Performance evaluation method and system for oil paper insulating layer of transformer

Abstract

The embodiment of the invention provides a performance evaluation method and system for a transformer oil paper insulating layer, and belongs to the technical field of transformers. The performance evaluation method comprises the following steps: determining a plurality of oil paper insulating layers of the transformer; acquiring a plurality of index parameters of the oil paper insulating layer; performing data processing on the index parameters; and evaluating the performance of the oil paper insulating layer corresponding to the index parameters according to the index parameters after data processing. The performance evaluation method can be used for evaluating the performance of the oil paper insulating layer.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, and in particular to a performance evaluation method and system for an oil-paper insulation layer of a transformer. Background Art

[0002] The oil-paper insulation system is a common transformer insulation structure. Its working principle is to use insulating oil to fill the gaps in the insulating paper to provide an additional insulation layer and insulation performance. This structure can effectively isolate and protect the transformer coil, prevent current leakage and breakdown, and thus ensure the safe operation and stability of the transformer. However, in the prior art, there is no method specifically for evaluating the performance of the oil-paper insulation layer. Summary of the invention

[0003] The purpose of the embodiments of the present invention is to provide a method and system for evaluating the performance of an oil-paper insulation layer of a transformer. The performance evaluation method can evaluate the performance of the oil-paper insulation layer.

[0004] In order to achieve the above object, an embodiment of the present invention provides a performance evaluation method for a transformer oil-paper insulation layer, the performance evaluation method comprising:

[0005] determining a plurality of oil-paper insulation layers of the transformer;

[0006] Obtaining multiple index parameters of the oil-paper insulation layer;

[0007] Performing data processing on the indicator parameters;

[0008] The performance of the corresponding oil-paper insulation layer is evaluated according to the index parameters after data processing.

[0009] Optionally, performing data processing on the indicator parameter includes:

[0010] Obtaining multiple index parameters of the oil-paper insulation layer;

[0011] Determine whether the indicator parameters are all less than the corresponding preset thresholds;

[0012] When the indicator parameters are all smaller than the corresponding preset thresholds, the indicator parameters are retained.

[0013] Optionally, performing data processing on the indicator parameter includes:

[0014] When the indicator parameters are not all smaller than the corresponding preset thresholds, the indicator parameters are discarded.

[0015] Optionally, performing data processing on the indicator parameter includes:

[0016] Obtaining multiple index parameters of the oil-paper insulation layer;

[0017] The index parameters are judged to obtain positive parameters having positive feedback on the performance of the oil-paper insulation layer and negative parameters having negative feedback on the performance of the oil-paper insulation layer;

[0018] The negative parameters are subjected to isotropic processing to obtain corrected positive parameters;

[0019] Combine the forward parameters and the modified forward parameters into the initial parameters.

[0020] Optionally, performing data processing on the indicator parameter includes:

[0021] Obtaining the initial parameters;

[0022] According to the initial parameters, unifying the units of parameters of the same category in the initial parameters;

[0023] According to the classification of the parameters in the initial parameters, a basic scale of the parameters in each category is preset;

[0024] The various parameters in the initial parameters after unit unification are divided by the corresponding basic scale to obtain the corresponding basic parameters.

[0025] Optionally, evaluating the performance of the corresponding oil-paper insulation layer according to the index parameter after data processing includes:

[0026] Get the basic parameters of each category;

[0027] Converting the basic parameters into a first parameter vector according to the basic parameters;

[0028] Obtaining a second parameter vector of parameters of each category of the oil-paper insulation layer in an ideal state;

[0029] Calculate the dot product of the first parameter vector and the second parameter vector of the corresponding category;

[0030] Divide the dot product of the two vectors by the product of their magnitudes to get the degree of closeness;

[0031] Weights are assigned to the closeness of the parameters of each category and added together to obtain the comprehensive closeness;

[0032] The performance of the corresponding oil-paper insulation layer is judged according to the value of the comprehensive closeness.

[0033] Through the above technical solution, the present invention provides a method and system for evaluating the performance of the oil-paper insulation layer of a transformer, which obtains multiple index parameters about the oil-paper insulation layer by obtaining multiple oil-paper insulation layers of the transformer. After obtaining the index parameters, data processing can be performed on the index parameters. After data processing of the index parameters, the index parameters can be made to meet the requirements more. According to the index parameters after data processing, the performance of the corresponding oil-paper insulation layer can be evaluated.

[0034] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0036] Figure 1 is a flow chart of a performance evaluation index of a transformer oil-paper insulation layer according to an embodiment of the present invention;

[0037] Figure 2 Data processing is performed on a performance evaluation index of a transformer oil-paper insulation layer according to an embodiment of the present invention;

[0038] Figure 3 is a flow chart of obtaining initial parameters of a performance evaluation index of a transformer oil-paper insulation layer according to an embodiment of the present invention;

[0039] Figure 4 is a flow chart of obtaining basic parameters of a performance evaluation index of a transformer oil-paper insulation layer according to an embodiment of the present invention;

[0040] Figure 5 The present invention is a flowchart of evaluating the performance of a transformer oil-paper insulation layer performance evaluation index according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0042] Figure 1 The flowchart of a performance evaluation index of a transformer oil-paper insulation layer according to an embodiment of the present invention. In the present invention, the process of the performance evaluation method may include:

[0043] In step S1 , a plurality of oil-paper insulation layers of a transformer are determined.

