Method and device for designing the mechanical strength of the inner and outer insulation of a dc dry bushing

Abstract

The application relates to a design method and device for the mechanical strength cooperation of inner and outer insulation of a direct-current dry bushing, computer equipment, a storage medium and a computer program product. The method comprises the following steps: selecting initial information of a target direct-current dry bushing; determining a mechanical model response characteristic expected value and an electromagnetic field model response characteristic expected value; obtaining a mechanical model response characteristic curve and an electromagnetic field model response characteristic curve based on the initial information; calculating a first mechanical deviation between the mechanical model response characteristic expected value and the mechanical model response characteristic curve, and calculating a first electromagnetic field deviation between the electromagnetic field model response characteristic expected value and the electromagnetic field model response characteristic curve; and according to the first mechanical deviation and the first electromagnetic field deviation, the initial information is adjusted and optimized to determine target information of the target direct-current dry bushing. The method can improve the reliability of the design of the direct-current dry bushing.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of power equipment, in particular to a design method and device for mechanical strength cooperation of inner and outer insulation of a DC dry bushing. BACKGROUND

[0002] With the construction of AC / DC projects in China, the DC dry bushing has been widely applied. As an important component of electrical equipment, the DC dry bushing mainly bears various electrical and mechanical stresses, and its reliability is crucial for the safe and reliable operation of the equipment body. In recent years, the DC dry bushing has been widely used in transformer, reactor, valve hall wall-penetrating and other scenes due to its advantages of oil-free, explosion-proof and stable electrical characteristics. The design of the key components of the DC dry bushing, i.e. the hollow composite insulator and the core, is an electrical and mechanical optimization process, and the two elements are mutually restricted. The design principle is to balance the electrical and force parameters of the hollow composite insulator and the core of the DC dry bushing according to the requirements of the working conditions, so that the electric field and stress of the DC dry bushing meet the design requirements.

[0003] At present, reasonable design during the design stage of the hollow composite insulator and the core has been considered as an effective method to improve the operation reliability of the power equipment. Whether the characteristic curve matching is reasonable or not not only affects the use effect of the hollow composite insulator and the core, but more importantly, improper matching will cause unnecessary waste and increase the management difficulty. The traditional design method of the hollow composite insulator and the core is to design each parameter information separately based on the design specification. However, separate design may cause the problem of unreliable matching design of the DC dry bushing, thereby leading to the unreliable operation state of the power equipment. Therefore, how to improve the reliability of the design of the DC dry bushing is a problem to be solved. SUMMARY

[0004] Therefore, it is necessary to provide a design method, device and computer equipment for the mechanical strength cooperation of the inner and outer insulation of a DC dry bushing, which can improve the reliability of the design of the DC dry bushing.

[0005] In a first aspect, the application provides a design method for the mechanical strength cooperation of the inner and outer insulation of a DC dry bushing. The method comprises:

[0006] selecting initial information of a target DC dry bushing, the initial information comprising an initial prior design scheme, initial material characteristics and an initial load curve of the target DC dry bushing;

[0007] determining a mechanical model response characteristic expectation value and an electromagnetic field model response characteristic expectation value;

[0008] based on the initial information, obtaining a mechanical model response characteristic curve and an electromagnetic field model response characteristic curve;

[0009] calculate a first mechanical deviation between the mechanical model response characteristic expected value and the mechanical model response characteristic curve, and calculate a first electromagnetic field deviation between the electromagnetic field model response characteristic expected value and the electromagnetic field model response characteristic curve;

[0010] According to the first mechanical deviation and the first electromagnetic field deviation, the initial information is optimized and adjusted to determine target information of the target DC dry bushing, and the target information includes target material, target process, and target structure parameters.

[0011] In one of the embodiments, the method further includes:

[0012] selecting an electromagnetic performance response characteristic function and a mechanical performance response characteristic function;

[0013] constructing a target parameterized model of the target DC dry bushing under the mechanical action and the electromagnetic action in operation;

[0014] based on the initial information, obtaining the mechanical model response characteristic curve and the electromagnetic field model response characteristic curve, including:

[0015] under the full working condition, taking the initial information as an input of the target parameterized model, so that the target parameterized model outputs the mechanical model response characteristic curve and the electromagnetic field model response characteristic curve according to the electromagnetic performance response characteristic function and the mechanical performance response characteristic function, and the full working condition is all external influences on the target DC dry bushing in operation.

[0016] In one of the embodiments, the mechanical model response characteristic expected value includes a maximum displacement and an allowable stress, and the electromagnetic field model response characteristic expected value includes an allowable field strength;

[0017] calculating a first mechanical deviation between the mechanical model response characteristic expected value and the mechanical model response characteristic curve, and calculating a first electromagnetic field deviation between the electromagnetic field model response characteristic expected value and the electromagnetic field model response characteristic curve, including:

[0018] calculating a first amplitude difference between the maximum displacement and the simulated displacement, and calculating a second amplitude difference between the allowable stress and the simulated stress, and the first mechanical deviation includes the first amplitude difference and the second amplitude difference;

[0019] calculating a third amplitude difference between the allowable field strength and the simulated field strength, and the first electromagnetic field deviation is the third amplitude difference.

[0020] In one of the embodiments, the first target parameter information and the second target parameter information are determined by the first field strength difference value, the second field strength difference value, the first stress difference value, and the simulated displacement and the maximum displacement, including:

[0021] If the first field strength difference value is less than the field strength difference threshold value, the second field strength difference value is less than the magnetic field strength difference threshold value, the first stress difference value is less than the stress difference threshold value, and the simulated displacement is less than the maximum displacement, the first initial parameter information is determined as the first target parameter information, and the second initial parameter information is determined as the second target parameter information.

[0022] In one of the embodiments, the initial information is optimized and adjusted according to the first mechanical deviation and the first electromagnetic field deviation to determine the target information of the target DC dry bushing, including:

[0023] If the first mechanical deviation is greater than the mechanical deviation threshold value, the initial information is optimized and adjusted.

[0024] Based on the adjusted initial information, the adjusted mechanical model response characteristic curve and the adjusted electromagnetic field model response characteristic curve are obtained.

[0025] If the second mechanical deviation between the mechanical model response characteristic expectation value and the adjusted mechanical model response characteristic curve is less than the mechanical deviation threshold value, and the second electromagnetic field deviation between the electromagnetic field model response characteristic expectation value and the adjusted electromagnetic field model response characteristic curve is less than the electromagnetic field deviation threshold value, the target information of the target DC dry bushing is determined based on the adjusted initial information.

[0026] In one of the embodiments, the initial information is optimized and adjusted according to the first electromagnetic field deviation and the first electromagnetic field deviation to determine the target information of the target DC dry bushing, including:

[0027] If the first electromagnetic field deviation is greater than the electromagnetic field deviation threshold value, the initial information is optimized and adjusted.

[0028] Based on the adjusted initial information, the adjusted mechanical model response characteristic curve and the adjusted electromagnetic field model response characteristic curve are obtained.

