Compact low-inductance impulse voltage generator device

Abstract

The invention relates to the technical field of impulse voltage generating devices, in particular to a compact low-inductance impulse voltage generator device which comprises a butt-joint inflatable insulating shell and a movable crawler which are connected through a butt-joint flange, and an insulating supporting piece comprises a vertical supporting rod and a high-density PP insulating isolation plate. An annular shielding electrode is arranged on the outer side surface of each high-density PP insulating isolation plate; a low-inductance impulse voltage generator is arranged on each layer of high-density PP insulating isolation plate; single bilateral charging impulse voltage generator loops are isolated and insulated through high-density PP insulation isolation plates. Therefore, the device can be directly butted with a test object, a sleeve is not needed, a butting building block totally-enclosed insulation barrel type structure is adopted, the height of the device is effectively controlled, transportation and installation are facilitated, the number of building block sections can be selected according to field test requirements, the voltage grade can be changed, the inherent inductance of a loop can be effectively reduced, and steep waveforms can be output.

Description

Technical Field

[0001] This invention relates to a generator device, and more particularly to a compact low-inductance impulse voltage generator device, belonging to the technical field of impulse voltage generator devices. Background Technology

[0002] Both factory tests and field tests of power equipment require lightning impulse withstand voltage tests, and impulse voltage is usually generated by an impulse voltage generator.

[0003] Currently, the most commonly used impulse voltage generators are open-type impulse voltage generators, which use air as the insulating medium. These open-type impulse generators are limited by the low dielectric strength of air, resulting in a large size. The tower structure also leads to a high height, requiring disassembly and transportation, which is not conducive to on-site testing. The large size of the space also leads to an increase in the inherent inductance of the circuit, which is not conducive to the steepening of the impulse waveform. When conducting large-capacity test samples, it is also difficult to output an impulse voltage waveform with a steep leading edge that meets the requirements.

[0004] Therefore, it is urgent to improve the low-inductance impulse voltage generator device to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a compact low-inductance impulse voltage generator device. Therefore, this device can be directly connected to the test sample without the need for a sleeve. It adopts a fully enclosed insulating barrel structure with interlocking blocks, which effectively controls the height of the device, making it easy to transport and install. The number of blocks can also be selected according to the requirements of the field test to change the voltage level, effectively reducing the inherent inductance of the circuit and outputting a steeper waveform.

[0006] To achieve the above objectives, the main technical solutions adopted by the present invention include: A compact low-inductance impulse voltage generator device includes several dockable inflatable insulating housings connected by docking flanges and a mobile tracked vehicle for moving the dockable inflatable insulating housings. An insulating support is fixedly installed inside the dockable inflatable insulating housing. The insulating support includes several vertically arranged vertical support rods and several horizontally arranged high-density PP insulating isolation plates. Several high-density PP insulating isolation plates are arranged parallel to the vertical support rods. Each high-density PP insulating isolation plate has a ring-shaped shielding electrode on its outer surface. Each layer of the high-density PP insulating isolation plate is equipped with a low-inductance impulse voltage generator. The low-inductance impulse voltage generator inside the dockable inflatable insulating shell of each layer is placed inside the dockable inflatable insulating shell in a gas-insulated form. The low-inductance impulse voltage generator includes two pulse capacitors and a ball gap gas switch. The ball gap gas switch is connected between the two pulse capacitors to form a single double-sided charging impulse voltage generator circuit. The low-inductance impulse voltage generator is electrically connected to a charging device through an isolation resistor. The charging device is located at the bottom of the insulating support. The individual double-sided charging impulse voltage generator circuits are isolated and insulated from each other by the high-density PP insulating isolation plate.

[0007] Preferably, several of the vertical support rods pass through the high-density PP insulating isolation plate and are fixedly connected to the vertical support rods, and the pulse capacitor is fixedly mounted on the vertical support rods.

[0008] Preferably, a busbar port is provided in the middle of the docking flange, and a one-way valve and two symmetrically distributed charging ports are provided around the busbar port. The one-way valve is used to connect the two dockable inflatable insulating shells when the two sections are docked, so that the air pressure inside the two dockable inflatable insulating shells is the same, ensuring that the docking flange does not bear gas pressure. The charging port is used for bilateral charging of the pulse capacitor between the two poles and is led out using a small basin-type insulator or insulating material. The busbar port is used to lead out the busbar, connect to the next section or output directly, and is led out using basin-type insulators or insulating materials.

