can be, but is not limited to, the 3rd minute. Specifically, the current load rate (e.g., β1) and the current operating time (e.g., t1) of the target oil-immersed transformer under its current operating state can be obtained.

[0036] S120. Obtain the target fitting function corresponding to the target part in the target oil-immersed transformer.

[0037] The target location can refer to the part of the target oil-immersed transformer where the temperature rise value is to be determined. For example, the target location can be, but is not limited to, a critical part of the target oil-immersed transformer. This critical part can be, but is not limited to, the core, windings, or tank. The target fitting function can be used to characterize the relationship between the temperature rise value corresponding to the target location in the target oil-immersed transformer and the operating time and load rate. The target fitting function is pre-determined based on multiple infrared images of the target location collected at multiple reference load rates. Specifically, the target fitting function corresponding to the target location in the target oil-immersed transformer is obtained. The target fitting function is a fitting function with load rate and operating time as independent variables and temperature rise value as the dependent variable. For example, the target fitting function can be...

[0038] S130. Based on the current load rate, current operating time, and target fitting function, determine the target temperature rise value corresponding to the target part in the target oil-immersed transformer.

[0039] The temperature rise value can refer to the temperature value of a device component above the ambient temperature. The target temperature rise value can refer to the temperature rise value of a target part of the target oil-immersed transformer when it is operating at the current load rate up to the current operating time. Specifically, the current load rate and the current operating time are substituted into the target fitting function corresponding to the target part of the target oil-immersed transformer (e.g., ...). The result of the calculation of the dependent variable (temperature rise value) of the target fitting function can be determined as the target temperature rise value (such as T1) corresponding to the target part in the target oil-immersed transformer.

[0040] The technical solution of this invention obtains the current load rate and current operating time of the target oil-immersed transformer; obtains the target fitting function corresponding to the target part of the target oil-immersed transformer, which characterizes the relationship between the temperature rise value of the target part of the target oil-immersed transformer and the operating time and load rate. The target fitting function is pre-determined based on multiple infrared images of the target part collected under multiple reference load rates; and determines the target temperature rise value corresponding to the target part of the target oil-immersed transformer based on the current load rate, current operating time, and target fitting function. This achieves the determination of the temperature rise value corresponding to the target part of the target oil-immersed transformer at any operating time under multiple load rates based on the pre-fitted target fitting function, and avoids repeated temperature rise detection for different load rates. This allows for rapid determination of the temperature rise value of the oil-immersed transformer operating under any load rate, improving temperature rise detection efficiency.

[0041] Example 2

[0042] Figure 3 This is a flowchart of a method for determining a target fitting function according to Embodiment 2 of the present invention. This embodiment can be applied to determining the target fitting function corresponding to the target part in the target oil-immersed transformer used in the above embodiments. Explanations of terms that are the same as or corresponding to those in the above embodiments will not be repeated here. Figure 3 As shown, the method includes:

[0043] S210. Acquire infrared images of multiple target locations of the target oil-immersed transformer at each reference load rate.

[0044] The reference load rate can refer to a load rate with representative characteristics. For example, the reference load rate can be, but is not limited to, 50%, 60%, 70%, 80%, 90%, and 100%. The infrared image of the target location can refer to an infrared image of the target location within the target oil-immersed transformer. For example, the infrared image of the target location can be an infrared image acquired by a thermal imaging device such as a thermal imager.

[0045] Specifically, infrared images of multiple target locations are acquired at each reference load rate while the target oil-immersed transformer is operating. Generally, a sufficient number of infrared images of the target locations are acquired at each reference load rate.

[0046] S220. Obtain the target operating time of the target oil-immersed transformer when acquiring infrared images of each target location.

[0047] The target operating time can refer to the time when the infrared image of the target part was acquired. Specifically, the target operating time (e.g., t) of the target oil-immersed transformer corresponding to each acquired infrared image of the target part can be determined based on the timestamp in the infrared image of each target part.