[0029] If the second electromagnetic field deviation between the electromagnetic field model response characteristic expectation value and the adjusted electromagnetic field model response characteristic curve is less than the electromagnetic field deviation threshold value, and the second mechanical deviation between the mechanical model response characteristic expectation value and the adjusted mechanical model response characteristic curve is less than the mechanical deviation threshold value, the target information of the target DC dry bushing is determined based on the adjusted initial information.

[0030] In one of the embodiments, the target DC dry bushing is composed of the target hollow composite insulator and the target DC dry bushing core.

[0031] The initial information of the target DC dry bushing is selected, including:

[0032] select first initial sub-information of the target hollow composite insulator and second initial sub-information of the target DC dry bushing core, the first initial sub-information including initial prior design scheme, initial material characteristics and initial load curve of the target hollow composite insulator, and the second initial sub-information including initial prior design scheme, initial material characteristics and initial load curve of the target DC dry bushing core;

[0033] generate initial information based on the first initial sub-information and the second initial sub-information;

[0034] The target information specifically includes target material, target process and target structure parameter of the target hollow composite insulator, and target material, target process and target structure parameter of the target DC dry bushing core.

[0035] In a second aspect, the present application further provides a device for designing mechanical strength cooperation of inner and outer insulation of a DC dry bushing. The device comprises:

[0036] The selecting module is configured to select initial information of the target DC dry bushing, the initial information including initial prior design scheme, initial material characteristics and initial load curve of the target DC dry bushing;

[0037] The determining module is configured to determine mechanical model response characteristic expectation value and electromagnetic field model response characteristic expectation value;

[0038] The obtaining module is configured to obtain mechanical model response characteristic curve and electromagnetic field model response characteristic curve based on the initial information;

[0039] The calculating module is configured to calculate first mechanical deviation between the mechanical model response characteristic expectation value and the mechanical model response characteristic curve, and calculate first electromagnetic field deviation between the electromagnetic field model response characteristic expectation value and the electromagnetic field model response characteristic curve;

[0040] The determining module is further configured to optimize and adjust the initial information according to the first mechanical deviation and the first electromagnetic field deviation, so as to determine target information of the target DC dry bushing, the target information including target material, target process and target structure parameter.

[0041] In a third aspect, the present application further provides a computer device. The computer device comprises a memory and a processor, the memory stores a computer program, and the processor realizes the following steps when executing the computer program:

[0042] select initial information of the target DC dry bushing, the initial information including initial prior design scheme, initial material characteristics and initial load curve of the target DC dry bushing;

[0043] Determine the expected values ​​of the response characteristics of the mechanical model and the electromagnetic field model;

[0044] Based on the initial information, obtain the response characteristic curves of the mechanical model and the electromagnetic field model;

[0045] Calculate the first mechanical deviation between the expected value of the response characteristics of the mechanical model and the response characteristic curve of the mechanical model, and calculate the first electromagnetic deviation between the expected value of the response characteristics of the electromagnetic field model and the response characteristic curve of the electromagnetic field model.

[0046] Based on the first mechanical deviation and the first electromagnetic field deviation, the initial information is optimized and adjusted to determine the target information of the target DC dry bushing. The target information includes the target material, target process, and target structural parameters.

[0047] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, performs the following steps:

[0048] Select the initial information for the target DC dry bushing, including the initial prior design scheme, initial material properties, and initial load curve of the target DC dry bushing;

[0049] Determine the expected values ​​of the response characteristics of the mechanical model and the electromagnetic field model;

[0050] Based on the initial information, obtain the response characteristic curves of the mechanical model and the electromagnetic field model;

[0051] Calculate the first mechanical deviation between the expected value of the response characteristics of the mechanical model and the response characteristic curve of the mechanical model, and calculate the first electromagnetic deviation between the expected value of the response characteristics of the electromagnetic field model and the response characteristic curve of the electromagnetic field model.

[0052] Based on the first mechanical deviation and the first electromagnetic field deviation, the initial information is optimized and adjusted to determine the target information of the target DC dry bushing. The target information includes the target material, target process, and target structural parameters.

[0053] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, performs the following steps:

[0054] Select the initial information for the target DC dry bushing, including the initial prior design scheme, initial material properties, and initial load curve of the target DC dry bushing;

[0055] Determine the expected values ​​of the response characteristics of the mechanical model and the electromagnetic field model;

[0056] Based on the initial information, obtain the response characteristic curves of the mechanical model and the electromagnetic field model;

[0057] Calculate the first mechanical deviation between the expected value of the response characteristics of the mechanical model and the response characteristic curve of the mechanical model, and calculate the first electromagnetic deviation between the expected value of the response characteristics of the electromagnetic field model and the response characteristic curve of the electromagnetic field model.

[0058] Based on the first mechanical deviation and the first electromagnetic field deviation, the initial information is optimized and adjusted to determine the target information of the target DC dry bushing. The target information includes the target material, target process, and target structural parameters.

[0059] The aforementioned design method, apparatus, computer equipment, storage medium, and computer program product for the internal and external insulation mechanical strength coordination of DC dry bushings first selects the initial information of the target DC dry bushing. This initial information includes the initial a priori design scheme, initial material properties, and initial load curves of the target DC dry bushing. It then determines the expected values ​​of the mechanical model response characteristics and the electromagnetic field model response characteristics. Based on the initial information, it obtains the mechanical model response characteristic curves and the electromagnetic field model response characteristic curves. Next, it calculates the first mechanical deviation between the expected value of the mechanical model response characteristic and the mechanical model response characteristic curve, and the first electromagnetic field deviation between the expected value of the electromagnetic field model response characteristic and the electromagnetic field model response characteristic curve. Based on these first mechanical deviations and first electromagnetic field deviations, it optimizes and adjusts the initial information to determine the target information of the target DC dry bushing. The target information includes the target material, target process, and target structural parameters. By using the above method, based on the initial information of the target DC dry bushing, electromagnetic field characteristic simulation and mechanical characteristic simulation are performed to obtain electromagnetic field response characteristics and mechanical response characteristics. Taking into account the electromagnetic field response characteristics and mechanical response characteristics, the initial information is adjusted to obtain the target information of the target DC dry bushing. This avoids the problem of unreliable matching design caused by designing the electromagnetic field response characteristics and mechanical response characteristics separately, thereby improving the reliability of DC dry bushing design. Attached Figure Description

[0060] Figure 1 This is a flowchart illustrating the design method for the mechanical strength matching of the inner and outer insulation of a DC dry bushing in one embodiment.

[0061] Figure 2 This is a flowchart illustrating the process of obtaining the response characteristic curves of the mechanical model and the electromagnetic field model in one embodiment.

[0062] Figure 3 This is a flowchart illustrating the calculation of the first mechanical deviation and the first electromagnetic field deviation in one embodiment.

[0063] Figure 4 This is a flowchart illustrating the process of determining target information for a target DC dry bushing in one embodiment.

[0064] Figure 5 This is a flowchart illustrating the process of determining target information for a target DC dry bushing in another embodiment.

[0065] Figure 6 This is a flowchart illustrating the initial information for selecting a target DC dry bushing in one embodiment.

