CN117852224A

CN117852224A - Cable trench heat dissipation test method and device, computer equipment and storage medium

Info

Publication number: CN117852224A
Application number: CN202311824209.5A
Authority: CN
Inventors: 郭霖徽; 雷超平; 夏铭聪; 童家鹏; 吴其洛; 何淇彰; 贾鹏辉
Original assignee: Guangzhou Power Supply Bureau of Guangdong Power Grid Co Ltd
Current assignee: Guangzhou Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date: 2023-12-27
Filing date: 2023-12-27
Publication date: 2024-04-09

Abstract

The application relates to a cable trench heat dissipation testing method, a device, computer equipment and a storage medium. The method comprises the following steps: constructing a three-dimensional multi-physical-field coupling simulation model of a transformer substation outgoing cable trench; acquiring first association information between gaps among cable trench cover plates and between current carrying capacity of cables in the trench according to a three-dimensional multi-physical field coupling simulation model, and determining gap parameters among the cable trench cover plates according to the first association information; acquiring second association information between holes of the cable trench cover plate and current carrying capacity of the cable in the trench according to the three-dimensional multi-physical field coupling simulation model, and determining hole parameters of the cable trench cover plate according to the second association information; and according to the gap parameters and the hole parameters, obtaining a heat dissipation test result of the outlet cable trench of the transformer substation. The heat dissipation test is carried out based on the simulation model, additional equipment or filling medium is not needed, the test workload is small, the applicability is good, and the heat dissipation improvement difficulty of the outgoing cable trench of the transformer substation can be greatly reduced by adopting the method.

Description

Cable trench heat dissipation test method and device, computer equipment and storage medium

Technical Field

The present application relates to the field of computer technology, and in particular, to a cable trench heat dissipation testing method, apparatus, computer device, storage medium, and computer program product.

Background

Based on the consideration of convenience in operation and maintenance and stable transmission performance, a cable trench laying mode is often adopted for the outgoing cable of the transformer substation. For the outgoing cable trench of the transformer substation, the number of the internal cable loops is often large, so that the overall heating value in the trench is high, and the cables are mostly densely packed at the bottom of the cable trench, so that the mutual heating effect among the cables is obvious. In addition, the mode that cable heat dissipation in the ditch mainly relies on heat convection and heat radiation, the airtight narrow and small air velocity in the ditch that causes of transformer substation's wire outlet cable ditch inner space, and because the cable group adopts the mode of stacking only outside cable can carry out effective heat transfer with the air in the ditch, consequently, lay in the heat exchange efficiency between the mode of transformer substation's wire outlet cable ditch and external environment lower through heat convection. Considering the influence of heating and heat dissipation comprehensively, the cable running temperature in the ditch is often higher, and this leads to the cable ditch of transformer substation to become one of the thermal bottleneck points of whole cable wire, has higher overheat risk, and even probably induces the conflagration when serious. Therefore, how to effectively reduce the hot spot temperature in the outlet cable trench of the transformer substation becomes a pain spot problem to be solved urgently in the process of improving the operation safety of the cable line, and the reduction of the hot spot temperature in the outlet cable trench of the transformer substation can improve the load capacity of the cable in the trench so as to improve the utilization rate of the cable asset.

In the traditional technology, current carrying capacity improving measures for cluster cabling are mainly divided into three main categories: 1) The first type of method improves the temperature distribution condition of the cable group by optimizing the load distribution of the cable group, but the method has limited effect on reducing the hot spot temperature of the cable group, and the method is invalid due to the fact that the cable of the outlet cable duct of the transformer substation is possibly transposed along the line; 2) The second type of method optimizes the heat dissipation environment of the cable group by changing the size of the cable trench, but the method is only suitable for the design stage; 3) The third type of method improves the heat dissipation environment of the cable group in the trench by filling the cable trench with the high heat conduction material, the method has good effect of improving the current carrying capacity of the cable group, but the long-term aging performance of the high heat conduction material still needs to be further researched, and the field popularization and the application of the method still need to be further demonstrated. For the current carrying capacity improving measures of the cluster cabling proposed by the existing research, the first type of measures have the problem of unsatisfactory application effect, the second type of measures are not applicable in the cable operation stage, and the third type of measures do not meet the foundation of large-area popularization and use. The current carrying capacity lifting measures of the existing cluster cabling are poor in applicability to cable trench cabling scenes of transformer substations, and a proper improvement scheme is difficult to determine.

The heat dissipation of the outlet cable trench of the existing transformer substation is difficult to improve.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a cable duct heat dissipation testing method, apparatus, computer device, computer readable storage medium, and computer program product that can reduce the difficulty of heat dissipation improvement of a substation outlet cable duct.

In a first aspect, the present application provides a cable duct heat dissipation testing method, including:

according to analysis results of coupling actions among an electric field, a temperature field and a fluid field in the outlet cable trench of the transformer substation, a three-dimensional multi-physical field coupling simulation model of the outlet cable trench of the transformer substation is constructed; the three-dimensional multi-physical field coupling simulation model comprises gaps among cable channel cover plates and cable channel cover plates of the outlet cable channel of the transformer substation;

acquiring first association information between gaps among cable trench cover plates and between current carrying capacity of cables in the trench according to a three-dimensional multi-physical field coupling simulation model, and determining gap parameters among the cable trench cover plates according to the first association information;

acquiring second association information between holes of the cable trench cover plate and current carrying capacity of the cable in the trench according to the three-dimensional multi-physical field coupling simulation model, and determining hole parameters of the cable trench cover plate according to the second association information;

And according to the gap parameters and the hole parameters, obtaining a heat dissipation test result of the outlet cable trench of the transformer substation.