[0048] S230. Based on the infrared images of multiple target parts acquired under each reference load rate and the target running time corresponding to each infrared image of the target part, perform data fitting to determine the first fitting function corresponding to each reference load rate.

[0049] The first fitting function is used to characterize the relationship between the temperature rise value of the target part in the target oil-immersed transformer and the operating time. Specifically, based on multiple infrared images of the target part collected at each reference load rate, the temperature rise value (e.g., T) corresponding to the target part in the target oil-immersed transformer in each infrared image of the target part collected at each reference load rate is determined. Table 1 shows the temperature rise values ​​and corresponding target operating times at multiple reference load rates. Table 1 is shown below:

[0050] Table 1. Examples of temperature rise values ​​and corresponding target operating times under multiple reference load rates.

[0051]

[0052]

[0053] Referring to Table 1, data fitting can be performed based on the temperature rise value (e.g., T) of the target location in the target oil-immersed transformer in the infrared image of each target location and the corresponding target operating time (e.g., t) to determine the first fitting function corresponding to each reference load rate. For example, the first fitting function could be T = A(1 - e -Bt Table 2 shows the values ​​of coefficients A and B in the first fitted function for each reference load rate. Table 2 is shown below:

[0054] Table 2 Examples of values ​​for coefficients A and B

[0055] Reference load rate The range of values ​​for A The range of values ​​for B Value of A B takes the value 50％ 22.01-22.16 0.5649-0.5774 22.09 0.5712 60％ 26.65-26.76 0.5652-0.5728 26.71 0.569 70％ 29.31-29.48 0.5427-0.5531 29.39 0.5479 80％ 37.96-38.1 0.5124-0.5188 38.03 0.5156 90％ 44.52-44.71 0.4991-0.5055 44.62 0.5023 100％ 51.08-51.32 0.4890-0.4954 51.2 0.4922

[0056] Referring to Table 2, in the process of data fitting based on the temperature rise value and the corresponding target operating time of the target oil-immersed transformer in the infrared image of each target location, the range of values ​​for coefficient A and coefficient B can be determined first, and the median value of the range of values ​​for coefficient A and coefficient B can be determined respectively. The two determined median values ​​are then used as coefficient A and coefficient B.

[0057] S240. Based on each first fitting function corresponding to each reference load rate, determine the target fitting function corresponding to the target part in the target oil-immersed transformer.

[0058] Specifically, the coefficients A and B in the first fitting function corresponding to each reference load rate are fitted with data based on business requirements to determine the relationship between each reference load rate and the coefficients A and B, thereby determining the target fitting function corresponding to the target part in the target oil-immersed transformer.

[0059] The technical solution of this invention acquires multiple infrared images of target parts of a target oil-immersed transformer at each reference load rate. The target operating time of the target oil-immersed transformer is acquired when each infrared image of a target part is acquired. Based on the multiple infrared images of target parts acquired at each reference load rate and the corresponding target operating time, data fitting is performed to determine a first fitting function for each reference load rate. This first fitting function characterizes the relationship between the temperature rise value of the target part in the target oil-immersed transformer and the operating time. Based on each first fitting function corresponding to each reference load rate, a target fitting function is determined for the target part in the target oil-immersed transformer. This allows for the determination of the temperature rise value of the target part in the target oil-immersed transformer at any operating time under multiple load rates based on the pre-fitted target fitting function. This avoids repeatedly performing temperature rise detection for different load rates, thus enabling rapid determination of the temperature rise value of the oil-immersed transformer operating at any load rate and improving temperature rise detection efficiency.

[0060] In the technical aspect of the above solution, S230 may include: for each reference load rate, based on the infrared images of multiple target parts acquired under the reference load rate and the relationship between the infrared pixel values ​​and the temperature rise value, determining the target temperature rise value corresponding to each target part infrared image; and performing data fitting based on each target temperature rise value under the reference load rate and the target running time corresponding to each target temperature rise value to determine the first fitting function corresponding to the reference load rate.

