Insulating medium discharge stream form observation device

Abstract

The invention discloses a form observation device for an insulating medium discharge stream. The form observation device comprises a columnar cavity, the conductive assembly is arranged at the top end of the columnar cavity and penetrates through a top cover of the columnar cavity; the top end of the conductive assembly is connected with an impulse voltage generator. The discharge electrode is connected with the bottom end of the conductive component; the grounding polar plate is arranged at the inner bottom of the columnar cavity; the at least three camera devices are arranged around the periphery of the columnar cavity and are used for acquiring images in the columnar cavity; wherein the optical axes of any two camera devices are not parallel to each other. According to the observation device, the image of the discharge stream of the insulating medium can be acquired more comprehensively, and a more comprehensive and reliable data basis is provided for subsequent further analysis of the form and path of the discharge stream.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment insulation technology, and in particular to a device for observing the morphology of discharge current beams in insulating media. Background Technology

[0002] The insulation performance of large-scale power equipment is significantly affected by discharge faults such as partial discharge, surface flashover, and lightning impulse discharge. Among these, streamer discharge generated under lightning or switching impulse voltages is one of the main causes of insulation failure. Its transient overvoltage can lead to equipment breakdown, seriously endangering the safety of power equipment and even the power grid. If these faults are not detected and handled in a timely manner, they may lead to major dangerous accidents such as power outages or even explosions, causing serious social impact and economic losses.

[0003] Operational data shows that 80% of transformer failures are caused by insulation degradation, one of the main causes of which is impulse discharge faults. Therefore, good insulation performance is the primary prerequisite for the safe and long-term operation of power equipment. Streaming is a crucial indicator of the performance of liquid dielectrics, influencing their breakdown strength. It is a common discharge phenomenon occurring during high-voltage power transmission and internal transformer discharges. To ensure the safe and stable operation of large-scale power equipment, it is urgent to conduct morphological observation and analysis experiments on impulse discharge streams, providing key experimental data and theoretical support for the analysis of insulation performance failures and the elucidation of the physical mechanisms for performance improvement of high-end components. Summary of the Invention

[0004] The purpose of this invention is to provide a device for observing the morphology of discharge current beams in insulating media, which can acquire images of discharge current beams in insulating media more comprehensively, providing more comprehensive and reliable data for further analysis of the morphology and path of discharge current beams.

[0005] To solve the above-mentioned technical problems, the present invention provides a device for observing the morphology of discharge current beams in insulating media, comprising:

[0006] A cylindrical cavity; a conductive component disposed at the top of the cylindrical cavity and penetrating the top cover of the cylindrical cavity; an impulse voltage generator connected to the top of the conductive component; a discharge electrode connected to the bottom of the conductive component; a grounding plate disposed at the bottom of the inner side of the cylindrical cavity; at least three imaging devices disposed around the outer periphery of the cylindrical cavity for image acquisition of the interior of the cylindrical cavity; wherein the optical axes of any two of the imaging devices are not parallel to each other.

[0007] In an optional embodiment of this application, an auxiliary reflector corresponding to each of the camera devices is further included; the auxiliary reflector and the corresponding camera device are respectively disposed on opposite sides of the columnar cavity, and the optical axis of the camera device is perpendicular to the reflective surface of the auxiliary reflector.

[0008] In one optional embodiment of this application, each of the camera devices and the auxiliary reflector are mounted on a lifting support frame, and / or the columnar cavity is mounted on a lifting platform.

[0009] In an optional embodiment of this application, the side wall of the cylindrical cavity is provided with a first light-transmitting window corresponding to each of the camera devices, and a second light-transmitting window is provided corresponding to each of the auxiliary reflectors;

[0010] Each of the aforementioned camera devices has its camera lens attached to the corresponding first light-transmitting window; the auxiliary reflector is attached to the corresponding second light-transmitting window.

[0011] In an optional embodiment of this application, a U-shaped limiting groove for supporting the camera device is provided on the outer wall of the columnar cavity corresponding to each of the first light-transmitting windows; the U-shaped limiting groove extends sequentially from one side of the first light-transmitting window to the bottom edge and the other side.