In one embodiment, a three-dimensional multi-physical field coupling simulation model of the transformer substation outgoing cable trench is constructed according to analysis results of coupling effects among an electric field, a temperature field and a fluid field in the transformer substation outgoing cable trench, and the three-dimensional multi-physical field coupling simulation model comprises:

according to the geometric dimension of the outlet cable trench of the transformer substation and the arrangement condition of cables in the trench, constructing a geometric model of the outlet cable trench of the transformer substation, and adding material properties to each part of the geometric model;

and adding an electrothermal coupling solving module and a thermal coupling solving module into the geometric model, and setting parameters of the electrothermal coupling solving module and the thermal coupling solving module according to the application scene of the outlet cable trench of the transformer substation to obtain the three-dimensional multi-physical field coupling simulation model.

In one embodiment, according to a three-dimensional multi-physical field coupling simulation model, first association information between a gap between cable trench cover plates and a current carrying capacity of a cable in a trench is obtained, and according to the first association information, a gap parameter between the cable trench cover plates is determined, including:

acquiring the widths of a plurality of cover plates; the cover plate width is used for influencing gaps among the cable trench cover plates;

Based on the width of each cover plate, comparing distribution conditions of fluid fields and temperature fields in outlet cable trenches of the transformer substation in different test scenes to obtain the influence degree of gaps among the cable trench cover plates on average flow velocity in the trenches and the temperature of cable hot spots, and using the influence degree as first associated information;

and acquiring target cover plate widths from the plurality of cover plate widths according to the first association information, wherein the target cover plate widths are used as gap parameters.

In one embodiment, according to a three-dimensional multi-physical field coupling simulation model, second association information between a hole of a cable trench cover plate and a current carrying capacity of a cable in a trench is obtained, and according to the second association information, hole parameters of the cable trench cover plate are determined, including:

obtaining multiple groups of alternative hole parameters; each group of alternative hole parameters comprises hole diameter information and hole distribution information;

based on each group of alternative hole parameters, comparing distribution conditions of fluid fields and temperature fields in the outlet cable channels of the transformer substation under different test scenes to obtain the influence degree of the cable channel cover plate holes on average flow velocity in the channels and the cable hot spot temperature, and using the influence degree as second associated information;

and acquiring a group of alternative hole parameters from the plurality of groups of alternative hole parameters according to the second association information, wherein the group of alternative hole parameters are used as hole parameters.

In one embodiment, according to the gap parameter and the hole parameter, a heat dissipation test result of the transformer substation outlet cable trench is obtained, including:

acquiring a plurality of test scenes of a transformer substation outgoing cable trench;

under each test scene, acquiring a single-scene test result of the outgoing cable trench of the transformer substation according to the gap parameter and the hole parameter;

and obtaining a heat dissipation test result according to the single-scene test result of each test scene.

In one embodiment, the method further comprises:

according to the application scene of the outgoing cable pit of the transformer substation, acquiring heat dissipation conditions;

under the condition that the heat radiation test result meets the heat radiation condition, taking the gap parameter and the hole parameter as improvement parameters; the improved parameters are used for improving the heat dissipation structure of the outlet cable trench of the transformer substation.

In a second aspect, the present application further provides a heat dissipation testing device for a cable pit, including:

the model construction module is used for constructing a three-dimensional multi-physical field coupling simulation model of the outgoing cable duct of the transformer substation according to analysis results of coupling actions among an electric field, a temperature field and a fluid field in the outgoing cable duct of the transformer substation; the three-dimensional multi-physical field coupling simulation model comprises gaps among cable channel cover plates and cable channel cover plates of the outlet cable channel of the transformer substation;

The first acquisition module is used for acquiring first association information between gaps among the cable trench cover plates and the current carrying capacity of the cable in the trench according to the three-dimensional multi-physical field coupling simulation model, and determining gap parameters among the cable trench cover plates according to the first association information;

the second acquisition module is used for acquiring second association information between the holes of the cable trench cover plate and the current carrying capacity of the cable in the trench according to the three-dimensional multi-physical field coupling simulation model, and determining hole parameters of the cable trench cover plate according to the second association information;

and the parameter testing module is used for acquiring a heat dissipation testing result of the transformer substation outgoing cable trench according to the gap parameter and the hole parameter.

In a third aspect, the present application also provides a computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:

In a fourth aspect, the present application also provides a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:

In a fifth aspect, the present application also provides a computer program product comprising a computer program which, when executed by a processor, performs the steps of:

According to the cable trench heat dissipation testing method, the device, the computer equipment, the storage medium and the computer program product, a three-dimensional multi-physical field coupling simulation model of the cable trench of the transformer substation is constructed according to analysis results of coupling actions among an electric field, a temperature field and a fluid field in the cable trench of the transformer substation; the three-dimensional multi-physical field coupling simulation model comprises gaps among cable channel cover plates and cable channel cover plates of the outlet cable channel of the transformer substation; acquiring first association information between gaps among cable trench cover plates and between current carrying capacity of cables in the trench according to a three-dimensional multi-physical field coupling simulation model, and determining gap parameters among the cable trench cover plates according to the first association information; acquiring second association information between holes of the cable trench cover plate and current carrying capacity of the cable in the trench according to the three-dimensional multi-physical field coupling simulation model, and determining hole parameters of the cable trench cover plate according to the second association information; and according to the gap parameters and the hole parameters, obtaining a heat dissipation test result of the outlet cable trench of the transformer substation. Based on a multi-physical field coupling simulation model of the outgoing cable trench of the transformer substation, proper cover plate gap design and cover plate punching design are determined, the heat dissipation environment of the cable in the trench is improved through air exchange outside the reinforced trench, heat dissipation test is performed based on the simulation model, external equipment or filling media are not needed, test workload is small, applicability is good, and heat dissipation improvement difficulty of the outgoing cable trench of the transformer substation can be greatly reduced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for a person having ordinary skill in the art.

