A safety assessment method and system for a supported tubular busbar structure

Abstract

The present invention discloses a safety assessment method and system for a supported tubular busbar structure, and relates to the technical field of power system safety assessment. The method comprises: obtaining a finite element model of a supported tubular busbar structure; simulating the foundation settlement of the supported tubular busbar structure based on the finite element model to obtain several simulated settlement models; increasing the simulated settlement of the supported tubular busbar structure step by step based on the simulated settlement model to obtain a stress-settlement rate relationship curve of a support insulator; obtaining an actual settlement model of the supported tubular busbar structure to obtain the actual settlement of the supported tubular busbar structure; judging whether the supported tubular busbar structure has failed according to the stress-settlement rate relationship curve of the support insulator and the actual settlement. The present invention analyzes the relationship between the stress and settlement rate of the support insulator in the supported tubular busbar structure through a finite element model, and can quickly judge whether the supported tubular busbar structure has failed.

Description

Technical Field

[0001] The invention relates to the technical field of power system safety assessment, and in particular to a safety assessment method for a supported tubular busbar structure. Background Art

[0002] Geological disasters are one of the main natural disasters that threaten the safe operation of power systems. Substations are an important part of the power lifeline project. Once they fail or are damaged, they will seriously affect normal production and life, and may cause serious secondary disasters, causing great difficulties for disaster relief work. The demand for electricity in industrial and agricultural production and residents' lives is increasing, and a large number of new substations need to be built. Many substations are inevitably located in areas with poor soil conditions.

[0003] The existing substation foundation settlement assessment method only analyzes the deformation of the foundation soil, and does not consider the impact of foundation settlement on substation equipment. Therefore, in view of the damage of the power system caused by foundation settlement, the safety of the tubular busbar structure in foundation settlement should be comprehensively considered. Summary of the invention

[0004] The purpose of the present invention is to provide a safety assessment method and system for a supported tubular busbar structure, which comprehensively considers the safety of the tubular busbar structure under foundation settlement in view of the disaster situation of the power system when foundation settlement occurs.

[0005] To achieve the above object, the present invention provides a safety assessment method for a supported tubular busbar structure, comprising:

[0006] Obtaining a finite element model of a supported tubular busbar structure; wherein the supported tubular busbar structure comprises a support insulator, a bracket and a tubular busbar;

[0007] Based on the finite element model, a foundation settlement simulation is performed on the supported tubular busbar structure to obtain several simulated settlement models;

[0008] Based on the simulated settlement model, the simulated settlement amount of the supported tubular busbar structure is gradually increased to obtain a stress-settlement rate relationship curve of the support insulator;

[0009] Obtaining an actual settlement model of the supported tubular busbar structure and obtaining an actual settlement amount of the supported tubular busbar structure;

[0010] Whether the supported tubular busbar structure fails is determined based on the post insulator stress-settlement rate relationship curve and the actual settlement amount.

[0011] Preferably, the post insulators, brackets and tubular busbars are simulated using beam units.

[0012] Preferably, the supported tubular busbar structure further comprises an insulator, and the insulator adopts a linear elastic material model.

[0013] Preferably, the supported tubular busbar structure further comprises a steel bracket and an aluminum tube, and the steel bracket and the aluminum tube adopt a bilinear isotropic material model.

[0014] Preferably, the settlement model includes a first settlement model with an initial settlement of 0 and an end settlement of d, a second settlement model with an initial settlement of d and an end settlement of 0, a third settlement model with an intermediate settlement of d and an end settlement of 0, and a fourth settlement model with an intermediate settlement of 0 and an end settlement of d.

[0015] The present invention also provides a safety assessment system for a supported tubular busbar structure, comprising:

[0016] A finite element model acquisition module is used to acquire a finite element model of a supported tubular busbar structure; wherein the supported tubular busbar structure includes a support insulator, a bracket and a tubular busbar;

[0017] A foundation settlement simulation module, used for performing foundation settlement simulation on the supported tubular busbar structure based on the finite element model to obtain several simulated settlement models;

[0018] An insulator stress analysis module, used to gradually increase the simulated settlement amount of the supported tubular busbar structure based on the simulated settlement model to obtain a post insulator stress-settlement rate relationship curve;

[0019] An actual settlement model acquisition module is used to acquire an actual settlement model of the supported tubular busbar structure and obtain an actual settlement amount of the supported tubular busbar structure;

[0020] The structural failure analysis module is used to determine whether the supported tubular busbar structure has failed based on the support insulator stress-settlement rate relationship curve and the actual settlement amount.