[0012] The auxiliary reflector is a reflective lens;

[0013] A limiting plate is provided on the columnar cavity corresponding to each of the second light-transmitting windows and with a gap between them, for securing the reflective lens between the second light-transmitting window and the limiting plate.

[0014] In one optional embodiment of this application, the auxiliary reflector is a reflective film layer attached to the outer surface of the second light-transmitting window.

[0015] In one optional embodiment of this application, three camera devices are provided; the cylindrical cavity is a regular hexagonal prism, and the three camera devices are respectively positioned facing three mutually spaced sides of the cylindrical cavity.

[0016] In one optional embodiment of this application, the columnar cavity is a glass fiber insulating tube;

[0017] The volume of the cylindrical cavity is 100L~110L; the inner height of the cylindrical cavity is 300mm~320mm.

[0018] In one alternative embodiment of this application, the discharge electrode is connected to the conductive component via a telescopic connector.

[0019] In one optional embodiment of this application, the discharge electrode is a tungsten alloy electrode;

[0020] The discharge electrode includes at least one of the following: a needle tip electrode, a spherical electrode, and a flat plate electrode; wherein the needle tip electrode has a tip curvature radius of 50μm-100μm; the spherical electrode has a diameter of 15mm-50mm; and the flat plate electrode has a side length of 15mm-50mm.

[0021] The grounding electrode is a round copper plate with a diameter of 18cm to 22cm.

[0022] The morphological observation device for the discharge current beam of the insulating medium provided by the present invention includes a cylindrical cavity; a conductive component disposed at the top of the cylindrical cavity and penetrating the top cover of the cylindrical cavity; an impulse voltage generator connected to the top of the conductive component; a discharge electrode connected to the bottom of the conductive component; a grounding electrode plate disposed at the bottom of the inner side of the cylindrical cavity; and at least three imaging devices disposed around the outer periphery of the cylindrical cavity for image acquisition of the interior of the cylindrical cavity; wherein the optical axes of any two imaging devices are not parallel to each other.

[0023] In this application, a cylindrical cavity serves as a container for the insulating medium, providing an isolated space that isolates the insulating medium from the external environment, allowing for the formation of a discharge current beam. A discharge electrode and a grounding electrode are respectively positioned at the top and bottom of the cylindrical cavity, and the discharge electrode is connected to an external impulse voltage generator via a conductive component. Thus, when the insulating medium is injected into the cylindrical cavity, but does not cover the space between the discharge electrode and the grounding plate, a high-voltage circuit is applied to the discharge electrode via the conductive component and the impulse voltage generator, forming a discharge current beam between the discharge electrode and the grounding plate. Furthermore, this application further surrounds the cylindrical cavity with at least three imaging devices, with the optical axes of any two cameras being non-parallel. This allows for the acquisition of images of the discharge current beam from at least three different angles, providing more comprehensive and reliable data for further analysis of the beam's morphology and path. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1This is a schematic diagram of the structure of the morphological observation device for the discharge current beam of the insulating medium provided in the embodiments of this application;

[0026] Figure 2 This is a schematic cross-sectional view of the columnar cavity provided in an embodiment of this application;

[0027] Figure 3 A schematic diagram showing the relative positions of the needle tip electrode and the ground electrode provided in an embodiment of this application;

[0028] Figure 4 A schematic diagram showing the relative positions of the spherical electrode and the grounding electrode provided in an embodiment of this application;

[0029] Figure 5 A schematic diagram showing the relative positions of the flat plate electrode and the grounding electrode provided in an embodiment of this application;

[0030] Figure 6 A schematic diagram of a columnar cavity provided in an embodiment of this application;

[0031] In the attached diagram: 1 is a cylindrical cavity, 10 is a top cover, 11 is a first light-transmitting window, 111 is a U-shaped limiting slot, 12 is a second light-transmitting window, 121 is a limiting plate, 2 is a conductive component, 21 is a high-voltage bushing, 210 is a rod-shaped conductive component, 22 is an equalizing ring, 3 is a discharge electrode, 4 is a grounding plate, 5 is a camera device, 6 is an auxiliary reflector, 71 is a lifting platform, and 72 is a lifting support frame. Detailed Implementation

[0032] The core of this invention is to provide a device for observing the morphology of discharge current beams in insulating media, which can more comprehensively collect morphological information of discharge current beams in insulating media, providing reliable data for further analysis of discharge current beams.

