Fluid mechanics simulation method and system for heat and humidity distribution of substation under high humidity environment

Abstract

This invention discloses a fluid dynamics simulation method and system for the heat and humidity distribution in substations under high humidity environments, belonging to the field of simulation technology. The method includes: establishing a physical model by creating a three-dimensional geometric model based on the substation's structure, equipment installation locations, and equipment dimensions; setting simulation parameters by acquiring airflow velocity, humidity, and temperature data from sensors as initial conditions for the simulation; constructing a numerical simulation model based on fluid dynamics to model the heat and humidity transfer within the substation; performing numerical simulation by inputting the physical model and simulation parameters into numerical simulation software; and analyzing the simulation results through post-processing. This invention, by combining numerical simulation and a physical model, can accurately calculate the temperature and humidity distribution characteristics in different areas within a substation, helping to promptly identify and resolve potential problems.

Description

Technical Field

[0001] This invention relates to the field of simulation technology, and in particular to a fluid dynamics simulation method and system for the heat and humidity distribution of substations under high humidity conditions. Background Technology

[0002] In high-humidity environments, uneven temperature and humidity distribution inside substations can lead to equipment malfunctions, such as condensation, which can affect the operation of substation equipment.

[0003] Specifically:

[0004] Corrosion equipment:

[0005] Inside the terminal box, condensation on the secondary terminal blocks can corrode the conductive metal parts. This corrosion can be exacerbated by the introduction of dust and other impurities, potentially leading to AC / DC short circuits and grounding. DC grounding poses a significant threat to the stable operation of the substation's secondary system.

[0006] Dew can also corrode the metal parts inside the operating mechanism of switches or knife switches, affecting the service life of the mechanism, and even causing the mechanism to jam due to corrosion, preventing the switch or knife switch from operating properly when opening or closing.

[0007] Causes of power accidents:

[0008] If condensation on the terminal block causes a short circuit between two secondary wires, especially in a switch tripping circuit, it will immediately cause the switch to malfunction and result in a power outage.

[0009] If the operating mechanism of a switch or disconnector becomes stuck due to corrosion, causing the moving and stationary contacts to open and close slowly, it can also lead to a major electrical accident.

[0010] Reduced equipment insulation performance:

[0011] Condensation easily forms inside the high-voltage switchgear in the high-voltage room, and the insulating porcelain insulators inside are often not designed to be waterproof. Condensation adhering to the insulating porcelain insulators reduces their insulation properties and may even lead to creepage or flickering phenomena, seriously affecting the normal operation of the equipment.

[0012] Traditional temperature and humidity control methods are often based on experience and lack scientific calculation and prediction, making it difficult to achieve the desired results.

[0013] To address this, the present invention proposes a computational fluid dynamics simulation method and system for the thermal and humidity distribution characteristics of substations under high humidity conditions. Summary of the Invention

[0014] In view of the above-mentioned problems, the present invention is proposed.

[0015] Therefore, the problem that this invention aims to solve is: how to address the issue that traditional temperature and humidity control methods are often based on experience and lack scientific calculation and prediction, making it difficult to achieve the desired results.

[0016] To address the aforementioned technical problems, this invention provides the following technical solution: a fluid dynamics simulation method for heat and humidity distribution in substations under high humidity conditions, comprising: establishing a physical model by creating a three-dimensional geometric model based on the substation's structure, equipment installation location, and equipment dimensions; setting simulation parameters by acquiring airflow velocity, humidity, and temperature data from sensors as initial conditions for the simulation; constructing a numerical simulation model of heat and humidity transfer within the substation based on fluid dynamics; performing numerical simulation by inputting the physical model and simulation parameters into numerical simulation software for calculation; analyzing the simulation results by post-processing the results to plot temperature and humidity distribution maps, temperature field, and humidity field cloud maps, and analyzing the temperature and humidity distribution characteristics of different areas within the substation; and optimizing temperature and humidity control strategies by adjusting the location and power of ventilation equipment and adding or removing dehumidifying devices based on the simulation results.

[0017] As a preferred embodiment of the fluid dynamics simulation method for heat and humidity distribution in substations under high humidity conditions described in this invention, the three-dimensional geometric model includes: obtaining the building structure parameters of the substation through design drawings or measurement, and performing three-dimensional modeling based on the parameters to form a frame structure; obtaining the equipment within the substation, performing three-dimensional modeling of the components based on the equipment parameters to form sub-block data for each model; assembling the equipment components according to their position relative to the substation; and performing the same operation on the corresponding sub-blocks when the equipment components of the substation are modified or added / deleted.