FIG. 1 is a diagram of an application environment of a method for testing heat dissipation in a cable pit according to one embodiment;

FIG. 2 is a flow chart of a method for testing heat dissipation of a cable pit according to one embodiment;

FIG. 3 is a flow chart of a method for testing heat dissipation of a cable pit according to one embodiment;

fig. 4 is an internal structural diagram of a computer device in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

The cable duct heat dissipation testing method provided by the embodiment of the application can be applied to an application environment shown in fig. 1. Wherein the terminal 102 communicates with the server 104 via a network. The data storage system may store data that the server 104 needs to process. The data storage system may be integrated on the server 104 or may be located on a cloud or other network server. The terminal 102 may be, but not limited to, various personal computers, notebook computers, smart phones, tablet computers, internet of things devices, and portable wearable devices, where the internet of things devices may be smart speakers, smart televisions, smart air conditioners, smart vehicle devices, and the like. The portable wearable device may be a smart watch, smart bracelet, headset, or the like. The server 104 may be implemented as a stand-alone server or as a server cluster of multiple servers.

In an exemplary embodiment, as shown in fig. 2, a cable trench heat dissipation testing method is provided, and the method is applied to the terminal 102 in fig. 1 for illustration, and includes the following steps 202 to 208.

Wherein:

step 202, constructing a three-dimensional multi-physical field coupling simulation model of the outlet cable trench of the transformer substation according to analysis results of coupling actions among an electric field, a temperature field and a fluid field in the outlet cable trench of the transformer substation; the three-dimensional multi-physical field coupling simulation model comprises gaps among cable channel cover plates and cable channel cover plates of the outgoing cable channel of the transformer substation.

Optionally, a three-dimensional multi-physical field coupling simulation model of the transformer substation outgoing cable trench is established based on analysis of coupling effects among an electric field, a temperature field and a fluid field in the transformer substation outgoing cable trench.

Step 204, obtaining first association information between gaps among the cable trench cover plates and the current carrying capacity of the cable in the trench according to the three-dimensional multi-physical field coupling simulation model, and determining gap parameters among the cable trench cover plates according to the first association information.

Optionally, the influence of the gap between the cable trench cover plates on the improvement of the current carrying capacity of the cable in the trench is analyzed and changed by using a three-dimensional multi-physical field coupling simulation model of the outlet cable trench of the transformer substation, and a proper method for determining the gap between the cable trench cover plates is provided, wherein the method for determining the gap parameters between the cable trench cover plates is used for determining.

And 206, acquiring second association information between the holes of the cable trench cover plate and the current carrying capacity of the cable in the trench according to the three-dimensional multi-physical field coupling simulation model, and determining hole parameters of the cable trench cover plate according to the second association information.

Optionally, the influence of different cover plate punching schemes on the improvement of the current carrying capacity of the cable in the trench is analyzed by using a three-dimensional multi-physical field coupling simulation model of the transformer substation outlet cable trench, and a suitable cover plate hole size and distribution determining method is provided, wherein the cover plate hole size and distribution determining method is used for determining hole parameters of the cable trench cover plate.

And step 208, obtaining a heat dissipation test result of the outlet cable trench of the transformer substation according to the gap parameter and the hole parameter.

Optionally, aiming at the improvement requirements of the transmission capacity of the outlet cable trench of the transformer substation in different scenes, a heat dissipation improvement design scheme of the outlet cable trench of the transformer substation based on reinforced fluid is formed based on the combination of a gap design method between the cable trench cover plates and a perforation design method of the cable trench cover plates, and simulation test is performed according to the heat dissipation improvement design scheme of the outlet cable trench of the transformer substation, so that a heat dissipation test result of the outlet cable trench of the transformer substation is obtained.

In the cable trench heat dissipation test method, a three-dimensional multi-physical field coupling simulation model of the transformer substation outgoing cable trench is constructed according to analysis results of coupling actions among an electric field, a temperature field and a fluid field in the transformer substation outgoing cable trench; the three-dimensional multi-physical field coupling simulation model comprises gaps among cable channel cover plates and cable channel cover plates of the outlet cable channel of the transformer substation; acquiring first association information between gaps among cable trench cover plates and between current carrying capacity of cables in the trench according to a three-dimensional multi-physical field coupling simulation model, and determining gap parameters among the cable trench cover plates according to the first association information; acquiring second association information between holes of the cable trench cover plate and current carrying capacity of the cable in the trench according to the three-dimensional multi-physical field coupling simulation model, and determining hole parameters of the cable trench cover plate according to the second association information; and according to the gap parameters and the hole parameters, obtaining a heat dissipation test result of the outlet cable trench of the transformer substation. Based on a multi-physical field coupling simulation model of the outgoing cable trench of the transformer substation, a proper cover plate gap design and a cover plate punching design are determined based on a sensitivity analysis method, the heat dissipation environment of the cable in the trench is improved by enhancing air exchange outside the trench, heat dissipation testing is performed based on the simulation model, external equipment or filling media are not needed, testing workload is small, applicability is good, and heat dissipation improvement difficulty of the outgoing cable trench of the transformer substation can be greatly reduced.