[0033] To enable those skilled in the art to better understand the present invention, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] like Figures 1 to 2 As shown, Figure 1 This is a schematic diagram of the structure of the morphological observation device for the discharge current beam of the insulating medium provided in the embodiments of this application; Figure 2 This is a schematic cross-sectional view of the columnar cavity provided in an embodiment of this application.

[0035] In one specific embodiment of this application, the morphological observation device for the discharge current beam of the insulating medium may include:

[0036] A cylindrical cavity 1; a conductive component 2 disposed at the top of the cylindrical cavity 1 and penetrating the top cover 10 of the cylindrical cavity 1; an impulse voltage generator connected to the top of the conductive component 2; a discharge electrode 3 connected to the bottom of the conductive component 2; a grounding plate 4 disposed at the bottom of the inner side of the cylindrical cavity 1; at least three camera devices 5 disposed around the outer periphery of the cylindrical cavity 1 for image acquisition of the interior of the cylindrical cavity 1; wherein the optical axes of any two camera devices 5 are not parallel to each other.

[0037] like Figure 1 and Figure 2 As shown, the cylindrical cavity 1 in this embodiment can be a regular polygonal prism-shaped cavity or a cylindrical structure; this application does not specifically limit this. Furthermore, the cylindrical cavity 1 in this embodiment can be made of glass fiber insulating tubing, which can withstand 1000kV impulse discharge and provides isolation from air temperature, humidity, and air pressure. In addition, the cylindrical cavity 1 also serves as a container for holding the insulating medium; therefore, the volume of the cylindrical cavity should not be too small, and can be between 100L and 110L, and the inner height of the cylindrical cavity can be between 300mm and 320mm to ensure sufficient discharge space between the discharge electrode 3 and the grounding plate 4. In addition, a drain hole for discharging insulating medium (generally liquid insulating oil) can be provided at the bottom of the columnar cavity 1, and an injection hole for injecting insulating medium can also be provided on the top cover 10 of the columnar cavity 1. Of course, in this embodiment, the top cover 10 of the columnar cavity 1 and the side wall of the columnar cavity 1 can also be detachably connected. Thus, both the injection and discharge of insulating medium can be carried out by removing the columnar top cover 10, so as to speed up the injection and discharge of insulating medium.

[0038] In this embodiment, the top cover 10 of the cylindrical cavity 1 has a mounting through hole, through which the conductive component 2 is connected to the top cover 10 of the cylindrical cavity 1. The conductive component 2 may include a high-voltage sleeve 21 and an equalizing ring 22; wherein, the high-voltage sleeve 21 passes through the mounting through hole on the top cover 10 of the cylindrical cavity 1, so that its bottom end extends into the interior of the cylindrical cavity 1; while the equalizing ring 22 is suspended and surrounds the upper half of the high-voltage sleeve 21 by a bracket. In addition, the top end of the high-voltage sleeve 21 is connected to the impulse voltage generator, and the bottom end is connected to the discharge electrode 3, thereby the high-voltage impulse voltage generated by the impulse voltage generator can be conducted to the discharge electrode 3 through the high-voltage sleeve 21. The target voltage generator can output a voltage of up to 800 kV and a maximum charging current of 6 A. It can stably generate a standard lightning impulse waveform of 1.2 (±30%) / 50µs (±20%) and a standard operating impulse waveform of 250 (±20%) / 2500µs (±60%).

[0039] Furthermore, the high-voltage bushing 21 is generally a structural component with a rod-shaped conductive element 210 at its center and an insulating sleeve fitted on the rod-shaped conductive element 210; the high-voltage bushing 21 and the top cover 10 of the cylindrical cavity 1 should be detachably connected, and the discharge electrode 3 and the bottom end of the high-voltage bushing 21 should also be detachably connected. Thus, in practical applications, the bottom end of the high-voltage bushing 21 can be connected to the discharge electrode 3 first, and then the discharge electrode 3 and the bottom end of the high-voltage bushing 21 can be sequentially passed through the mounting through hole on the top cover 10 of the cylindrical cavity 1, so that the lower half of the discharge electrode 3 and the high-voltage bushing 21 are located inside the cylindrical cavity 1, and then the high-voltage bushing 21 and the top cover 10 of the cylindrical cavity 1 can be sealed together.

