High-voltage cable grounding arc test device based on reclosing

Abstract

According to the reclosing-based high-voltage cable grounding arc test device, an insulating layer wraps the outer surface of a wire core conductor, the insulating layer is provided with a connecting hole abutting against the wire core conductor, a metal sheath wraps the outer surface of the insulating layer, one end of an arc striking copper wire is electrically connected with the wire core conductor through the connecting hole, and the other end of the arc striking copper wire is electrically connected with the metal sheath. The first copper bar is arranged on a metal sheath at one end of the cable sample, and the second copper bar is arranged on a wire core conductor at the other end of the cable sample; the fixing rope belt binds the cable sample, and two ends of the fixing rope belt are fixed in the pair of grooves; the circuit breaker is connected with the second copper bar through a connecting cable; one end of the test power supply is connected to the circuit breaker through the current measuring equipment, the other end is connected with the first copper bar, the test power supply comprises an impact generator, an impedance regulator and a transformer, and the voltage measuring equipment is connected in parallel with the test power supply and measures voltage data.

Description

Technical Field

[0001] The invention belongs to the technical field of high-voltage cable grounding arc testing, in particular to a high-voltage cable grounding arc testing device based on a reclosing switch. Background Art

[0002] Due to unexpected factors in the production, transportation, and laying of cables, or the influence of the environment, cables may have local defects and further deteriorate during operation, leading to insulation breakdown and arc faults. Arc faults account for a large part of power equipment failures. The grounding arc current of high-voltage cables is high and the energy release is violent, which can easily cause fire accidents. Therefore, studying cable grounding arcs is of great significance to the safe and stable operation of power systems.

[0003] In the prior art, the cable grounding arc test is mainly aimed at distribution cables of lower voltage levels. Due to the setting rules of the distribution line relay protection, when a grounding arc fault occurs, the circuit breaker is usually not reclosed after tripping. However, in high-voltage cable lines, reclosing will be performed after the circuit breaker trips, thereby triggering arcing again. Therefore, the previous test device lacks the line reclosing process and cannot test the reclosing arc, so the test cannot be carried out completely. In addition, if the test is carried out according to the actual operating conditions of the high-voltage cable, a very high power supply voltage and current are required, which puts high demands on the performance of the test power supply, and even makes it impossible to carry out the test, which makes the high-voltage cable grounding arc test more difficult to carry out. Therefore, a high-voltage cable grounding arc test device that takes reclosing into account is needed. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a high-voltage cable grounding arc test device based on reclosing, which can realize the cable reclosing process through the circuit breaker, so that the test can be carried out completely and the electrical characteristics and morphological characteristic images of the high-voltage cable grounding arc can be obtained. The present invention can reduce the requirements for the test power supply.

[0005] The high voltage cable grounding arc test device based on reclosing includes:

[0006] a pair of rails arranged at intervals and extending in a first direction;

[0007] A movable protective cover, which can be movably connected to a pair of rails to cover the cable sample;

[0008] a pair of grooves arranged at intervals and located between the pair of rails, the grooves extending along a first direction;

[0009] a cable bracket fixed between the pair of grooves;

[0010] Cable specimen, which includes,

[0011] Core conductor;

[0012] An insulating layer wrapped around the outer surface of the wire core conductor, the insulating layer being provided with a connection hole abutting against the wire core conductor;

[0013] A metal sheath wrapped around the outer surface of the insulation layer;

[0014] An arc-starting copper wire, one end of which is electrically connected to the core conductor via a connecting hole, and the other end of which is electrically connected to the metal sheath;

[0015] A first copper bar, which is arranged on the metal sheath at one end of the cable sample;

[0016] A second copper bar, which is arranged on the core conductor at the other end of the cable sample;

[0017] A fixing rope, which is used to bind the cable sample and has two ends fixed in a pair of grooves;

[0018] a circuit breaker connected to the second copper busbar via a connecting cable;

[0019] A test power supply, one end of which is connected to the circuit breaker via a current measuring device, and the other end is connected to the first copper busbar, the test power supply comprising an impulse generator, an impedance regulator and a transformer;

[0020] A voltage measuring device is connected in parallel with the test power supply and measures voltage data.