In one embodiment, a three-dimensional multi-physical field coupling simulation model of the transformer substation outgoing cable trench is constructed according to analysis results of coupling effects among an electric field, a temperature field and a fluid field in the transformer substation outgoing cable trench, and the three-dimensional multi-physical field coupling simulation model comprises: according to the geometric dimension of the outlet cable trench of the transformer substation and the arrangement condition of cables in the trench, constructing a geometric model of the outlet cable trench of the transformer substation, and adding material properties to each part of the geometric model; and adding an electrothermal coupling solving module and a thermal coupling solving module into the geometric model, and setting parameters of the electrothermal coupling solving module and the thermal coupling solving module according to the application scene of the outlet cable trench of the transformer substation to obtain the three-dimensional multi-physical field coupling simulation model.

Optionally, a geometric model of the transformer substation outgoing cable trench is built according to the actual geometric dimension of the transformer substation outgoing cable trench and the specific arrangement condition of cables in the trench, and material properties are added to each part of the model. And an electrothermal coupling solving module and a thermal flow coupling solving module are added, and key parameters of each module are set according to the real laying scene of the outgoing cable trench of the transformer substation, wherein the key parameters include but are not limited to a current effective value, a deep ground temperature, an air temperature and a convection heat dissipation coefficient. And carrying out multi-scale mesh subdivision on the three-dimensional multi-physical field coupling simulation model of the outlet cable trench of the transformer substation, wherein meshes of the cable and the nearby part are subjected to refinement subdivision, and meshes of the environment part are subjected to coarsening subdivision.

In the embodiment, based on a multi-physical field coupling simulation model of the outgoing cable trench of the transformer substation, a proper cover plate gap design and a cover plate punching design are determined based on a sensitivity analysis method, the heat dissipation environment of the cable in the trench is improved by enhancing air exchange outside the trench, heat dissipation testing is performed based on the simulation model, external equipment or filling media are not needed, testing workload is small, applicability is good, and heat dissipation improvement difficulty of the outgoing cable trench of the transformer substation can be greatly reduced.

In one embodiment, according to a three-dimensional multi-physical field coupling simulation model, first correlation information between gaps among cable trench cover plates and cable current carrying capacity in a trench is obtained, and according to the first correlation information, gap parameters among the cable trench cover plates are determined, including: acquiring the widths of a plurality of cover plates; the cover plate width is used for influencing gaps among the cable trench cover plates; based on the width of each cover plate, comparing distribution conditions of fluid fields and temperature fields in outlet cable trenches of the transformer substation in different test scenes to obtain the influence degree of gaps among the cable trench cover plates on average flow velocity in the trenches and the temperature of cable hot spots, and using the influence degree as first associated information; and acquiring target cover plate widths from the plurality of cover plate widths according to the first association information, wherein the target cover plate widths are used as gap parameters.

And obtaining second association information between the holes of the cable trench cover plate and the current carrying capacity of the cable in the trench according to the three-dimensional multi-physical field coupling simulation model, and determining hole parameters of the cable trench cover plate according to the second association information, wherein the method comprises the following steps: obtaining multiple groups of alternative hole parameters; each group of alternative hole parameters comprises hole diameter information and hole distribution information; based on each group of alternative hole parameters, comparing distribution conditions of fluid fields and temperature fields in the outlet cable channels of the transformer substation under different test scenes to obtain the influence degree of the cable channel cover plate holes on average flow velocity in the channels and the cable hot spot temperature, and using the influence degree as second associated information; and acquiring a group of alternative hole parameters from the plurality of groups of alternative hole parameters according to the second association information, wherein the group of alternative hole parameters are used as hole parameters.

Optionally, the cover plate width in the three-dimensional simulation model of the outlet cable trench of the transformer substation is adjusted to simulate the gap scenes among different cable trench cover plates, and the influence of the gap among the cable trench cover plates on the average flow velocity in the trench and the cable hot spot temperature is analyzed and changed by comparing the calculation results of the distribution of the fluid field and the temperature field in the outlet cable trench of the transformer substation under different scenes. The marginal benefit of improving the current carrying capacity of the cable in the ditch by changing the gap between the cable ditch cover plates is calculated based on a sensitivity analysis method, and a gap design method between the cable ditch cover plates is provided and used for determining gap parameters.

And adjusting the diameters and distribution conditions of holes in the cover plate in the three-dimensional simulation model of the outlet cable trench of the transformer substation, realizing the simulation of punching schemes of different cable trench covers, and analyzing and changing the influence of the diameters and distribution conditions of the holes of the cover plate of the cable trench on the average flow velocity in the trench and the hot spot temperature of the cable by comparing the calculation results of the distribution of the fluid field and the temperature field in the outlet cable trench of the transformer substation under different schemes. The marginal benefit of improving the current carrying capacity of the cable in the ditch by changing the diameter and distribution condition of the holes of the cable ditch cover plate is calculated based on a sensitivity analysis method, and a cable ditch cover plate punching design method is provided and is used for determining hole parameters.

In one possible implementation, when analyzing the effect of the gap size between the outlet cable trench cover plates of the transformer substation and the cover plate opening distribution on the temperature field distribution in the trench, a thermal path method can be used to replace numerical simulation, but the implementation difficulty of establishing an accurate thermal path model is extremely high for the submerged cable trench for laying the multi-loop cable.

In one embodiment, according to the gap parameter and the hole parameter, obtaining a heat dissipation test result of the transformer substation outlet cable trench includes: acquiring a plurality of test scenes of a transformer substation outgoing cable trench; under each test scene, acquiring a single-scene test result of the outgoing cable trench of the transformer substation according to the gap parameter and the hole parameter; and obtaining a heat dissipation test result according to the single-scene test result of each test scene.