[0018] As a preferred embodiment of the fluid dynamics simulation method for heat and humidity distribution in substations under high humidity conditions described in this invention, the numerical simulation model includes: selecting CFD software for power system heat and humidity transfer simulation, meshing the established three-dimensional geometric model, determining key regions, increasing the mesh density in the key regions, selecting a physical model, performing simulation, and numerical solution; the determination of key regions includes key regions centered on equipment and ventilation openings, and the coordinate range of the key regions is expressed as follows:

[0019] (x min -Δx, x max +Δx)

[0020] (y min -Δy,y max +Δy)

[0021] (z min -Δz,z max +Δz)

[0022]

[0023] Where, x min x max y min y max z min z max These represent the maximum and minimum values ​​of the three-axis coordinates of the equipment or vent.

[0024] As a preferred embodiment of the fluid dynamics simulation method for heat and humidity distribution in substations under high humidity conditions described in this invention, the selected physical model includes any one of the following: turbulence model, radiation model, and humidity transfer model; the turbulence model includes the k-ε model and the LES model; the radiation model includes the DO model and the S2S model; and the humidity transfer model includes the diffusion model and the condensation model.

[0025] As a preferred embodiment of the fluid dynamics simulation method for the heat and humidity distribution of substations under high humidity conditions described in this invention, the numerical solution includes any one of the following: finite volume method, finite difference method, implicit solver, explicit solver, SIMPLE algorithm, and PISO algorithm; or a combination of the following algorithms: finite volume method, finite difference method, implicit solver, explicit solver, SIMPLE algorithm, and PISO algorithm.

[0026] As a preferred embodiment of the fluid dynamics simulation method for the heat and humidity distribution of substations under high humidity conditions described in this invention, the combined algorithm includes solving the problem using each solution method to obtain n corresponding solutions M1, ... M2. n The final solution is expressed as:

[0027]

[0028] Where M′ is the final solution, k i The weighting coefficient is expressed as:

[0029]

[0030] Among them, M 总 For the sum of all solutions, The mean of all solutions.

[0031] As a preferred embodiment of the fluid dynamics simulation method for the heat and humidity distribution of a substation under high humidity conditions described in this invention, the optimized temperature and humidity control strategy includes determining the temperature and humidity thresholds for each region, obtaining the temperature and humidity values ​​of the corresponding regions in the simulation results, and using negative feedback to adjust the ventilation equipment based on the difference between the two.

[0032] Another objective of this invention is to provide a system for simulating the thermal and humidity distribution of substations under high humidity conditions. This system solves the problem of simulating the thermal and humidity distribution of substations under high humidity conditions by constructing a system for simulating the thermal and humidity distribution of substations under high humidity conditions.

[0033] To address the aforementioned technical problems, this invention provides the following technical solution: a fluid dynamics simulation system for the heat and humidity distribution of a substation under high humidity conditions, comprising a data acquisition module, a modeling module, and a simulation software module; the data acquisition module is used to acquire data; the modeling module is used to create a physical model; and the simulation software module combines the acquired data and the physical model to perform simulation analysis.

[0034] A computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the steps of the fluid dynamics simulation method for the heat and humidity distribution of a substation under high humidity environment as described above.

[0035] A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the fluid dynamics simulation method for the heat and humidity distribution of a substation under high humidity conditions as described above.

[0036] The beneficial effects of this invention are as follows: The fluid dynamics simulation method for the heat and humidity distribution of substations under high humidity environments provided by this invention combines numerical simulation and physical models, enabling accurate calculation of the temperature and humidity distribution characteristics in different areas within the substation. This helps to promptly identify and resolve potential problems. The optimized temperature and humidity control strategy of this invention can significantly improve the operational stability and safety of substation equipment, reduce the failure rate, and extend the service life of the equipment. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 The flowchart shows a fluid dynamics simulation method for heat and humidity distribution in a substation under high humidity conditions, provided in the first embodiment of the present invention.