[0021] In the high-voltage cable grounding arc test device based on reclosing, the circuit breaker is closed, an arc is generated under the arc-starting copper wire of the cable sample, and then the circuit breaker is disconnected, and the arc is extinguished. At this time, the reclosing time begins, and the voltage measuring device and the current measuring device synchronously measure the output voltage and current of the test power supply. The output voltage of the power supply is the voltage at both ends of the cable sample, and the output current of the power supply is the current flowing through the cable sample.

[0022] In the high-voltage cable grounding arc test device based on reclosing, there are two arcing times and one reclosing time. The circuit breaker is closed, and the cable sample generates an arc under the arc-starting copper wire. The initial arcing starts at 0.05s and lasts to about 0.55s. The arc current passes through a transient component with an effective value of 2.5 times at the moment of closing, and gradually stabilizes to a 20kA power frequency periodic waveform. During the reclosing time, the current is 0, and the voltage at both ends of the cable sample is the power bus voltage. After reclosing, the cable sample will break down again and initiate arcing. The arcing time is from 2.09s to 2.19s.

[0023] In the reclosing-based high-voltage cable grounding arc test device, a test power supply, a current measuring device, a circuit breaker and a cable sample form a loop.

[0024] In the high-voltage cable grounding arc test device based on reclosing, the impedance regulator adjusts the current level of the loop.

[0025] In the high-voltage cable grounding arc test device based on reclosing, the test power supply adjusts the current and power supply and executes the test action via the controller.

[0026] In the high-voltage cable grounding arc test device based on reclosing, a semi-conductive tape wrapping the outer surface of the core conductor and a conductor shielding layer wrapping the outer surface of the semi-conductive tape are provided between the core conductor and the insulating layer, and the outer surface of the conductor shielding layer is wrapped by the insulating layer.

[0027] In the reclosing-based high-voltage cable grounding arc test device, an insulating shielding layer wrapping the outer surface of the insulating layer and a water-blocking tape wrapping the insulating shielding layer are provided between the insulating layer and the metal sheath, and the outer surface of the water-blocking tape is wrapped by the metal sheath.

[0028] In the reclosing-based high-voltage cable grounding arc test device, the outer surface of the metal jacket is wrapped with an outer sheath.

[0029] In the reclosing-based high-voltage cable grounding arc test device, the insulating layer includes cross-linked polyethylene.

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

[0031] The high-voltage cable grounding arc test device based on reclosing restores the high-voltage cable grounding arc to the greatest extent, reduces the performance requirements of the test power supply, and takes into account the reclosing process of the high-voltage cable relay protection, which provides conditions for the test of grounding arc faults caused by the degradation and breakdown of the high-voltage cable insulation, is conducive to the study of the transient process of the power system, and has played a promoting role in the research of power safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings illustrate exemplary embodiments of the present invention and together with the description serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0033] Figure 1 is a schematic cross-sectional view of a high-voltage cable of a high-voltage cable grounding arc test device based on a reclosing switch in one embodiment of the present invention;

[0034] Figure 2 It is a schematic structural diagram of a cable sample of a high-voltage cable grounding arc test device based on a reclosing switch in one embodiment of the present invention;

[0035] Figure 3It is a structural schematic diagram of a high-voltage cable grounding arc test device based on reclosing in one embodiment of the present invention;

[0036] Figure 4 It is a schematic diagram of the structure of a cable sample covered by a movable protective cover of a high-voltage cable grounding arc test device based on a reclosing switch in one embodiment of the present invention;

[0037] Figure 5 1 is a schematic diagram of the circuit structure of a high-voltage cable grounding arc test device based on a reclosing switch in one embodiment of the present invention;

[0038] Figure 6 It is a schematic diagram of the structure of a test power supply of a high-voltage cable grounding arc test device based on a reclosing switch in one embodiment of the present invention;

[0039] Figure 7(a) to Figure 7(c) 7 is a schematic diagram of test voltage of a high-voltage cable grounding arc test device based on a reclosing switch in one embodiment of the present invention, wherein FIG7(a) is a voltage curve diagram at both ends of a cable sample, FIG7(b) is a curve diagram of the initial arc voltage, and FIG7(c) is a curve diagram of the reclosing switch arc voltage;

[0040] Figure 8 It is a test current schematic diagram of a high-voltage cable grounding arc test device based on reclosing in one embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and implementations. It is to be understood that the specific implementations described herein are only used to explain the relevant content, rather than to limit the present invention. It is also necessary to explain that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings.