[0066] Figure 7 This is a schematic diagram of the overall process of the design method for the mechanical strength matching of the internal and external insulation of a DC dry bushing in one embodiment;

[0067] Figure 8 This is a structural block diagram of a device for designing the mechanical strength matching of internal and external insulation of a DC dry bushing in one embodiment.

[0068] Figure 9 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0069] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0070] Before providing a further detailed description of the embodiments of this application, the nouns and terms involved in the embodiments of this invention are explained, and the nouns and terms involved in the embodiments of this invention are subject to the following interpretations:

[0071] 1. DC dry bushing

[0072] DC dry bushings consist of hollow composite insulators, DC dry bushing cores, and other components.

[0073] 2. Hollow composite insulators

[0074] A hollow composite insulator consists of at least two insulating components: an insulating tube made of fiber-reinforced plastic, a silicone rubber sheath fitted over the insulating tube, and end fittings glued to both ends of the insulating tube. The insulating tube, made of fiber-reinforced plastic, is the inner insulating component of the hollow composite insulator, responsible for both internal insulation and mechanical load bearing. It is mainly manufactured using two methods: dry winding and wet winding. The silicone rubber sheath is the outer insulating component of the hollow composite insulator, made of highly hydrophobic silicone rubber. It protects the insulating tube from external environmental influences and provides a greater creepage distance to improve the external insulation level. The end fittings are important structural components of the hollow composite insulator, glued together with the insulating tube using specialized connection techniques. They bear the mechanical load and provide an internal seal. The end fittings are typically cast from high-strength aluminum alloy or cast steel, possessing good mechanical strength and corrosion resistance.

[0075] 3. DC dry bushing core

[0076] The core of a DC dry bushing is made by alternately rolling multiple layers of crepe paper and aluminum foil around a central guide rod, followed by epoxy resin vacuum casting and segmented curing. Its main insulating medium is epoxy-impregnated paper. Under normal operation, the DC dry bushing is subjected to electromechanical stress. The inner layer of the bushing core and the ends of the plates have high electric field strength; the bushing core is subjected to bending loads; and the interface effect between the epoxy crepe papers is prominent. Under these conditions, the electrical and mechanical properties of the capacitor core itself become the foundation for the safe and reliable operation of the dry bushing.

[0077] In one embodiment, such as Figure 1 As shown, a method for designing the mechanical strength matching of the inner and outer insulation of a DC dry bushing is provided. The embodiment uses the method applied to a server as an example for illustration; it can be understood that the method can also be applied to a terminal. In this embodiment, the method includes the following steps:

[0078] Step 102: Select the initial information of the target DC dry bushing. The initial information includes the initial prior design scheme, initial material properties, and initial load curve of the target DC dry bushing.

[0079] The target DC dry bushing is composed of a target hollow composite insulator and a target DC dry bushing core. The external insulation of the target DC dry bushing refers to the target hollow composite insulator, while the internal insulation refers to the target DC dry bushing core.

[0080] Specifically, in the process of designing the mechanical strength coordination of the internal and external insulation of the DC dry bushing, the server first needs to collect the specific design requirements and practical scenario requirements for the target DC dry bushing. Only then can the initial information of the target DC dry bushing be initially set based on the specific design requirements, scenario requirements and practical experience. This initial information includes the initial prior design scheme, initial material properties and initial load curve of the target DC dry bushing.

[0081] It should be understood that the target DC dry bushing introduced in this embodiment can be a ±100kV DC dry bushing. ±100kV DC dry bushing is a way of describing the voltage level of the target DC dry bushing within the product line of ±100kV DC dry bushings. In practical applications, it can also be specified to other voltage levels, such as ±800kV DC dry bushings. Therefore, the specific voltage level of the target DC dry bushing needs to be determined based on actual application requirements, and is not limited here.

[0082] Step 104: Determine the expected values ​​of the response characteristics of the mechanical model and the electromagnetic field model.

[0083] The server can also determine the expected values ​​of the mechanical model response characteristics and the electromagnetic field model response characteristics of the target DC dry bushing based on the specific design requirements. Specifically, the expected values ​​of the mechanical model response characteristics include the maximum displacement and allowable stress, while the expected values ​​of the electromagnetic field model response characteristics include the allowable field strength. Furthermore, in practical applications, the server needs to determine the expected values ​​of the mechanical model response characteristics and the electromagnetic field model response characteristics of the target DC dry bushing under all operating conditions, including wind load, self-weight, tensile force, and overvoltage, based on the specific design requirements, to ensure that the determined expected values ​​fully consider all external influences encountered during actual operation.

[0084] Step 106: Based on the initial information, obtain the response characteristic curves of the mechanical model and the electromagnetic field model.

[0085] The server can also construct a target parameterized model based on the specific design requirements of the target DC dry bushing. The initial information of the target DC dry bushing is used as the input of the target parameterized model, and the input will output the mechanical model response characteristic curve and the electromagnetic field model response characteristic curve.

[0086] Specifically, the mechanical model response characteristic curves include the response characteristic curves for the mechanical process of matching the target hollow composite insulator with the target DC dry bushing core, the response characteristic curves for the mechanical process of matching the target hollow composite insulator, and the response characteristic curves for the mechanical process of matching the target DC dry bushing core. Similarly, the electromagnetic field model response characteristic curves specifically include the response characteristic curves for the electromagnetic field process of matching the target hollow composite insulator with the target DC dry bushing core, the response characteristic curves for the electromagnetic field process of matching the target hollow composite insulator, and the response characteristic curves for the electromagnetic field process of matching the target DC dry bushing core.

[0087] Step 108: Calculate the first mechanical deviation between the expected value of the mechanical model response characteristics and the mechanical model response characteristic curve, and calculate the first electromagnetic field deviation between the expected value of the electromagnetic field model response characteristics and the electromagnetic field model response characteristic curve.

[0088] The server calculates the first mechanical deviation between the expected value of the mechanical model response characteristics and the mechanical model response characteristic curve. In practice, it is necessary to calculate the first mechanical deviation between the expected value of the mechanical model response characteristics and the performance of the mechanical model response characteristic curve. The performance of the mechanical model response characteristic curve is used to describe the response characteristic performance of the mechanical model response characteristic curve. The performance of the mechanical model response characteristic curve includes the simulated displacement and simulated stress output during the simulation.

[0089] Similarly, the server can also calculate the first electromagnetic field deviation between the expected value of the electromagnetic field model response characteristics and the electromagnetic field model response characteristic curve. In practice, it is necessary to calculate the first electromagnetic field deviation between the expected value of the electromagnetic field model response characteristics and the performance of the electromagnetic field model response characteristic curve. The performance of the electromagnetic field model response characteristic curve is used to describe the response characteristic performance of the electromagnetic field model response characteristic curve. The performance of the electromagnetic field model response characteristic curve includes the simulated field strength output during simulation.

[0090] Step 110: Based on the first mechanical deviation and the first electromagnetic field deviation, optimize and adjust the initial information to determine the target information of the target DC dry bushing. The target information includes the target material, target process, and target structural parameters.

