Method and device for acquiring comprehensive health index of transformer

Abstract

The invention provides a transformer comprehensive health index obtaining method and device, and relates to the technical field of equipment health condition evaluation. The method comprises the following steps: calculating an initial health index of the transformer according to an initial state quantity score value and a dynamic weight corresponding to each state quantity of the transformer; calculating a basic health index of the transformer according to the component degradation index of the transformer, the online chromatographic degradation index and the initial health index; and correcting the basic health index of the transformer according to a hidden danger correction coefficient and an environment correction coefficient predetermined by historical working condition data in a preset period to obtain a comprehensive health index of the transformer. The device executes the method. According to the transformer comprehensive health index acquisition method and device provided by the embodiment of the invention, the accuracy, timeliness and objectivity of transformer health assessment can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment health status assessment, and in particular to a method and device for obtaining a comprehensive health index of a transformer. Background Art

[0002] The transformer is a very important primary equipment in the current substation. It is responsible for converting and transmitting a large amount of electric energy. Once a transformer fails, it will seriously affect the power supply capacity of the power grid and even cause a large-scale power outage. Therefore, accurate health assessment of the transformer is an effective measure to ensure the safety and stability of the equipment.

[0003] The commonly used transformer health assessment methods currently have the following main problems: First, the existing health status evaluation theory lacks consideration of the initial health status; second, the lack of consideration of real-time data and historical data leads to delayed and inaccurate equipment status evaluation results; third, the evaluation guidelines mostly rely on expert experience, with a large proportion of subjective factors, and cannot fully reflect the equipment status. Summary of the invention

[0004] In view of the problems in the prior art, an embodiment of the present invention provides a method and device for obtaining a comprehensive health index of a transformer, which can at least partially solve the problems in the prior art.

[0005] On the one hand, the present invention provides a method for obtaining a comprehensive health index of a transformer, comprising:

[0006] The initial health index of the transformer is calculated based on the initial state quantity score values ​​and dynamic weights corresponding to each state quantity of the transformer;

[0007] Calculating a transformer basic health index according to the transformer component degradation index, the online chromatogram degradation index and the initial health index;

[0008] The transformer basic health index is corrected according to the hidden danger correction coefficient and the environmental correction coefficient predetermined by the historical operating condition data within a preset period to obtain the transformer comprehensive health index.

[0009] The transformer basic health index is calculated based on the transformer component degradation index, the online chromatogram degradation index and the initial health index, including:

[0010] The transformer basic health index is calculated according to the following expression:

[0011]

[0012] Among them, HI com is the transformer basic health index, is the initial health index, is the component degradation index, χ DGA is the online chromatographic degradation index,

[0013] Wherein, determining the hidden danger correction coefficient includes:

[0014] Determine the number of occurrences of hidden dangers corresponding to each hidden danger level in the preset period according to the historical operating condition data;

[0015] According to the hidden danger level adjustment factors corresponding to the occurrence times of each hidden danger, the occurrence times of each hidden danger are adjusted to obtain the hidden danger risk score;

[0016] The hidden danger correction coefficient is calculated according to the first preset piecewise function and the numerical interval of the hidden danger risk score;

[0017] Among them, the first preset piecewise function takes the hidden danger risk score as the independent variable, and the piecewise function parameter value is obtained by fitting the historical operating condition data.

[0018] Among them, the adjustment factors of each hidden danger level increase in sequence according to the hidden danger risk degree of each hidden danger level.

[0019] Wherein, determining the environmental correction coefficient includes:

[0020] Determine the transformer ambient temperature value in the preset period according to the historical operating condition data;

[0021] The environmental correction coefficient is calculated according to the second preset piecewise function and the numerical interval of the transformer ambient temperature value;

[0022] The second preset piecewise function takes the transformer ambient temperature value as an independent variable, and the piecewise function parameter value is obtained by fitting the historical operating condition data.

[0023] Wherein, obtaining the component degradation index includes:

[0024] Determine the status information corresponding to each transformer component of the transformer, and determine the deduction value of each transformer component under the corresponding status information;

[0025] The component degradation index is calculated based on the deduction value of each transformer component under the corresponding state information and the weight of the corresponding transformer component.

[0026] Wherein, obtaining the online chromatographic degradation index includes:

[0027] The chromatographic status data of the transformer are obtained, and the online chromatographic degradation index is calculated according to the chromatographic status data and the weight of the corresponding chromatographic status data.