[0040] Alternatively, in order to fully observe the morphology of the discharge current beam formed between the discharge electrode 3 and the grounding electrode under different spacing conditions during actual observation, a telescopic connector can be further provided between the bottom end of the high-voltage bushing 21 and the discharge electrode 3. By adjusting the length of the telescopic connector in the vertical direction, the height position of the discharge electrode 3 in the cylindrical cavity can be changed, thereby realizing the acquisition and observation of the discharge current beam morphology corresponding to different height spacing d between the discharge electrode 3 and the grounding plate 4.

[0041] In addition, such as Figures 3 to 5 As shown, Figure 3 A schematic diagram showing the relative positions of the needle tip electrode and the ground electrode provided in an embodiment of this application; Figure 4 A schematic diagram showing the relative positions of the spherical electrode and the grounding electrode provided in an embodiment of this application; Figure 5 This is a schematic diagram showing the relative positions of the flat plate electrode and the ground electrode provided in an embodiment of this application.

[0042] The discharge electrode 3 in this embodiment can further include various electrode structures with different structural forms. For example, the discharge electrode 3 can include at least one of the following electrodes: a needle tip electrode, a spherical electrode, and a flat plate electrode; wherein, the needle tip electrode has a tip curvature radius of 50μm-100μm to ensure the stability of the needle tip structure after multiple impact discharge tests; the spherical electrode has a diameter of 15mm-50mm; the flat plate electrode has a side length of 15mm-50mm; correspondingly, the grounding plate 4 is a circular plate with a diameter of 18cm-22cm.

[0043] The discharge electrode 3 in this embodiment includes a variety of replaceable electrode structures. Thus, in practical applications, the bottom end of the high-voltage bushing 21 can be replaced with discharge electrodes 3 of different structural types, thereby sequentially realizing the discharge current beams formed between the needle tip electrode, the spherical electrode, and the plate electrode and the grounding electrode, respectively. That is, simulating the insulating dielectric impulse discharge phenomenon under the conditions of non-uniform field under the needle-plate electrode, slightly non-uniform field under the spherical-plate electrode, and uniform field under the plate-plate electrode.

[0044] Furthermore, the discharge electrode 3 in this embodiment can be a tungsten alloy electrode, while the grounding electrode can be a copper disc.

[0045] Based on the above discussion, in this embodiment, the cylindrical cavity 1, the conductive component 2 connected to the cylindrical cavity 1, the discharge electrode 3, and the grounding electrode together constitute a structural component simulating the discharge current beam phenomenon formed by discharge under different high-voltage electric fields. Furthermore, to further collect and record the morphology of the discharge current beam, at least three camera devices 5 are arranged in a ring around the outer periphery of the cylindrical cavity 1, and the optical axes of any two camera devices 5 are not parallel to each other. This avoids two camera devices 5 capturing images of the discharge current beam morphology inside the cylindrical cavity 1 from the same dimension, thus ensuring that each camera device 5 can jointly collect images of the discharge fluid morphology inside the cylindrical cavity 1 from at least three dimensions, guaranteeing the comprehensive and reliable acquisition of the discharge current beam morphology.

[0046] It is understandable that when each camera device 5 acquires the discharge current beam image formed in the cylindrical cavity 1, it should be directly facing the space between the discharge electrode 3 and the ground electrode. Generally, the optical axes of each camera device 5 are located on the same horizontal plane, and the intersection point of the optical axes of each camera device 5 should be located on the central axis of symmetry of the cylindrical cavity 1.

[0047] like Figure 1 As shown, in Figure 1 In the illustrated embodiment, three camera devices 5 are provided, and the cylindrical cavity 1 is a regular hexagonal prism. The three camera devices 5 are respectively arranged facing the mutually spaced sides of the cylindrical cavity 1, that is, the camera devices 5 are evenly arranged around the cylindrical cavity 1 with an optical axis angle of 120°. Of course, it is understood that in practical applications, the camera devices 5 in this application can also be arranged around the cylindrical cavity 1 in the form of four, five or more, and the camera devices 5 are not necessarily evenly distributed.