[0091] The server optimizes and adjusts the initial information based on the first mechanical deviation and the first electromagnetic field deviation, and uses the expected values ​​of the mechanical model response characteristics and the expected values ​​of the electromagnetic field model response characteristics as optimization targets. Based on the optimization and adjustment results, the server outputs the target information of the target DC dry bushing, which includes the target material, target process, and target structural parameters of the target DC dry bushing.

[0092] It should be understood that if the initial information can be determined to meet the expected values ​​of the mechanical model response characteristics and the electromagnetic field model response characteristics based on the first mechanical deviation and the first electromagnetic field deviation, then there is no need to optimize or adjust the initial information, and the target information of the target DC dry bushing can be determined directly.

[0093] In the above-mentioned design method for the mechanical strength matching of internal and external insulation of DC dry bushings, based on the initial information of the target DC dry bushing, electromagnetic field characteristic simulation and mechanical characteristic simulation are performed to obtain electromagnetic field response characteristics and mechanical response characteristics. Taking into account the electromagnetic field response characteristics and mechanical response characteristics, the initial information is adjusted to obtain the target information of the target DC dry bushing. This avoids the problem of unreliable matching design caused by designing the electromagnetic field response characteristics and mechanical response characteristics separately, thereby improving the reliability of DC dry bushing design.

[0094] In one embodiment, such as Figure 2 As shown, the method for determining the parameter information of DC dry bushings also includes:

[0095] Step 202: Select the electromagnetic performance response characteristic function and the mechanical performance response characteristic function.

[0096] The server selects electromagnetic performance response characteristic function and mechanical performance response characteristic function based on the specific design requirements of the target DC dry bushing.

[0097] Step 204: Construct a parameterized model of the target DC dry bushing under mechanical and electromagnetic forces during operation.

[0098] The server can also construct a parameterized model of the target DC dry bushing under mechanical and electromagnetic forces during operation, based on the specific design requirements of the target DC dry bushing. Since the target DC dry bushing is composed of a target hollow composite insulator and a target DC dry bushing core, the target parameterized model is specifically a parameterized model of the target hollow composite insulator and the target DC dry bushing core under mechanical and electromagnetic forces during operation.

[0099] Step 106: Based on the initial information, obtain the response characteristic curves of the mechanical model and the electromagnetic field model, specifically including:

[0100] Step 206: Under full operating conditions, the initial information is used as the input to the target parameterized model so that the target parameterized model outputs the mechanical model response characteristic curve and the electromagnetic field model response characteristic curve based on the electromagnetic performance response characteristic function and the mechanical performance response characteristic function. Full operating conditions refer to all external influences experienced by the target DC dry bushing during operation.

[0101] To ensure the accuracy of the obtained response characteristic curves, the server needs to use the initial information as input to the target parameterized model under all operating conditions, including wind load, self-weight, tension, and overvoltage. Therefore, the target parameterized model outputs the mechanical model response characteristic curves and the electromagnetic field model response characteristic curves based on the electromagnetic performance response characteristic function and the mechanical performance response characteristic function. The full operating conditions represent all external influences experienced by the target DC dry bushing during operation, thus the obtained response characteristic curves fully consider all external influences encountered during actual operation.

[0102] Specifically, the server sets the initial a priori design scheme, initial material properties, and initial load curve of the target DC dry bushing as input conditions for the target parameterized model. Then, it sets the solution conditions for the electromagnetic performance response characteristic function and the mechanical performance response characteristic function of the target DC dry bushing. Thus, based on the initial a priori design scheme, initial material properties, and initial load curve of the target DC dry bushing, the mechanical model response characteristic curve and the electromagnetic field model response characteristic curve can be obtained through the solution conditions of the electromagnetic performance response characteristic function and the mechanical performance response characteristic function.

[0103] In this embodiment, considering the specific design requirements of the target DC dry bushing, the response characteristic function is selected and the target parameterized model is constructed. When solving the response characteristic curve, based on the specific design requirements of the target DC dry bushing and all external influences it is subjected to during operation, the obtained response characteristic curve can be guaranteed to be more consistent with the characteristic curve during actual operation and meet the actual operation requirements, thereby improving the accuracy and reliability of the response characteristic curve.

[0104] In one embodiment, such as Figure 3 As shown, the expected values ​​of the mechanical model response characteristics include the maximum displacement and allowable stress, while the expected values ​​of the electromagnetic field model response characteristics include the allowable field strength. Based on this, step 108 calculates the first mechanical deviation between the expected values ​​of the mechanical model response characteristics and the mechanical model response characteristic curve, and calculates the first electromagnetic field deviation between the expected values ​​of the electromagnetic field model response characteristics and the electromagnetic field model response characteristic curve, specifically including:

[0105] Step 302: Calculate the first amplitude difference between the maximum displacement and the simulated displacement, and calculate the second amplitude difference between the allowable stress and the simulated stress. The first mechanical deviation includes the first amplitude difference and the second amplitude difference.

[0106] As shown in step 108, the performance of the mechanical model response characteristic curve includes the simulated displacement and simulated stress output during the simulation, while the expected value of the mechanical model response characteristic includes the maximum displacement and allowable stress. Based on this, the server actually needs to calculate the first amplitude difference between the maximum displacement and the simulated displacement. This first amplitude difference describes the deviation between the mechanical model response characteristic curve and the expected value of the mechanical model response characteristic in the displacement dimension. Similarly, the server also needs to calculate the second amplitude difference between the allowable stress and the simulated stress. This second amplitude difference describes the deviation between the mechanical model response characteristic curve and the expected value of the mechanical model response characteristic in the stress dimension.

[0107] Based on this, the server can generate a first mechanical deviation through the first amplitude difference and the second amplitude difference. That is, the first mechanical deviation can describe the deviation between the mechanical model response characteristic curve and the expected mechanical model response characteristic in the displacement dimension and stress dimension.

[0108] Step 304: Calculate the third amplitude difference between the allowable field strength and the simulated field strength. The first electromagnetic field deviation is the third amplitude difference.

[0109] As shown in step 108, the performance of the electromagnetic field model response characteristic curve includes the simulated field strength output during simulation, while the expected value of the electromagnetic field model response characteristic includes the allowable field strength. Based on this, the server actually needs to calculate a third amplitude difference between the allowable field strength and the simulated field strength. This third amplitude difference describes the deviation between the electromagnetic field model response characteristic curve and the expected value of the electromagnetic field model response characteristic in the electromagnetic field dimension. Therefore, the server defines this third amplitude difference as the first electromagnetic field deviation, meaning the first electromagnetic field deviation describes the deviation between the electromagnetic field model response characteristic curve and the expected value of the electromagnetic field model response characteristic in the electromagnetic field dimension.

[0110] It should be understood that there is no timing constraint between steps 302 and 304.