[0039] Figure 2 The diagram shows the structure of a fluid dynamics simulation system for heat and humidity distribution in a substation under high humidity conditions, as provided in the second embodiment of the present invention. Detailed Implementation

[0040] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0042] Example 1, referring to Figure 1 This is the first embodiment of the present invention, which provides a fluid dynamics simulation method for the heat and humidity distribution of a substation under high humidity conditions. The method includes: establishing a physical model by creating a three-dimensional geometric model based on the substation's structure, equipment installation location, and equipment dimensions; setting simulation parameters by acquiring airflow velocity, humidity, and temperature data from sensors as initial conditions for the simulation; constructing a numerical simulation model of heat and humidity transfer within the substation based on fluid dynamics; performing numerical simulation by inputting the physical model and simulation parameters into numerical simulation software for calculation; analyzing the simulation results by post-processing the results to plot temperature and humidity distribution maps, temperature field, and humidity field cloud maps, and analyzing the temperature and humidity distribution characteristics of different areas within the substation; and optimizing temperature and humidity control strategies by adjusting the location and power of ventilation equipment and adding or removing dehumidifying devices based on the simulation results.

[0043] S1: Establish a physical model. Based on the structure of the substation and the installation location and size of the equipment, establish a three-dimensional geometric model.

[0044] S2: Set simulation parameters and use sensors to acquire airflow velocity, humidity, and temperature data of the substation, which will be used as the initial conditions for the simulation.

[0045] S3: Construct a numerical simulation model. Based on fluid dynamics, construct a numerical simulation model of heat and moisture transfer inside the substation.

[0046] S4: Numerical simulation, which involves inputting the physical model and simulation parameters into numerical simulation software for simulation calculation.

[0047] S5: Analyze the simulation results, perform post-processing on the simulation results, draw temperature and humidity distribution maps, temperature field and humidity field cloud maps, and analyze the temperature and humidity distribution characteristics of different areas inside the substation.

[0048] S6: Optimize temperature and humidity control strategies. Based on simulation results, adjust the position and power of ventilation equipment and add or remove dehumidification devices.

[0049] Step S1 includes the following steps:

[0050] S11: Obtain the building structure parameters of the substation through the design drawings or by measurement, and perform three-dimensional modeling based on the parameters to form a frame structure.

[0051] S12: Then acquire the equipment in the substation, perform 3D modeling of the components based on the equipment parameters, and form the sub-block data of each model.

[0052] S13: Finally, assemble the equipment components according to their position relative to the substation.

[0053] S14: When equipment components in a substation are modified or added / deleted, the same operation can be performed on the corresponding sub-blocks.

[0054] Step S3 includes the following steps:

[0055] S31: Select a CFD software for simulating heat and moisture transfer in a power system and mesh the established geometric model.

[0056] S32: Identify key regions and increase the mesh density in those regions.

[0057] S33: Select the physical model and then perform the simulation.

[0058] S34: Then perform numerical solutions.

[0059] In step S32, the critical area is centered on equipment and ventilation openings, and the coordinate range of the critical area is:

[0060] (x min -Δx, x max +Δx)

[0061] (y min -Δy,y max +Δy)

[0062] (z min -Δz,z max +Δz)

[0063] Where, x min x max y min y max z min z max The maximum and minimum values ​​of the three-axis coordinates of the equipment or vent are Δx, Δy, and Δz.

[0064] in:

[0065]

[0066] In step S33, the physical model can be any one of the following: turbulence model, radiation model, or humidity transfer model; the turbulence model includes the k-ε model and the LES model; the radiation model includes the DO model and the S2S model; and the humidity transfer model includes the diffusion model and the condensation model.

[0067] In step S34, the solution method can be any one of the following: finite volume method, finite difference method, implicit solver, explicit solver, SIMPLE algorithm, or PISO algorithm.

[0068] Alternatively, in step S34, the solution method employs a combination of the finite volume method, finite difference method, implicit solver, explicit solver, SIMPLE algorithm, and PISO algorithm, which includes the following steps:

[0069] S341: Solve using each solution method to obtain n corresponding solutions M1, ... M n .

[0070] S342: Then calculate the final solution according to the formula, which is expressed as:

[0071]

[0072] Where M′ is the final solution, k i The weighting coefficient is expressed as:

[0073]

[0074] Among them, M 总 For the sum of all solutions, The mean of all solutions.

[0075] Step S6 includes the following steps:

[0076] S61: Determine the temperature and humidity thresholds for each area.

[0077] S62: Obtain the temperature and humidity values ​​of the corresponding area in the simulation results.

[0078] S63: Based on the difference between the two, a negative feedback method is used to adjust the ventilation equipment.

[0079] Example 2, refer to Figure 2 This is the second embodiment of the present invention, which differs from the previous embodiment in that it provides a fluid dynamics simulation system for the heat and humidity distribution of a substation under high humidity conditions, including: a data acquisition module 100, a modeling module 200, and a simulation software module 300.