[0061] Here, infrared pixel value can refer to the pixel value corresponding to each pixel in the infrared image. Pixel value can be, but is not limited to, the RGB value corresponding to a pixel in the image. Specifically, based on the infrared images of each target part acquired under this reference load rate, the pixel value corresponding to the target part in the infrared image of each target part is determined. Based on the changes in each pixel value and the infrared pixel value with the temperature rise value, the target temperature rise value corresponding to the infrared image of each target part is determined. Based on the determined target temperature rise values ​​under this reference load rate and the target running time corresponding to each target temperature rise value, data fitting is performed to determine the first fitting function corresponding to this reference load rate.

[0062] In the technical aspect of the above solution, "for each reference load rate, based on the infrared images of multiple target parts acquired under that reference load rate and the relationship between the infrared pixel values ​​and the temperature rise value, determine the target temperature rise value corresponding to each target infrared image" can include: for each reference load rate, based on the infrared pixel values ​​of each target part in each target infrared image acquired under that reference load rate and the relationship between the infrared pixel values ​​and the temperature rise value, determine the temperature rise value of each target pixel in each target infrared image; and determine the highest target pixel temperature rise value in each target infrared image as the target temperature rise value corresponding to the infrared image of that target part under that reference load rate.

[0063] The infrared pixel value of the target area can refer to the pixel value of each pixel in the infrared image of the target area. The target pixel temperature rise value can refer to the temperature rise value of each pixel in the infrared image of the target area. Figure 4 An example image of an infrared image of a target location is provided. Specifically, for each reference load rate, based on the infrared pixel values ​​of each target location in the infrared images of each target location acquired under that reference load rate, and the relationship between the infrared pixel values ​​and the temperature rise value, the temperature rise value of each target pixel in each target infrared image is determined. For oil-immersed transformers, the highest temperature rise value and the rated temperature rise value of the target location can be used to determine whether the oil-immersed transformer is in an over-temperature warning state. The highest target pixel temperature rise value in each target infrared image is determined as the target temperature rise value corresponding to that target location infrared image under that reference load rate. See also... Figure 4 , Figure 4 The area within the white box represents the target region, and the location of the crosshair indicates the location of the highest target pixel temperature rise value. Figure 4 The highest temperature rise value of the target pixel was 89.4℃.

[0064] Example 3

[0065] Figure 5 This is a flowchart of a method for determining a target fitting function according to Embodiment 3 of the present invention. Based on the above embodiments, this embodiment describes in detail the process of determining the target fitting function corresponding to the target part in the target oil-immersed transformer based on each first fitting function corresponding to each reference load rate. Explanations of terms that are the same as or corresponding to those in the above embodiments will not be repeated here. Figure 5 As shown, the method includes:

[0066] S310. Acquire infrared images of multiple target locations of the target oil-immersed transformer at each reference load rate.

[0067] S320: Obtain the target operating time of the target oil-immersed transformer when acquiring infrared images of each target location.

[0068] S330. Based on the infrared images of multiple target locations collected under each reference load rate and the target operating time corresponding to each target location infrared image, data fitting is performed to determine the first fitting function corresponding to each reference load rate. The first fitting function is used to characterize the relationship between the temperature rise value corresponding to the target location in the target oil-immersed transformer and the operating time.

[0069] S340. Obtain the target base product coefficient and target base power coefficient in the first fitting function corresponding to each reference load rate.

[0070] The first fitting function is an exponential function with the running time as the independent variable and the temperature rise as the dependent variable. For example, the first fitting function could be T = A(1 - e^(-t / t)). -Bt The target base product coefficient can be coefficient A, and the target base power coefficient can be coefficient B. Specifically, based on the first fitting function corresponding to each reference load rate, the target base product coefficient and the target base power coefficient corresponding to each reference load rate can be determined.

[0071] S350. Based on each reference load rate and the corresponding product coefficient of each base, perform data fitting to determine the second fitting function corresponding to the target part in the target oil-immersed transformer.