[0048] In addition, in order to ensure that the camera device 5 can capture images of the morphology of the discharge current inside the cylindrical cavity 1, the cylindrical cavity 1 can be a transparent cavity; of course, a light-transmitting window can also be opened on the side wall of the cylindrical cavity 1, facing the camera of the camera device 5, so that the camera device 5 can capture images through the light-transmitting window.

[0049] Based on the above discussion, in order to further improve the imaging effect of the camera device 5 in acquiring and capturing images of the current injection inside the cylindrical cavity 1, in an optional embodiment of this application, the morphological observation device may further include:

[0050] Auxiliary reflectors 6 are provided for each camera device 5. The auxiliary reflectors 6 and the corresponding camera devices 5 are respectively set on opposite sides of the cylindrical cavity 1, and the optical axis of the camera device 5 is perpendicular to the reflective surface of the auxiliary reflectors 6.

[0051] like Figure 1 As shown, in this embodiment, each camera device 5 is provided with an auxiliary reflector 6, and the camera device 5 and the corresponding auxiliary reflector 6 are respectively set on the two symmetrical sides of the cylindrical cavity 1. The optical axis of the camera device 5 is also perpendicular to the reflective surface of its corresponding auxiliary reflector 6. This allows the auxiliary reflector 6 to reflect the discharge current beam, so that the camera device 5 can capture the shape image of the discharge current beam more clearly.

[0052] Based on this, in order to ensure that the space between the discharge electrode 3 and the ground electrode is located exactly in the center of the field of view of the camera device 5, in an optional embodiment of this embodiment, each camera device 5 and the auxiliary reflector 6 are mounted on the lifting support frame 72, and / or the columnar cavity 1 is mounted on the lifting platform 71.

[0053] In this embodiment, each camera device 5 and auxiliary reflector 6 can be mounted on a synchronously lifting support frame 72, thereby ensuring that the center of the reflective surface of the auxiliary reflector 6 is always located on the optical axis of the corresponding camera device 5. The relative height between the camera device 5 and the cylindrical cavity 1 is adjustable, ensuring that the space between the discharge electrode 3 and the grounding electrode within the cylindrical cavity 1 is precisely located in the center of the field of view of the camera device 5. In practical applications, the height of the cylindrical cavity 1 can be fixed, with only the heights of the camera device 5 and auxiliary reflector 6 being adjusted synchronously; or the heights of the camera device 5 and auxiliary reflector 6 can be fixed, with only the height of the cylindrical cavity 1 being adjusted; or the heights of the camera device 5, auxiliary reflector 6, and cylindrical cavity 1 can all be adjusted. In short, the relative height between the cylindrical cavity 1, camera device 5, and auxiliary reflector 6 should be reasonable.

[0054] Based on the above discussion, in order to ensure that the camera device 5 can capture clearer images of the cylindrical cavity 1, in an optional embodiment of this application, the morphological observation device may further include:

[0055] The side wall of the cylindrical cavity 1 is provided with a first light-transmitting window 11 corresponding to each camera device 5, and a second light-transmitting window 12 corresponding to each auxiliary reflector 6;

[0056] Each camera device 5 has its camera attached to the corresponding first light-transmitting window 11; the auxiliary reflector 6 is attached to the corresponding second light-transmitting window 12.

[0057] like Figure 1 As shown, in Figure 1In the illustrated embodiment, each camera device 5 and auxiliary reflector 6 has a certain distance between itself and the outer wall of the cylindrical cavity 1. This inevitably results in the space between the discharge electrode 3 and the grounding plate 4 within the cylindrical cavity occupying only a portion of the field of view of the camera device 5. Based on this, as... Figure 1 As shown, in this embodiment, a first light-transmitting window 11 and a second light-transmitting window 12 are provided on the side wall of the cylindrical cavity 1. It can be understood that each first light-transmitting window 11 and a second light-transmitting window 12 should be symmetrically arranged on opposite sides of the cylindrical cavity 1. That is, the corresponding camera device 5 and auxiliary reflector 6 are symmetrically arranged on the side walls of both sides of the cylindrical cavity 1 between the first light-transmitting window 11 and the second light-transmitting window 12 respectively.

