A breakdown triggering system, method and related apparatus for an air gap

Abstract

This application discloses a breakdown triggering system, method, and related equipment for air gaps, relating to the field of power equipment technology. The system includes a plasma jet device for generating a plasma jet in response to a pulse signal; an impact control module for responding to a second trigger signal sent by a fiber optic controller to an external impact generator, controlling the external impact generator to superimpose an impact voltage waveform on a DC high voltage base; and a breakdown triggering module for controlling the plasma jet to trigger the breakdown of the air gap under the action of the impact voltage waveform. This application employs a circuit architecture with dual-path pulse loop collaborative triggering, inducing arcing in the main discharge cavity through ignition in the ignition cavity to generate a high-speed plasma jet, thus improving triggering reliability. The triggering circuit of this application can be directly integrated inside the air gap electrode, operating at the same potential as the electrode, without requiring additional insulation support structures, and is suitable for the installation and insulation requirements of high-voltage joint tests.

Description

Technical Field

[0001] This application relates to the field of power equipment technology, and in particular to a breakdown triggering system, method and related equipment for air gaps. Background Technology

[0002] With the rapid development of ultra-high voltage AC / DC transmission projects, system overvoltage suppression and insulation coordination have become core issues affecting the safe and stable operation of the power grid. Controllable surge arresters, as flexible overvoltage limiting devices, can dynamically adjust their volt-ampere characteristics through the rapid switching of internal series air gaps: increasing the arrester's operating potential and reducing the aging rate of the valve plates during normal system operation; and rapidly breaking down the gaps and activating all current-limiting components when overvoltage occurs. This achieves efficient suppression of transient overvoltages such as lightning strikes and switching impulses, and has extremely high engineering application value in scenarios such as ultra-high voltage DC converter stations and GIS substations.

[0003] The air gap is the core actuator for switching the operating state of a controllable surge arrester. Its breakdown reliability and action delay directly determine the voltage limiting performance and response speed of the controllable surge arrester. To withstand the continuous operating voltage of the system, the series air gap of the controllable surge arrester must have sufficient insulation spacing to prevent false breakdown under the normal operating voltage of the system, and to enable rapid and reliable conduction after the superposition of impulse waveforms. In the natural breakdown mode, the air gap breakdown voltage is greatly affected by environmental factors such as air pressure, humidity, and electrode surface condition, resulting in high breakdown dispersion and making it impossible to accurately match the overvoltage protection threshold. Traditional needle electrode contact triggering schemes expose the trigger electrode to the strong electric field of the main gap, which is prone to ablation and electric field distortion during long-term operation. Moreover, due to the limitation of triggering energy, it is only suitable for short-gap air gaps, and the triggering reliability for long-distance air gaps of hundreds of millimeters is extremely low. Although non-contact triggering schemes such as laser and ultraviolet light avoid the electrode contact problem, the equipment cost is high and the daily maintenance is difficult, making it difficult to meet the needs of large-scale engineering applications.

[0004] In related technologies, ball gap triggering circuits are mostly externally mounted, requiring additional high-voltage insulation support and isolation structures. At the same time, external circuits are in a strong electromagnetic interference environment, making them susceptible to problems such as false triggering and trigger failure due to transient overvoltage and spatial electromagnetic radiation interference. Summary of the Invention

[0005] The main objective of this application is to provide a breakdown triggering system, method, and related equipment for air gaps, aiming to solve the problems in the background art.

[0006] To achieve the above objectives, one aspect of this application proposes a breakdown triggering system for an air gap, the system comprising: The trigger circuit is used to respond to the first trigger signal issued by the fiber optic controller and output a pulse signal. A plasma jetting device is used to generate a plasma jet in response to the pulse signal; The impulse control module is used to respond to the second trigger signal sent by the fiber optic controller to the external impulse generator and control the external impulse generator to superimpose an impulse voltage waveform on the basis of DC high voltage. The breakdown trigger module is used to trigger the plasma jet to break down in the air sphere gap under the action of the impact voltage waveform.

[0007] In some embodiments, the trigger circuit includes a charging module and a discharging module, the discharging module including a first pulse circuit and a second pulse circuit, and before outputting the pulse signal in response to the first trigger signal issued by the fiber optic controller, it further includes: The charging voltage of the charging module is set according to the preset air gap spacing and test voltage level; Based on the charging voltage, the energy storage capacitor in the first pulse circuit and the trigger capacitor in the second pulse circuit are precharged respectively, and a DC high voltage is applied to both ends of the air sphere gap.