[0042] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments can be combined with each other. The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] Unless otherwise specified, the exemplary embodiments / embodiments shown will be understood as exemplary features that provide various details of some ways in which the technical concept of the present invention can be implemented in practice. Therefore, unless otherwise specified, the features of the various embodiments / embodiments can be combined, separated, interchanged and / or rearranged without departing from the technical concept of the present invention.

[0044] Cross-hatching and / or shading may be used in the drawings, typically to make the boundaries between adjacent components clear. As such, unless otherwise specified, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for the specific materials, material properties, dimensions, proportions, commonalities between the components shown, and / or any other characteristics, attributes, properties, etc. of the components. In addition, in the drawings, the sizes and relative sizes of the components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments may be implemented differently, the specific process sequence may be performed in a different order than the described step sequence. For example, two successively described processes may be performed substantially simultaneously or in an order opposite to the described order. In addition, the same figure numbers represent the same components.

[0045] When a component is referred to as being "on" or "over," "connected to," or "coupled to" another component, the component may be directly on, directly connected to, or directly coupled to the other component, or intervening components may be present. However, when a component is referred to as being "directly on," "directly connected to," or "directly coupled to" another component, there are no intervening components. For this purpose, the term "connected" may refer to a physical connection, an electrical connection, etc., with or without intervening components.

[0046] For descriptive purposes, the present invention may use spatially relative terms such as "below", "beneath", "under", "lower", "above", "upper", "above", "higher", and "side (e.g., as in "sidewall")" to describe the relationship of one component to another (other) component as shown in the accompanying drawings. The spatially relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, components described as "below" or "beneath" other components or features would then be positioned "above" the other components or features. Thus, the exemplary term "below" can encompass both the "above" and "below" orientations. Furthermore, the device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0047] The terms used here are for the purpose of describing specific embodiments, and are not intended to be restrictive. As used here, unless the context clearly indicates otherwise, the singular forms "one (kind, person)" and "said (the)" are also intended to include plural forms. In addition, when the terms "comprise" and / or "include" and their variations are used in this specification, it is explained that there are stated features, integral bodies, steps, operations, parts, assemblies and / or their groups, but it is not excluded that there are or add one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups. It should also be noted that, as used here, the terms "substantially", "approximately" and other similar terms are used as approximate terms and not as degree terms, so that they are used to explain the inherent deviations of the measured values, calculated values ​​and / or the values ​​provided that will be recognized by those of ordinary skill in the art.

[0048] See also Figures 1 to 8 In one embodiment, the high-voltage cable grounding arc test device based on reclosing of the present invention comprises:

[0049] A pair of rails 1, which are arranged at intervals and extend along a first direction;

[0050] A movable protective cover 2, which is movably connected to a pair of rails 1 to cover a cable sample 5;

[0051] a pair of grooves 3, which are arranged at intervals and located between the pair of rails 1, and the grooves 3 extend along a first direction;

[0052] a cable support 4, which is fixed between the pair of grooves 3;

[0053] Cable sample 5, comprising,

[0054] Core conductor 6;

[0055] an insulating layer 7, which is wrapped around the outer surface of the core conductor 6, and the insulating layer 7 is provided with a connecting hole 8 abutting against the core conductor 6;

[0056] A metal sheath 9 wrapped around the outer surface of the insulating layer 7;

[0057] An arc-starting copper wire 10, one end of which is electrically connected to the core conductor 6 via the connecting hole 8, and the other end of which is electrically connected to the metal sheath 9;

[0058] A first copper bar 11, which is provided on the metal sheath 9 at one end of the cable sample 5;

[0059] A second copper busbar 12, which is provided on the core conductor 6 at the other end of the cable sample 5;

[0060] A fixing rope 13, which is used to bind the cable sample 5 and has two ends fixed in a pair of grooves 3;

[0061] A circuit breaker 14 connected to the second copper bus 12 via a connecting cable 21;

[0062] A test power source 15, one end of which is connected to the circuit breaker 14 via a current measuring device, and the other end of which is connected to the first copper bus 11. The test power source 15 includes an impulse generator, an impedance regulator and a transformer.

