High-voltage cable terminal teaching model equipment integrating infrared temperature measurement and ultraviolet measurement

Abstract

The invention relates to high-voltage cable terminal teaching model equipment integrating infrared temperature measurement and ultraviolet measurement. The high-voltage cable terminal teaching model equipment comprises a high-voltage cable terminal model; the heater is arranged in the high-voltage cable terminal model and is used for simulating an abnormal heating fault; the temperature control device is used for temperature control; the high-voltage pulse generator is used for generating periodic high-voltage pulse signals, and a positive electrode and a negative electrode are connected with high-voltage wires respectively; the hollow wire outlet rod is arranged in the center of the high-voltage cable terminal model; a hollow channel is arranged in the hollow wire outlet rod and is used for arranging a high-voltage wire; and the discharge electrode is respectively connected with the high-voltage wires of the positive electrode and the negative electrode to form a discharge positive electrode and a discharge negative electrode, and the discharge positive electrode and the discharge negative electrode are both connected with the top end of the terminal model. Compared with the prior art, students can master an infrared temperature measurement technology and can also know and master an ultraviolet measurement technology, so that the monitoring capability of the students on the running state of the power cable is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-voltage cable terminal teaching equipment, in particular to a high-voltage cable terminal teaching model equipment integrating infrared temperature measurement and ultraviolet measurement. BACKGROUND

[0002] With the rapid development of the power industry, the safe operation of the power system is increasingly valued. As an important part of power transmission, the safety performance of medium and high voltage power cables is directly related to the stable operation of the power system. Therefore, it is particularly important to regularly inspect and maintain power cables. The traditional cable inspection method mainly relies on manual inspection, which is not only inefficient but also has safety hazards. In recent years, the development of non-contact temperature measurement technology has provided a new solution for the inspection of cable line equipment. Non-contact temperature measurement includes infrared temperature measurement and ultraviolet measurement technology, which can quickly and accurately obtain temperature information without directly contacting the measured object, greatly improving the efficiency and safety of inspection.

[0003] In the safe operation of medium and high voltage power cable terminals, infrared temperature measurement and ultraviolet measurement are particularly important. Commonly used medium and high voltage power cable terminals are divided into 110kV terminals, 220kV terminals, 500kV terminals, etc. according to voltage level, among which, the number of 110kV cable terminals is the largest. These high voltage level cable terminals may overheat during operation, which may lead to serious safety accidents if not timely discovered and handled. Therefore, it is necessary to effectively monitor the non-contact temperature of these cable terminals.

[0004] There are already some training devices on the market that use infrared temperature measurement for cable terminals. These devices can simulate the heating of cable terminals to help students master infrared temperature measurement technology. However, these devices can only simulate infrared heating and cannot simulate corona discharge and emit ultraviolet spectrum.

[0005] Corona is a local self-sustaining discharge of gas medium in a non-uniform electric field, which is the most common form of gas discharge. Near a sharp electrode with a large curvature radius, such as near the terminal outgoing pole, the local electric field strength exceeds the ionization field strength of the gas, causing the gas to ionize and excite, resulting in corona discharge, which is accompanied by ultraviolet radiation. Due to the small proportion of corona discharge, ultraviolet measurement devices have not been fully applied. However, once corona discharge occurs, the failure rate doubles, which must be taken seriously.

[0006] The application with the patent application number CN202010796612.1 discloses an infrared temperature measurement training device for a medium and high voltage power cable terminal based on a matrix heater. The device uses a matrix heater and a circumferential matrix assembly as the core to realize accurate control of the surface temperature points, but does not have an ultraviolet measurement function.

[0007] The application with the patent application number CN202211389690.5 discloses a corona discharge simulation method and device based on a power transmission line, equipment and medium. The method mainly simulates corona discharge based on finite element simulation, but does not have a practical operation.

[0008] The application with the patent application number CN201320125666.0 discloses an ultraviolet detection test device for simulating corona discharge. The device generates corona discharge by applying high voltage to a 110kV insulator string with defects. However, the structure and mechanism of the insulator string are different from those of the cable terminal, and they cannot be used together.