[0028] On the one hand, the present invention provides a device for obtaining a comprehensive health index of a transformer, comprising:

[0029] A first calculation unit, configured to calculate an initial health index of the transformer according to initial state quantity scores and dynamic weights respectively corresponding to various state quantities of the transformer;

[0030] A second calculation unit is used to calculate a basic health index of the transformer according to the component degradation index, the online chromatogram degradation index and the initial health index of the transformer;

[0031] The acquisition unit is used to correct the basic health index of the transformer according to the hidden danger correction coefficient and the environmental correction coefficient predetermined by the historical operating condition data within a preset period to obtain the comprehensive health index of the transformer.

[0032] In another aspect, an embodiment of the present invention provides an electronic device, including: a processor, a memory, and a bus, wherein:

[0033] The processor and the memory communicate with each other via the bus;

[0034] The memory stores program instructions that can be executed by the processor, and the processor calls the program instructions to execute the following method:

[0035] The initial health index of the transformer is calculated based on the initial state quantity score values ​​and dynamic weights corresponding to each state quantity of the transformer;

[0036] Calculating a transformer basic health index according to the transformer component degradation index, the online chromatogram degradation index and the initial health index;

[0037] The transformer basic health index is corrected according to the hidden danger correction coefficient and the environmental correction coefficient predetermined by the historical operating condition data within a preset period to obtain the transformer comprehensive health index.

[0038] An embodiment of the present invention provides a non-transitory computer-readable storage medium, including:

[0039] The non-transitory computer-readable storage medium stores computer instructions, which cause the computer to execute the following method:

[0040] The initial health index of the transformer is calculated based on the initial state quantity score values ​​and dynamic weights corresponding to each state quantity of the transformer;

[0041] Calculating a transformer basic health index according to the transformer component degradation index, the online chromatogram degradation index and the initial health index;

[0042] The transformer basic health index is corrected according to the hidden danger correction coefficient and the environmental correction coefficient predetermined by the historical operating condition data within a preset period to obtain the transformer comprehensive health index.

[0043] The method and device for obtaining the comprehensive health index of a transformer provided in an embodiment of the present invention calculate the initial health index of the transformer according to the initial state quantity scores and dynamic weights respectively corresponding to each state quantity of the transformer; calculate the basic health index of the transformer according to the component degradation index, the online chromatographic degradation index and the initial health index of the transformer; correct the basic health index of the transformer according to the hidden danger correction coefficient and the environmental correction coefficient predetermined by the historical operating condition data within a preset period to obtain the comprehensive health index of the transformer, which can improve the accuracy, timeliness and objectivity of the transformer health assessment. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0045] Figure 1 It is a flow chart of a method for obtaining a comprehensive health index of a transformer provided in one embodiment of the present invention.

[0046] Figure 2 It is a structural schematic diagram of a device for obtaining a comprehensive health index of a transformer provided in one embodiment of the present invention.

[0047] Figure 3 A schematic diagram of the physical structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention. It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily.

[0049] Figure 1 FIG. 1 is a flow chart of a method for obtaining a comprehensive health index of a transformer provided by an embodiment of the present invention. Figure 1 As shown, the method for obtaining the comprehensive health index of a transformer provided by an embodiment of the present invention includes:

[0050] Step S1: Calculate the initial health index of the transformer according to the initial state quantity score values ​​and dynamic weights corresponding to each state quantity of the transformer.

[0051] Step S2: Calculate the basic health index of the transformer according to the component degradation index, the online chromatographic degradation index and the initial health index of the transformer.

[0052] Step S3: Correct the basic health index of the transformer according to the hidden danger correction coefficient and the environmental correction coefficient predetermined by the historical operating condition data within a preset period to obtain a comprehensive health index of the transformer.

[0053] In the above step S1, the device calculates the initial health index of the transformer according to the initial state quantity score values ​​and dynamic weights corresponding to each state quantity of the transformer. The device can be a computer device that executes the method. The initial state quantity score value can be determined according to the transformer manufacturer evaluation, technical compliance assessment and short-circuit resistance verification. For dry-type transformers, the state quantity may include current, voltage and winding temperature. If the full score is 100 points, the initial state quantity score value is less than 100 points.

[0054] The initial health index can be calculated according to the following formula

[0055]

[0056] Among them, F i represents the initial state quantity score value of the i-th state quantity; p i Represents the dynamic weight of the i-th state quantity.