[0044] In step S2, a plurality of index parameters of the oil-paper insulation layer are obtained.

[0045] In step S3, data processing is performed on the indicator parameters.

[0046] In step S4, the performance of the corresponding oil-paper insulation layer is evaluated according to the index parameters after data processing.

[0047] In the present invention, when evaluating the oil-paper insulation layer of the transformer, multiple oil-paper insulation layers of the transformer can be obtained first. After obtaining the oil-paper insulation layer, multiple index parameters of the oil-paper insulation layer can be obtained, and then data processing can be performed on the index parameters so that the index parameters can meet subsequent calculation requirements. After the index parameters are processed, the performance of the corresponding oil-paper insulation layer can be evaluated according to the index parameters.

[0048] In one embodiment of the present invention, Figure 2 As shown, the process of data processing may include:

[0049] In step S5, a plurality of index parameters of the oil-paper insulation layer are obtained.

[0050] In step S6, it is determined whether the indicator parameters are all smaller than the corresponding preset thresholds.

[0051] In step S7, when the indicator parameters are all smaller than the corresponding preset thresholds, the indicator parameters are retained.

[0052] In the present invention, after the index parameters are obtained, some of the index parameters of the oil-paper insulation layer may not meet the requirements. Therefore, the index parameters can be processed to obtain index parameters that meet the requirements. By judging whether all the index parameters are less than the corresponding preset thresholds, it is judged whether the performance of the oil-paper insulation layer meets the requirements. When the index parameters are less than the corresponding preset thresholds, it can be shown that the oil-paper insulation layer meets the requirements, and its corresponding parameters can be used to evaluate its performance, so its parameters can be retained.

[0053] In one embodiment of the present invention, Figure 2 As shown, the process of data processing may include:

[0054] In step S8, when the indicator parameters are not all smaller than the corresponding preset thresholds, the indicator parameters are discarded.

[0055] In the present invention, when one or more of the index parameters of the oil-paper insulation layer exceeds the corresponding preset threshold value, it can be indicated that the oil-paper insulation layer no longer meets the requirements, so the oil-paper insulation layer and the corresponding index parameters can be discarded.

[0056] In one embodiment of the present invention, Figure 3 As shown, the process of obtaining initial parameters may include:

[0057] In step S9, a plurality of index parameters of the oil-paper insulation layer are obtained.

[0058] In step S10, the index parameters are judged to obtain positive parameters for positive feedback of the performance oil of the oil-paper insulation layer and negative parameters for negative feedback of the performance oil of the oil-paper insulation layer.

[0059] In step S11, the negative parameters are subjected to isotropic processing to correct the positive parameters.

[0060] In step S12, the forward parameters and the modified forward parameters are combined into initial parameters.

[0061] In the present invention, after obtaining multiple index parameters of the oil-paper insulation layer, the multiple index parameters may have different effects on the performance of the oil-paper insulation layer. The larger the data of some index parameters, the better the corresponding performance, and the smaller the data of some index parameters, the better the corresponding performance. Therefore, after obtaining the index parameters, the index parameters may be judged to obtain positive parameters with positive feedback on the performance of the oil-paper insulation layer and negative parameters with negative feedback in the index parameters, and then the negative parameters may be processed in the same direction to obtain the modified positive parameters, and the positive parameters and the modified positive parameters may be combined into the initial parameters.

[0062] In one embodiment of the present invention, Figure 4 As shown, the process of obtaining basic parameters may include:

[0063] In step S13, initial parameters are obtained.

[0064] In step S14, based on the initial parameters, the units of parameters of the same category in the initial parameters are unified.

[0065] In step S15, according to the classification of the parameters in the initial parameters, a basic scale of the parameters in each category is preset.

[0066] In step S16, each type of parameter in the initial parameters after unit unification is divided by the corresponding basic scale to obtain the corresponding basic parameters.

[0067] In the present invention, after the initial parameters are obtained, the number of the initial parameters may be multiple, and the units and magnitudes of the multiple initial parameters may be different. Therefore, in order to avoid the adverse effects as much as possible and objectively reflect the true level of the evaluated object, the units of the multiple initial parameters can be classified, and the multiple initial parameters can be normalized and standardized to obtain the basic parameters.

[0068] In one embodiment of the present invention, Figure 5 As shown, the process of evaluating performance may include:

[0069] In step S17, basic parameters of each category are obtained.

[0070] In step S18, it is converted into a first parameter vector according to the basic parameters.

[0071] In step S19, a second parameter vector of parameters of each category of the oil-paper insulation layer in an ideal state is obtained.

[0072] In step S20 , the dot product of the first parameter vector and the second parameter vector of the corresponding category is calculated.