Further, according to the application scene of the outgoing cable trench of the transformer substation, heat dissipation conditions are obtained; under the condition that the heat radiation test result meets the heat radiation condition, taking the gap parameter and the hole parameter as improvement parameters; the improved parameters are used for improving the heat dissipation structure of the outlet cable trench of the transformer substation.

Wherein, the test scene and the application scene each comprise at least one environmental parameter, and the environmental parameter can be, but is not limited to, air temperature and air flow rate.

Optionally, the heat dissipation capacity requirements of the outgoing cable trench of the transformer substation in different scenes are determined, and the heat dissipation conditions to be met are determined according to the actual application scenes of the outgoing cable trench of the transformer substation. Based on the combination of the design method of gaps among the cable trench cover plates and the perforation design method of the cable trench cover plates, the heat dissipation alternative improved design scheme of the outlet cable trenches of the plurality of substations is obtained. And aiming at each alternative improved design scheme, acquiring single-scene test results under different scenes, thereby obtaining a comprehensive test result of each alternative improved design scheme, namely a heat dissipation test result. And taking an alternative improved design scheme of which the heat dissipation test result meets the heat dissipation condition as a target improved design scheme, and taking various structural parameters such as a gap parameter, a hole parameter and the like in the target improved design scheme as improved parameters so as to improve the heat dissipation structure of the transformer substation outgoing cable trench.

In one exemplary embodiment, a method for testing heat dissipation of a raceway includes:

according to the geometric dimension of the outlet cable trench of the transformer substation and the arrangement condition of cables in the trench, constructing a geometric model of the outlet cable trench of the transformer substation, and adding material properties to each part of the geometric model; and adding an electrothermal coupling solving module and a thermal coupling solving module into the geometric model, and setting parameters of the electrothermal coupling solving module and the thermal coupling solving module according to the application scene of the outlet cable trench of the transformer substation to obtain the three-dimensional multi-physical field coupling simulation model. The three-dimensional multi-physical field coupling simulation model comprises gaps among cable channel cover plates and cable channel cover plates of the outgoing cable channel of the transformer substation.

Acquiring the widths of a plurality of cover plates; the cover plate width is used for influencing gaps among the cable trench cover plates; based on the width of each cover plate, comparing distribution conditions of fluid fields and temperature fields in outlet cable trenches of the transformer substation in different test scenes to obtain the influence degree of gaps among the cable trench cover plates on average flow velocity in the trenches and the temperature of cable hot spots, and using the influence degree as first associated information; and acquiring target cover plate widths from the plurality of cover plate widths according to the first association information, wherein the target cover plate widths are used as gap parameters.

Obtaining multiple groups of alternative hole parameters; each group of alternative hole parameters comprises hole diameter information and hole distribution information; based on each group of alternative hole parameters, comparing distribution conditions of fluid fields and temperature fields in the outlet cable channels of the transformer substation under different test scenes to obtain the influence degree of the cable channel cover plate holes on average flow velocity in the channels and the cable hot spot temperature, and using the influence degree as second associated information; and acquiring a group of alternative hole parameters from the plurality of groups of alternative hole parameters according to the second association information, wherein the group of alternative hole parameters are used as hole parameters.

Acquiring a plurality of test scenes of a transformer substation outgoing cable trench; under each test scene, acquiring a single-scene test result of the outgoing cable trench of the transformer substation according to the gap parameter and the hole parameter; and obtaining a heat dissipation test result according to the single-scene test result of each test scene.

According to the application scene of the outgoing cable pit of the transformer substation, acquiring heat dissipation conditions; under the condition that the heat radiation test result meets the heat radiation condition, taking the gap parameter and the hole parameter as improvement parameters; the improved parameters are used for improving the heat dissipation structure of the outlet cable trench of the transformer substation.

In the embodiment, based on a multi-physical field coupling simulation model of the transformer substation outgoing cable trench, a proper cover plate gap design and a cover plate punching design are determined based on a sensitivity analysis method, and the heat dissipation environment of the cable in the trench is improved by enhancing air exchange outside the trench, so that the implementation is easy, additional equipment or filling media are not needed, the gaps and holes are only required to be prevented from being blocked in the application process, the maintenance workload is small, and the large-area popularization is easy.

It should be understood that, although the steps in the flowcharts related to the embodiments described above are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.

Based on the same inventive concept, the embodiment of the application also provides a cable trench heat dissipation testing device for realizing the cable trench heat dissipation testing method. The implementation of the solution provided by the device is similar to that described in the above method, so the specific limitation of the embodiment of the cable duct heat dissipation testing device or devices provided below may be referred to the limitation of the cable duct heat dissipation testing method hereinabove, and will not be repeated herein.

In one exemplary embodiment, as shown in FIG. 3, there is provided a raceway heat dissipation test device 300 comprising: a model building module 301, a first obtaining module 302, a second obtaining module 303, and a parameter testing module 304, wherein:

the model construction module 301 is configured to construct a three-dimensional multi-physical field coupling simulation model of the transformer substation outgoing cable trench according to analysis results of coupling actions among an electric field, a temperature field and a fluid field in the transformer substation outgoing cable trench; the three-dimensional multi-physical field coupling simulation model comprises gaps among cable channel cover plates and cable channel cover plates of the outlet cable channel of the transformer substation;

the first obtaining module 302 is configured to obtain first association information between a gap between the cable trench cover plates and a current carrying capacity of the cable in the trench according to the three-dimensional multi-physical field coupling simulation model, and determine a gap parameter between the cable trench cover plates according to the first association information;

The second obtaining module 303 is configured to obtain second association information between the hole of the cable trench cover and the current carrying capacity of the cable in the trench according to the three-dimensional multi-physical-field coupling simulation model, and determine a hole parameter of the cable trench cover according to the second association information;

and the parameter testing module 304 is configured to obtain a heat dissipation testing result of the transformer substation outlet cable trench according to the gap parameter and the hole parameter.