[0009] Preferably, each of the low-inductance impulse voltage generators is an independent structure, used directly as a generator, or multiple sections are connected together to generate higher voltages.

[0010] Preferably, each layer of the dockable inflatable insulating shell has three docking metal conductors at the top and bottom, namely, an impulse voltage output terminal, a positive and negative charging terminal, and a one-way valve connection terminal; The impulse voltage output terminal is electrically connected to the bus port, the positive and negative charging terminals are electrically connected to the charging port, and the one-way valve connection terminal is electrically connected to the one-way valve. The impulse voltage output terminal is electrically connected to the ring-shaped shielded electrode in the last section; The mating metal conductors are supported by the basin-type insulator or the insulating material on the mating inflatable insulating shell.

[0011] Preferably, the bottom of the insulating support is connected to a support base, the support base is fixedly mounted on the dockable inflatable insulating shell, and the charging device is disposed between the support base and the dockable inflatable insulating shell.

[0012] Preferably, the charging device can charge the pulse capacitor on both the positive and negative sides, using a constant voltage or constant current charging method, and the charging speed can be easily adjusted.

[0013] Preferably, the interior of the dockable inflatable insulating shell uses pure SF6 gas and an SF6 / N2 mixture as the gaseous insulating medium within the dockable inflatable insulating shell. The SF6 content in the SF6 / N2 mixture ranges from 15% to 95%. The internal inflation pressure of the inflatable insulating shell is between 0.15 MPa and 0.2 MPa, and the inflation pressure of the SF6 / N2 mixed gas is higher than that of SF6.

[0014] Preferably, the mobile tracked vehicle is provided with guide wheels and drive wheels, and a track assembly is provided outside the guide wheels. The guide wheels and drive wheels are symmetrically arranged in the mobile tracked vehicle, and a tension wheel is provided between the symmetrical guide wheels and drive wheels.

[0015] Preferably, a travel reducer is sleeved in the middle of the drive wheel, a counterweight chassis is provided between the mobile tracked vehicles, a large power testing device is fixed on the counterweight chassis, and the large power testing device is fixedly connected to the bottommost dockable inflatable insulating shell.

[0016] The present invention has at least the following beneficial effects: 1. Therefore, this device can be directly connected to the test sample without the need for a sleeve. It adopts a fully enclosed insulating barrel structure with interlocking blocks, which effectively controls the height of the device, making it easy to transport and install. The number of blocks can also be selected according to the requirements of the field test to change the voltage level, effectively reducing the inherent inductance of the circuit and outputting a steeper waveform.

[0017] 2. Integrating multiple functional interfaces into a limited space makes the entire device compact, saves space, and facilitates installation and layout within a limited space, improving the space utilization of the equipment. In addition, different functional ports can be designed, manufactured, and tested independently. During assembly, each module only needs to be connected according to requirements, which improves production efficiency and reduces production costs. At the same time, basin-type insulators or insulation materials can be selected and designed according to actual needs to adapt to different working environments and electrical requirements, protecting the mating metal conductors and the stability of the entire device.

[0018] 3. SF6 gas has extremely high insulation strength. Its molecular structure is stable and it is not easily ionized under the action of an electric field. It can effectively prevent current leakage and flashover. When the SF6 content is between 15% and 95%, the SF6 / N2 mixture can still maintain good insulation performance. By reasonably adjusting the SF6 content, the needs of electrical equipment with different voltage levels and insulation requirements can be met. Moreover, SF6 and N2 molecules interact in the mixture to produce a synergistic effect. The presence of N2 molecules can inhibit the decomposition and ionization of SF6 gas under the action of an electric field, reduce the probability of insulation failure, and further improve the insulation stability and reliability of the mixture. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a cross-sectional view of the present invention; Figure 2 This is the front view of the present invention; Figure 3 This is a structural diagram of the mating flange of the present invention; Figure 4 This is a structural diagram of the high-density PP insulating isolation board of the present invention; Figure 5 This is a structural diagram of the mobile tracked vehicle of the present invention; Figure 6 This is a structural diagram of the counterweight chassis of the present invention.

