Simulation system and simulation method for igniting high-voltage power cable by electric arc

Abstract

The invention provides a simulation system and simulation method for igniting a high-voltage power cable by an electric arc, and the simulation system comprises a control module, the signal output end of the control module is connected with a conversion module, the conversion module can carry out the data conversion of an input command, and the signal output end of the conversion module is connected with a physical model building module. Two-dimensional and / or three-dimensional model establishment can be carried out on the cable and the arc generation device through the physical model establishment module, the signal output end of the physical model establishment module is connected with the processing module, operation processing can be carried out on model data through the processing module, and the signal output end of the processing module is connected with the demonstration module. And the data is transmitted to the demonstration module through the processing module, so that the demonstration module carries out arc ignition demonstration based on the established model. According to the invention, the thermal behavior and combustion of the cable under the action of the electric arc are accurately simulated, the stability and accuracy of the calculation result are improved, and a rapid and accurate tool is provided for cable fault diagnosis and risk assessment.

Description

Technical Field

[0001] The present disclosure relates to the technical field of arc burning simulation, and in particular to a simulation system and method for arc ignition of a high-voltage power cable. Background Art

[0002] Fire prevention and control in cable channels is an important foundation for the safe construction of cable channels. Cable fire is one of the most dangerous fires in cable channels. In recent years, fire accidents caused by cable faults have occurred frequently in China, especially in places close to equipment such as thermal power plants and substations. The spread of fire often causes equipment shutdown or damage. The speed of open flame propagation on the cable can reach 20m / min, accompanied by a large amount of high-heat toxic smoke, such as carbon monoxide and hydrogen chloride. The large amount of smoke generated by cable burning spreads to other places, which can cause people to suffocate instantly and die of poisoning, resulting in casualties and property losses.

[0003] In real life, electric arcs are the main reason for igniting equipment in cable ducts, especially high-voltage power cables. At the same time, the electric field generated by the arc will promote the burning and spread of the flame, making the fire further worse. Therefore, a clear understanding of the mechanism of arc ignition of high-voltage power cables is an important topic for proposing fire extinguishing measures for cable ducts. At present, the research on arc ignition of high-voltage power cables is mainly experimental research. However, due to restrictions such as fire safety, the experiment needs to be carried out in specific circumstances, which makes the experimental method subject to many restrictions. Summary of the invention

[0004] In view of this, the present disclosure aims to provide a simulation system and a simulation method for arc ignition of high-voltage power cables to solve the above-mentioned technical problems in the prior art.

[0005] One aspect of the present disclosure provides a simulation system for arc ignition of high-voltage power cables, including a control module arranged on a computer, wherein a signal output end of the control module is connected to a conversion module, through which an input command can be converted into data, a signal output end of the conversion module is connected to a physical model establishment module, through which a two-dimensional and / or three-dimensional model of a cable and an arc generating device can be established, a signal output end of the physical model establishment module is connected to a processing module, through which model data can be processed, a signal output end of the processing module is connected to a demonstration module, through which data is transmitted to the demonstration module so that the demonstration module performs an arc ignition demonstration based on the established model.

[0006] In some embodiments, the control module includes an operation module and a command module that are interconnected. The operation module can be used to perform modeling operations on the physical model building module, and the command module can be used to input and modify model parameters.

[0007] In some embodiments, the physical model building module includes a rendering module and a material module that are interconnected. The physical model building module can render and assign materials to the built model through the rendering module and the material module.

[0008] In some embodiments, a signal input terminal of the physical model building module is connected to a signal output terminal of a server, and the physical model building module can obtain material information through a database of the server.

[0009] In some embodiments, the signal input terminal signal of the processing module is connected to the server, and the processing module includes a calculation module, a comparison module and an analysis module. The processing module can compare and analyze the data through the comparison module and the analysis module based on the database in the server, and perform calculations on the data through the calculation module.

[0010] In some embodiments, the signal output end of the operation module is connected to the error correction module, the signal output end of the error correction module is connected to the alarm module, the signal output end of the alarm module is connected to the signal input end of the computer, the error correction module can proofread the operation in the operation module and transmit the data to the alarm module, and the alarm module can transmit the error alarm information to the computer.

[0011] In some embodiments, the signal output ends of the physical model building module, the alarm module, the processing module and the demonstration module are connected to a storage module, and the signal output end of the storage module is connected to the signal input end of the computer, so that data can be stored through the storage module.

[0012] Another aspect of the present disclosure provides a method for simulating arc ignition of a high-voltage power cable, which is applicable to any of the above-mentioned simulation systems for arc ignition of a high-voltage power cable, comprising:

[0013] Create 2D and / or 3D models of cables and arc generating devices;

[0014] Rendering and assigning materials to the model;

[0015] obtaining a simulation target value based on the processed model;

[0016] Calculations are performed based on the processed model to achieve the demonstration of the plasma arc.

