Hydrodynamic simulation method and system for heat and humidity distribution of transformer substation in high-humidity environment

Abstract

The invention discloses a hydrodynamic simulation method and system for heat and humidity distribution of a transformer substation in a high-humidity environment, and relates to the technical field of simulation, and the method comprises the steps: building a physical model, and building a three-dimensional geometric model according to the structure of the transformer substation and the equipment installation position and equipment size of the transformer substation; simulation parameters are set, and the air flowing speed, humidity and temperature data of the transformer substation are obtained through a sensor and serve as initial conditions of simulation; building a numerical simulation model, and building the numerical simulation model of heat and humidity transfer in the transformer substation based on fluid dynamics; numerical simulation: inputting the physical model and simulation parameters into numerical simulation software, and performing simulation calculation; and analyzing the simulation result, and performing post-processing on the simulation result. Through combination of numerical simulation and a physical model, the temperature and humidity distribution characteristics of different areas in the transformer substation can be accurately calculated, and potential problems can be timely found and solved.

Description

Technical Field

[0001] The present invention relates to the field of simulation technology, in particular to a fluid mechanics simulation method and system for heat and moisture distribution of a transformer substation under a high humidity environment. Background Art

[0002] In a high humidity environment, uneven temperature and humidity distribution inside the substation may cause equipment failures, such as condensation, which will affect the operation of the substation equipment.

[0003] Specifically:

[0004] Corrosion equipment:

[0005] In the terminal box mechanism box, the dew formed on the secondary wiring terminal block will cause corrosion to the metal conductive parts on the terminal block. This corrosion may be aggravated by the mixing of impurities such as dust, which will cause AC and DC short circuit grounding. DC grounding poses a great threat to the stable operation of the substation secondary system.

[0006] Dew can also corrode the metal parts inside the switch or knife switch operating mechanism, affecting the service life of the mechanism, and even causing the mechanism to get stuck due to rust, resulting in the switch or knife switch failing to operate properly when opening or closing.

[0007] Causes of electrical accidents:

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

[0009] If the switch or knife switch operating mechanism becomes stuck due to rust, causing the switch's moving and static contacts to open and close slowly, it can also cause a serious electrical accident.

[0010] Reduce the insulation performance of equipment:

[0011] Condensation is easy to occur in the high-voltage switch cabinet in the high-voltage room, and the insulation porcelain bottles in the cabinet are mostly not waterproof. Condensation adhering to the insulation porcelain bottles will reduce its insulation, and may even cause creepage or flicker, seriously affecting the normal operation of the equipment.

[0012] Traditional temperature and humidity control methods are often based on experience and judgment, lack scientific calculations and predictions, and are difficult to achieve ideal results.

[0013] To this end, the present invention proposes a computational fluid dynamics simulation method and system for heat and moisture distribution characteristics of a substation under a high humidity environment. Summary of the invention

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

[0015] Therefore, the problem to be solved by the present invention is: how to solve the problem that traditional temperature and humidity control methods are often based on empirical judgment, lack scientific calculation and prediction, and are difficult to achieve ideal results.

[0016] To solve the above technical problems, the present invention provides the following technical solutions: a fluid dynamics simulation method for heat and moisture distribution of a substation under a high humidity environment, comprising: establishing a physical model, establishing a three-dimensional geometric model according to the structure of the substation and the equipment installation position and equipment size of the substation; setting simulation parameters, using sensors to obtain the air flow velocity, humidity, and temperature data of the substation, and using them as initial conditions for simulation; constructing a numerical simulation model of heat and moisture transfer inside the substation based on fluid dynamics; numerical simulation, inputting the physical model and simulation parameters into numerical simulation software, and performing simulation calculations; analyzing the simulation results, post-processing the simulation results, drawing temperature and humidity distribution diagrams, temperature field and humidity field cloud diagrams, and analyzing the temperature and humidity distribution characteristics of different areas inside the substation; optimizing the temperature and humidity control strategy, and adjusting the position and power of the ventilation equipment and increasing or decreasing the dehumidification device according to the simulation results.