[0020] In the diagram: 1. Connectable inflatable insulating shell; 2. Mobile tracked vehicle; 201. Guide wheel; 202. Drive wheel; 203. Track assembly; 204. Tensioner wheel; 205. Counterweight chassis; 3. Ring-type shielded electrode; 4. Low-inductance impulse voltage generator; 401. Charging device; 402. Pulse capacitor; 403. Ball gap gas switch; 5. Large-scale power testing equipment; 6. Support base; 8. Insulating support component; 801. Vertical support rod; 802. High-density PP insulating isolation board; 9. Connecting metal conductor; 901. Impulse voltage output terminal; 902. Positive and negative charging terminals; 903. One-way valve output terminal; 10. Connecting flange; 1001. One-way valve; 1002. Charging port; 1003. Busbar port. Detailed Implementation

[0021] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0022] like Figures 1-6 As shown, the compact low-inductance impulse voltage generator device provided in this embodiment includes several dockable inflatable insulating housings 1 connected by docking flanges 10 and a mobile tracked vehicle 2 for moving the dockable inflatable insulating housings 1. The dockable inflatable insulating housings 1 can be directly docked with the test sample without sleeves. Unlike traditional tower-type impulse voltage generators, this invention adopts a dockable modular fully enclosed insulating barrel structure, which effectively controls the height of the device, facilitates transportation and installation, and allows for selection of the number of modular segments to change the voltage level according to the requirements of on-site testing. Since this invention is an inflatable impulse voltage generator, the device volume can be significantly controlled, effectively reducing the inherent inductance of the circuit and outputting a steeper waveform. An insulating support 8 is fixedly installed inside the dockable inflatable insulating housing 1. The insulating support 8 includes several vertically arranged vertical supports. The support rod 801 and several horizontally arranged high-density PP insulating isolation plates 802 are used to isolate and insulate the circuits of a single double-sided charging impulse voltage generator through the high-density PP insulating isolation plates 802. Several high-density PP insulating isolation plates 802 are arranged in parallel on the vertical support rod 801. The docking flange 10 and the one-way valve 1001 that maintains the air passage when docking with other sections, as well as the tower-type gas low-inductance impulse voltage generator 4 which uses gas as the insulating medium and is placed in the dockable inflatable insulating shell 1, can significantly reduce the size of the charging voltage generator, making the device smaller and lighter. Each high-density PP insulating isolation plate 802 has a ring-shaped shielding electrode 3 on its outer surface. The ring-shaped shielding electrode can effectively uniformize the electric field, greatly reduce the occurrence of local electric field concentration, and ensure internal insulation performance. In addition, a busbar port 1003 is provided in the middle of the docking flange 10, and a one-way valve 1001 and two symmetrically distributed charging ports 1002 are provided on the periphery of the busbar port 1003. The one-way valve 1001 is used to connect the two-section inflatable insulating housing 1 when the two sections are connected, so that the air pressure inside the two inflatable insulating housings 1 is the same, and the connecting flange 10 does not bear the gas pressure. The charging port 1002 is used for bilateral charging of the pulse capacitor between the two poles and is led out using a small basin insulator or insulating material. Busbar port 1003 is used to lead out the busbar, connect to the lower section or output directly. It is led out using basin-type insulators or insulating materials. The modular fully enclosed insulating barrel-type gas-insulated impulse voltage generator has the advantages of convenient transportation and compact structure. Each layer can be connected to the gas-insulated shell 1, which can be assembled and transported separately and then connected at the test site. The number of gas-insulated shell 1 sections that can be connected can also be selected according to the test voltage level, which is easy to adjust. Compared with the traditional impulse voltage generator, the output voltage of each layer in this invention can be accumulated to the lower section or directly output to the test object without passing through the high-voltage bushing. It is simple and convenient. The shell is filled with gas, which significantly reduces the weight and volume of the device, reduces the circuit inductance, and can output a steeper voltage waveform. Each single section of the inflatable insulating housing has a height not exceeding 3.5 m, meeting the height restrictions for transportation and facilitating overall transport. Each layer of high-density PP insulating isolation board 802 is equipped with a low-inductance impulse voltage generator 4. Each low-inductance impulse voltage generator 4 is an independent structure, used directly as a generator, or multiple sections can be connected together to generate higher voltages. The low-inductance impulse voltage generators 4 inside each layer of connectable gas-insulated housing 1 are all housed in a gas-insulated manner within the housing 1. Each low-inductance impulse voltage generator 4 includes two pulse capacitors 402 and a ball-gap gas switch 403. The ball-gap gas switch 403 is connected between the two pulse capacitors 402, forming a single double-sided charging impulse voltage generator circuit. The low-inductance impulse voltage generator 4 prevents surface flashover of the pulse capacitors 402 during charging and discharging, ensuring operational reliability. The nominal voltage of the device 402 is 100~140kV, which can meet the requirements of multiple short-circuit discharges. It is suitable for impulse voltage generating devices and ensures the safety and reliability of the device. Compared with traditional ball gap switches, the ball gap gas switch 403 has the characteristics of being less affected by external conditions and having good working stability. Compared with the mechanical method of adjusting the gap distance to change the breakdown voltage of traditional ball gap switches, the ball gap gas switch can control the breakdown voltage by adjusting the gas pressure, which is easy to control and finely adjust, thus significantly improving the synchronization of the device. The low inductance impulse voltage generator 4 is electrically connected to the charging device 401 through the isolation resistor. The charging device 401 is located at the bottom of the insulating support 8. The charging device 401 can charge the pulse capacitor on both positive and negative sides, and can be charged in a constant voltage or constant current manner, and the charging speed is easy to adjust. Therefore, this device can be directly connected to the test sample without the need for a sleeve. It adopts a fully enclosed insulating barrel structure with interlocking blocks, which effectively controls the height of the device, making it easy to transport and install. The number of blocks can also be selected according to the requirements of the field test to change the voltage level, effectively reducing the inherent inductance of the circuit and outputting a steeper waveform.