[0057] The dynamic weight can be calculated according to the following formula:

[0058]

[0059] Where n represents the total number of types of state quantities. In the degradation variable weight method scoring formula, the weight of the state quantity is a static weight, which is used to characterize the relative importance of the evaluation factor itself. However, when the key performance of the transformer degrades or some defects occur, it is usually only manifested in part of the state quantity. At this time, if static weights are used for calculation, abnormal data may be submerged in a large amount of normal data, resulting in the evaluation results being unable to reflect the true health status of the equipment. Since dynamic weights can reflect the impact of factor state changes on the evaluation results, the score-based exponential degradation variable weight method is used to dynamically adjust the state quantity weights in the network access quality.

[0060] In the above step S2, the device calculates the basic health index of the transformer according to the component degradation index, the online chromatographic degradation index and the initial health index of the transformer.

[0061] Obtaining the component degradation index, including:

[0062] Determine the status information corresponding to each transformer component of the transformer, and determine the deduction value of each transformer component under the corresponding status information;

[0063] According to the deduction value of each transformer component under the corresponding status information and the weight of the corresponding transformer component, the component degradation index is calculated. Each transformer component and its corresponding status information are shown in Table 1:

[0064] Table 1

[0065]

[0066]

[0067] The deduction value of each transformer component under the corresponding state information can also be further determined according to the corresponding relationship shown in Table 1.

[0068] The weight w of the corresponding transformer component j It can be calculated according to the following formula:

[0069]

[0070] Among them, v j Represents the deduction value of the j-th transformer component.

[0071] The component degradation index χ can be calculated according to the following formula: HI1 :

[0072]

[0073] Among them, s j Indicates the deduction value of each component under the corresponding status information.

[0074] Obtaining the online chromatographic degradation index includes:

[0075] The chromatographic status data of the transformer are obtained, and the online chromatographic degradation index is calculated according to the chromatographic status data and the weight of the corresponding chromatographic status data.

[0076] The online chromatographic degradation index χ can be calculated according to the following formula: DGA :

[0077]

[0078] Among them, c k represents the kth chromatographic state data, λ k Indicates the weight corresponding to the kth chromatographic state data.

[0079] The step of calculating the transformer basic health index according to the transformer component degradation index, the online chromatogram degradation index and the initial health index includes:

[0080] The transformer basic health index is calculated according to the following expression:

[0081]

[0082] Among them, HI com is the transformer basic health index, is the initial health index, is the component degradation index, χ DGA is the online chromatographic degradation index,

[0083] In the above step S3, the device corrects the basic health index of the transformer according to the hidden danger correction coefficient and the environmental correction coefficient predetermined by the historical operating condition data within a preset period to obtain the comprehensive health index of the transformer. Determining the hidden danger correction coefficient includes:

[0084] Determine the number of occurrences of hidden dangers corresponding to each hidden danger level in the preset period according to the historical operating condition data;

[0085] According to the hidden danger level adjustment factors corresponding to the occurrence times of each hidden danger, the occurrence times of each hidden danger are adjusted to obtain the hidden danger risk score;

[0086] The hidden danger correction coefficient is calculated according to the first preset piecewise function and the numerical interval of the hidden danger risk score;

[0087] Among them, the first preset piecewise function takes the hidden danger risk score as the independent variable, and the piecewise function parameter value is obtained by fitting the historical operating condition data.

[0088] The adjustment factors for each hazard level increase in sequence according to the degree of hazard risk of each hazard level.

[0089] The preset period can be set according to the actual situation and can be selected as one year. The hidden danger levels are in the order of increasing risk level, namely general hidden dangers, major hidden dangers and safety incident hidden dangers. The number of hidden dangers corresponding to general hidden dangers is recorded as t g , the number of hidden dangers corresponding to major hidden dangers is recorded as t w , the number of hidden dangers corresponding to the hidden dangers of safety incidents is recorded as t wtThe corresponding hidden danger level adjustment factors are a1, a2 and a3. The values ​​corresponding to a1, a2 and a3 increase in sequence and can be set to 2, 8 and 10 according to actual conditions.

[0090] The hidden danger risk score z can be calculated according to the following formula:

[0091] z=a1×t g +a2×t w +a3×t wt

[0092] The hidden danger correction coefficient π1 can be calculated according to the following first preset piecewise function:

[0093]

[0094] Among them, b1 and b2 can be set independently according to actual conditions. Referring to the above case where a1, a2 and a3 are 2, 8 and 10, the corresponding b1 and b2 can be selected as 7 and 22.