[0111] In this embodiment, the deviation between the mechanical model response characteristic curve and the expected value of the mechanical model response characteristic in the stress dimension, and the deviation between the electromagnetic field model response characteristic curve and the expected value of the electromagnetic field model response characteristic in the electromagnetic field dimension are calculated respectively. This further avoids the problem of unreliable matching design caused by designing the electromagnetic field response characteristics and mechanical response characteristics separately, thereby improving the reliability of DC dry bushing design.

[0112] In one embodiment, such as Figure 4 As shown, step 110 involves optimizing and adjusting the initial information based on the first mechanical deviation and the first electromagnetic field deviation to determine the target information of the target DC dry bushing, including:

[0113] Step 402: If the first mechanical deviation is greater than the mechanical deviation threshold, then the initial information is optimized and adjusted.

[0114] based on Figure 3 In the embodiment shown, if the obtained first mechanical deviation is greater than the mechanical deviation threshold, it indicates that the initial prior design scheme or initial material properties in the initial information do not meet the design requirements, resulting in a large deviation between the simulated response characteristic curve and the expected value in the mechanical dimension. Therefore, the initial prior design scheme or initial material properties in the initial information are optimized and adjusted.

[0115] Step 404: Based on the adjusted initial information, obtain the adjusted mechanical model response characteristic curve and the adjusted electromagnetic field model response characteristic curve.

[0116] The server uses the adjusted initial information as input to the target parameterized model, and then sets the solution conditions for the electromagnetic and mechanical performance response function of the target DC dry bushing. Thus, based on the adjusted initial information and the solution conditions for the electromagnetic and mechanical performance response function, the server can obtain the adjusted mechanical model response curve and the adjusted electromagnetic field model response curve. The method for obtaining the response curves is similar to the aforementioned embodiments and will not be repeated here.

[0117] Further, the server continues in a similar manner to the aforementioned embodiments, calculating the second mechanical deviation between the expected value of the mechanical model response characteristics and the adjusted mechanical model response characteristic curve, and calculating the second electromagnetic field deviation between the expected value of the electromagnetic field model response characteristics and the adjusted electromagnetic field model response characteristic curve. It then determines whether the second mechanical deviation is less than a mechanical deviation threshold and whether the second electromagnetic field deviation is less than an electromagnetic field deviation threshold. If both are true, step 406 is executed; otherwise, step 402 is executed.

[0118] Step 406: If the second mechanical deviation between the expected value of the mechanical model response characteristics and the adjusted mechanical model response characteristic curve is less than the mechanical deviation threshold, and the second electromagnetic field deviation between the expected value of the electromagnetic field model response characteristics and the adjusted electromagnetic field model response characteristic curve is less than the electromagnetic field deviation threshold, then the target information of the target DC dry bushing is determined based on the adjusted initial information.

[0119] Since the second mechanical deviation is less than the mechanical deviation threshold and the second electromagnetic field deviation is less than the electromagnetic field deviation threshold, it indicates that the deviations of the response characteristic curves simulated based on the adjusted initial information from the expected values ​​in both the mechanical and electromagnetic dimensions meet the requirements. Therefore, the server can determine the target information of the target DC dry bushing based on the adjusted initial information.

[0120] In practical applications, to ensure the reliability of the target DC dry bushing, it is also necessary to determine whether the response characteristic curves remain consistent in terms of their initial state, turning point, trend, and deviation. Specifically, after the server acquires the mechanical model response characteristic curve and the electromagnetic field model response characteristic curve of the target information based on the target information, if the target information meets the design requirements, then the response characteristic curves of the mechanical process of matching the target hollow composite insulator and the target DC dry bushing core, the mechanical process of matching the target hollow composite insulator, and the mechanical process of matching the target DC dry bushing core should all maintain consistency in terms of their initial state, turning point, trend, and deviation.

[0121] Similarly, the electromagnetic field response characteristic curves of the target hollow composite insulator and the target DC dry bushing core, the electromagnetic field response characteristic curve of the target hollow composite insulator, and the electromagnetic field response characteristic curve of the target DC dry bushing core should be consistent in terms of initiation, turning point, trend, and deviation. If they are inconsistent, further adjustments need to be made to the determined target material, target process, and target structural parameters until the aforementioned requirements are met.

[0122] In this embodiment, when the deviation between the mechanical dimension and the expected value is large, the initial information is adjusted. After the initial information is adjusted, the deviation between the response characteristic curve and the expected value is considered again from both the electromagnetic field and mechanical dimensions. This further ensures that the determined target information is closer to the actual design requirements of the target DC dry bushing, thereby improving the reliability and feasibility of the determined target information.

[0123] In one embodiment, such as Figure 5 As shown, step 110 involves optimizing and adjusting the initial information based on the first mechanical deviation and the first electromagnetic field deviation to determine the target information of the target DC dry bushing, including:

[0124] Step 502: If the first electromagnetic field deviation is greater than the electromagnetic field deviation threshold, then the initial information is optimized and adjusted.

[0125] based on Figure 3 In the embodiment shown, if the obtained first electromagnetic field deviation is greater than the electromagnetic field deviation threshold, it indicates that the initial prior design scheme or initial material properties in the initial information do not meet the design requirements, resulting in a large deviation between the simulated response characteristic curve and the expected value in the electromagnetic dimension. Therefore, the initial prior design scheme or initial material properties in the initial information are optimized and adjusted.

[0126] Step 504: Based on the adjusted initial information, obtain the adjusted electromagnetic field model response characteristic curve and the adjusted electromagnetic field model response characteristic curve.

[0127] The server uses the adjusted initial information as input to the target parameterized model, and then sets the solution conditions for the electromagnetic and mechanical performance response function of the target DC dry bushing. Thus, based on the adjusted initial information and the solution conditions for the electromagnetic and mechanical performance response function, the server can obtain the adjusted mechanical model response curve and the adjusted electromagnetic field model response curve. The method for obtaining the response curves is similar to the aforementioned embodiments and will not be repeated here.

[0128] Further, the server continues in a similar manner to the aforementioned embodiments, calculating the second mechanical deviation between the expected value of the mechanical model response characteristics and the adjusted mechanical model response characteristic curve, and calculating the second electromagnetic field deviation between the expected value of the electromagnetic field model response characteristics and the adjusted electromagnetic field model response characteristic curve. It then determines whether the second mechanical deviation is less than a mechanical deviation threshold and whether the second electromagnetic field deviation is less than an electromagnetic field deviation threshold. If both are true, step 506 is executed; otherwise, step 502 is executed.

[0129] Step 506: If the second electromagnetic field deviation between the expected value of the electromagnetic field model response characteristics and the adjusted electromagnetic field model response characteristics curve is less than the electromagnetic field deviation threshold, and the second mechanical deviation between the expected value of the mechanical model response characteristics and the adjusted mechanical model response characteristics curve is less than the mechanical deviation threshold, then the target information of the target DC dry bushing is determined based on the adjusted initial information.

[0130] Since the second electromagnetic field deviation is less than the electromagnetic field deviation threshold, and this indicates that the deviations of the response characteristic curve simulated based on the adjusted initial information from the expected values ​​in both the electromagnetic field and electromagnetic dimensions meet the requirements, the server can determine the target information of the target DC dry bushing based on the adjusted initial information.