[0017] In some embodiments, rendering the model and assigning material also includes: adjusting the structure and model parameters of the cable model.

[0018] In some embodiments, the demonstration of performing calculations based on the processed model to achieve a plasma arc further includes: calibrating the calculations and issuing an alarm for false alarm information.

[0019] The disclosed embodiments construct two-dimensional and three-dimensional models for describing cable combustion, accurately simulate the thermal behavior and combustion of cables under the action of electric arcs, improve the stability and accuracy of calculation results, and can also demonstrate arc ignition of the established cable model, thereby providing a fast and accurate tool for cable fault diagnosis and risk assessment.

[0020] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In the drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the disclosed embodiments. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method. The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of this application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation of the present disclosure. In the drawings:

[0022] Figure 1 This is a structural schematic diagram of a simulation system for arc ignition of a high-voltage power cable provided by an embodiment of the present disclosure;

[0023] Figure 2 This is the second structural schematic diagram of the simulation system for arc ignition of high-voltage power cables provided by the embodiment of the present disclosure;

[0024] Figure 3 This is the second structural schematic diagram of the simulation system for arc ignition of high-voltage power cables provided by the embodiment of the present disclosure;

[0025] Figure 4 It is a schematic diagram of the steps of a simulation method for arc ignition of a high-voltage power cable provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings, but are not intended to limit the present disclosure.

[0027] It should be understood that various modifications may be made to the embodiments disclosed herein. Therefore, the above description should not be considered as limiting, but merely as an example of an embodiment. Other modifications within the scope and spirit of the present disclosure will occur to those skilled in the art.

[0028] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the general description of the present disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the present disclosure.

[0029] These and other characteristics of the present disclosure will become apparent from the following description of a preferred form of embodiment given as a non-limiting example, with reference to the attached drawings.

[0030] It should also be understood that, although the present disclosure has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present disclosure that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0031] The above and other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0032] Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are merely examples of the present disclosure, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid obscuring the present disclosure with unnecessary or redundant details. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of ways with substantially any suitable detailed structure.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0034] This specification may use the phrases "in one embodiment," "in another embodiment," "in a further embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present disclosure.

[0035] The first embodiment of the present disclosure provides a simulation system for arc ignition of high-voltage power cables, such as Figure 1-Figure 3 As shown, it is arranged in, for example, a computer 100, and the simulation system includes a control module 1, a signal output end of the control module 1 is connected to a conversion module 2, through which the command input by the experimenter on the computer 100 can be converted into data, a signal output end of the conversion module 2 is connected to a physical model establishment module 3, through which the experimenter can establish a two-dimensional and / or three-dimensional model of the cable and the arc generating device, a signal output end of the physical model establishment module 3 is connected to a processing module 4, the processing module 4 can perform calculation processing on the model data of the physical model establishment module 3, a signal output end of the processing module 4 is connected to a demonstration module 5, and the processing module 4 transmits data to the demonstration module 5 so that the demonstration module 5 can demonstrate arc ignition on the established model, so that the experimenter can view the arc ignition data and model more clearly.

[0036] Furthermore, the control module 1 includes an operation module 11 and a command module 12 that are interconnected. The experimenter can perform modeling operations on the physical model building module 3 through the operation module 11, so that the experimenter can model the cable more smoothly. The experimenter can input and modify model parameters of the model built by the physical model building module 3 through the command module 12.

[0037] Furthermore, the signal input end signal of the processing module 4 is connected to the server 200, and the processing module 4 includes a calculation module 41, a comparison module 42 and an analysis module 43. The processing module 4 can compare and analyze the data through the comparison module 42 and the analysis module 43 based on the database in the server 200, and perform calculations on the data through the calculation module 41.

[0038] Furthermore, the signal output end of the operation module 41 is connected to the error correction module 6, the signal output end of the error correction module 6 is connected to the alarm module 7, and the signal output end of the alarm module 7 is connected to the signal input end of the computer 100. The operation in the operation module 41 can be proofread by the error correction module 6, and the error correction module 6 transmits data to the alarm module 7, and the error alarm information is transmitted to the computer 100 by the alarm module 7 so that the experimenter can know the alarm information in time.

[0039] Furthermore, the physical model establishment module 3 includes a rendering module 31 and a material module 32 that are interconnected. The physical model establishment module 4 can render and assign materials to the constructed model through the rendering module 31 and the material module 32. At the same time, the signal input end of the physical model establishment module 3 is connected to the signal output end of the server 200. The physical model establishment module 3 can obtain a variety of material information through the database of the server 200.