[0072] in, Figure 6 An example graph of the fitting curve corresponding to the second fitting function is given. The second fitting function is an exponential function with the load rate as the independent variable and the base-product coefficient as the dependent variable. Specifically, data fitting is performed based on each reference load rate and the corresponding base-product coefficient to determine the transformation relationship between each reference load rate and the corresponding base-product coefficient. The function corresponding to this transformation relationship is then determined as the second fitting function for the target part in the target oil-immersed transformer. For example, the second fitting function could be...

[0073] S360. Based on each reference load rate and the corresponding base power coefficients, data fitting is performed to determine the third fitting function corresponding to the target part in the target oil-immersed transformer.

[0074] in, Figure 7 An example curve of the fitting function corresponding to the third fitting function is given. The third fitting function is a cubic function with the load rate as the independent variable and the base power coefficient as the dependent variable. Specifically, data fitting is performed based on each reference load rate and its corresponding base power coefficient to determine the transformation relationship between each reference load rate and its corresponding base power coefficient. The function corresponding to this transformation relationship is then determined as the third fitting function for the target part in the target oil-immersed transformer. For example, the third fitting function could be B = -0.05545 + 2.89113β - 4.2044β2 +1.86204β 3 .

[0075] S370. Based on the first fitting function, the second fitting function, and the third fitting function, determine the target fitting function corresponding to the target part in the target oil-immersed transformer.

[0076] Specifically, based on the first fitting function (such as T = A(1-e) -Bt )), second fitting function (such as And the third fitting function (e.g., B = -0.05545 + 2.89113β - 4.2044β) 2 +1.86204β 3 This involves determining the target fitting function for the target part of the target oil-immersed transformer. For example, the target fitting function could be...

[0077]

[0078] The technical solution of this invention obtains the target base product coefficient and target base power coefficient in the first fitting function corresponding to each reference load rate. Based on each reference load rate and the corresponding base product coefficient, data fitting is performed to determine the second fitting function corresponding to the target part in the target oil-immersed transformer. Based on each reference load rate and the corresponding base power coefficient, data fitting is performed to determine the third fitting function corresponding to the target part in the target oil-immersed transformer. Based on the first, second, and third fitting functions, the target fitting function corresponding to the target part in the target oil-immersed transformer can be quickly determined. This allows for the determination of the temperature rise value corresponding to the target part in the target oil-immersed transformer at any operating time under multiple load rates based on the pre-fitted target fitting function, avoiding repeated temperature rise detection for different load rates. This enables rapid determination of the temperature rise value of the oil-immersed transformer operating at any load rate, improving temperature rise detection efficiency.

[0079] In terms of the technical solution described above, S370 may include:

[0080] Determine the base product expression corresponding to the base product coefficient in the second fitting function, and the base power expression corresponding to the base power coefficient in the third fitting function;

[0081] Update the base product coefficients and base power coefficients in the same first fitting function to base product expressions and base power expressions, respectively;

[0082] The updated first fitting function is determined as the target fitting function corresponding to the target part in the target oil-immersed transformer.

[0083] The target fitting function can be an exponential function with load rate and operating time as independent variables and temperature rise as the dependent variable. Specifically, the base-product expression corresponding to the base-product coefficients in the second fitting function and the base-power expression corresponding to the base-power coefficients in the third fitting function are determined. For example, the base-product expression could be... In For example, the expression for the base exponentiation can be B = -0.05545 + 2.89113β - 4.2044β 2 +1.86204β 3 -0.05545 + 2.89113β - 4.2044β 2 +1.86204β 3 The base product coefficients and base power coefficients in the same first fitting function are updated to base product expressions and base power expressions, respectively. This updated first fitting function is then determined as the target fitting function corresponding to the target part in the target oil-immersed transformer. For example, this first fitting function could be...

[0084]

[0085] The following are embodiments of the temperature rise determination device provided in this invention. This device and the temperature rise determination method of the above embodiments belong to the same inventive concept. For details not described in detail in the embodiments of the temperature rise determination device, please refer to the embodiments of the above temperature rise determination method.