[0008] In some embodiments, the response to the first trigger signal issued by the fiber optic controller to output a pulse signal specifically includes: A first trigger signal is sent to the thyristor in the first pulse circuit via an optical fiber controller; Based on the first trigger signal, the thyristor of the first pulse circuit is turned on, and the energy storage capacitor forms a discharge circuit through the parallel freewheeling resistor. The discharge circuit puts the first pulse circuit into a standby state. After the thyristor in the first pulse circuit is turned on, the thyristor in the second pulse circuit, which has been pre-charged, is turned on after a delay. The trigger capacitor discharges to the primary side of the pulse transformer via a thyristor. After the secondary side of the pulse transformer is induced to boost voltage, a pulse signal is output.

[0009] In some embodiments, the plasma jetting device includes an ignition chamber and a main discharge chamber, and the generation of a plasma jet in response to the pulse signal specifically includes: The pulse signal is input into the ignition chamber, and an electric spark is generated in the ignition chamber; The electric spark induces surface breakdown of the main discharge cavity, causing the energy storage capacitor in standby mode to release a current pulse through the main discharge cavity. The current pulse ablates the insulating gas-generating material in the main discharge cavity, generating a plasma jet.

[0010] In some embodiments, the charging module includes an AC power source, a step-up transformer, a charging switch, and a rectifier bridge. The pre-charging of the energy storage capacitor in the first pulse circuit and the trigger capacitor in the second pulse circuit based on the charging voltage specifically includes: The trigger circuit is connected to an AC power supply. The AC power supply is stepped up by a step-up transformer and converted into a DC voltage by a rectifier bridge. The value of the DC voltage is then adjusted to the charging voltage. The charging voltage is used to precharge the energy storage capacitor in the first pulse circuit and the trigger capacitor in the second pulse circuit via the charging switch.

[0011] In some embodiments, the first pulse circuit includes an energy storage capacitor, a thyristor, and a freewheeling resistor, and the second pulse circuit includes a trigger capacitor, a thyristor, a freewheeling diode, a pulse transformer, and a discharge resistor.

[0012] In some embodiments, the plasma jetting device is adjusted to a single-sided jetting structure or a double-sided jetting structure according to the air gap distance, the test voltage amplitude, and the polarity.

[0013] To achieve the above objectives, one aspect of this application proposes a breakdown triggering method for air gaps, the method comprising: In response to the first trigger signal from the fiber optic controller, a pulse signal is output. In response to the pulse signal, a plasma jet is generated; In response to the second trigger signal sent by the fiber optic controller to the external impulse generator, the external impulse generator is controlled to superimpose an impulse voltage waveform on the basis of DC high voltage; Under the action of the impulse voltage waveform, the plasma jet is triggered to break down in the air sphere gap.

[0014] To achieve the above objectives, one aspect of this application provides an electronic device, characterized in that the electronic device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the above-described method.

[0015] To achieve the above objectives, one aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method.

[0016] The embodiments of this application include at least the following beneficial effects: This application provides a breakdown triggering system, method, and related equipment for air gaps. The triggering circuit adopts a circuit architecture of dual-path pulse circuit coordinated triggering. The ignition cavity ignites and induces the main discharge cavity to generate a high-speed plasma jet, thereby improving the reliability of triggering. The trigger circuit of this application can be directly integrated into the air gap electrode and operate at the same potential as the electrode without the need for additional insulation support structure, thus adapting to the installation and insulation requirements of high voltage level joint tests. The trigger circuit of this application is simple and clear, and the core components are all mature industrial devices. The charging and discharging circuits are designed independently, which facilitates parameter adjustment and maintenance. It is compatible with long-distance ball gap triggering scenarios with different spacing and voltage levels, and has strong engineering applicability. Attached Figure Description

[0017] Figure 1 This is a block diagram of a breakdown triggering system for an air gap provided in an embodiment of this application; Figure 2 This is a structural diagram of the trigger circuit provided in the embodiments of this application; Figure 3 This is a schematic diagram of the first pulse circuit and the second pulse circuit provided in the embodiments of this application; Figure 4 This is a structural diagram of the plasma jetting device provided in the embodiments of this application; Figure 5 This is a schematic diagram of the trigger circuit and plasma jet device integrated inside the spherical gap electrode according to an embodiment of this application; Figure 6 This is a structural diagram of the breakdown triggering system provided in this application embodiment, distributed on the high and low voltage sides. Figure 7 This is a flowchart of a breakdown triggering method for an air gap provided in an embodiment of this application.

[0018] Figure descriptions: 1. Ground electrode; 2. Intermediate electrode; 3. Main discharge cavity; 4. Ignition cavity; 5. Trigger needle electrode; 6. Epoxy pressure plate; 7. Energy storage capacitor; 8. Trigger capacitor. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit it. In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with those of this application; they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this application as detailed in the appended claims.