[0017] As a preferred solution of the fluid mechanics simulation method for heat and moisture distribution of a substation under a high humidity environment described in the present invention, the three-dimensional geometric model includes obtaining the architectural structure parameters of the substation through the design drawings of the substation or by measurement, and performing three-dimensional modeling based on the parameters to form a frame structure; obtaining the equipment in the substation, performing three-dimensional modeling of the components based on the equipment parameters, and forming sub-block data for each modeling; assembling the equipment components based on their positions relative to the substation; when the equipment components of the substation are modified or added or deleted, the same operation can be performed on the corresponding sub-blocks.

[0018] As a preferred solution of the fluid mechanics simulation method for heat and moisture distribution of a substation under a high humidity environment of the present invention, the numerical simulation model includes selecting CFD software for heat and moisture transfer simulation of a power system, meshing the established three-dimensional geometric model, determining key areas, increasing the density of the mesh in the key areas, selecting a physical model, performing simulation, and performing numerical solution; the key areas are determined including key areas with equipment and vents as the core, and the coordinate range of the key areas is expressed as:

[0019] (x min -Δx,x max +Δx)

[0020] (y min -Δy,y max +Δy)

[0021] (z min -Δz,z max +Δz)

[0022]

[0023] Among them, x min 、x max ,y min ,y max 、z min 、z max The maximum and minimum values ​​of the three-axis coordinates of the device or vent.

[0024] As a preferred scheme of the fluid mechanics simulation method of heat and moisture distribution of substation under high humidity environment described in the present invention, wherein: the selected physical model includes the physical model being any one of a turbulence model, a radiation model, and a humidity transfer model; the turbulence model includes a k-ε model and a LES model; the radiation model includes a DO model and an S2S model; the humidity transfer model includes a diffusion model and a condensation model.

[0025] As a preferred scheme of the fluid mechanics simulation method of heat and moisture distribution of substation under high humidity environment described in the present invention, wherein: the numerical solution includes the solution method being any one of the finite volume method, finite difference method, implicit solver, explicit solver, SIMPLE algorithm, and PISO algorithm; or the solution method adopts a combination of the finite volume method, finite difference method, implicit solver, explicit solver, SIMPLE algorithm, and PISO algorithm.

[0026] As a preferred solution of the fluid mechanics simulation method for heat and moisture distribution of a substation under a high humidity environment of the present invention, wherein: the combined algorithm includes using each solution method to solve, and obtaining n corresponding solutions M1, ... M n ; The final solution is expressed as:

[0027]

[0028] Among them, M′ is the final solution, k i is the weight coefficient, expressed as:

[0029]

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

[0031] As a preferred scheme of the fluid mechanics simulation method of heat and humidity distribution of substations under high humidity environment described in the present invention, the optimized temperature and humidity control strategy includes determining the temperature and humidity thresholds of each area, obtaining the temperature and humidity values ​​of the corresponding area in the simulation results, and using negative feedback to adjust the ventilation equipment according to the difference between the two.

[0032] Another object of the present invention is to provide a system for a fluid mechanics simulation method for heat and moisture distribution of a substation under a high humidity environment, which can solve the problem of fluid mechanics simulation of heat and moisture distribution of a substation under a high humidity environment by constructing a fluid mechanics simulation system for heat and moisture distribution of a substation under a high humidity environment.

[0033] To solve the above technical problems, the present invention provides the following technical solutions: a fluid mechanics simulation system for heat and moisture distribution of a substation under a high humidity environment, comprising a data acquisition module, a modeling module and a simulation software module; the data acquisition module is used to collect data; the modeling module is used to model a physical model; the simulation software module performs simulation analysis in combination with the collected data and the physical model.

[0034] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the fluid mechanics simulation method for heat and moisture distribution of a substation in a high humidity environment as described above are implemented.