[0021] Preferably, the supported tubular busbar structure also includes insulators, and the insulators adopt a linear elastic material model; the supported tubular busbar structure also includes a steel bracket and an aluminum tube, and the steel bracket and the aluminum tube adopt a bilinear isotropic material model; the support insulators, brackets and tubular busbars are simulated using beam units.

[0022] Preferably, the settlement model includes a first settlement model with an initial settlement of 0 and an end settlement of d, a second settlement model with an initial settlement of d and an end settlement of 0, a third settlement model with an intermediate settlement of d and an end settlement of 0, and a fourth settlement model with an intermediate settlement of 0 and an end settlement of d.

[0023] The present invention also provides a computer terminal device, comprising one or more processors and a memory. The memory is coupled to the processor and is used to store one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the safety assessment method of the supported tubular busbar structure as described in any of the above embodiments.

[0024] The present invention also provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the safety assessment method for a supported tubular busbar structure as described in any of the above embodiments is implemented.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The safety assessment method of the supported tubular busbar structure disclosed in the present invention comprises: obtaining a finite element model of the supported tubular busbar structure; wherein the supported tubular busbar structure comprises a support insulator, a bracket and a tubular busbar; simulating the foundation settlement of the supported tubular busbar structure based on the finite element model to obtain several simulated settlement models; increasing the simulated settlement of the supported tubular busbar structure step by step based on the simulated settlement model to obtain a stress-settlement rate relationship curve of the support insulator; obtaining an actual settlement model of the supported tubular busbar structure to obtain the actual settlement of the supported tubular busbar structure; judging whether the supported tubular busbar structure has failed according to the stress-settlement rate relationship curve of the support insulator and the actual settlement. The present invention analyzes the relationship between the stress and settlement rate of the support insulator in the supported tubular busbar structure through a finite element model, and can quickly judge whether the supported tubular busbar structure has failed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic flow chart of a safety assessment method for a supported tubular busbar structure provided by a certain embodiment of the present invention;

[0029] Figure 2 It is a side view of the supported tubular busbar structure;

[0030] Figure 3 It is one of the four common modes of foundation settlement;

[0031] Figure 4 It is the second of the four common foundation settlement modes;

[0032] Figure 5 It is the third of the four common foundation settlement modes;

[0033] Figure 6 It is one of the four common foundation settlement modes;

[0034] Figure 7 It is a structural schematic diagram of a safety assessment system for a supported tubular busbar structure provided by a certain embodiment of the present invention;

[0035] Figure 8 It is a schematic diagram of the structure of a computer terminal device provided by a certain embodiment of the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be understood that the step numbers used in this article are only for the convenience of description and are not intended to limit the order in which the steps are executed.

[0038] It should be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0039] The terms “include” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0040] The term "and / or" means and includes any and all possible combinations of one or more of the associated listed items.

[0041] See also Figure 1 , Figure 1 1 is a flow chart of a safety assessment method for a supported tubular busbar structure provided by a certain embodiment of the present invention. The safety assessment method for a supported tubular busbar structure provided by this embodiment comprises the following steps:

[0042] S110, obtaining a finite element model of a supported tubular busbar structure; wherein the supported tubular busbar structure includes a support insulator, a bracket and a tubular busbar.

[0043] It can be understood that for an n-span supported tubular busbar structure (such as Figure 2 As shown in Figure 2, a finite element model can be established using general finite element software. For reference, when establishing a finite element model, the support insulators, steel brackets and tubular busbars in the supported tubular busbar structure are simulated using beam units, the insulators use a linear elastic material model, and the steel brackets and aluminum tubes use a bilinear isotropic material model.

[0044] S120, performing foundation settlement simulation on the supported tubular busbar structure based on the finite element model to obtain several simulated settlement models.

[0045] According to the actual foundation settlement, four common foundation settlement modes need to be considered: the first settlement model with a starting settlement of 0 and a final settlement of d (such as Figure 3 As shown in the figure), the second settlement model with a starting settlement of d and a final settlement of 0 (as shown in the figure Figure 4 As shown in the figure), the third settlement model with the middle settlement amount d and the settlement amount at both ends 0 (as shown in the figure Figure 5 As shown), and the fourth settlement model with a middle settlement of 0 and two end settlements of d (as shown Figure 6 shown).

[0046] S130, based on the simulated settlement model, gradually increasing the simulated settlement of the supported tubular busbar structure to obtain a stress-settlement rate relationship curve of the support insulator.

[0047] As an example, for four common foundation settlement modes, structural mechanics analysis is carried out respectively, the settlement amount is gradually increased, and the stress value σ of each post insulator is recorded. 1 ,σ 2 ,…,σ n+1 , and obtain the stress-settlement rate (d / L) relationship curve of each post insulator.