[0020] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various concepts, but unless otherwise stated, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another. For example, without departing from the scope of the embodiments of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the words “if,” “when,” or “in response to a determination” as used herein may be interpreted as “when…” or “when…” or “in response to a determination.”

[0021] As used in this application, the terms "at least one", "multiple", "each", "any", etc., "at least one" includes one, two or more, "multiple" includes two or more, "each" refers to each of the corresponding multiples, and "any" refers to any one of the multiples.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0023] refer to Figure 1 As shown, one embodiment of this application proposes a breakdown triggering system for an air gap, comprising: The trigger circuit is used to respond to the first trigger signal issued by the fiber optic controller and output a pulse signal. A plasma jetting device is used to generate a plasma jet in response to the pulse signal; The impulse control module is used to respond to the second trigger signal sent by the fiber optic controller to the external impulse generator and control the external impulse generator to superimpose an impulse voltage waveform on the basis of DC high voltage. The breakdown trigger module is used to trigger the plasma jet to break down in the air sphere gap under the action of the impact voltage waveform.

[0024] For details, please refer to Figure 2 and Figure 3 As shown, the trigger circuit includes a charging module and a discharging module; The charging module includes an AC power source, a step-up transformer, a charging switch and a rectifier bridge, and the discharging module includes a first pulse circuit and a second pulse circuit. The first pulse circuit includes a first pulse generation circuit consisting of an energy storage capacitor 7, a thyristor, and a freewheeling resistor. The second pulse circuit includes a trigger capacitor 8, a thyristor, a freewheeling diode, a pulse transformer, and a discharge resistor. The trigger circuit is electrically connected to the plasma jetting device.

[0025] Furthermore, the input signals of the trigger circuit include three timing control signals transmitted via optical fiber from an external AC power supply and an external ground potential control terminal, wherein the three timing control signals are output through an optical fiber controller.

[0026] For details, please refer to Figure 4 As shown, the plasma jetting device of this application includes a ground electrode 1, an intermediate electrode 2, a main discharge cavity 3, an ignition cavity 4, a trigger needle electrode 5, and an epoxy pressure plate 6. Specifically, before outputting a pulse signal in response to the first trigger signal from the fiber optic controller, the process also includes: The charging voltage of the charging module is set according to the preset air gap spacing and test voltage level; The trigger circuit receives an external AC power input. The trigger circuit is connected to the AC power supply. The AC power supply is stepped up by a step-up transformer and then converted into DC voltage by a rectifier bridge. The value of the DC voltage is adjusted to reach the charging voltage. Based on the charging voltage, the energy storage capacitor 7 in the first pulse circuit and the trigger capacitor 8 in the second pulse circuit are precharged so that both capacitors reach the preset voltage value, completing the energy storage before pulse output, and a DC high voltage is applied to both ends of the air sphere gap to establish the basic bias electric field.

[0027] The bias electric field establishes a pre-polarized field between the spheres. When the plasma jet is ejected, this bias electric field accelerates the directional movement of charged particles in the jet, helping the jet overcome air resistance and develop towards the opposite electrode. At the same time, it prevents the jet from radially diffusing, maintains the jet's slender shape, and provides a better seed channel for subsequent streams.

[0028] In this application, the test voltage level includes a combination of same and opposite polarity conditions of 100kV DC voltage superimposed with MV lightning impulse and MV switching impulse. The corresponding air sphere gap is 60cm-1cm. The spray device can be adjusted to a single-sided spray or double-sided spray structure according to the gap distance, test voltage amplitude, polarity and other factors. The energy storage capacitor value and charging voltage value of the trigger circuit can also be adjusted accordingly.

[0029] When an MV-level impulse voltage is superimposed on a DC bias electric field, the actual electric field distribution between the spheres is an algebraic superposition of the impulse voltage waveform and the DC bias voltage. The presence of the DC bias means that the spheres are already charged before the impulse voltage arrives, which is equivalent to reducing the net incremental threshold required for impulse breakdown, making the streamer start faster and develop more stably.