[0063] A voltage measuring device is connected in parallel to the test power supply 15 and measures voltage data.

[0064] In a preferred embodiment of the high-voltage cable grounding arc test device based on reclosing, the circuit breaker 14 is closed, the cable sample 5 generates an arc under the arc-starting copper wire 10, and then the circuit breaker 14 is disconnected, and the arc is extinguished. At this time, the reclosing time is entered, and the voltage measuring device and the current measuring device synchronously measure the output voltage and current of the test power supply 15. The output voltage of the power supply is the voltage at both ends of the cable sample 5, and the output current of the power supply is the current flowing through the cable sample 5.

[0065] In the preferred embodiment of the high-voltage cable grounding arc test device based on reclosing, there are two arcing times and one reclosing time. The circuit breaker 14 is closed, and the cable sample 5 generates an arc under the arc-starting copper wire 10. The initial arcing starts at 0.05s and lasts to about 0.55s. The arc current passes through a transient component with an effective value of 2.5 times at the moment of closing, and gradually stabilizes to a 20kA power frequency periodic waveform. During the reclosing time, the current is 0, and the voltage at both ends of the cable sample 5 is the power bus voltage. After reclosing, the cable sample 5 will break down again and initiate arcing. The arcing time is from 2.09s to 2.19s.

[0066] In the preferred embodiment of the high-voltage cable grounding arc test device based on reclosing, the test power supply 15, the current measuring device, the circuit breaker 14 and the cable sample 5 form a loop.

[0067] In a preferred embodiment of the high-voltage cable grounding arc test device based on reclosing, the impedance regulator adjusts the current level of the loop.

[0068] In the preferred embodiment of the high-voltage cable grounding arc test device based on reclosing, the test power supply 15 adjusts the current and power supply and performs the test action via a controller.

[0069] In a preferred embodiment of the high-voltage cable grounding arc test device based on reclosing, a semi-conductive tape 16 wrapping the outer surface of the core conductor 6 and a conductor shielding layer 17 wrapping the outer surface of the semi-conductive tape 16 are provided between the core conductor 6 and the insulating layer 7, and the outer surface of the conductor shielding layer 17 is wrapped by the insulating layer 7.

[0070] In a preferred embodiment of the high-voltage cable grounding arc test device based on reclosing, an insulating shielding layer 18 wrapping the outer surface of the insulating layer 7 and a water-blocking tape 19 wrapping the insulating shielding layer 18 are provided between the insulating layer 7 and the metal sheath 9, and the outer surface of the water-blocking tape 19 is wrapped by the metal sheath 9.

[0071] In a preferred embodiment of the high-voltage cable grounding arc test device based on reclosing, the outer surface of the metal jacket is wrapped with an outer sheath 20.

[0072] In a preferred embodiment of the high-voltage cable grounding arc test device based on reclosing, the insulating layer 7 includes cross-linked polyethylene.

[0073] In one embodiment, a high-speed camera is further included, which is directed toward the arc-starting copper wire 10 to photograph the arc.

[0074] In one embodiment, the length of the cable sample 5 to be tested is 2 meters. Since the cable grounding arc occurs in the air gap of the cable insulation layer 7, Figure 2 As shown, the cable sample 5 is stripped to the cross-linked polyethylene insulation layer 7 in the center, and a connection hole 8 is drilled thereon to a depth reaching the core conductor 6. A 0.5 mm arc-starting copper wire 10 is used to connect the core conductor 6 and the metal sheath 9, and this point is used as the arc-starting point. Since the cable sample 5 is to be connected to the circuit, its electrical contact point needs to withstand a high short-circuit current, so a cable joint needs to be made. One end of the cable is stripped to the metal sheath 9, and a first copper busbar 11 is installed on the metal sheath 9 as a cable joint; the other end is stripped layer by layer to the cross-linked polyethylene insulation layer 7 and the core conductor 6, and a second copper busbar 12 is installed on the core conductor 6 as a cable joint.