[0048] S140, obtaining an actual settlement model of the supported tubular busbar structure, and obtaining an actual settlement amount of the supported tubular busbar structure.

[0049] As an example, the first strength criterion is used to judge the safety of the post insulator. When the stress value of each post insulator reaches the material limit value [σ], the post insulator is judged to be failed. According to the post insulator stress-settlement rate curve, the settlement rate corresponding to the stress limit value of the post insulator under four settlement modes is determined, which is called the limit settlement rate.

[0050] S150, judging whether the supported tubular busbar structure fails according to the post insulator stress-settlement rate relationship curve and the actual settlement amount.

[0051] It can be understood that for the supported tubular busbar structure, the settlement mode is first determined according to the settlement conditions, and the actual settlement rate is compared with the limit settlement rate under the settlement mode. When the actual settlement rate is less than the limit settlement rate, the structure is safe; otherwise, the structure fails.

[0052] See also Figure 7 , Figure 7 1 is a schematic diagram of a safety assessment system for a supported tubular busbar structure provided by a certain embodiment of the present invention. In this embodiment, the safety assessment system for a supported tubular busbar structure includes:

[0053] The finite element model acquisition module 210 is used to acquire a finite element model of a supported tubular busbar structure; wherein the supported tubular busbar structure includes a support insulator, a bracket and a tubular busbar.

[0054] It can be understood that for an n-span supported tubular busbar structure (such as Figure 2 As shown in Figure 2, a finite element model can be established using general finite element software. For reference, when establishing a finite element model, the support insulators, steel brackets and tubular busbars in the supported tubular busbar structure are simulated using beam units, the insulators use a linear elastic material model, and the steel brackets and aluminum tubes use a bilinear isotropic material model.

[0055] The foundation settlement simulation module 220 is used to simulate the foundation settlement of the supported tubular busbar structure based on the finite element model to obtain several simulated settlement models.

[0056] According to the actual foundation settlement, four common foundation settlement modes need to be considered: the first settlement model with a starting settlement of 0 and a final settlement of d (such as Figure 3 As shown in the figure), the second settlement model with a starting settlement of d and a final settlement of 0 (as shown in the figure Figure 4 As shown in the figure), the third settlement model with the middle settlement amount d and the settlement amount at both ends 0 (as shown in the figure Figure 5 As shown), and the third settlement model with a settlement of 0 in the middle and settlement of d at both ends (as shown Figure 6 shown).

[0057] The insulator stress analysis module 230 is used to gradually increase the simulated settlement of the supported tubular busbar structure based on the simulated settlement model to obtain a post insulator stress-settlement rate relationship curve.

[0058] As an example, for four common foundation settlement modes, structural mechanics analysis is carried out respectively, the settlement amount is gradually increased, and the stress value σ of each post insulator is recorded. 1 ,σ 2 ,…,σ n+1, and obtain the stress-settlement rate (d / L) relationship curve of each post insulator.

[0059] The actual settlement model acquisition module 240 is used to acquire the actual settlement model of the supported tubular busbar structure and obtain the actual settlement amount of the supported tubular busbar structure.

[0060] As an example, the first strength criterion is used to judge the safety of the post insulator. When the stress value of each post insulator reaches the material limit value [σ], the post insulator is judged to be failed. According to the post insulator stress-settlement rate curve, the settlement rate corresponding to the stress limit value of the post insulator under four settlement modes is determined, which is called the limit settlement rate.

[0061] The structural failure analysis module 250 is used to determine whether the supported tubular busbar structure has failed based on the post insulator stress-settlement rate relationship curve and the actual settlement amount.

[0062] It can be understood that for the supported tubular busbar structure, the settlement mode is first determined according to the settlement conditions, and the actual settlement rate is compared with the limit settlement rate under the settlement mode. When the actual settlement rate is less than the limit settlement rate, the structure is safe; otherwise, the structure fails.

[0063] See also Figure 8 An embodiment of the present invention provides a computer terminal device, comprising one or more processors and a memory. The memory is coupled to the processor and is used to store one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors implement the safety assessment method for the supported tubular busbar structure in any one of the above embodiments.