[0009] In summary, there is an urgent need to provide a high-voltage cable terminal teaching model device that can provide infrared temperature measurement and ultraviolet measurement practical operation training, so that students can not only master infrared temperature measurement technology, but also understand and master ultraviolet measurement technology. SUMMARY

[0010] The purpose of the present application is to overcome the shortcomings of the prior art and provide a high-voltage cable terminal teaching model device that integrates infrared temperature measurement and ultraviolet measurement, so that students can not only master infrared temperature measurement technology, but also understand and master ultraviolet measurement technology.

[0011] The purpose of the present application can be achieved by the following technical solutions:

[0012] A high-voltage cable terminal teaching model device that integrates infrared temperature measurement and ultraviolet measurement, comprising:

[0013] A high-voltage cable terminal model;

[0014] A heater arranged inside the high-voltage cable terminal model for forming local heating to simulate abnormal heating failure;

[0015] A temperature control device connected to the heater for temperature control;

[0016] A high-voltage pulse generator for generating a periodic high-voltage pulse signal, the positive and negative electrodes of the high-voltage pulse generator being connected with high-voltage wires respectively;

[0017] A hollow wire outlet rod arranged at the center of the high-voltage cable terminal model, the hollow wire outlet rod having a hollow channel inside for arranging the high-voltage wires;

[0018] The discharge electrode is connected with the high-voltage cable terminal model through the high-voltage pulse generator.

[0019] Further, the high-voltage cable terminal model comprises a high-voltage cable, a stress cone, a top cover and a bushing, the top cover is fixed on the top of the bushing, the hollow outgoing line rod is located in the center of the bushing, one end of the hollow outgoing line rod is connected with the high-voltage cable, and the other end penetrates through the top cover, and the stress cone is fixed on the end of the high-voltage cable.

[0020] Further, the top of the high-voltage pulse generator is connected with a metal clamp, the discharge positive electrode is connected with the metal clamp, and the hollow outgoing line rod is an insulating hollow outgoing line rod.

[0021] Further, the high-voltage cable terminal model further comprises a voltage equalizing cover, the voltage equalizing cover is connected on the top of the hollow outgoing line rod and covers the outside of the top cover.

[0022] The discharge negative electrode is connected with the top cover or the voltage equalizing cover.

[0023] Further, the outside of the bushing is provided with a shed.

[0024] Further, the discharge positive electrode is further connected with the top cover, and the discharge negative electrode is connected with the shed outside the bushing.

[0025] Further, the outside of the shed is attached with a metal film or a conductive coating.

[0026] Further, the top of the high-voltage pulse generator is connected with a metal clamp, and a heater is placed in the metal clamp.

[0027] The discharge positive electrode is connected with the top cover and is isolated from the metal clamp and the heater, and the hollow outgoing line rod is made of an insulating material.

[0028] Further, the heater is a matrix heater, a rod-shaped heater or a sheet-shaped heater.

[0029] Further, the high-voltage cable is a silicon rubber cable.

[0030] Compared with the prior art, the present application has the following advantages:

[0031] (1) Improve measurement skills: The present application sets up a hollow outgoing pole on the basis of the high-voltage cable terminal, sets up a hollow channel to introduce the discharge positive electrode and the discharge negative electrode to the top end of the high-voltage cable terminal model, forms an environment simulating corona discharge, increases the corona discharge function, and provides a training device for ultraviolet measurement for the inspection personnel. This device can simulate the corona discharge phenomenon under actual working conditions, so that the students can practice in a safe environment, thereby improving their measurement skills and accuracy.

[0032] (2) Improve comprehensive fault identification ability: The present application integrates the infrared temperature measurement simulation function and the ultraviolet measurement training function together, so that the teaching model equipment can provide infrared temperature measurement and ultraviolet measurement training functions at the same time. This multifunctional integration not only enriches the types of fault simulation, but also is closer to the real working environment, and helps to improve the comprehensive fault identification ability of the inspection training personnel. Through multiple practical operations under different conditions, the students can better understand and master various fault types and their corresponding detection methods.

[0033] (3) Enhance safety: Since corona discharge has certain danger, traditional field training has certain safety hazards. The teaching model equipment used in the present application can be carried out in a safe environment such as a laboratory or a classroom, greatly reducing the safety risk in the training process. In addition, the equipment is also equipped with necessary safety protection measures such as insulating materials and protective covers, further ensuring the safety of the operators.