[0058] In this embodiment, the camera of the camera device 5 can be directly attached to the side wall of the cylindrical cavity 1. Thus, when the camera device 5 captures images of the cylindrical cavity 1 through the first light-transmitting window 11, the proportion of the discharge space between the discharge electrode 3 and the grounding plate 4 to the field of view of the camera device 5 is maximized, thereby ensuring that each camera device 5 can capture the discharge current injection in the cylindrical cavity 1 more clearly and completely.

[0059] Because the camera device 5 is directly attached to the first light-transmitting window 11, given the typical field of view of the camera device 5, even if the camera of the camera device 5 is deviated from the center of the first light-transmitting window 11 by a certain distance, it can basically ensure that the discharge electrode 3 and the grounding plate 4 fall into the field of view of the camera device 5 at the same time. This makes the vertical height requirement of the camera device 5 relative to the cylindrical cavity 1 lower.

[0060] In addition, in this embodiment, the auxiliary reflector 6 is also attached to the second light-transmitting window 12. This can avoid the need for height adjustment between the auxiliary reflector 6 and the columnar cavity 1, and also prevent ambient light from being reflected on the reflective surface of the auxiliary reflector 6 and incident on the camera of the camera device 5, thereby interfering with the image acquisition of the camera device 5.

[0061] Based on the above embodiments, such as Figure 6 As shown, Figure 6 This is a schematic diagram of a columnar cavity provided in an embodiment of this application. To simplify the installation of the camera device 5 and the auxiliary reflector 6 into the first light-transmitting window 11 and the second light-transmitting window 12, respectively, in an optional embodiment of this application, the columnar cavity 1 may further include a U-shaped limiting groove 111 on the outer wall corresponding to each of the first light-transmitting windows 11 for supporting the camera device 5; the U-shaped limiting groove 111 extends sequentially along one side of the first light-transmitting window 11 to the bottom edge and the other side.

[0062] The auxiliary reflector 6 is a reflective lens; a limiting plate 121 is provided on the columnar cavity 1 corresponding to each second light-transmitting window 12 and with a gap between the second light-transmitting window 12, for fixing the reflective lens between the second light-transmitting window 12 and the limiting plate 121.

[0063] like Figure 2 As shown, in this embodiment, a U-shaped limiting slot 111 for supporting the camera device 5 is provided at the edge of the first light-transmitting window 11. Therefore, in practical applications, it is only necessary to lock the camera device 5 in the U-shaped limiting slot 111 to restrict the camera of the camera device 5 from being attached to the outer surface of the first light-transmitting window 11.

[0064] A limiting plate 121 is provided at the position of the second light-transmitting window 12, allowing the reflective lens 6, which serves as an auxiliary reflector, to be inserted into the gap between the second light-transmitting window 12 and the limiting plate 121. Clearly, the U-shaped limiting slot 111 and the limiting plate 121 in this application enable simple and convenient installation of the camera device 5 without requiring adjustment of the position or height of the camera device 5 and the auxiliary reflector 6.

[0065] Based on any of the above embodiments, since the auxiliary reflector 6 mainly forms a reflective surface on the side of the cylindrical cavity 1 opposite to the camera device 5, in an optional embodiment of this embodiment, the auxiliary reflector 6 can also be a reflective film layer directly attached to the outer surface of the second light-transmitting window 12. The reflective film layer can be plated on the second light-transmitting window 12, or it can be glued to the second light-transmitting window 12 by adhesive bonding, thereby further eliminating the need for an installation structure for the auxiliary reflector 6.

[0066] In summary, this application uses a cylindrical cavity as a container to hold the insulating medium, providing an isolated space that isolates the insulating medium from the external environment, allowing for the formation of a discharge current beam. A discharge electrode and a grounding electrode are respectively installed at the top and bottom of the cylindrical cavity, and the discharge electrode is connected to an external impulse voltage generator via a conductive component. Therefore, when the insulating medium is injected into the cylindrical cavity, but does not cover the space between the discharge electrode and the grounding plate, the discharge electrode is connected to a high voltage via the conductive component and the impulse voltage generator, thus forming a discharge current beam between the discharge electrode and the grounding plate. Furthermore, this application further includes at least three imaging devices surrounding the cylindrical cavity, with the optical axes of any two cameras being non-parallel. This allows for the acquisition of images of the discharge current beam from at least three different angles, providing more comprehensive and reliable data for further analysis of the beam's morphology and path.