[0086] Example 4

[0087] Figure 8 This is a schematic diagram of a temperature rise determination device provided in Embodiment 4 of the present invention. Figure 8 As shown, the device includes: a current load rate acquisition module 410, a target fitting function acquisition module 420, and a target temperature rise determination module 430.

[0088] The current load rate acquisition module 410 is used to acquire the current load rate and current operating time of the target oil-immersed transformer; the target fitting function acquisition module 420 is used to acquire the target fitting function corresponding to the target part in the target oil-immersed transformer. The target fitting function is used to characterize the relationship between the temperature rise value corresponding to the target part in the target oil-immersed transformer and the operating time and load rate. The target fitting function is determined in advance based on multiple infrared images of the target parts collected under multiple reference load rates; the target temperature rise value determination module 430 is used to determine the target temperature rise value corresponding to the target part in the target oil-immersed transformer based on the current load rate, the current operating time and the target fitting function.

[0089] The technical solution of this invention obtains the current load rate and current operating time of the target oil-immersed transformer; obtains the target fitting function corresponding to the target part of the target oil-immersed transformer, which characterizes the relationship between the temperature rise value of the target part of the target oil-immersed transformer and the operating time and load rate. The target fitting function is pre-determined based on multiple infrared images of the target part collected under multiple reference load rates; and determines the target temperature rise value corresponding to the target part of the target oil-immersed transformer based on the current load rate, current operating time, and target fitting function. This achieves the determination of the temperature rise value corresponding to the target part of the target oil-immersed transformer at any operating time under multiple load rates based on the pre-fitted target fitting function, and avoids repeated temperature rise detection for different load rates. This allows for rapid determination of the temperature rise value of the oil-immersed transformer operating under any load rate, improving temperature rise detection efficiency.

[0090] Optionally, the device further includes:

[0091] The target location infrared image acquisition module is used to acquire multiple target location infrared images collected at each reference load rate when the target oil-immersed transformer is operating.

[0092] The target operating time acquisition module is used to acquire the target operating time of the target oil-immersed transformer when infrared images of each target part are collected.

[0093] The first fitting function determination module is used to perform data fitting based on multiple infrared images of target parts collected under each reference load rate and the target operating time corresponding to each infrared image of target parts, and to determine the first fitting function corresponding to each reference load rate. The first fitting function is used to characterize the relationship between the temperature rise value corresponding to the target part in the target oil-immersed transformer and the operating time.

[0094] The target fitting function determination module is used to determine the target fitting function corresponding to the target part in the target oil-immersed transformer based on the first fitting function corresponding to each reference load rate.

[0095] Optionally, the first fitting function determination module may include:

[0096] The target temperature rise determination unit is used to determine the target temperature rise value corresponding to each target part infrared image for each reference load rate, based on the infrared images of multiple target parts collected under the reference load rate and the relationship between the infrared pixel values ​​and the temperature rise value.

[0097] The first fitting function determination unit is used to perform data fitting based on each target temperature rise value under the reference load rate and the target running time corresponding to each target temperature rise value, and to determine the first fitting function corresponding to the reference load rate.

[0098] Optionally, the target temperature rise determination unit is specifically used to: for each reference load rate, based on the infrared pixel value of each target part in the infrared image of each target part acquired under the reference load rate and the relationship between the infrared pixel value and the temperature rise value, determine the temperature rise value of each target pixel in each target infrared image; and determine the highest target pixel temperature rise value in each target infrared image as the target temperature rise value corresponding to the infrared image of the target part under the reference load rate.

[0099] Optionally, the first fitting function is an exponential function with the running time as the independent variable and the temperature rise as the dependent variable;

[0100] The target fitting function determination module may include:

[0101] The coefficient acquisition unit is used to acquire the target base product coefficient and the target base power coefficient in the first fitting function corresponding to each reference load rate;

[0102] The second fitting function determination unit is used to perform data fitting based on each reference load rate and the corresponding product coefficients of each base, and to determine the second fitting function corresponding to the target part in the target oil-immersed transformer.