[0030] Specifically, in response to the first trigger signal issued by the fiber optic controller, a pulse signal is output, including: A first trigger signal is sent to the thyristor in the first pulse circuit via an optical fiber controller; Based on the first trigger signal, the thyristor of the first pulse circuit is turned on, and the energy storage capacitor 7 forms a slow discharge circuit through the parallel freewheeling resistor, so that the thyristor is kept in the forward conduction state. At the same time, the voltage across the energy storage capacitor 7 is kept in a high standby state, waiting for the main discharge cavity to form a discharge channel. After the thyristor in the first pulse circuit is turned on, the thyristor in the second pulse circuit, which has been pre-charged, is turned on after a delay. The trigger capacitor 8 discharges to the primary side of the pulse transformer via the thyristor. After the secondary side of the pulse transformer is induced to boost voltage, it outputs a pulse signal.

[0031] After generating a pulse signal, the pulse signal is input into the ignition chamber, and an electric spark is generated in the ignition chamber; The electric spark induces surface breakdown of the main discharge cavity, causing the energy storage capacitor 7, which is in standby mode, to release a current pulse through the main discharge cavity. The current pulse ablates the insulating gas-generating material in the main discharge cavity, generating a high-speed plasma jet.

[0032] Furthermore, after the plasma jet is ejected and develops to the preset delay, a second trigger signal is sent to the external impact generator through the fiber optic controller to control the external impact generator to superimpose an impact voltage waveform on the basis of DC high voltage. The plasma jet, under the action of the impact voltage waveform, induces the initiation and development of the jet in the long-distance air gap, thereby achieving rapid and reliable breakdown of the gap.

[0033] refer to Figure 5 As shown, the trigger circuit of this application adopts a fully enclosed insulating encapsulation structure. The trigger circuit and plasma jet device are embedded inside a 1-meter diameter spherical gap electrode and installed at the same potential as the electrode, which is suitable for the high-voltage operating environment of DC superimposed impact test.

[0034] refer to Figure 6 As shown, this application can be further applied to both high and low voltage sides. When applied to both high and low voltage sides, the triggering circuits and plasma jet devices on both sides are kept in sync and are synchronously controlled by the same fiber optic controller.

[0035] Furthermore, in some embodiments, the fiber optic controller is integrated into the control unit, and the signal output terminal of the control unit is connected to the thyristor control electrode of the two pulse generation circuits respectively; the trigger signal is transmitted to the control unit through the fiber optic cable to achieve electrical isolation between the ground potential control terminal and the high potential spherical gap electrode, and the trigger time can be coordinated with the external impact generator.

[0036] Furthermore, in some embodiments, this application also includes a power module for providing AC power to the trigger circuit, adapting to installation scenarios where the spherical gap electrode is suspended at a high potential.

[0037] refer to Figure 7 As shown in the embodiment of this application, a breakdown triggering method for an air gap is also provided, the method comprising: In response to the first trigger signal from the fiber optic controller, a pulse signal is output. In response to the pulse signal, a plasma jet is generated; In response to the second trigger signal sent by the fiber optic controller to the external impulse generator, the external impulse generator is controlled to superimpose an impulse voltage waveform on the basis of DC high voltage; Under the action of the impulse voltage waveform, the plasma jet is triggered to break down in the air sphere gap.

[0038] The methods provided in this application relate to the field of information technology. The methods provided in this application can be applied to terminals, servers, or software running on either a terminal or a server. In some embodiments, the terminal can be a smartphone, tablet, laptop, desktop computer, smart speaker, smartwatch, or in-vehicle terminal, but is not limited to these. The server can be configured as an independent physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms. The server can also be a node server in a blockchain network. The software can be an application implementing the method, but is not limited to the above forms.

[0039] This application can be used in a wide variety of general-purpose or special-purpose computer system environments or configurations. Examples include: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics devices, network PCs, minicomputers, mainframe computers, and distributed computing environments including any of the above systems or devices. This application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform specific tasks or implement specific abstract data types. This application can also be practiced in distributed computing environments where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0040] It should be noted that in all specific embodiments of this application, when processing data related to user identity or characteristics, such as user information, user behavior data, user historical data, and user location information, user permission or consent is obtained first. Furthermore, the collection, use, and processing of this data comply with relevant laws, regulations, and standards. In addition, when embodiments of this application require access to sensitive personal information of users, separate permission or consent from the user is obtained through pop-ups or redirection to confirmation pages. Only after obtaining the user's separate permission or consent is the necessary user-related data required for the proper functioning of these embodiments acquired.

[0041] It is understood that the content of the above method embodiments is applicable to the present device embodiments. The specific functions implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0042] This application also provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the above-described method. This electronic device can be any smart terminal, including tablet computers, in-vehicle computers, etc.

[0043] It is understood that the content of the above method embodiments is applicable to this device embodiment. The specific functions implemented by this device embodiment are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0044] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method.