[0131] In practical applications, to ensure the reliability of the target DC dry bushing, it is also necessary to determine whether the response characteristic curves are consistent in terms of their initial state, turning point, trend, and deviation. Specifically, after the server acquires the mechanical model response characteristic curve and the electromagnetic field model response characteristic curve of the target information based on the target information, if the target information meets the design requirements, then the electromagnetic field matching process response characteristic curves of the target hollow composite insulator and the target DC dry bushing core should be consistent in terms of their initial state, turning point, trend, and deviation.

[0132] Similarly, the mechanical response characteristic curves of the target hollow composite insulator and the target DC dry bushing core matching process, the mechanical response characteristic curve of the target hollow composite insulator matching process, and the mechanical response characteristic curve of the target DC dry bushing core matching process should be consistent in terms of initiation, turning point, trend, and deviation. If they are inconsistent, further adjustments need to be made to the determined target material, target process, and target structural parameters until the aforementioned requirements are met.

[0133] In this embodiment, when the deviation between the electromagnetic dimension and the expected value is large, the initial information is adjusted. After the initial information is adjusted, the deviation between the response characteristic curve and the expected value is considered again from both electromagnetic field and mechanical dimensions. This further ensures that the determined target information is closer to the actual design requirements of the target DC dry bushing, thereby improving the reliability and feasibility of the determined target information.

[0134] It should be understood that the above embodiments describe embodiments where neither the expected value of the mechanical model response characteristics nor the expected value of the electromagnetic field model response characteristics can be met. If the response characteristic curve obtained from the initial information can meet the expected values ​​of both the mechanical model response characteristics and the electromagnetic field model response characteristics, the target information of the target DC dry bushing can be directly determined without the aforementioned adjustment steps. However, the response characteristic curve obtained during the verification simulation of the target information should also maintain consistency in its start, turning point, trend, and deviation; otherwise, adjustments are required.

[0135] In one embodiment, such as Figure 6 As shown, the target DC dry bushing is composed of a target hollow composite insulator and a target DC dry bushing core. Based on this, step 102 selects the initial information of the target DC dry bushing, including:

[0136] Step 602: Select the first initial sub-information of the target hollow composite insulator and the second initial sub-information of the target DC dry bushing core. The first initial sub-information includes the initial prior design scheme, initial material properties and initial load curve of the target hollow composite insulator. The second initial sub-information includes the initial prior design scheme, initial material properties and initial load curve of the target DC dry bushing core.

[0137] Since the target DC dry bushing is composed of a target hollow composite insulator and a target DC dry bushing core, the server needs to select the initial information of the target DC dry bushing, specifically the first initial sub-information of the target hollow composite insulator, and the first initial sub-information of the target hollow composite insulator.

[0138] Specifically, the first initial sub-information includes the initial a priori design scheme, initial material properties, and initial load curve of the target hollow composite insulator, and the second initial sub-information includes the initial a priori design scheme, initial material properties, and initial load curve of the target DC dry bushing core.

[0139] Step 604: Generate initial information based on the first initial sub-information and the second initial sub-information.

[0140] The server generates initial information based on the first initial sub-information of the target hollow composite insulator and the second initial sub-information of the target DC dry bushing core. It should be understood that the initial information also includes the initial a priori design scheme, initial material properties, and initial load curve of the target DC dry bushing from an overall perspective. Furthermore, in practical applications, the target DC dry bushing requires other components, so the initial information may also include the initial information of other components, which is not limited here.

[0141] Furthermore, the target information determined in step 110 specifically includes the target material, target process, and target structural parameters of the target hollow composite insulator, as well as the target material, target process, and target structural parameters of the target DC dry bushing core. It should be understood that the target DC dry bushing also requires other components; therefore, the target information may also include the materials, processes, and structural parameters of other components, which are not limited here.

[0142] In this embodiment, based on the target hollow composite insulator and the target DC dry bushing core, which are the main components of the target DC dry bushing, the initial information of the target hollow composite insulator and the target DC dry bushing core is selected to form the initial information of the target DC dry bushing. This ensures the integrity of the initial information, and therefore the obtained target information is more complete and accurate.

[0143] The following will describe the general method for determining parameter information, such as... Figure 7 As shown, it includes the following steps:

[0144] Step 702: Select the initial information of the target DC dry bushing.

[0145] The target DC dry bushing is composed of a target hollow composite insulator and a target DC dry bushing core. The external insulation of the target DC dry bushing refers to the target hollow composite insulator, while the internal insulation refers to the target DC dry bushing core.

[0146] Specifically, the server selects the initial a priori design scheme, initial material properties, and initial load curve of the target DC dry bushing, the initial a priori design scheme, initial material properties, and initial load curve of the target hollow composite insulator, and the initial a priori design scheme, initial material properties, and initial load curve of the target DC dry bushing core.

[0147] Step 704: Determine the expected values ​​of the response characteristics of the mechanical model and the electromagnetic field model.

[0148] The server can also determine the expected values ​​of the mechanical model response characteristics and the electromagnetic field model response characteristics of the target DC dry bushing based on the specific design requirements. Specifically, the expected values ​​of the mechanical model response characteristics include the maximum displacement and allowable stress, while the expected values ​​of the electromagnetic field model response characteristics include the allowable field strength. Furthermore, in practical applications, the server needs to determine the expected values ​​of the mechanical model response characteristics and the electromagnetic field model response characteristics of the target DC dry bushing under all operating conditions, including wind load, self-weight, tensile force, and overvoltage, based on the specific design requirements, to ensure that the determined expected values ​​fully consider all external influences encountered during actual operation.

[0149] Step 706: Select the electromagnetic performance response characteristic function and the mechanical performance response characteristic function.

[0150] The server selects electromagnetic performance response characteristic function and mechanical performance response characteristic function based on the specific design requirements of the target DC dry bushing.

[0151] Step 708: Construct a parameterized model of the target DC dry bushing under mechanical and electromagnetic forces during operation.

[0152] The server can also construct a parameterized model of the target DC dry bushing under mechanical and electromagnetic forces during operation, based on the specific design requirements of the target DC dry bushing. Since the target DC dry bushing is composed of a target hollow composite insulator and a target DC dry bushing core, the target parameterized model is specifically a parameterized model of the target hollow composite insulator and the target DC dry bushing core under mechanical and electromagnetic forces during operation.

[0153] Step 710: Under full operating conditions, the initial information is used as the input to the target parameterized model so that the target parameterized model outputs the mechanical model response characteristic curve and the electromagnetic field model response characteristic curve based on the electromagnetic performance response characteristic function and the mechanical performance response characteristic function. Full operating conditions represent all external influences experienced by the target DC dry bushing during operation.

[0154] The server sets the initial a priori design scheme, initial material properties, and initial load curve of the target DC dry bushing as input conditions for the target parametric model. Then, it sets the solution conditions for the electromagnetic performance response characteristic function and the mechanical performance response characteristic function of the target DC dry bushing. Thus, based on the initial a priori design scheme, initial material properties, and initial load curve of the target DC dry bushing, the server can obtain the mechanical model response characteristic curve and the electromagnetic field model response characteristic curve through the solution conditions of the electromagnetic performance response characteristic function and the mechanical performance response characteristic function.