[0075] In one embodiment, the processed cable sample 5 is placed on the cable support 4 and tied with a fixing rope 13, and the two ends of the rope 13 are fixed in the groove 3 on the ground to ensure that the cable sample 5 will not fall due to the electric force during the test. One end of the core conductor 6 of the cable sample 5 is connected to the circuit breaker 14 through a connecting cable. The movable protective cover 2 can move along the groove 3 on the ground, and the movable protective cover 2 is pushed to cover the cable sample 5 to ensure the safety of the test.

[0076] In one embodiment, one end of the test power supply 15 is connected to the circuit breaker 14 after passing through the current measuring device, and then connected to the core conductor 6 of the cable sample 5 through the circuit breaker 14 with a connecting cable, and the metal sheath 9 on the other side of the cable is connected back to the other side of the test power supply 15 and grounded on that side. Both ends of the test power supply 15 are connected in parallel with the voltage measuring device.

[0077] In one embodiment, the test power supply 15 of the present invention is composed of a large-capacity impulse generator, an impedance regulator and a transformer, wherein the large-capacity impulse generator can provide the short-circuit power requirement in a short period of time, the impedance regulator can adjust the current level of the loop by setting, and the transformer is used to adjust the output voltage of the test power supply 15. The above three devices can complete the setting and corresponding actions under the control of computer software. The test power supply 15 is usually set according to the actual operating conditions of the cable, but in the ground arc test of the high-voltage cable, most power supplies cannot reach the actual short-circuit capacity. Considering that the thermal effect of the arc mainly comes from the short-circuit current, it can be considered to reduce the power supply voltage to a level sufficient to maintain the arc, while the current is the same as the actual short-circuit current, that is, the power supply capacity required for the test is reduced. In addition, considering the transient process during the short circuit, referring to the relevant standards, the short-circuit current peak value at the moment of the test closing can be set to 2.5 times the effective value, and the high-voltage DC cable is set to 1.7 times the short-circuit current level. After determining the short-circuit current level, the test power supply 15 can output the current according to the required requirements by controlling the current.

[0078] At the beginning of the test, the circuit breaker 14 is closed, and the cable sample 5 generates an arc at the arc-starting point. The initial arcing time can be selected from 0.1s, 0.3s or 0.5s, and then the circuit breaker 14 is disconnected, the arc is extinguished, and the reclosing time is entered at this time. The duration can be set according to the specific line conditions. After the reclosing time, the circuit breaker 14 recloses. At this time, the cable sample 5 arcs again. The reclosing arcing time is generally short, so it can be set to 0.1s. Thereafter, the circuit breaker 14 is disconnected and the test ends. While the test is in progress, the voltage measuring device and the current measuring device synchronously measure the output voltage and current of the power supply. The output voltage of the power supply is the voltage at both ends of the cable sample 5, and the output current of the power supply is the current flowing through the cable sample 5.

[0079] Example 1

[0080] The voltage and current curves of the 110kV high voltage AC cable sample 5 obtained by using the test device are as follows: Figure 7(a) to Figure 8As shown. The test process is divided into two arcing times and one reclosing time. The initial arcing starts at about 0.05s and lasts for about 0.55s. The arc current passes through a transient component of about 2.5 times the effective value at the moment of closing, and gradually stabilizes to a 20kA power frequency cycle waveform, which meets the requirements of the arc test. The voltage distortion is large, and the peak value of the voltage is no longer a platform, but slightly bulges upward. This is due to the strong thermal effect of the large current arc, which makes the resistance drop rapidly to a very small resistance value after the current passes through zero point. Therefore, the voltage has a bulging corner at the top after the sudden increase. During the reclosing time, since the circuit is disconnected, the current is 0, and the voltage at both ends of the sample is the power bus voltage. After reclosing, cable sample 5 will break down again and cause arcing, and the arcing time is about 2.09s to 2.19s.