In one embodiment, the model building module 301 is further configured to build a geometric model of the transformer substation outgoing cable trench according to a geometric dimension of the transformer substation outgoing cable trench and an arrangement condition of cables in the trench, and add material properties to each part of the geometric model; and adding an electrothermal coupling solving module and a thermal coupling solving module into the geometric model, and setting parameters of the electrothermal coupling solving module and the thermal coupling solving module according to the application scene of the outlet cable trench of the transformer substation to obtain the three-dimensional multi-physical field coupling simulation model.

In one embodiment, the first acquiring module 302 is further configured to acquire a plurality of cover plate widths; the cover plate width is used for influencing gaps among the cable trench cover plates; based on the width of each cover plate, comparing distribution conditions of fluid fields and temperature fields in outlet cable trenches of the transformer substation in different test scenes to obtain the influence degree of gaps among the cable trench cover plates on average flow velocity in the trenches and the temperature of cable hot spots, and using the influence degree as first associated information; and acquiring target cover plate widths from the plurality of cover plate widths according to the first association information, wherein the target cover plate widths are used as gap parameters.

In one embodiment, the second obtaining module 303 is further configured to obtain multiple sets of candidate hole parameters; each group of alternative hole parameters comprises hole diameter information and hole distribution information; based on each group of alternative hole parameters, comparing distribution conditions of fluid fields and temperature fields in the outlet cable channels of the transformer substation under different test scenes to obtain the influence degree of the cable channel cover plate holes on average flow velocity in the channels and the cable hot spot temperature, and using the influence degree as second associated information; and acquiring a group of alternative hole parameters from the plurality of groups of alternative hole parameters according to the second association information, wherein the group of alternative hole parameters are used as hole parameters.

In one embodiment, the parameter testing module 304 is further configured to obtain a plurality of testing scenarios of the substation outgoing cable trench; under each test scene, acquiring a single-scene test result of the outgoing cable trench of the transformer substation according to the gap parameter and the hole parameter; and obtaining a heat dissipation test result according to the single-scene test result of each test scene.

In one embodiment, the parameter testing module 304 is further configured to obtain a heat dissipation condition according to an application scenario of the transformer substation outgoing cable trench; under the condition that the heat radiation test result meets the heat radiation condition, taking the gap parameter and the hole parameter as improvement parameters; the improved parameters are used for improving the heat dissipation structure of the outlet cable trench of the transformer substation.

All or part of each module in the cable duct heat dissipation testing device can be realized by software, hardware and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.

In one exemplary embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 4. The computer device includes a processor, a memory, an Input/Output interface (I/O) and a communication interface. The processor, the memory and the input/output interface are connected through a system bus, and the communication interface is connected to the system bus through the input/output interface. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an 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 of the computer equipment is used for storing the structural data of the outgoing cable pit of the transformer substation. The input/output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used for communicating with an external terminal through a network connection. The computer program, when executed by a processor, implements a method for testing heat dissipation of a cable trench.

Those skilled in the art will appreciate that the structures shown in FIG. 4 are block diagrams only and do not constitute a limitation of the computer device on which the present aspects apply, and that a particular computer device may include more or less components than those shown, or may combine some of the components, or have a different arrangement of components.

In one exemplary embodiment, a computer device is provided comprising a memory and a processor, the memory having stored therein a computer program, the processor when executing the computer program performing the steps of: according to analysis results of coupling actions among an electric field, a temperature field and a fluid field in the outlet cable trench of the transformer substation, a three-dimensional multi-physical field coupling simulation model of the outlet cable trench of the transformer substation is constructed; the three-dimensional multi-physical field coupling simulation model comprises gaps among cable channel cover plates and cable channel cover plates of the outlet cable channel of the transformer substation; acquiring first association information between gaps among cable trench cover plates and between current carrying capacity of cables in the trench according to a three-dimensional multi-physical field coupling simulation model, and determining gap parameters among the cable trench cover plates according to the first association information; acquiring second association information between holes of the cable trench cover plate and current carrying capacity of the cable in the trench according to the three-dimensional multi-physical field coupling simulation model, and determining hole parameters of the cable trench cover plate according to the second association information; and according to the gap parameters and the hole parameters, obtaining a heat dissipation test result of the outlet cable trench of the transformer substation.

In one embodiment, the processor when executing the computer program further performs the steps of: according to the geometric dimension of the outlet cable trench of the transformer substation and the arrangement condition of cables in the trench, constructing a geometric model of the outlet cable trench of the transformer substation, and adding material properties to each part of the geometric model; and adding an electrothermal coupling solving module and a thermal coupling solving module into the geometric model, and setting parameters of the electrothermal coupling solving module and the thermal coupling solving module according to the application scene of the outlet cable trench of the transformer substation to obtain the three-dimensional multi-physical field coupling simulation model.