[0155] Step 712: Calculate the first amplitude difference between the maximum displacement and the simulated displacement, and calculate the second amplitude difference between the allowable stress and the simulated stress. The first mechanical deviation includes the first amplitude difference and the second amplitude difference.

[0156] The performance of the mechanical model's response characteristic curve includes the simulated displacement and simulated stress output during the simulation, while the expected value of the mechanical model's response characteristic includes the maximum displacement and allowable stress. Based on this, the server actually needs to calculate the first amplitude difference between the maximum displacement and the simulated displacement. This first amplitude difference describes the deviation between the mechanical model's response characteristic curve and the expected value of the mechanical model's response characteristic in the displacement dimension. Similarly, the server also needs to calculate the second amplitude difference between the allowable stress and the simulated stress. This second amplitude difference describes the deviation between the mechanical model's response characteristic curve and the expected value of the mechanical model's response characteristic in the stress dimension.

[0157] Step 714: Calculate the third amplitude difference between the allowable field strength and the simulated field strength. The first electromagnetic field deviation is the third amplitude difference.

[0158] The performance of the electromagnetic field model response characteristic curve includes the simulated field strength output during simulation, while the expected value of the electromagnetic field model response characteristic includes the allowable field strength. Based on this, the server actually needs to calculate a third amplitude difference between the allowable field strength and the simulated field strength. This third amplitude difference describes the deviation between the electromagnetic field model response characteristic curve and the expected value of the electromagnetic field model response characteristic in the electromagnetic field dimension. Therefore, the server defines this third amplitude difference as the first electromagnetic field deviation, meaning the first electromagnetic field deviation describes the deviation between the electromagnetic field model response characteristic curve and the expected value of the electromagnetic field model response characteristic in the electromagnetic field dimension.

[0159] Step 716: Based on the first mechanical deviation and the first electromagnetic field deviation, optimize and adjust the initial information to determine the target information of the target DC dry bushing.

[0160] The server optimizes and adjusts the initial information based on the first mechanical deviation and the first electromagnetic field deviation, and uses the expected values ​​of the mechanical model response characteristics and the expected values ​​of the electromagnetic field model response characteristics as optimization targets. Based on the optimization and adjustment results, the server outputs the target information of the determined target DC dry bushing.

[0161] Specifically, the target information includes the target material, target process, and target structural parameters of the target DC dry bushing, the target material, target process, and target structural parameters of the target hollow composite insulator, and the target material, target process, and target structural parameters of the target DC dry bushing core.

[0162] It is understandable that the specific implementation methods of steps 702 to 716 are as follows: Figures 1 to 6 The corresponding embodiments are described in detail, so they will not be repeated hereafter.

[0163] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0164] Based on the same inventive concept, this application also provides a device for designing the mechanical strength matching of the internal and external insulation of a DC dry bushing, which is used to implement the above-mentioned design method for the mechanical strength matching of the internal and external insulation of a DC dry bushing. The solution provided by this device is similar to the solution described in the above method. Therefore, the specific limitations of one or more embodiments of the device for designing the mechanical strength matching of the internal and external insulation of a DC dry bushing provided below can be found in the limitations of the design method for the mechanical strength matching of the internal and external insulation of a DC dry bushing described above, and will not be repeated here.

[0165] In one embodiment, such as Figure 8 As shown, a device for designing the mechanical strength matching of internal and external insulation of a DC dry bushing is provided, comprising: a selection module 802, a determination module 804, an acquisition module 806, and a calculation module 808, wherein:

[0166] Selection module 802 is used to select the initial information of the target DC dry bushing. The initial information includes the initial prior design scheme, initial material properties and initial load curve of the target DC dry bushing.

[0167] Module 804 is used to determine the expected values ​​of the response characteristics of the mechanical model and the expected values ​​of the response characteristics of the electromagnetic field model.

[0168] The acquisition module 806 is used to acquire the response characteristic curves of the mechanical model and the electromagnetic field model based on the initial information.

[0169] The calculation module 808 is used to calculate the first mechanical deviation between the expected value of the mechanical model response characteristics and the mechanical model response characteristic curve, and to calculate the first electromagnetic field deviation between the expected value of the electromagnetic field model response characteristics and the electromagnetic field model response characteristic curve.

[0170] The determination module 804 is also used to optimize and adjust the initial information based on the first mechanical deviation and the first electromagnetic field deviation in order to determine the target information of the target DC dry bushing. The target information includes the target material, target process and target structural parameters.

[0171] In one embodiment, the selection module 802 is further configured to select electromagnetic performance response characteristic function and mechanical performance response characteristic function; and to construct a target parameterized model of the target DC dry bushing under mechanical and electromagnetic effects during operation;

[0172] The acquisition module 806 is specifically used to take the initial information as the input of the target parameterized model under all operating conditions, so that the target parameterized model can output the mechanical model response characteristic curve and the electromagnetic field model response characteristic curve according to the electromagnetic performance response characteristic function and the mechanical performance response characteristic function. The full operating conditions are all the external influences that the target DC dry bushing is subjected to during operation.

[0173] In one embodiment, the expected value of the mechanical model response characteristics includes the maximum displacement and the allowable stress, and the expected value of the electromagnetic field model response characteristics includes the allowable field strength.

[0174] The calculation module 808 is specifically used to calculate the first amplitude difference between the maximum displacement and the simulated displacement, and to calculate the second amplitude difference between the allowable stress and the simulated stress. The first mechanical deviation includes the first amplitude difference and the second amplitude difference. It also calculates the third amplitude difference between the allowable field strength and the simulated field strength. The first electromagnetic field deviation is the third amplitude difference.

[0175] In one embodiment, the determining module 804 is specifically used to optimize and adjust the initial information if the first mechanical deviation is greater than the mechanical deviation threshold; and to obtain the adjusted mechanical model response characteristic curve and the adjusted electromagnetic field model response characteristic curve based on the adjusted initial information; if the second mechanical deviation between the expected value of the mechanical model response characteristic and the adjusted mechanical model response characteristic curve is less than the mechanical deviation threshold, and the second electromagnetic field deviation between the expected value of the electromagnetic field model response characteristic and the adjusted electromagnetic field model response characteristic curve is less than the electromagnetic field deviation threshold, then the target information of the target DC dry bushing is determined based on the adjusted initial information.

[0176] In one embodiment, the determining module 804 is specifically used to optimize and adjust the initial information if the first electromagnetic field deviation is greater than the electromagnetic field deviation threshold; and to obtain the adjusted electromagnetic field model response characteristic curve and the adjusted electromagnetic field model response characteristic curve based on the adjusted initial information; if the second electromagnetic field deviation between the expected value of the electromagnetic field model response characteristic and the adjusted electromagnetic field model response characteristic curve is less than the electromagnetic field deviation threshold, and the second mechanical deviation between the expected value of the mechanical model response characteristic and the adjusted mechanical model response characteristic curve is less than the mechanical deviation threshold, then the target information of the target DC dry bushing is determined based on the adjusted initial information.