[0023] Furthermore, such as Figure 1As shown, several vertical support rods 801 all penetrate the high-density PP insulating isolation plate 802 and are fixedly connected to the vertical support rods 801. The pulse capacitor 402 is fixedly mounted on the vertical support rods 801. The high-density PP insulating isolation plate 802 is fixed on the vertical support rods 801. Each level has one layer of partition, which can provide structural support for the pulse capacitor 402 and separate each level of pulse capacitor 402. The vertical support rods 801 support the low-inductance impulse voltage generator 4 inside the dockable inflatable insulating shell 1. The diameter is 8cm~15cm and it has good mechanical and insulation properties. The vertical support rods 801 and the high-density PP insulating isolation plate 802 can be made of epoxy glass fiber. Each layer of the inflatable insulating shell 1 has three mating metal conductors 9 at the top and bottom, namely the impulse voltage output terminal 901, the positive and negative charging terminal 902, and the one-way valve connection terminal 903. The impulse voltage output terminal 901 is electrically connected to the bus port 1003, the positive and negative charging terminals 902 are electrically connected to the charging port 1002, and the one-way valve connection terminal 903 is electrically connected to the one-way valve 1001. The impulse voltage output terminal 901 is electrically connected to the last ring-type shielded electrode 3; The mating metal conductor 9 is supported by a basin-type insulator or insulating material on a mating inflatable insulating shell 1, integrating multiple functional interfaces into a limited space. This makes the entire device compact, saves space, and facilitates installation and layout within a limited space, improving the space utilization of the equipment. In addition, different functional ports can be designed, manufactured, and tested independently. During assembly, each module only needs to be connected according to requirements, which improves production efficiency and reduces production costs. At the same time, the basin-type insulator or insulating material can be selected and designed according to actual needs to adapt to different working environments and electrical requirements, protecting the stability of the mating metal conductor and the entire device. The bottom of the insulating support 8 is connected to the support base 6, which is fixedly mounted on the inflatable insulating shell 1. The charging device 401 is located between the support base 6 and the inflatable insulating shell 1. The device base 6 is used to support the tower-type gas-insulated impulse voltage generator and is connected to the charging device 401. The charging device 401 can charge the pulse capacitor on both positive and negative sides, using constant voltage or constant current charging, and the charging speed is easy to adjust.