[0067] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that the elements inherent in a process, method, article, or apparatus that includes a list of elements are included. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Additionally, portions of the technical solutions provided in the embodiments of this application that are consistent with the implementation principles of corresponding technical solutions in the prior art have not been described in detail to avoid excessive elaboration.

[0068] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A device for observing the morphology of a discharge current beam in an insulating medium, characterized in that, include: Columnar cavity; A conductive component disposed at the top of the columnar cavity and penetrating the top cover of the columnar cavity; The conductive component is connected to an impulse voltage generator at its top end; a discharge electrode is connected to the bottom end of the conductive component; a grounding plate is disposed at the bottom of the inner side of the cylindrical cavity; at least three camera devices are arranged around the outer periphery of the cylindrical cavity for image acquisition of the interior of the cylindrical cavity; wherein the optical axes of any two camera devices are not parallel to each other.

2. The morphological observation device for the discharge current beam of an insulating medium as described in claim 1, characterized in that, It also includes auxiliary reflectors that correspond one-to-one with each of the camera devices; the auxiliary reflectors and the corresponding camera devices are respectively disposed on opposite sides of the cylindrical cavity, and the optical axis of the camera device is perpendicular to the reflective surface of the auxiliary reflector.

3. The morphological observation device for the discharge current beam of an insulating medium as described in claim 2, characterized in that, Each of the aforementioned camera devices and the aforementioned auxiliary reflectors are mounted on a lifting support frame, and / or the aforementioned columnar cavity is mounted on a lifting platform.

4. The device for observing the morphology of discharge current beams in insulating dielectrics as described in claim 2, characterized in that, The cylindrical cavity has a first light-transmitting window on its side wall corresponding to each of the camera devices, and a second light-transmitting window corresponding to each of the auxiliary reflectors. Each of the aforementioned camera devices has its camera lens attached to the corresponding first light-transmitting window; the auxiliary reflector is attached to the corresponding second light-transmitting window.

5. The morphological observation device for the discharge current beam of an insulating medium as described in claim 4, characterized in that, The outer wall of the columnar cavity is provided with a U-shaped limiting groove for supporting the camera device, corresponding to each of the first light-transmitting windows; the U-shaped limiting groove extends sequentially from one side of the first light-transmitting window to the bottom and the other side. The auxiliary reflector is a reflective lens; A limiting plate is provided on the columnar cavity corresponding to each of the second light-transmitting windows and with a gap between them, for securing the reflective lens between the second light-transmitting window and the limiting plate.

6. The device for observing the morphology of discharge current beams in insulating dielectrics as described in claim 4, characterized in that, The auxiliary reflective element is a reflective film layer attached to the outer surface of the second light-transmitting window.

7. The device for observing the morphology of discharge current beams in insulating dielectrics as described in claim 1, characterized in that, The camera device is provided in three parts; the cylindrical cavity is a regular hexagonal prism, and the three camera devices are respectively positioned facing three spaced-apart sides of the cylindrical cavity.

8. The device for observing the morphology of discharge current beams in insulating dielectrics as described in claim 1, characterized in that, The cylindrical cavity is a glass fiber insulating tube; The volume of the cylindrical cavity is 100L~110L; the inner height of the cylindrical cavity is 300mm~320mm.

9. The device for observing the morphology of discharge current beams in insulating dielectrics as described in claim 1, characterized in that, The discharge electrode is connected to the conductive component via a telescopic connector.

10. The morphological observation device for the discharge current beam of an insulating medium as described in claim 1, characterized in that, The discharge electrode is a tungsten alloy electrode; The discharge electrode includes at least one of the following: a needle tip electrode, a spherical electrode, and a flat plate electrode; wherein the needle tip electrode has a tip curvature radius of 50μm-100μm; the spherical electrode has a diameter of 15mm-50mm; and the flat plate electrode has a side length of 15mm-50mm. The grounding electrode is a round copper plate with a diameter of 18cm to 22cm.

Images