[0177] In one embodiment, the target DC dry bushing is composed of a target hollow composite insulator and a target DC dry bushing core.

[0178] The selection module 802 is specifically used to select the first initial sub-information of the target hollow composite insulator and the second initial sub-information of the target DC dry bushing core. The first initial sub-information includes the initial prior design scheme, initial material properties, and initial load curve of the target hollow composite insulator. The second initial sub-information includes the initial prior design scheme, initial material properties, and initial load curve of the target DC dry bushing core. Initial information is generated based on the first and second initial sub-information.

[0179] Specifically, the target information includes the target material, target process, and target structural parameters of the target hollow composite insulator, as well as the target material, target process, and target structural parameters of the target DC dry bushing core.

[0180] The modules in the aforementioned design device for the mechanical strength matching of internal and external insulation of DC dry bushings can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0181] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 9As shown, the computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database stores parameter information. The network interface communicates with external terminals via a network connection. When executed by the processor, the computer program implements a method for designing the mechanical strength fit of the internal and external insulation of a DC dry bushing.

[0182] Those skilled in the art will understand that Figure 9 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0183] In one embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0184] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0185] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0186] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0187] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0188] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for designing the mechanical strength matching of internal and external insulation of a DC dry bushing, characterized in that, The method includes: Select the initial information of the target DC dry bushing, the initial information including the initial prior design scheme, initial material properties and initial load curve of the target DC dry bushing; Determine the expected values ​​of the response characteristics of the mechanical model and the electromagnetic field model; Based on the initial information, obtain the response characteristic curves of the mechanical model and the electromagnetic field model; Calculate the first mechanical deviation between the expected value of the response characteristics of the mechanical model and the response characteristic curve of the mechanical model, and calculate the first electromagnetic field deviation between the expected value of the response characteristics of the electromagnetic field model and the response characteristic curve of the electromagnetic field model; Based on the first mechanical deviation and the first electromagnetic field deviation, the initial information is optimized and adjusted to determine the target information of the target DC dry bushing. The target information includes the target material, target process, and target structural parameters.

2. The method according to claim 1, characterized in that, The method further includes: Select electromagnetic performance response characteristic function and mechanical performance response characteristic function; Construct a parameterized model of the target DC dry bushing under mechanical and electromagnetic forces during operation; The step of obtaining the mechanical model response characteristic curve and the electromagnetic field model response characteristic curve based on the initial information includes: Under full operating conditions, the initial information is used as the input to the target parameterized model, so that the target parameterized model outputs the mechanical model response characteristic curve and the electromagnetic field model response characteristic curve according to the electromagnetic performance response characteristic function and the mechanical performance response characteristic function. The full operating conditions refer to all external influences experienced by the target DC dry bushing during operation.

3. The method according to claim 1, characterized in that, The expected values ​​of the mechanical model response characteristics include the maximum displacement and allowable stress, and the expected values ​​of the electromagnetic field model response characteristics include the allowable field strength. The calculation of the first mechanical deviation between the expected value of the mechanical model response characteristics and the mechanical model response characteristic curve, and the calculation of the first electromagnetic field deviation between the expected value of the electromagnetic field model response characteristics and the electromagnetic field model response characteristic curve, include: Calculate the first amplitude difference between the maximum displacement and the simulated displacement, and calculate the second amplitude difference between the allowable stress and the simulated stress. The first mechanical deviation includes the first amplitude difference and the second amplitude difference. Calculate the third amplitude difference between the allowable field strength and the simulated field strength, where the first electromagnetic field deviation is the third amplitude difference.

4. The method according to claim 3, characterized in that, The step of optimizing and adjusting the initial information based on the first mechanical deviation and the first electromagnetic field deviation to determine the target information of the target DC dry bushing includes: If the first mechanical deviation is greater than the mechanical deviation threshold, then the initial information is optimized and adjusted. Based on the adjusted initial information, the adjusted mechanical model response characteristic curve and the adjusted electromagnetic field model response characteristic curve are obtained. If the second mechanical deviation between the expected value of the mechanical model response characteristics and the adjusted mechanical model response characteristic curve is less than the mechanical deviation threshold, and the second electromagnetic field deviation between the expected value of the electromagnetic field model response characteristics and the adjusted electromagnetic field model response characteristic curve is less than the electromagnetic field deviation threshold, then the target information of the target DC dry bushing is determined based on the adjusted initial information.

5. The method according to claim 3, characterized in that, The step of optimizing and adjusting the initial information based on the first electromagnetic field deviation to determine the target information of the target DC dry bushing includes: If the first electromagnetic field deviation is greater than the electromagnetic field deviation threshold, then the initial information is optimized and adjusted. Based on the adjusted initial information, the adjusted electromagnetic field model response characteristic curve is obtained; If the second electromagnetic field deviation between the expected value of the electromagnetic field model response characteristic and the adjusted electromagnetic field model response characteristic curve is less than the electromagnetic field deviation threshold, and the second mechanical deviation between the expected value of the mechanical model response characteristic and the adjusted mechanical model response characteristic curve is less than the mechanical deviation threshold, then the target information of the target DC dry bushing is determined based on the adjusted initial information.

6. The method according to claim 1, characterized in that, The target DC dry bushing is composed of a target hollow composite insulator and a target DC dry bushing core. The initial information for selecting the target DC dry bushing includes: Select the first initial sub-information of the target hollow composite insulator and the second initial sub-information of the target DC dry bushing core. The first initial sub-information includes the initial a priori design scheme, initial material properties and initial load curve of the target hollow composite insulator. The second initial sub-information includes the initial a priori design scheme, initial material properties and initial load curve of the target DC dry bushing core. The initial information is generated based on the first initial sub-information and the second initial sub-information; Specifically, the target information includes the target material, target process, and target structural parameters of the target hollow composite insulator, as well as the target material, target process, and target structural parameters of the target DC dry bushing core.

7. A design device for matching the internal and external insulation mechanical strength of a DC dry bushing, characterized in that, The device includes: The selection module is used to select the initial information of the target DC dry bushing. The initial information includes the initial prior design scheme, initial material properties, and initial load curve of the target DC dry bushing. The determination module is used to determine the expected values ​​of the response characteristics of the mechanical model and the electromagnetic field model. The acquisition module is used to acquire the response characteristic curves of the mechanical model and the electromagnetic field model based on the initial information. The calculation module is used to calculate the first mechanical deviation between the expected value of the response characteristics of the mechanical model and the response characteristic curve of the mechanical model, and to calculate the first electromagnetic field deviation between the expected value of the response characteristics of the electromagnetic field model and the response characteristic curve of the electromagnetic field model. The determining module is further configured to optimize and adjust the initial information based on the first mechanical deviation and the first electromagnetic field deviation, so as to determine the target information of the target DC dry bushing, wherein the target information includes the target material, the target process, and the target structural parameters.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

Images