[0024] Furthermore, such as Figure 1 As shown, the interior of the dockable inflatable insulating housing 1 uses pure SF6 gas and an SF6 / N2 mixture as the gaseous insulating medium within the dockable inflatable insulating housing 1. The SF6 content in the SF6 / N2 mixture ranges from 15% to 95%. The internal inflation pressure of the inflatable insulating housing 1 is between 0.15 MPa and 0.2 MPa. The inflation pressure of the SF6 / N2 mixed gas is higher than that of SF6. SF6 gas has extremely high insulation strength and a stable molecular structure. It is not easily ionized under the action of an electric field, which can effectively prevent current leakage and flashover. When the SF6 content is between 15% and 95%, the SF6 / N2 mixed gas can still maintain good insulation performance. By reasonably adjusting the SF6 content, the needs of electrical equipment with different voltage levels and insulation requirements can be met. Moreover, SF6 and N2 molecules interact in the mixed gas to produce a synergistic effect. The presence of N2 molecules can inhibit the decomposition and ionization of SF6 gas under the action of an electric field, reduce the probability of insulation failure, and further improve the insulation stability and reliability of the mixed gas.

[0025] Furthermore, such as Figure 5 and Figure 6 As shown, the mobile tracked vehicle 2 is equipped with a guide wheel 201 and a drive wheel 202. The guide wheel 201 is equipped with a track assembly 203. The guide wheel 201 and the drive wheel 202 are symmetrically arranged in the mobile tracked vehicle 2. This symmetrical layout helps to maintain the stability of the vehicle and reduce swaying and deviation during the driving process. A tension wheel 204 is provided between the symmetrical guide wheel 201 and the drive wheel 202. The tension wheel 204 can adjust the tension of the track assembly 203 to ensure that the track always maintains an appropriate tension. This avoids the track assembly 203 from being too loose, which may cause derailment, or too tight, which may increase driving resistance, thereby ensuring the smoothness and reliability of the vehicle. A travel reducer is sleeved in the middle of the drive wheel 202. The travel reducer can reduce the power of the engine and increase the torque, so that the drive wheel can obtain sufficient torque to drive the vehicle, improve the power transmission efficiency, and ensure that the vehicle can obtain good power performance under different working conditions. A counterweight chassis 205 is provided between the mobile tracked vehicles 2. A large power testing device 5 is fixed on the counterweight chassis 205. The large power testing device 5 is fixedly connected to the bottom dockable inflatable insulating shell 1. The counterweight chassis 205 can reasonably distribute the weight according to the weight and center of gravity position of the large power testing device 5, so that the center of gravity of the entire system is kept at a low and reasonable position, improving the stability of the vehicle in driving and stationary states. The fixed connection between the large power testing device 5 and the bottom dockable inflatable insulating shell 1 not only ensures the connection strength between the equipment and the vehicle, but also utilizes the insulation performance of the dockable inflatable insulating shell 1 to provide a good electrical insulation environment for the power testing device.

[0026] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0027] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes that element.

[0028] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A compact low-inductance impulse voltage generator device, comprising a plurality of dockable inflatable insulating housings (1) connected by docking flanges (10) and a mobile tracked vehicle (2) for moving the dockable inflatable insulating housings (1), characterized in that, An insulating support member (8) is fixedly installed inside the inflatable insulating shell (1). The insulating support member (8) includes several vertically arranged vertical support rods (801) and several horizontally arranged high-density PP insulating isolation plates (802). Several high-density PP insulating isolation plates (802) are arranged in parallel on the vertical support rods (801). Each high-density PP insulating isolation plate (802) has a ring-shaped shielding electrode (3) on its outer side. Each layer of the high-density PP insulating isolation plate (802) is provided with a low-inductance impulse voltage generator (4). The low-inductance impulse voltage generator (4) inside the dockable inflatable insulating shell (1) of each layer is placed inside the dockable inflatable insulating shell (1) in a gas-insulated form. The low-inductance impulse voltage generator (4) includes two pulse capacitors (402) and a ball gap gas switch (403). The ball gap gas switch (403) is connected between the two pulse capacitors (402) to form a single double-sided charging impulse voltage generator circuit. The low-inductance impulse voltage generator (4) is electrically connected to a charging device (401) through an isolation resistor. The charging device (401) is located at the bottom of the insulating support (8). The individual double-sided charging impulse voltage generator circuits are isolated and insulated from each other by the high-density PP insulating isolation plate (802).