In one embodiment, the processor when executing the computer program further performs the steps of: acquiring the widths of a plurality of cover plates; the cover plate width is used for influencing gaps among the cable trench cover plates; based on the width of each cover plate, comparing distribution conditions of fluid fields and temperature fields in outlet cable trenches of the transformer substation in different test scenes to obtain the influence degree of gaps among the cable trench cover plates on average flow velocity in the trenches and the temperature of cable hot spots, and using the influence degree as first associated information; and acquiring target cover plate widths from the plurality of cover plate widths according to the first association information, wherein the target cover plate widths are used as gap parameters.

In one embodiment, the processor when executing the computer program further performs the steps of: obtaining multiple groups of alternative hole parameters; each group of alternative hole parameters comprises hole diameter information and hole distribution information; based on each group of alternative hole parameters, comparing distribution conditions of fluid fields and temperature fields in the outlet cable channels of the transformer substation under different test scenes to obtain the influence degree of the cable channel cover plate holes on average flow velocity in the channels and the cable hot spot temperature, and using the influence degree as second associated information; and acquiring a group of alternative hole parameters from the plurality of groups of alternative hole parameters according to the second association information, wherein the group of alternative hole parameters are used as hole parameters.

In one embodiment, the processor when executing the computer program further performs the steps of: acquiring a plurality of test scenes of a transformer substation outgoing cable trench; under each test scene, acquiring a single-scene test result of the outgoing cable trench of the transformer substation according to the gap parameter and the hole parameter; and obtaining a heat dissipation test result according to the single-scene test result of each test scene.

In one embodiment, the processor when executing the computer program further performs the steps of: according to the application scene of the outgoing cable pit of the transformer substation, acquiring heat dissipation conditions; under the condition that the heat radiation test result meets the heat radiation condition, taking the gap parameter and the hole parameter as improvement parameters; the improved parameters are used for improving the heat dissipation structure of the outlet cable trench of the transformer substation.

In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of: according to analysis results of coupling actions among an electric field, a temperature field and a fluid field in the outlet cable trench of the transformer substation, a three-dimensional multi-physical field coupling simulation model of the outlet cable trench of the transformer substation is constructed; the three-dimensional multi-physical field coupling simulation model comprises gaps among cable channel cover plates and cable channel cover plates of the outlet cable channel of the transformer substation; acquiring first association information between gaps among cable trench cover plates and between current carrying capacity of cables in the trench according to a three-dimensional multi-physical field coupling simulation model, and determining gap parameters among the cable trench cover plates according to the first association information; acquiring second association information between holes of the cable trench cover plate and current carrying capacity of the cable in the trench according to the three-dimensional multi-physical field coupling simulation model, and determining hole parameters of the cable trench cover plate according to the second association information; and according to the gap parameters and the hole parameters, obtaining a heat dissipation test result of the outlet cable trench of the transformer substation.

In one embodiment, the computer program when executed by the processor further performs the steps of: according to the geometric dimension of the outlet cable trench of the transformer substation and the arrangement condition of cables in the trench, constructing a geometric model of the outlet cable trench of the transformer substation, and adding material properties to each part of the geometric model; and adding an electrothermal coupling solving module and a thermal coupling solving module into the geometric model, and setting parameters of the electrothermal coupling solving module and the thermal coupling solving module according to the application scene of the outlet cable trench of the transformer substation to obtain the three-dimensional multi-physical field coupling simulation model.

In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring the widths of a plurality of cover plates; the cover plate width is used for influencing gaps among the cable trench cover plates; based on the width of each cover plate, comparing distribution conditions of fluid fields and temperature fields in outlet cable trenches of the transformer substation in different test scenes to obtain the influence degree of gaps among the cable trench cover plates on average flow velocity in the trenches and the temperature of cable hot spots, and using the influence degree as first associated information; and acquiring target cover plate widths from the plurality of cover plate widths according to the first association information, wherein the target cover plate widths are used as gap parameters.

In one embodiment, the computer program when executed by the processor further performs the steps of: obtaining multiple groups of alternative hole parameters; each group of alternative hole parameters comprises hole diameter information and hole distribution information; based on each group of alternative hole parameters, comparing distribution conditions of fluid fields and temperature fields in the outlet cable channels of the transformer substation under different test scenes to obtain the influence degree of the cable channel cover plate holes on average flow velocity in the channels and the cable hot spot temperature, and using the influence degree as second associated information; and acquiring a group of alternative hole parameters from the plurality of groups of alternative hole parameters according to the second association information, wherein the group of alternative hole parameters are used as hole parameters.

In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring a plurality of test scenes of a transformer substation outgoing cable trench; under each test scene, acquiring a single-scene test result of the outgoing cable trench of the transformer substation according to the gap parameter and the hole parameter; and obtaining a heat dissipation test result according to the single-scene test result of each test scene.

In one embodiment, the computer program when executed by the processor further performs the steps of: according to the application scene of the outgoing cable pit of the transformer substation, acquiring heat dissipation conditions; under the condition that the heat radiation test result meets the heat radiation condition, taking the gap parameter and the hole parameter as improvement parameters; the improved parameters are used for improving the heat dissipation structure of the outlet cable trench of the transformer substation.

In one embodiment, a computer program product is provided comprising a computer program which, when executed by a processor, performs the steps of: according to analysis results of coupling actions among an electric field, a temperature field and a fluid field in the outlet cable trench of the transformer substation, a three-dimensional multi-physical field coupling simulation model of the outlet cable trench of the transformer substation is constructed; the three-dimensional multi-physical field coupling simulation model comprises gaps among cable channel cover plates and cable channel cover plates of the outlet cable channel of the transformer substation; acquiring first association information between gaps among cable trench cover plates and between current carrying capacity of cables in the trench according to a three-dimensional multi-physical field coupling simulation model, and determining gap parameters among the cable trench cover plates according to the first association information; acquiring second association information between holes of the cable trench cover plate and current carrying capacity of the cable in the trench according to the three-dimensional multi-physical field coupling simulation model, and determining hole parameters of the cable trench cover plate according to the second association information; and according to the gap parameters and the hole parameters, obtaining a heat dissipation test result of the outlet cable trench of the transformer substation.