[0080] The data acquisition module 100 is used to collect data.

[0081] Modeling module 200 is used for physical modeling.

[0082] The simulation software module 300 combines the collected data with the physical model to perform simulation analysis.

[0083] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0084] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0085] More specific examples of computer-readable media (a non-exhaustive list) include: electrical connections (electronic devices) having one or more wires, portable computer disk drives (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0086] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0087] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A fluid dynamics simulation method for heat and humidity distribution in substations under high humidity conditions, characterized by: include, A physical model is established, and a three-dimensional geometric model is created based on the structure of the substation and the installation location and size of the equipment. Set simulation parameters and use sensors to acquire airflow velocity, humidity, and temperature data of the substation, which will be used as the initial conditions for the simulation. A numerical simulation model of heat and moisture transfer inside a substation is constructed based on fluid dynamics. Numerical simulation involves inputting the physical model and simulation parameters into numerical simulation software to perform simulation calculations. Analyze the simulation results, perform post-processing on the simulation results, draw temperature and humidity distribution maps, temperature field and humidity field cloud maps, and analyze the temperature and humidity distribution characteristics of different areas inside the substation. Optimize temperature and humidity control strategies by adjusting the location and power of ventilation equipment and adding or removing dehumidification devices based on simulation results; The three-dimensional geometric model includes obtaining the building structure parameters of the substation through design drawings or measurement, and performing three-dimensional modeling based on the parameters to form a frame structure; Acquire the equipment within the substation, and create 3D models of the components based on the equipment parameters, forming data for each modeled sub-block. Assembly is performed according to the position of the equipment components relative to the substation; When equipment components in a substation are modified or added / deleted, the same operation can be performed on the corresponding sub-blocks. The numerical simulation model includes selecting CFD software for power system heat and moisture transfer simulation, meshing the established three-dimensional geometric model, determining key regions, increasing the mesh density in key regions, selecting a physical model, performing simulation, and numerical solution. The determination of key areas includes key areas centered on equipment and ventilation openings, and the coordinate range of the key areas is represented as follows. (x min -Δx,x max +Δx) (y min -Δy,y max +Δy) (with min -Δz,z max +Δz) Where, x min x max y min y max z min z max These represent the maximum and minimum values ​​of the three-axis coordinates of the equipment or vent.

2. The fluid dynamics simulation method for heat and humidity distribution in substations under high humidity conditions as described in claim 1, characterized in that: The selected physical model includes any one of the following: turbulence model, radiation model, and humidity transfer model. The turbulence models include the k-ε model and the LES model; The radiation model includes the DO model and the S2S model; The humidity transfer model includes a diffusion model and a condensation model.

3. The fluid dynamics simulation method for heat and humidity distribution in substations under high humidity conditions as described in claim 2, characterized in that: The numerical solution includes any one of the following methods: finite volume method, finite difference method, implicit solver, explicit solver, SIMPLE algorithm, and PISO algorithm; Alternatively, a combination of algorithms such as the finite volume method, finite difference method, implicit solver, explicit solver, SIMPLE algorithm, and PISO algorithm can be used to solve the problem.

4. The fluid dynamics simulation method for heat and humidity distribution in substations under high humidity conditions as described in claim 3, characterized in that: The combined algorithm involves using each solution method to obtain n corresponding solutions M1, ... M2. n ; The final solution is expressed as follows: Where M′ is the final solution, k i The weighting coefficient is represented as follows: Among them, M 总 For the sum of all solutions, The mean of all solutions.

5. The fluid dynamics simulation method for heat and humidity distribution in substations under high humidity conditions as described in claim 4, characterized in that: The optimized temperature and humidity control strategy includes determining the temperature and humidity thresholds for each region, obtaining the temperature and humidity values ​​of the corresponding region in the simulation results, and adjusting the ventilation equipment using negative feedback based on the difference between the two.

6. A system employing the fluid dynamics simulation method for heat and humidity distribution in substations under high humidity conditions as described in any one of claims 1 to 5, characterized in that: It includes a data acquisition module (100), a modeling module (200), and a simulation software module (300); The data acquisition module (100) is used to acquire data; The modeling module (200) is used for physical modeling; The simulation software module (300) combines the collected data and physical model to perform simulation analysis.

7. 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 fluid dynamics simulation method for the heat and humidity distribution of a substation under high humidity conditions as described in any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, it implements the steps of the fluid dynamics simulation method for the heat and humidity distribution of a substation under high humidity conditions as described in any one of claims 1 to 5.

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