2. The compact low-inductance impulse voltage generator device according to claim 1, characterized in that: Several vertical support rods (801) pass through the high-density PP insulating isolation plate (802) and are fixedly connected to the vertical support rods (801). The pulse capacitor (402) is fixedly mounted on the vertical support rods (801).

3. The compact low-inductance impulse voltage generator device according to claim 1, characterized in that: The docking flange (10) is provided with a busbar port (1003) in the middle, and a one-way valve (1001) and two symmetrically distributed charging ports (1002) are provided on the periphery of the busbar port (1003). The one-way valve (1001) is used to connect the two dockable inflatable insulating shells (1) when the two sections are docked, so that the air pressure inside the two dockable inflatable insulating shells (1) is the same, and the docking flange (10) does not bear gas pressure. The charging port (1002) is used for bilateral charging of the pulse capacitor between the two poles and is led out by a small basin insulator or insulating material; The busbar port (1003) is used to lead out the busbar, connect to the next section or output directly, and is led out using basin-type insulators or insulating materials.

4. A compact low-inductance impulse voltage generator device according to claim 1, characterized in that: Each of the aforementioned low-inductance impulse voltage generators (4) is an independent structure, used directly as a generator, or used in combination in multiple sections to generate higher voltage.

5. A compact low-inductance impulse voltage generator device according to claim 3, characterized in that: Each of the top and bottom of the dockable inflatable insulating shell (1) has three docking metal conductors (9), namely, the impulse voltage output terminal (901), the positive and negative charging terminal (902), and the one-way valve connection terminal (903). The impulse voltage output terminal (901) is electrically connected to the bus port (1003), the positive and negative charging terminals (902) are electrically connected to the charging port (1002), and the one-way valve connection terminal (903) is electrically connected to the one-way valve (1001). The impulse voltage output terminal (901) is electrically connected to the ring-shaped shielded electrode (3) in the last set; The mating metal conductor (9) is supported by the basin insulator or insulating material on the mating inflatable insulating shell (1).

6. A compact low-inductance impulse voltage generator device according to claim 1, characterized in that: The bottom of the insulating support (8) is connected to a support base (6), the support base (6) is fixedly installed on the dockable inflatable insulating shell (1), and the charging device (401) is installed between the support base (6) and the dockable inflatable insulating shell (1).

7. A compact low-inductance impulse voltage generator device according to claim 1, characterized in that: The charging device (401) can charge the pulse capacitor on both the positive and negative sides, using constant voltage or constant current charging, and the charging speed is easy to adjust.

8. A compact low-inductance impulse voltage generator device according to claim 1, characterized in that: The interior of the dockable inflatable insulating shell (1) uses pure SF6 gas and SF6 / N2 mixed gas as the gaseous insulating medium inside the dockable inflatable insulating shell (1), wherein, The SF6 content in the SF6 / N2 mixture ranges from 15% to 95%. The internal inflation pressure of the inflatable insulating shell (1) is between 0.15 MPa and 0.2 MPa, and the inflation pressure of the SF6 / N2 mixed gas is higher than that of SF6.

9. A compact low-inductance impulse voltage generator device according to claim 1, characterized in that: The mobile tracked vehicle (2) is provided with a guide wheel (201) and a drive wheel (202). The guide wheel (201) is provided with a track assembly (203). The guide wheel (201) and the drive wheel (202) are symmetrically arranged in the mobile tracked vehicle (2). A tension wheel (204) is provided between the symmetrical guide wheel (201) and the drive wheel (202).

10. A compact low-inductance impulse voltage generator device according to claim 9, characterized in that: The drive wheel (202) is fitted with a travel reducer in the middle, and the mobile tracked vehicle (2) is provided with a counterweight chassis (205). A large power test device (5) is fixed on the counterweight chassis (205), and the large power test device (5) is fixedly connected to the bottommost insulated inflatable shell (1).

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