[0040] In the embodiment of the present disclosure, the physical model building module can be operated through the operation module, so that the experimenter can more smoothly perform two-dimensional and three-dimensional modeling of the cable. The experimenter can modify and input the parameters of the physical model building module through the command module.

[0041] In addition, during the model building process, the embodiment of the present disclosure allows the test personnel to adjust the size and specifications of the cable model, so that the test personnel can demonstrate a variety of data and make the data of arc ignition of high-voltage power cables more comprehensive, allowing the test personnel to perform test operations more smoothly.

[0042] Furthermore, the signal output ends of the physical model building module 3, the alarm module 7, the processing module 4 and the demonstration module 5 are connected to the storage module 8, and the signal output end of the storage module 8 is connected to the signal input end of the computer 100. The data can be stored through the storage module 8 so that the experimenter can view the data.

[0043] The disclosed embodiments construct two-dimensional and three-dimensional models for describing cable combustion, accurately simulate the thermal behavior and combustion of cables under the action of electric arcs, improve the stability and accuracy of calculation results, and can also demonstrate arc ignition of the established cable model, thereby providing a fast and accurate tool for cable fault diagnosis and risk assessment.

[0044] The second embodiment of the present disclosure provides a method for simulating arc ignition of a high-voltage power cable, which uses the simulation system for simulating arc ignition of a high-voltage power cable in the first embodiment, such as Figure 4 As shown, the simulation method includes the following specific operation steps:

[0045] S101, establishing a two-dimensional and / or three-dimensional model of the cable and the arc generating device.

[0046] In this step, a two-dimensional and / or three-dimensional model of the cable and the arc generating device is established. Specifically, based on the existing real data, the test personnel use a computer to enable the computer to establish a three-dimensional and two-dimensional model of the cable and the arc generating device through the control module 1, the conversion module 2 and the physical model establishment module 3; the cable here is ignited by the plasma arc generated by the arc generating device.

[0047] S102, rendering the model and assigning material.

[0048] After the two-dimensional and / or three-dimensional model of the cable and the arc generating device is established through the above step S101, in this step, the model is rendered and given a material. Specifically, the physical model establishment module is controlled by the operation module, so that the physical model establishment module renders and gives a material to the cable model through the rendering module and the material module.

[0049] S103, obtaining a simulation target value based on the processed model.

[0050] After rendering and assigning materials to the model in the above step S102, in this step, the simulation target value is obtained based on the processed model. Specifically, the command data output by the command module 12 is converted by the conversion module 2 and transmitted to the physical model establishment module 3, and the physical model establishment module 3 modifies the model data, and at the same time transmits the data to the processing module 4 through the physical model establishment module 3, and the processing module 4 performs calculation processing on the data through the calculation module 41, the comparison module 42 and the analysis module 43, and specifically obtains the following simulation target values:

[0051] Specifically determine the reactance of the cable as:

[0052]

[0053] Where: L—cable inductance per unit length H / m; ω=2πf.

[0054] The impedance of the cable is further determined as:

[0055]

[0056] Where: R is the effective AC resistance per unit length of cable in Ω / m.

[0057] The voltage drop of the cable is further determined as:

[0058] ΔU=IZL

[0059] Where: I—conductor current A; L—cable length m;

[0060] Finally, the arc energy calculation formula is determined:

[0061] E=0.5·C·U·I·T

[0062] Where: E represents arc energy; C is the correction coefficient; U is voltage; I is current; T is duration; the correction coefficient C here is adjusted according to the specific situation and usually takes a value between 0.1 and 1.

[0063] S104, performing calculations based on the processed model to achieve the demonstration of the plasma arc.

[0064] After obtaining the simulation target value based on the processed model in the above step S103, in this step, calculation is performed based on the processed model to realize the demonstration of the plasma arc. Specifically, the demonstration module 5 is controlled by the operation module 41, so that the cable model is ignited by the plasma arc generated by the arc generating device, and the model data of the cable and the arc generating device established by the physical model establishment module 3 is transmitted to the processing module 4 for processing. After the data is processed by the processing module 4, it is transmitted to the demonstration module 5 for demonstration, and the operator can view the demonstration data through the computer 100;

[0065] In addition, the data of the physical model building module 3, the alarm module 7, the processing module 4 and the demonstration module 5 can also be stored through the storage module 8, so that the experimenter can view the data.

[0066] In another embodiment, based on the above steps, i.e., S101, a two-dimensional and / or three-dimensional model of the cable and the arc generating device is established; S102, the model is rendered and assigned with material; S103, the simulation target value is obtained based on the processed model; S104, the demonstration of the plasma arc is improved based on the processed model.