[0035] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the fluid mechanics simulation method for heat and moisture distribution of a substation in a high-humidity environment as described above.

[0036] The beneficial effects of the present invention are as follows: the fluid mechanics simulation method for heat and humidity distribution of a substation under a high humidity environment provided by the present invention can accurately calculate the temperature and humidity distribution characteristics of different areas inside the substation by combining numerical simulation and physical models, which helps to timely discover and solve potential problems. The optimized temperature and humidity control strategy of the present invention can significantly improve the operating stability and safety of substation equipment, reduce the failure rate, and extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0038] Figure 1 A flow chart of a fluid mechanics simulation method for heat and moisture distribution in a substation under a high humidity environment provided in the first embodiment of the present invention.

[0039] Figure 2 A structural diagram of a fluid mechanics simulation system for heat and moisture distribution in a substation under a high humidity environment provided by the second embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0041] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0042] Example 1, reference Figure 1 , which is the first embodiment of the present invention, and provides a fluid dynamics simulation method for heat and moisture distribution of a substation under a high humidity environment, including: establishing a physical model, establishing a three-dimensional geometric model according to the structure of the substation and the equipment installation position and equipment size of the substation; setting simulation parameters, using sensors to obtain air flow velocity, humidity, and temperature data of the substation, and using them as initial conditions for simulation; based on fluid dynamics, constructing a numerical simulation model of heat and moisture transfer inside the substation; numerical simulation, inputting the physical model and simulation parameters into the numerical simulation software, and performing simulation calculations; analyzing the simulation results, post-processing the simulation results, drawing temperature and humidity distribution diagrams, temperature field and humidity field cloud diagrams, and analyzing the temperature and humidity distribution characteristics of different areas inside the substation; optimizing the temperature and humidity control strategy, and adjusting the position and power of the ventilation equipment and increasing or decreasing the dehumidification device according to the simulation results.

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

[0044] S2: Set simulation parameters and use sensors to obtain the air flow velocity, humidity, and temperature data of the substation, which are used as the initial conditions for the simulation.

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

[0046] S4: Numerical simulation: input the physical model and simulation parameters into the numerical simulation software for simulation calculation.

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

[0048] S6: Optimize the temperature and humidity control strategy, adjust the location and power of ventilation equipment, and increase or decrease the dehumidification device according to the simulation results.

[0049] In step S1, it includes the following steps:

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

[0051] S12: Then, the equipment in the substation is obtained, and three-dimensional modeling of the components is performed according to the equipment parameters to form sub-block data of each modeling.

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

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

[0054] Step S3 includes the following steps:

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

[0056] S32: Identify key areas and increase the density of the grid in the key areas.

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

[0058] S34: Then a numerical solution is performed.

[0059] In step S32, the key area is centered on the equipment and vents, and the coordinate range of the key area is:

[0060] (x min -Δx,x max +Δx)

[0061] (y min -Δy,y max +Δy)

[0062] (z min -Δz,z max +Δz)

[0063] Among them, 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, Δx, Δy, Δz.

[0064] in:

[0065]

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

[0067] In step S34, the solution method is any one of the finite volume method, finite difference method, implicit solver, explicit solver, SIMPLE algorithm, and PISO algorithm.

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

[0069] S341: Use each solution method to solve and obtain n corresponding solutions M1, ...M n .

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

[0071]

[0072] Among them, M′ is the final solution, k i is the weight coefficient, expressed as:

[0073]

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

[0075] In step S6, it 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, the ventilation equipment is adjusted using negative feedback.

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

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

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

[0082] The simulation software module 300 performs simulation analysis in combination with the collected data and the physical model.