[0103] The third fitting function determination unit is used to perform data fitting based on each reference load rate and the corresponding base power coefficients to determine the third fitting function corresponding to the target part in the target oil-immersed transformer.

[0104] The target fitting function determination unit is used to determine the target fitting function corresponding to the target part in the target oil-immersed transformer based on the first fitting function, the second fitting function, and the third fitting function.

[0105] Optionally, the second fitting function is an exponential function with the load rate as the independent variable and the coefficient of the product of the bases as the dependent variable; the third fitting function is a cubic function with the load rate as the independent variable and the coefficient of the power of the bases as the dependent variable.

[0106] Optionally, the target fitting function determination unit is specifically used to: determine the base product expression corresponding to the base product coefficient in the second fitting function, and the base power expression corresponding to the base power coefficient in the third fitting function; update the base product coefficient and base power coefficient in the same first fitting function to the base product expression and base power expression respectively; and determine the updated first fitting function as the target fitting function corresponding to the target part in the target oil-immersed transformer.

[0107] The temperature rise determination device provided in the embodiments of the present invention can execute the temperature rise determination method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the temperature rise determination method.

[0108] It is worth noting that in the embodiments of the temperature rise determination device described above, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of each functional unit are only for easy differentiation and are not used to limit the scope of protection of the present invention.

[0109] Example 5

[0110] Figure 9 A schematic diagram of an electronic device 10 that can be used to implement embodiments of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0111] like Figure 9 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 may also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0112] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0113] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the temperature rise determination method.

[0114] In some embodiments, the temperature rise determination method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the temperature rise determination method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the temperature rise determination method by any other suitable means (e.g., by means of firmware).

[0115] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0116] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0117] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0118] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0119] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0120] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0121] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0122] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A temperature rise value determination method, characterized by, include: Obtain the current load rate and current operating time of the target oil-immersed transformer; Obtain the target fitting function corresponding to the target part in the target oil-immersed transformer. The target fitting function is used to characterize the relationship between the temperature rise value corresponding to the target part in the target oil-immersed transformer and the operating time and load rate. The target fitting function is determined in advance based on multiple infrared images of the target part collected when the target oil-immersed transformer is operating at multiple reference load rates. Based on the current load rate, the current operating time, and the target fitting function, determine the target temperature rise value corresponding to the target part in the target oil-immersed transformer; The process of determining the target fitting function includes: determining the target fitting function corresponding to the target part in the target oil-immersed transformer based on multiple infrared images of the target parts collected under multiple reference load rates. The step of determining the target fitting function corresponding to the target part of the target oil-immersed transformer based on multiple infrared images of the target parts collected under multiple reference load rates includes: acquiring multiple infrared images of the target parts collected under each reference load rate; acquiring the target operating time of the target oil-immersed transformer when acquiring each infrared image of the target parts; performing data fitting based on the multiple infrared images of the target parts collected under each reference load rate and the target operating time corresponding to each infrared image of the target parts to determine a first fitting function corresponding to each reference load rate, wherein the first fitting function is used to characterize the relationship between the temperature rise value corresponding to the target part of the target oil-immersed transformer and the operating time; and determining the target fitting function corresponding to the target part of the target oil-immersed transformer based on each first fitting function corresponding to each reference load rate.

2. The method of claim 1, wherein, The process of fitting data based on multiple infrared images of target locations acquired at each reference load rate and the target running time corresponding to each infrared image of a target location to determine the first fitting function corresponding to each reference load rate includes: For each reference load rate, based on the infrared images of multiple target parts acquired under that reference load rate and the relationship between the infrared pixel values ​​and the temperature rise value, the target temperature rise value corresponding to each infrared image of the target part is determined; Based on the target temperature rise values ​​under the reference load rate and the target operating time corresponding to each target temperature rise value, data fitting is performed to determine the first fitting function corresponding to the reference load rate.