[0095] It can be seen from the above formula that the first preset piecewise function takes z as the independent variable, and the piecewise function parameter value is obtained by fitting the historical operating condition data.

[0096] Determining the environmental correction factor includes:

[0097] Determine the transformer ambient temperature value in the preset period according to the historical operating condition data;

[0098] The environmental correction coefficient is calculated according to the second preset piecewise function and the numerical interval of the transformer ambient temperature value;

[0099] The second preset piecewise function takes the transformer ambient temperature value as an independent variable, and the piecewise function parameter value is obtained by fitting the historical operating condition data.

[0100] The environmental correction coefficient π2 can be calculated according to the following second preset piecewise function:

[0101]

[0102] Wherein, T is the transformer ambient temperature value, in ° C. As can be seen from the above formula, the second preset piecewise function takes T as the independent variable, and the piecewise function parameter value is obtained by fitting the historical operating condition data.

[0103] The transformer basic health index is corrected according to the hidden danger correction coefficient and the environmental correction coefficient predetermined according to the historical operating condition data within the preset period to obtain the transformer comprehensive health index, including:

[0104] The transformer comprehensive health index TH is obtained according to the following formula:

[0105] TH=HI com ×π1×π2

[0106] The transformer comprehensive health index acquisition method provided by the embodiment of the present invention has the following beneficial technical effects:

[0107] (1) Strong adaptability. This method is highly compatible and can be reused on a variety of equipment types. It integrates traditional guideline-based transformer status evaluation, online data status evaluation, historical operating conditions, and external environmental factors to determine the health status of the transformer.

[0108] (2) Comprehensiveness. The algorithm not only considers the impact of test data, historical operating data, external environment data and online monitoring data on transformer equipment.

[0109] (3) Practicality. Based on the guidelines, the algorithm integrates the equipment operation status evaluation to improve the real-time performance and accuracy of the algorithm.

[0110] The method for obtaining the comprehensive health index of a transformer provided in an embodiment of the present invention calculates the initial health index of the transformer according to the initial state quantity score values ​​and dynamic weights respectively corresponding to each state quantity of the transformer; calculates the basic health index of the transformer according to the component degradation index, the online chromatographic degradation index and the initial health index of the transformer; and corrects the basic health index of the transformer according to the hidden danger correction coefficient and the environmental correction coefficient predetermined by the historical operating condition data within a preset period to obtain the comprehensive health index of the transformer, which can improve the accuracy, timeliness and objectivity of the transformer health assessment.

[0111] Furthermore, the transformer basic health index is calculated based on the transformer component degradation index, the online chromatogram degradation index and the initial health index, including:

[0112] The transformer basic health index is calculated according to the following expression:

[0113]

[0114] Among them, HI com is the transformer basic health index, is the initial health index, is the component degradation index, χ DGA is the online chromatographic degradation index, Please refer to the above embodiments for description and no further details will be given.

[0115] Furthermore, determining the hidden danger correction coefficient includes:

[0116] The number of times hidden dangers corresponding to each hidden danger level occur in the preset period is determined according to the historical operating condition data; the description can be made with reference to the above embodiment and will not be repeated here.

[0117] According to the hidden danger level adjustment factors corresponding to the occurrence times of each hidden danger, the occurrence times of each hidden danger are adjusted to obtain the hidden danger risk score; the description can be made with reference to the above embodiment and will not be repeated here.

[0118] The hidden danger correction coefficient is calculated according to the first preset piecewise function and the numerical interval of the hidden danger risk score; the description may refer to the above embodiment and will not be repeated here.

[0119] The first preset piecewise function takes the hidden danger risk score as an independent variable, and the piecewise function parameter value is obtained by fitting the historical working condition data. The above-mentioned embodiment can be referred to for explanation, and no further description is given.

[0120] Furthermore, each hidden danger level adjustment factor increases in sequence according to the hidden danger risk degree of each hidden danger level. Please refer to the above embodiment for explanation, and no further details will be given.

[0121] Further, determining the environmental correction coefficient includes:

[0122] The transformer ambient temperature value in the preset period is determined according to the historical operating condition data; the description may refer to the above embodiment and will not be repeated here.

[0123] The environmental correction coefficient is calculated based on the second preset piecewise function and the numerical interval of the transformer ambient temperature value; the above-mentioned embodiment can be referred to for description and will not be repeated here.