[0081] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments / methods or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments / methods or examples described in this specification and the features of the different embodiments / methods or examples, unless they are contradictory.

[0082] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0083] It should be understood by those skilled in the art that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present invention.

Claims

1. A high voltage cable grounding arc test device based on reclosing, characterized in that: It includes: a pair of rails arranged at intervals and extending in a first direction; A movable protective cover, which can be movably connected to a pair of rails to cover the cable sample; a pair of grooves arranged at intervals and located between the pair of rails, the grooves extending along a first direction; a cable bracket fixed between the pair of grooves; Cable specimen, which includes, Core conductor; An insulating layer wrapped around the outer surface of the wire core conductor, the insulating layer being provided with a connection hole abutting against the wire core conductor; A metal sheath wrapped around the outer surface of the insulation layer; An arc-starting copper wire, one end of which is electrically connected to the core conductor via a connecting hole, and the other end of which is electrically connected to the metal sheath; A first copper bar, which is arranged on the metal sheath at one end of the cable sample; A second copper bar, which is arranged on the core conductor at the other end of the cable sample; A fixing rope, which is used to bind the cable sample and has two ends fixed in a pair of grooves; a circuit breaker connected to the second copper busbar via a connecting cable; A test power supply, one end of which is connected to the circuit breaker via a current measuring device, and the other end is connected to the first copper busbar, the test power supply comprising an impulse generator, an impedance regulator and a transformer; A voltage measuring device is connected in parallel with the test power supply and measures voltage data.

2. The high-voltage cable grounding arc test device based on reclosing according to claim 1 is characterized in that: Preferably, the circuit breaker is closed, an arc is generated under the arc-starting copper wire in the cable sample, and then the circuit breaker is disconnected, and the arc is extinguished. At this time, the reclosing time begins, and the voltage measuring device and the current measuring device synchronously measure the output voltage and current of the test power supply. The output voltage of the power supply is the voltage at both ends of the cable sample, and the output current of the power supply is the current flowing through the cable sample.

3. The high-voltage cable grounding arc test device based on reclosing according to claim 2 is characterized in that: There are two arcing times and one reclosing time. The circuit breaker is closed and an arc is generated under the arc-starting copper wire in the cable sample. The initial arcing starts at 0.05s and lasts to about 0.55s. The arc current passes through a transient component with an effective value of 2.5 times at the moment of closing and gradually stabilizes to a 20kA power frequency cycle waveform. During the reclosing time, the current is 0 and the voltage at both ends of the cable sample is the power bus voltage. After reclosing, the cable sample will break down again and initiate arcing. The arcing time is from 2.09s to 2.19s.

4. The high-voltage cable grounding arc test device based on reclosing according to claim 1 is characterized in that: The test power supply, current measuring equipment, circuit breaker and cable sample form a circuit.

5. The high-voltage cable grounding arc test device based on reclosing according to claim 4 is characterized in that: The impedance regulator adjusts the current level of the loop.

6. The high-voltage cable grounding arc test device based on reclosing according to claim 1 is characterized in that: The test power supply regulates the current and power and performs the test actions via the controller.

7. The high-voltage cable grounding arc test device based on reclosing according to claim 1 is characterized in that: A semi-conductive tape wrapping the outer surface of the core conductor and a conductor shielding layer wrapping the outer surface of the semi-conductive tape are arranged between the core conductor and the insulating layer, and the outer surface of the conductor shielding layer is wrapped by the insulating layer.

8. The high-voltage cable grounding arc test device based on reclosing according to claim 1, characterized in that: An insulating shielding layer wrapping the outer surface of the insulating layer and a water blocking tape wrapping the insulating shielding layer are provided between the insulating layer and the metal sheath, and the outer surface of the water blocking tape is wrapped by the metal sheath.

9. The high-voltage cable grounding arc test device based on reclosing according to claim 1, characterized in that: The outer surface of the metal jacket is wrapped with an outer sheath.

10. The high-voltage cable grounding arc test device based on reclosing according to claim 1, characterized in that: The insulating layer includes cross-linked polyethylene.

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