[0034] (4) Significant economic benefits: Compared with the traditional field training method, using the teaching model equipment of the present application for training can significantly reduce the training cost. Since the equipment can be reused, it has a high cost performance in the long run. In addition, by improving the training effect, the cost of equipment damage and maintenance due to misjudgment of faults can be reduced, thereby further improving the economic benefits.

[0035] (5) Easy to promote and apply: The teaching model equipment of the present application has simple structure and convenient operation, and is easy to mass produce and apply. Whether it is an internal technical training center of a power company or an external vocational training institution, this equipment can be used for related skill teaching and training. In addition, with the continuous progress and improvement of technology, in the future, the equipment can be upgraded and modified according to the needs to adapt to new training needs and technical standards. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a schematic diagram of the main structure of a high-voltage cable terminal model provided in the embodiments of the present application;

[0037] Figure 2A main body structure schematic diagram of a high-voltage cable terminal model provided in an embodiment of the present application is configured with a pressure equalizing cover;

[0038] Figure 3 A corona discharge structure schematic diagram of a metal clamp and a top cover or a pressure equalizing cover provided in an embodiment of the present application is shown in the figure;

[0039] Figure 4 A corona discharge structure schematic diagram of a high electric field region to a bushing umbrella skirt provided in an embodiment of the present application is shown in the figure;

[0040] Figure 5 A scheme structure schematic diagram of a wire rod clamp heating and pressure equalizing cover corona discharge coexistence provided in an embodiment of the present application is shown in the figure;

[0041] In the figure, 1, a high-voltage cable terminal model, 101, a high-voltage cable, 102, a stress cone, 103, a top cover, 104, a bushing, 105, a metal clamp, 106, a pressure equalizing cover, 107, an umbrella skirt, 2, a heater, 3, a temperature control device, 4, a high-voltage pulse generator, 5, a hollow wire rod, 501, a hollow channel, 6, a discharge positive electrode, 7, a discharge negative electrode. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0044] It should be noted that: similar numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0045] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0046] It should be noted that the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0047] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0048] The high-voltage cable terminal is as shown in Figure 1 and Figure 2 As shown, the corona discharge of the high-voltage cable terminal mainly occurs in the process of spreading from the high electric field intensity area (such as the outgoing rod, the voltage grading shield, and the top cover) to the low electric field intensity area (such as the ground, the dirty umbrella skirt, and the grounding fitting). When the electric field intensity of these areas exceeds the breakdown threshold of air or medium, corona discharge phenomenon occurs. Corona discharge can cause burn marks in high and low electric field areas. In addition, wet weather and particulate matter in the air can increase the probability of corona discharge.

[0049] The embodiment provides a high-voltage cable terminal teaching model device integrating infrared temperature measurement and ultraviolet measurement, comprising:

[0050] The high-voltage cable terminal model 1 is, for example, a 110kV cable terminal;

[0051] The heater 2 is arranged inside the high-voltage cable terminal model 1 and is used to form local heating to simulate an abnormal heating fault;

[0052] The temperature control device 3 is connected to the heater 2 and is used to control temperature, and can be composed of a temperature sensor, a solid-state relay, and a temperature control meter;

[0053] The high-voltage pulse generator 4 is used to generate a periodic high-voltage pulse signal, and the positive and negative poles of the high-voltage pulse generator 4 are respectively connected with high-voltage wires;

[0054] The hollow outgoing line rod 5 is arranged in the center of the high-voltage cable terminal model 1; the hollow outgoing line rod 5 is internally provided with a hollow channel 501 for arranging high-voltage wires; wherein the high-voltage wires connected to the negative poles of the high-voltage wires can be led out from the outgoing line rod position and connected to the low electric field area;

[0055] The discharge electrodes are respectively connected to the high-voltage wires of the positive and negative poles of the high-voltage pulse generator 4 to form discharge positive electrodes 6 and discharge negative electrodes 7, and the discharge positive electrodes 6 and the discharge negative electrodes 7 are both connected to the top end of the high-voltage cable terminal model 1; after being driven by the high-voltage pulse generator 4, corona discharge and ultraviolet radiation are generated.