[0067] Specifically, in step S102, it further includes: adjusting the structure and model parameters of the cable model. Specifically, the test personnel controls the physical model building module 3 to adjust the size, specification, cable sheath layer, cable insulation layer, cable conductor, etc. of the cable model through the control module 1 according to the data. In this way, through the test personnel's adjustment of the size and specification of the cable model, the test personnel can demonstrate a variety of data, and make the data of the arc ignition high-voltage power cable more comprehensive, so that the test personnel can perform the test operation more smoothly.

[0068] Furthermore, in step S104, it further includes: checking the operation and giving an alarm for the error alarm information. Specifically, the operation of the operation module 41 can be checked by the error correction module 6, and the data is transmitted to the alarm module 7 by the error correction module 6, and the error alarm information is transmitted to the computer 100 by the alarm module 7 so that the test personnel can know the alarm information in time.

[0069] The disclosed embodiments construct two-dimensional and three-dimensional models for describing cable combustion, accurately simulate the thermal behavior and combustion of cables under the action of electric arcs, improve the stability and accuracy of calculation results, and can also demonstrate arc ignition of the established cable model, thereby providing a fast and accurate tool for cable fault diagnosis and risk assessment.

[0070] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0071] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0072] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0073] In the embodiments provided in the present application, it should be understood that the disclosed devices / terminal equipment and methods can be implemented in other ways. For example, the device / terminal equipment embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0074] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0075] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0076] If the integrated module is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned motor torque control method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0077] In addition, the features of the embodiments shown in the drawings of the present application or the various embodiments mentioned in this specification are not necessarily understood as independent embodiments. Instead, each feature described in one example of an embodiment can be combined with one or more other desired features from other embodiments to produce other embodiments not described in words or with reference to the drawings.

[0078] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A simulation system for arc ignition of high-voltage power cables, characterized in that: The invention comprises a control module arranged on a computer, wherein a signal output end of the control module is connected to a conversion module, through which an input command can be converted into data, a signal output end of the conversion module is connected to a physical model establishment module, through which a two-dimensional and / or three-dimensional model of a cable and an arc generating device can be established, a signal output end of the physical model establishment module is connected to a processing module, through which model data can be processed, a signal output end of the processing module is connected to a demonstration module, through which data is transmitted to the demonstration module so that the demonstration module performs an arc ignition demonstration based on the established model.

2. The simulation system according to claim 1, characterized in that The control module includes an operation module and a command module which are connected to each other. The operation module can be used to perform modeling operations on the physical model building module, and the command module can be used to input and modify model parameters.

3. The simulation system according to claim 2, characterized in that: The physical model building module includes a rendering module and a material module which are connected to each other. The physical model building module can render and assign material to the built model through the rendering module and the material module.

4. The simulation system according to claim 3, characterized in that: The signal input end of the physical model building module is connected to the signal output end of the server, and the physical model building module can obtain material information through the database of the server.

5. The simulation system according to claim 4, characterized in that: The signal input terminal signal of the processing module is connected to the server. The processing module includes a calculation module, a comparison module and an analysis module. The processing module can compare and analyze the data through the comparison module and the analysis module based on the database in the server, and calculate the data through the calculation module.

6. The simulation system according to claim 5, characterized in that: The signal output end of the operation module is connected to the error correction module, the signal output end of the error correction module is connected to the alarm module, the signal output end of the alarm module is connected to the signal input end of the computer, the error correction module can be used to proofread the operation in the operation module and transmit the data to the alarm module, and the alarm module can transmit the error alarm information to the computer.

7. The simulation system according to claim 6, characterized in that: The signal output ends of the physical model building module, the alarm module, the processing module and the demonstration module are connected to a storage module, and the signal output end of the storage module is connected to the signal input end of the computer, so that data can be stored through the storage module.

8. A method for simulating arc ignition of a high-voltage power cable, which is applicable to the simulation system for arc ignition of a high-voltage power cable according to any one of claims 1 to 7, characterized in that: include: Create 2D and / or 3D models of cables and arc generating devices; Rendering and assigning materials to the model; obtaining a simulation target value based on the processed model; Calculations are performed based on the processed model to achieve the demonstration of the plasma arc.

9. The simulation method according to claim 8, characterized in that: The rendering and assigning of material to the model also includes: adjusting the structure and model parameters of the cable model.

10. The simulation method according to claim 8, characterized in that: In the demonstration of performing calculations based on the processed model to realize plasma arc, it also includes: proofreading the calculations and giving an alarm for false alarm information.

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