[0124] The second preset piecewise function takes the transformer ambient temperature value as an independent variable, and the piecewise function parameter value is obtained by fitting the historical operating condition data. The above-mentioned embodiment can be referred to for explanation, and no further description is given.

[0125] Further, obtaining the component degradation index includes:

[0126] Determine the status information corresponding to each transformer component of the transformer, and determine the deduction value of each transformer component under the corresponding status information; refer to the above embodiment for description and no further details will be given.

[0127] The component degradation index is calculated based on the deduction value of each transformer component under the corresponding state information and the weight of the corresponding transformer component. The above description can be referred to in the above embodiment and will not be repeated here.

[0128] Further, obtaining the online chromatographic degradation index includes:

[0129] The chromatographic status data of the transformer are obtained, and the online chromatographic degradation index is calculated according to the chromatographic status data and the weight of the corresponding chromatographic status data. The above-mentioned embodiment can be referred to for explanation, and no further description is given.

[0130] Figure 2 : is a schematic diagram of the structure of a device for obtaining a comprehensive health index of a transformer provided by an embodiment of the present invention. Figure 2 As shown, the transformer comprehensive health index acquisition device provided by the embodiment of the present invention includes a first calculation unit 201, a second calculation unit 202 and an acquisition unit 203, wherein:

[0131] The first calculation unit 201 is used to calculate the initial health index of the transformer according to the initial state quantity score values ​​and dynamic weights corresponding to each state quantity of the transformer; the second calculation unit 202 is used to calculate the basic health index of the transformer according to the component degradation index, the online chromatographic degradation index and the initial health index of the transformer; the acquisition unit 203 is used to correct the basic health index of the transformer according to the hidden danger correction coefficient and the environmental correction coefficient predetermined by the historical operating condition data within a preset period, so as to obtain the comprehensive health index of the transformer.

[0132] Specifically, the first calculation unit 201 in the device is used to calculate the initial health index of the transformer according to the initial state quantity score values ​​and dynamic weights corresponding to each state quantity of the transformer; the second calculation unit 202 is used to calculate the basic health index of the transformer according to the component degradation index, the online chromatographic degradation index and the initial health index of the transformer; the acquisition unit 203 is used to correct the basic health index of the transformer according to the hidden danger correction coefficient and the environmental correction coefficient predetermined by the historical operating condition data within a preset period, so as to obtain the comprehensive health index of the transformer.

[0133] The transformer comprehensive health index acquisition device provided in the embodiment of the present invention calculates the initial health index of the transformer according to the initial state quantity score values ​​and dynamic weights respectively corresponding to each state quantity of the transformer; calculates the basic health index of the transformer according to the component degradation index of the transformer, the online chromatographic degradation index and the initial health index; corrects the basic health index of the transformer according to the hidden danger correction coefficient and the environmental correction coefficient predetermined by the historical operating condition data within a preset period to obtain the comprehensive health index of the transformer, which can improve the accuracy, timeliness and objectivity of the transformer health assessment.

[0134] The embodiment of the present invention provides an embodiment of a transformer comprehensive health index acquisition device which can be specifically used to execute the processing flow of the above-mentioned method embodiments. Its functions are not repeated here, and reference can be made to the detailed description of the above-mentioned method embodiments.

[0135] Figure 3 A schematic diagram of the physical structure of an electronic device provided in an embodiment of the present invention, such as Figure 3 As shown, the electronic device includes: a processor (processor) 301, a memory (memory) 302 and a bus 303;

[0136] The processor 301 and the memory 302 communicate with each other via a bus 303;

[0137] The processor 301 is used to call the program instructions in the memory 302 to execute the methods provided by the above method embodiments, for example, including:

[0138] The initial health index of the transformer is calculated based on the initial state quantity score values ​​and dynamic weights corresponding to each state quantity of the transformer;

[0139] Calculating a transformer basic health index according to the transformer component degradation index, the online chromatogram degradation index and the initial health index;

[0140] The transformer basic health index is corrected according to the hidden danger correction coefficient and the environmental correction coefficient predetermined by the historical operating condition data within a preset period to obtain the transformer comprehensive health index.