[0056] Specifically, the high-voltage cable terminal model 1 includes a high-voltage cable 101, a stress cone 102, a top cover 103, and a sleeve 104, the top cover 103 is fixed at the top of the sleeve 104, the hollow outgoing line rod 5 is located in the center of the sleeve 104, one end of the hollow outgoing line rod 5 is connected to the high-voltage cable 101, the other end penetrates through the top cover 103, and the stress cone 102 is fixed at the end of the high-voltage cable 101.

[0057] The following describes various methods for simulating corona discharge of the high-voltage cable terminal teaching model device integrated with infrared temperature measurement and ultraviolet measurement:

[0058] Embodiment 1

[0059] The electrode connection form of the high-voltage pulse generator:

[0060] In order to simulate the corona discharge in the high electric field area, the positive and negative electrodes of the high-voltage pulse generator 4 are led out from the hollow outgoing line rod 5 by high-voltage corona-resistant wires (such as silicone rubber wires) until the top end of the high-voltage cable terminal model 1. The positive and negative electrodes are respectively connected to the positive and negative discharge electrodes, thereby forming an environment for simulating corona discharge.

[0061] Embodiment 2

[0062] The form of corona discharge of the metal clamp to the top cover or the voltage equalizing cover:

[0063] The high-voltage pulse generator 4 is connected with a metal clamp 105 at the top;

[0064] The high-voltage cable terminal model 1 further includes a voltage equalizing cover 106, which is connected to the top of the hollow outgoing line rod 5 and covers the outside of the top cover 103;

[0065] As Figure 3As shown, to more accurately simulate the corona discharge phenomenon, the positive discharge electrode 6, connected to the positive terminal of the high-voltage pulse generator 4, can be connected to the metal clamp 105 at the top of the hollow outlet rod 5, while the negative discharge electrode 7 can be connected to the top cover 103 or the equalizing cover 106 at the top of the terminal. In this case, an insulated hollow outlet rod 5 is needed to replace the original metal outlet rod to ensure safe and effective corona discharge simulation.

[0066] Example 3

[0067] Corona discharge patterns of the bushing skirt in high electric field regions:

[0068] The outer side of the sleeve 104 is provided with a skirt 107.

[0069] like Figure 4 As shown, further, the positive electrode of the high-voltage pulse generator 4 can be connected to the metal clamp 105, the top cover 103, and the equalizing cover 106 at the top of the outlet rod, so that these high electric field regions are all positive discharge electrodes. At the same time, the negative electrode is connected to the shed 107 of the terminal bushing, forming a corona discharge of the high electric field region onto the bushing shed. Similarly, at this time, an insulated hollow outlet rod 5 is needed to replace the original metal hollow outlet rod 5.

[0070] Example 4

[0071] Variations in the discharge object with additional accessories:

[0072] To facilitate the replacement of vulnerable parts and ensure long-term use, a thin metal film or conductive coating can be applied to the skirt 107 connected to the negative electrode. This transforms the discharge target into an external accessory, rather than directly damaging the skirt 107 itself. This method not only extends the lifespan of the equipment but also reduces maintenance costs.

[0073] Example 5

[0074] A solution that combines heating of pole clamps with corona discharge of equalizing shroud:

[0075] like Figure 5 As shown, a heater 2 is placed inside a metal clamp 105 at the top of the hollow outlet rod 5. The positive electrode of the high-voltage generator is connected to the equalizing cover heater 2 and the top cover 103 to form a corona discharge positive electrode, which is isolated from the heater 2 and the metal clamp 105. The hollow outlet rod 5 is made of insulating material. This allows it to simultaneously provide heating and corona discharge functions, corresponding to simulated infrared temperature measurement training and ultraviolet measurement training, respectively.

[0076] The heater 2 can take the form of, but is not limited to, matrix heaters, rod heaters, and plate heaters.

[0077] In conclusion, the high-voltage cable terminal teaching model device provided by the scheme can provide infrared temperature measurement and ultraviolet measurement practical operation and practical training, and the hollow type outgoing line rod on the terminal is integrated with the ultraviolet light emitting device on the basis of the infrared temperature measurement practical training cable terminal teaching model, so as to achieve the teaching effect on students. Through this way, students can not only master the infrared temperature measurement technology, but also understand and master the ultraviolet measurement technology, so as to improve their monitoring ability of the operation state of power cables.