[0073] In step S21 , the dot product of the two vectors is divided by the product of the moduli of the two vectors to obtain the degree of closeness.

[0074] In step S22, weights are assigned to the closeness of the parameters of each category and the weights are added together to obtain a comprehensive closeness.

[0075] In step S23, the performance of the corresponding oil-paper insulation layer is determined according to the value of the comprehensive closeness.

[0076] In the present invention, after obtaining the basic parameters of each category, the basic parameters of each category can be converted into a first parameter vector. After obtaining the first parameter vector, the second parameter vector of the parameters of each category of the ideal oil-paper insulation layer can be obtained. After obtaining the first parameter vector and the second parameter vector, the dot product of the first parameter vector and the second parameter vector of the corresponding category can be calculated. After obtaining the dot product, the dot product of the two vectors can be divided by the module length product of the two vectors to obtain the closeness. The closeness can indicate the similarity between the index parameters of the oil-paper insulation layer and the parameters of the ideal oil-paper insulation layer. The greater the similarity, the better its performance. After obtaining the closeness of the parameters of each category, the closeness of the parameters of each category can be weighted and added to obtain the comprehensive closeness, and then the performance of the corresponding oil-paper insulation layer can be judged according to the value of the comprehensive closeness.

[0077] On the other hand, the present invention also provides a performance evaluation system for a transformer oil-paper insulation layer, the performance evaluation system comprising: a parameter acquisition unit and a computing unit. The parameter acquisition unit can acquire parameters of the transformer oil-paper insulation layer. The computing unit can execute the above-mentioned method for evaluating the performance of a transformer oil-paper insulation layer according to the parameters.

[0078] Through the above technical solution, the present invention provides a method and system for evaluating the performance of the oil-paper insulation layer of a transformer, which obtains multiple index parameters about the oil-paper insulation layer by obtaining multiple oil-paper insulation layers of the transformer. After obtaining the index parameters, data processing can be performed on the index parameters. After data processing of the index parameters, the index parameters can be made to meet the requirements more. According to the index parameters after data processing, the performance of the corresponding oil-paper insulation layer can be evaluated.

[0079] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0080] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes 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 generate 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.

[0081] 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.

[0082] 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 The steps for the functions specified in one or more boxes.

[0083] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0084] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0085] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0086] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0087] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A method for evaluating the performance of transformer oil-paper insulation layer, characterized in that: The performance evaluation method comprises: determining a plurality of oil-paper insulation layers of the transformer; Obtaining multiple index parameters of the oil-paper insulation layer; Performing data processing on the indicator parameters; The performance of the corresponding oil-paper insulation layer is evaluated according to the index parameters after data processing.

2. The performance evaluation method according to claim 1, characterized in that: The data processing of the indicator parameters includes: Obtaining multiple index parameters of the oil-paper insulation layer; Determine whether the indicator parameters are all less than the corresponding preset thresholds; When the indicator parameters are all smaller than the corresponding preset thresholds, the indicator parameters are retained.

3. The performance evaluation method according to claim 2, characterized in that: The data processing of the indicator parameters includes: When the indicator parameters are not all smaller than the corresponding preset thresholds, the indicator parameters are discarded.

4. The performance evaluation method according to claim 2, characterized in that: The data processing of the indicator parameters includes: Obtaining multiple index parameters of the oil-paper insulation layer; The index parameters are judged to obtain positive parameters having positive feedback on the performance of the oil-paper insulation layer and negative parameters having negative feedback on the performance of the oil-paper insulation layer; The negative parameters are subjected to isotropic processing to obtain corrected positive parameters; Combine the forward parameters and the modified forward parameters into the initial parameters.

5. The performance evaluation method according to claim 4, characterized in that: The data processing of the indicator parameters includes: Obtaining the initial parameters; According to the initial parameters, unifying the units of parameters of the same category in the initial parameters; According to the classification of the parameters in the initial parameters, a basic scale of the parameters in each category is preset; The various parameters in the initial parameters after unit unification are divided by the corresponding basic scale to obtain the corresponding basic parameters.

6. The performance evaluation method according to claim 5, characterized in that: The performance of the oil-paper insulation layer corresponding to the index parameters after data processing is evaluated as follows: Get the basic parameters of each category; Converting the basic parameters into a first parameter vector according to the basic parameters; Obtaining a second parameter vector of parameters of each category of the oil-paper insulation layer in an ideal state; Calculate the dot product of the first parameter vector and the second parameter vector of the corresponding category; Divide the dot product of the two vectors by the product of their magnitudes to get the degree of closeness; Weights are assigned to the closeness of the parameters of each category and added together to obtain the comprehensive closeness; The performance of the corresponding oil-paper insulation layer is determined according to the value of the comprehensive closeness.

7. A performance evaluation system for transformer oil-paper insulation layer, characterized in that: The performance evaluation system comprises: A parameter acquisition unit, for acquiring parameters of the oil-paper insulation layer of the transformer; The computing unit executes the performance evaluation method of the transformer oil-paper insulation layer according to any one of claims 1 to 6 according to the parameters.

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