[0064] The processor is used to control the overall operation of the computer terminal device to complete all or part of the steps of the safety assessment method for the above-mentioned supported tubular busbar structure. The memory is used to store various types of data to support the operation of the computer terminal device, and these data may include, for example, instructions for any application or method used to operate on the computer terminal device, as well as application-related data. The memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0065] In an exemplary embodiment, the computer terminal device can be implemented by one or more application specific integrated circuits (Application Specific Integrated Circuit, ASC), digital signal processors (Digital Signal Processor, DSP), digital signal processing devices (Digital Signal Processing Device, DSPD), programmable logic devices (Programmable Logic Device, PLD), field programmable gate arrays (Field Programmable Gate Array, FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned safety assessment method for the supported tubular busbar structure and achieve the same technical effect as the above-mentioned method.

[0066] In another exemplary embodiment, a computer-readable storage medium including a computer program is also provided, and when the computer program is executed by a processor, the steps of the safety assessment method for a supported tubular busbar structure in any of the above embodiments are implemented. For example, the computer-readable storage medium may be the above-mentioned memory including the computer program, and the above-mentioned computer program may be executed by a processor of a computer terminal device to complete the above-mentioned safety assessment method for a supported tubular busbar structure, and achieve the technical effect consistent with the above-mentioned method.

[0067] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A safety assessment method for a supported tubular busbar structure. It is characterized in that include: Obtaining a finite element model of a supported tubular busbar structure; wherein the supported tubular busbar structure comprises a support insulator, a bracket and a tubular busbar; Based on the finite element model, the foundation settlement of the supported tubular busbar structure is simulated to obtain several simulated settlement models; the settlement models include a first settlement model with a starting settlement of 0 and a terminal settlement of d, a second settlement model with a starting settlement of d and a terminal settlement of 0, a third settlement model with a middle settlement of d and a settlement of 0 at both ends, and a fourth settlement model with a middle settlement of 0 and a settlement of d at both ends; Based on the simulated settlement model, the simulated settlement amount of the supported tubular busbar structure is gradually increased to obtain a stress-settlement rate relationship curve of the support insulator; Obtaining an actual settlement model of the supported tubular busbar structure and obtaining an actual settlement amount of the supported tubular busbar structure; Whether the supported tubular busbar structure fails is determined based on the post insulator stress-settlement rate relationship curve and the actual settlement amount.

2. The safety assessment method for a supported tubular busbar structure according to claim 1, It is characterized in that The support insulator, bracket and tubular busbar are simulated by beam units.

3. The safety assessment method for a supported tubular busbar structure according to claim 1, It is characterized in that The supported tubular busbar structure also includes an insulator, and the insulator adopts a linear elastic material model.

4. The safety assessment method for a supported tubular busbar structure according to claim 1, It is characterized in that The supported tubular busbar structure also includes a steel bracket and an aluminum tube, and the steel bracket and the aluminum tube adopt a bilinear isotropic material model.

5. A safety assessment system for supported tubular busbar structures, It is characterized in that include: A finite element model acquisition module is used to acquire a finite element model of a supported tubular busbar structure; wherein the supported tubular busbar structure includes a support insulator, a bracket and a tubular busbar; A foundation settlement simulation module is used to simulate the foundation settlement of the supported tubular busbar structure based on the finite element model to obtain several simulated settlement models; the settlement models include a first settlement model with a starting settlement of 0 and a terminal settlement of d, a second settlement model with a starting settlement of d and a terminal settlement of 0, a third settlement model with a middle settlement of d and a settlement of 0 at both ends, and a fourth settlement model with a middle settlement of 0 and a settlement of d at both ends; An insulator stress analysis module, used to gradually increase the simulated settlement amount of the supported tubular busbar structure based on the simulated settlement model to obtain a post insulator stress-settlement rate relationship curve; An actual settlement model acquisition module is used to acquire an actual settlement model of the supported tubular busbar structure and obtain an actual settlement amount of the supported tubular busbar structure; The structural failure analysis module is used to determine whether the supported tubular busbar structure has failed based on the stress-settlement rate relationship curve of the post insulator and the actual settlement amount.

6. The safety assessment system for the supported tubular busbar structure according to claim 5, It is characterized in that The supported tubular busbar structure also includes an insulator, and the insulator adopts a linear elastic material model; the supported tubular busbar structure also includes a steel bracket and an aluminum tube, and the steel bracket and the aluminum tube adopt a bilinear isotropic material model; the support insulator, bracket and tubular busbar are simulated using beam units.

7. A computer terminal device, It is characterized in that include: one or more processors; A memory, coupled to the processor, for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the safety assessment method for the supported tubular busbar structure as described in any one of claims 1 to 4.

8. A computer-readable storage medium having a computer program stored thereon, It is characterized in that When the computer program is executed by a processor, the safety assessment method for a supported tubular busbar structure according to any one of claims 1 to 4 is implemented.

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