[0045] It is understood that the content of the above method embodiments is applicable to this storage medium embodiment. The specific functions implemented in this storage medium embodiment are the same as those in the above method embodiments, and the beneficial effects achieved are also the same as those achieved in the above method embodiments.

[0046] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0047] It is understood that the content of the above method embodiments is applicable to the embodiments of this program product. The specific functions implemented by the embodiments of this program product are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0048] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0049] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0050] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0051] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0052] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0053] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0054] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0055] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0056] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0057] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0058] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0059] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A breakdown triggering system for an air sphere gap, characterized in that, The system includes: The trigger circuit is used to respond to the first trigger signal issued by the fiber optic controller and output a pulse signal. A plasma jetting device is used to generate a plasma jet in response to the pulse signal; The impulse control module is used to respond to the second trigger signal sent by the fiber optic controller to the external impulse generator and control the external impulse generator to superimpose an impulse voltage waveform on the basis of DC high voltage. The breakdown trigger module is used to trigger the plasma jet to break down in the air sphere gap under the action of the impact voltage waveform.

2. The breakdown triggering system for an air sphere gap according to claim 1, characterized in that, The trigger circuit includes a charging module and a discharging module. The discharging module includes a first pulse circuit and a second pulse circuit. Before outputting the pulse signal in response to the first trigger signal issued by the fiber optic controller, the circuit further includes: The charging voltage of the charging module is set according to the preset air gap spacing and test voltage level; Based on the charging voltage, the energy storage capacitor in the first pulse circuit and the trigger capacitor in the second pulse circuit are precharged respectively, and a DC high voltage is applied to both ends of the air sphere gap.

3. The breakdown triggering system for an air sphere gap according to claim 2, characterized in that, The response to the first trigger signal issued by the fiber optic controller outputs a pulse signal, specifically including: A first trigger signal is sent to the thyristor in the first pulse circuit via an optical fiber controller; Based on the first trigger signal, the thyristor of the first pulse circuit is turned on, and the energy storage capacitor forms a discharge circuit through the parallel freewheeling resistor. The discharge circuit puts the first pulse circuit into a standby state. After the thyristor in the first pulse circuit is turned on, the thyristor in the second pulse circuit, which has been pre-charged, is turned on after a delay. The trigger capacitor discharges to the primary side of the pulse transformer via a thyristor. After the secondary side of the pulse transformer is induced to boost voltage, a pulse signal is output.

4. The breakdown triggering system for an air sphere gap according to claim 3, characterized in that, The plasma jetting device includes an ignition chamber and a main discharge chamber. The process of generating a plasma jet in response to the pulse signal specifically includes: The pulse signal is input into the ignition chamber, and an electric spark is generated in the ignition chamber; The electric spark induces surface breakdown of the main discharge cavity, causing the energy storage capacitor in standby mode to release a current pulse through the main discharge cavity. The current pulse ablates the insulating gas-generating material in the main discharge cavity, generating a plasma jet.

5. The breakdown triggering system for an air sphere gap according to claim 2, characterized in that, The charging module includes an AC power source, a step-up transformer, a charging switch, and a rectifier bridge. The pre-charging of the energy storage capacitor in the first pulse circuit and the trigger capacitor in the second pulse circuit based on the charging voltage specifically includes: The trigger circuit is connected to an AC power supply. The AC power supply is stepped up by a step-up transformer and converted into a DC voltage by a rectifier bridge. The value of the DC voltage is then adjusted to the charging voltage. The charging voltage is used to precharge the energy storage capacitor in the first pulse circuit and the trigger capacitor in the second pulse circuit via the charging switch.

6. The breakdown triggering system for an air sphere gap according to claim 2, characterized in that, The first pulse circuit includes an energy storage capacitor, a thyristor, and a freewheeling resistor, while the second pulse circuit includes a trigger capacitor, a thyristor, a freewheeling diode, a pulse transformer, and a discharge resistor.

7. The breakdown triggering system for an air sphere gap according to claim 1, characterized in that, The plasma jetting device is adjusted to either a single-sided jetting structure or a double-sided jetting structure according to the air gap distance, test voltage amplitude, and polarity.

8. A method for triggering breakdown in an air gap, characterized in that, The method includes: In response to the first trigger signal from the fiber optic controller, a pulse signal is output. In response to the pulse signal, a plasma jet is generated; In response to the second trigger signal sent by the fiber optic controller to the external impulse generator, the external impulse generator is controlled to superimpose an impulse voltage waveform on the basis of DC high voltage; Under the action of the impulse voltage waveform, the plasma jet is triggered to break down in the air sphere gap.

9. An electronic device, characterized in that, The electronic device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the method of claim 8.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the method of claim 8.

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