[0141] This embodiment discloses a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can perform the methods provided by the above method embodiments, for example, including:

[0142] The initial health index of the transformer is calculated based on the initial state quantity score values ​​and dynamic weights corresponding to each state quantity of the transformer;

[0143] Calculating a transformer basic health index according to the transformer component degradation index, the online chromatogram degradation index and the initial health index;

[0144] The transformer basic health index is corrected according to the hidden danger correction coefficient and the environmental correction coefficient predetermined by the historical operating condition data within a preset period to obtain the transformer comprehensive health index.

[0145] This embodiment provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, wherein the computer program enables the computer to execute the methods provided by the above method embodiments, for example, including:

[0146] The initial health index of the transformer is calculated based on the initial state quantity score values ​​and dynamic weights corresponding to each state quantity of the transformer;

[0147] Calculating a transformer basic health index according to the transformer component degradation index, the online chromatogram degradation index and the initial health index;

[0148] The transformer basic health index is corrected according to the hidden danger correction coefficient and the environmental correction coefficient predetermined by the historical operating condition data within a preset period to obtain the transformer comprehensive health index.

[0149] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0150] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0151] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0152] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0153] In the description of this specification, the description with reference to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0154] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for obtaining a comprehensive health index of a transformer, characterized in that: include: The initial health index of the transformer is calculated based on the initial state quantity score values ​​and dynamic weights corresponding to each state quantity of the transformer; Calculating a transformer basic health index according to the transformer component degradation index, the online chromatogram degradation index and the initial health index; The transformer basic health index is corrected according to the hidden danger correction coefficient and the environmental correction coefficient predetermined by the historical operating condition data within a preset period to obtain the transformer comprehensive health index.

2. The method for obtaining the comprehensive health index of a transformer according to claim 1, characterized in that: The step of calculating the transformer basic health index according to the transformer component degradation index, the online chromatogram degradation index and the initial health index includes: The transformer basic health index is calculated according to the following expression: Among them, HI com is the transformer basic health index, is the initial health index, is the component degradation index, χ DGA is the online chromatographic degradation index, 3. The method for obtaining the comprehensive health index of a transformer according to claim 1, characterized in that: Determining the hidden danger correction factor includes: Determine the number of occurrences of hidden dangers corresponding to each hidden danger level in the preset period according to the historical operating condition data; According to the hidden danger level adjustment factors corresponding to the occurrence times of each hidden danger, the occurrence times of each hidden danger are adjusted to obtain the hidden danger risk score; The hidden danger correction coefficient is calculated according to the first preset piecewise function and the numerical interval of the hidden danger risk score; Among them, the first preset piecewise function takes the hidden danger risk score as the independent variable, and the piecewise function parameter value is obtained by fitting the historical operating condition data.

4. The method for obtaining the comprehensive health index of a transformer according to claim 3 is characterized in that: The adjustment factors for each hazard level increase in sequence according to the degree of hazard risk of each hazard level.

5. The method for obtaining the comprehensive health index of a transformer according to claim 1, characterized in that: Determining the environmental correction factor includes: Determine the transformer ambient temperature value in the preset period according to the historical operating condition data; The environmental correction coefficient is calculated according to the second preset piecewise function and the numerical interval of the transformer ambient temperature value; The second preset piecewise function takes the transformer ambient temperature value as an independent variable, and the piecewise function parameter value is obtained by fitting the historical operating condition data.

6. The method for obtaining the comprehensive health index of a transformer according to any one of claims 1 to 5, characterized in that: Obtaining the component degradation index, including: Determine the status information corresponding to each transformer component of the transformer, and determine the deduction value of each transformer component under the corresponding status information; The component degradation index is calculated based on the deduction value of each transformer component under the corresponding state information and the weight of the corresponding transformer component.

7. The method for obtaining the comprehensive health index of a transformer according to any one of claims 1 to 5, characterized in that: Obtaining the online chromatographic degradation index includes: The chromatographic status data of the transformer are obtained, and the online chromatographic degradation index is calculated according to the chromatographic status data and the weight of the corresponding chromatographic status data.

8. A device for obtaining a comprehensive health index of a transformer, characterized in that: include: A first calculation unit, configured to calculate an initial health index of the transformer according to initial state quantity scores and dynamic weights respectively corresponding to various state quantities of the transformer; A second calculation unit is used to calculate a basic health index of the transformer according to the component degradation index, the online chromatogram degradation index and the initial health index of the transformer; The acquisition unit is used to correct the basic health index of the transformer according to the hidden danger correction coefficient and the environmental correction coefficient predetermined by the historical operating condition data within a preset period to obtain the comprehensive health index of the transformer.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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