It should be noted that, the user information (including, but not limited to, user equipment information, user personal information, etc.) and the data (including, but not limited to, data for analysis, stored data, presented data, etc.) referred to in the present application are information and data authorized by the user or sufficiently authorized by each party, and the collection, use, and processing of the related data are required to meet the related regulations.

Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the various embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like. The databases referred to in the various embodiments provided herein may include at least one of relational databases and non-relational databases. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic units, quantum computing-based data processing logic units, etc., without being limited thereto.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.

Claims

1. A method for testing heat dissipation of a cable pit, the method comprising:

according to analysis results of coupling actions among an electric field, a temperature field and a fluid field in a transformer substation outgoing cable trench, a three-dimensional multi-physical field coupling simulation model of the transformer substation outgoing cable trench is constructed; the three-dimensional multi-physical field coupling simulation model comprises gaps among cable channel cover plates and cable channel cover plates of the transformer substation outgoing cable channel;

Acquiring first association information between gaps among cable trench cover plates and current carrying capacity of cables in the trench according to the three-dimensional multi-physical field coupling simulation model, and determining gap parameters among the cable trench cover plates according to the first association information;

and acquiring a heat dissipation test result of the transformer substation outlet cable trench according to the gap parameter and the hole parameter.

2. The method according to claim 1, wherein the constructing a three-dimensional multi-physical field coupling simulation model of the transformer substation outgoing cable trench according to the analysis result of the coupling effect among the electric field, the temperature field and the fluid field in the transformer substation outgoing cable trench comprises:

constructing a geometric model of the transformer substation outgoing cable trench according to the geometric dimension of the transformer substation outgoing cable trench and the arrangement condition of cables in the trench, and adding material properties to each part of the geometric model;

and adding an electrothermal coupling solving module and a thermal coupling solving module into the geometric model, and setting parameters of the electrothermal coupling solving module and the thermal coupling solving module according to the application scene of the transformer substation outlet cable trench to obtain the three-dimensional multi-physical-field coupling simulation model.

3. The method of claim 1, wherein the obtaining first correlation information between the gap between the cable trench cover plates and the current carrying capacity of the cable in the trench according to the three-dimensional multi-physical field coupling simulation model, and determining the gap parameter between the cable trench cover plates according to the first correlation information, comprises:

based on the width of each cover plate, comparing distribution conditions of fluid fields and temperature fields in outlet cable trenches of the transformer substation in different test scenes to obtain the influence degree of gaps among the cable trench cover plates on average flow velocity in the trenches and the temperature of cable hot spots, and using the influence degree as the first associated information;

and acquiring target cover plate widths from the plurality of cover plate widths according to the first association information, and taking the target cover plate widths as the gap parameters.

4. The method of claim 1, wherein the obtaining second correlation information between the cable trench cover hole and the current carrying capacity of the cable in the trench according to the three-dimensional multi-physical field coupling simulation model, and determining hole parameters of the cable trench cover according to the second correlation information, comprises:

Based on each group of alternative hole parameters, comparing distribution conditions of fluid fields and temperature fields in the outlet cable channels of the transformer substation under different test scenes to obtain the influence degree of the cable channel cover plate holes on average flow velocity in the channels and the cable hot spot temperature, and using the influence degree as the second associated information;

and acquiring a group of alternative hole parameters from a plurality of groups of alternative hole parameters according to the second association information, and taking the group of alternative hole parameters as the hole parameters.

5. The method of claim 1, wherein the obtaining the heat dissipation test result of the substation outlet cable trench according to the gap parameter and the hole parameter comprises:

acquiring a plurality of test scenes of the transformer substation outgoing cable trench;

under each test scene, acquiring a single-scene test result of the transformer substation outgoing cable trench according to the gap parameter and the hole parameter;

and acquiring the heat dissipation test result according to the single-scene test result of each test scene.

6. The method according to claim 1, wherein the method further comprises:

according to the application scene of the transformer substation outgoing cable trench, obtaining heat dissipation conditions;

under the condition that the heat dissipation test result meets the heat dissipation condition, taking the gap parameter and the hole parameter as improvement parameters; the improvement parameters are used for improving the heat dissipation structure of the transformer substation outgoing cable trench.

7. A cable pit heat dissipation testing device, the device comprising:

the model construction module is used for constructing a three-dimensional multi-physical field coupling simulation model of the transformer substation outgoing cable trench according to analysis results of coupling actions among an electric field, a temperature field and a fluid field in the transformer substation outgoing cable trench; the three-dimensional multi-physical field coupling simulation model comprises gaps among cable channel cover plates and cable channel cover plates of the transformer substation outgoing cable channel;

the first acquisition module is used for acquiring first association information between gaps among the cable trench cover plates and the current carrying capacity of the cable in the trench according to the three-dimensional multi-physical-field coupling simulation model, and determining gap parameters among the cable trench cover plates according to the first association information;

the second acquisition module is used for acquiring second association information between the holes of the cable trench cover plate and the current carrying capacity of the cable in the trench according to the three-dimensional multi-physical-field coupling simulation model, and determining hole parameters of the cable trench cover plate according to the second association information;

8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 6 when the computer program is executed.

9. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6.

10. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6.