[0078] The preferred embodiments of the present application are described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and changes without creative work based on the concept of the present application. Therefore, any technical solutions obtained by logical analysis, reasoning or limited experiments based on the prior art within the concept of the present application should be within the protection scope determined by the claims.

Claims

1. A high-voltage cable terminal teaching model device integrating infrared temperature measurement and ultraviolet measurement, characterized in that, include: High-voltage cable terminal model (1); Heater (2) is arranged inside the high-voltage cable terminal model (1) to generate local heating and simulate abnormal heating fault; Temperature control device (3), connected to heater (2), used for temperature control; A high-voltage pulse generator (4) is used to generate periodic high-voltage pulse signals. The positive and negative terminals of the high-voltage pulse generator (4) are respectively connected to high-voltage wires. A hollow cable outlet rod (5) is set at the center of the high-voltage cable terminal model (1); the hollow cable outlet rod (5) has a hollow channel (501) inside for arranging the high-voltage conductor; The discharge electrodes are connected to the high-voltage wires of the positive and negative terminals of the high-voltage pulse generator (4) to form a discharge positive electrode (6) and a discharge negative electrode (7). The discharge positive electrode (6) and the discharge negative electrode (7) are both connected to the top of the high-voltage cable terminal model (1).

2. The high-voltage cable terminal teaching model device integrating infrared temperature measurement and ultraviolet measurement according to claim 1, characterized in that, The high-voltage cable terminal model (1) includes a high-voltage cable (101), a stress cone (102), a top cover (103), and a sleeve (104). The top cover (103) is fixed to the top of the sleeve (104). The hollow outlet rod (5) is located at the center of the sleeve (104). One end of the hollow outlet rod (5) is connected to the high-voltage cable (101), and the other end passes through the top cover (103). The stress cone (102) is fixed to the end of the high-voltage cable (101).

3. The high-voltage cable terminal teaching model device integrating infrared temperature measurement and ultraviolet measurement according to claim 2, characterized in that, The top of the high voltage pulse generator (4) is connected to a metal clamp (105), the discharge positive electrode (6) is connected to the metal clamp (105), and the hollow outlet rod (5) is an insulated hollow outlet rod (5).

4. The high-voltage cable terminal teaching model device integrating infrared temperature measurement and ultraviolet measurement according to claim 3, characterized in that, The high-voltage cable terminal model (1) also includes a pressure equalization cover (106), which is connected to the top of the hollow outlet rod (5) and covers the outside of the top cover (103); The discharge negative electrode (7) is connected to the top cover (103) or the equalizing cover (106).

5. The high-voltage cable terminal teaching model device integrating infrared temperature measurement and ultraviolet measurement according to claim 3, characterized in that, The sleeve (104) is provided with a skirt (107) on the outside.

6. The high-voltage cable terminal teaching model device integrating infrared temperature measurement and ultraviolet measurement according to claim 5, characterized in that, The positive discharge electrode (6) is also connected to the top cover (103), and the negative discharge electrode (7) is connected to the umbrella skirt (107) on the outside of the sleeve (104).

7. The high-voltage cable terminal teaching model device integrating infrared temperature measurement and ultraviolet measurement according to claim 6, characterized in that, The outer side of the umbrella skirt (107) is covered with a metal film or conductive coating.

8. The high-voltage cable terminal teaching model device integrating infrared temperature measurement and ultraviolet measurement according to claim 2, characterized in that, The top of the high-voltage pulse generator (4) is connected to a metal clamp (105), and a heater (2) is placed inside the metal clamp (105); The discharge positive electrode (6) is connected to the top cover (103) and isolated from the metal clamp (105) and the heater (2); the hollow outlet rod (5) is made of insulating material.

9. The high-voltage cable terminal teaching model device integrating infrared temperature measurement and ultraviolet measurement according to claim 1, characterized in that, The heater (2) is a matrix heater, a rod heater, or a plate heater.

10. A high-voltage cable terminal teaching model device integrating infrared temperature measurement and ultraviolet measurement according to claim 1, characterized in that, The high-voltage conductor is a silicone rubber conductor.

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