[0083] If the functions are implemented in the form of 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 the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

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

[0085] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0086] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0087] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A fluid mechanics simulation method for heat and humidity distribution in a substation under a high humidity environment, characterized by: include, Establish a physical model, and establish a three-dimensional geometric model based on the structure of the substation and the equipment installation location and equipment size of the substation; Set simulation parameters and use sensors to obtain the air flow velocity, humidity, and temperature data of the substation, which will be used as the initial conditions for the simulation; Based on fluid dynamics, a numerical simulation model of heat and moisture transfer inside the substation is constructed; Numerical simulation: input the physical model and simulation parameters into the numerical simulation software to perform simulation calculations; Analyze the simulation results, perform post-processing on the simulation results, draw temperature and humidity distribution diagrams, temperature field and humidity field cloud diagrams, and analyze the temperature and humidity distribution characteristics of different areas inside the substation; Optimize the temperature and humidity control strategy, adjust the location and power of ventilation equipment, and increase or decrease dehumidification devices based on the simulation results.

2. The fluid mechanics simulation method for heat and humidity distribution of a substation under a high humidity environment as claimed in claim 1, characterized in that: The three-dimensional geometric model includes obtaining the building structure parameters of the substation through the design drawings of the substation or by measurement, and performing three-dimensional modeling according to the parameters to form a framework structure; Obtain the equipment in the substation, perform 3D modeling of the components according to the equipment parameters, and form sub-block data for each modeling; Assemble the equipment parts according to their location relative to the substation; When the equipment parts of the substation are modified or added or deleted, the same operation can be performed on the corresponding sub-blocks.

3. The fluid mechanics simulation method for heat and humidity distribution of a substation under a high humidity environment as claimed in claim 2, characterized in that: 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 areas, increasing the density of the mesh in the key areas, selecting a physical model, performing simulation, and performing numerical solution; The key area is determined by taking the equipment and the vent as the core, and the coordinate range of the key area is expressed as: (x min -Δx, x max +Δx) (y min -Δy,y max +Δy) (with min -Δz,z max +Δz) Among them, x min 、x max ,y min ,y max 、z min 、z max The maximum and minimum values ​​of the three-axis coordinates of the device or vent.

4. The fluid mechanics simulation method for heat and humidity distribution of a substation under a high humidity environment as claimed in claim 3, characterized in that: The selecting of the physical model includes the physical model being any one of a turbulence model, a radiation model, and a humidity transfer model; The turbulence model includes a k-ε model and a LES model; The radiation model includes a DO model and an S2S model; The humidity transfer model includes a diffusion model and a condensation model.

5. The fluid mechanics simulation method for heat and humidity distribution of a substation under a high humidity environment as claimed in claim 4, characterized in that: The numerical solution includes using any one of a finite volume method, a finite difference method, an implicit solver, an explicit solver, a SIMPLE algorithm, and a PISO algorithm; Or the solving method adopts a combination of finite volume method, finite difference method, implicit solver, explicit solver, SIMPLE algorithm and PISO algorithm.

6. The fluid mechanics simulation method for heat and humidity distribution of a substation under a high humidity environment as claimed in claim 5, characterized in that: The combined algorithm includes using each solution method to obtain n corresponding solutions M1, ..., M n ; The final solution is expressed as, Among them, M′ is the final solution, k i is the weight coefficient, expressed as, Among them, M 总 is the sum of all solutions, is the mean of all solutions.

7. The fluid mechanics simulation method for heat and humidity distribution of a substation under a high humidity environment as claimed in claim 6, characterized in that: The optimized temperature and humidity control strategy includes determining the temperature and humidity thresholds of each area, obtaining the temperature and humidity values ​​of the corresponding area in the simulation results, and using negative feedback to adjust the ventilation equipment according to the difference between the two.

8. A system using the fluid mechanics simulation method for heat and humidity distribution in a substation under a high humidity environment as claimed in any one of claims 1 to 7, 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 collect data; The modeling module (200) is used for physical modeling; The simulation software module (300) combines the collected data with the physical model to perform simulation analysis.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the fluid dynamics simulation method for heat and moisture distribution in a substation under a high humidity environment according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the fluid dynamics simulation method for heat and moisture distribution in a substation under a high humidity environment according to any one of claims 1 to 7 are implemented.

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