3. The method of claim 2, wherein, For each reference load rate, based on multiple infrared images of target locations acquired at that reference load rate and the relationship between infrared pixel values ​​and temperature rise values, the target temperature rise value corresponding to each infrared image of the target location is determined, including: For each reference load rate, based on the infrared pixel values ​​of each target part in the infrared image of each target part acquired under that reference load rate and the relationship between the infrared pixel values ​​and the temperature rise value, the temperature rise value of each target pixel in each target infrared image is determined; Determine the highest target pixel temperature rise value in each target infrared image as the target temperature rise value corresponding to the target infrared image of the target site under the reference load rate.

4. The method of claim 1, wherein, The first fitting function is an exponential function with the running time as the independent variable and the temperature rise value as the dependent variable. The target fitting function corresponding to the target site in the target oil-immersed transformer is determined based on the first fitting function corresponding to each reference load rate, including: Obtain the target base product coefficient and the target base power coefficient in the first fitting function corresponding to each reference load rate; Based on each reference load rate and the corresponding base product coefficient, data fitting is performed to determine the second fitting function corresponding to the target site in the target oil-immersed transformer; Based on each reference load rate and the corresponding base power coefficient, data fitting is performed to determine the third fitting function corresponding to the target site in the target oil-immersed transformer; Based on the first fitting function, the second fitting function and the third fitting function, the target fitting function corresponding to the target site in the target oil-immersed transformer is determined.

5. The method of claim 4, wherein, The second fitting function is an exponential function with the load rate as the independent variable and the base product coefficient as the dependent variable. The third fitting function is a cubic function with the load rate as the independent variable and the base power coefficient as the dependent variable.

6. The method of claim 4, wherein, The target fitting function corresponding to the target site in the target oil-immersed transformer is determined based on the first fitting function, the second fitting function and the third fitting function, including: Determine the base product expression corresponding to the base product coefficient in the second fitting function, and the base power expression corresponding to the base power coefficient in the third fitting function; Update the base product coefficient and the base power coefficient in the same first fitting function to the base product expression and the base power expression, respectively; The updated first fitting function is determined as the target fitting function corresponding to the target site in the target oil-immersed transformer.

7. A device for determining temperature rise, characterized in that, Including: The current load rate acquisition module is used to acquire the current load rate and the current running time of the target oil-immersed transformer currently running; The target fitting function acquisition module is used to acquire the target fitting function corresponding to the target site in the target oil-immersed transformer, which is used to represent the change relationship between the temperature rise value corresponding to the target site in the target oil-immersed transformer and the running time and the load rate, and the target fitting function is determined in advance based on multiple target site infrared images collected when the target oil-immersed transformer runs under multiple reference load rates; The target temperature rise value determination module is used to determine the target temperature rise value corresponding to the target site in the target oil-immersed transformer based on the current load rate, the current running time and the target fitting function; The device further includes: The target site infrared image acquisition module is used to acquire multiple target site infrared images collected when the target oil-immersed transformer runs under each reference load rate; The target running time acquisition module is used to acquire the target running time of the target oil-immersed transformer when each target site infrared image is collected. The first fitting function determination module is configured to perform data fitting based on the plurality of target site infrared images acquired under each reference load rate and the target operation time corresponding to each target site infrared image, to determine a first fitting function corresponding to each reference load rate, and the first fitting function is used to represent a change relationship between a temperature rise value of the target site in the target oil-immersed transformer and the operation time. The target fitting function determination module is configured to determine a target fitting function corresponding to the target site in the target oil-immersed transformer based on the first fitting functions corresponding to the reference load rates.

8. An electronic device, comprising: The electronic device comprises: at least one processor; and a memory connected to the at least one processor in communication; wherein The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the temperature rise value determination method in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions, and the computer instructions are used to enable the processor to implement the temperature rise value determination method in any one of claims 1-6 when executed.

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