Multi-waveform adjustable discharge test system

Abstract

The invention discloses a discharge test system capable of regulating and controlling multiple waveforms. The discharge test system comprises an energy storage module, a waveform regulation and control module, a discharge switch and tested equipment which are connected in series, the output end of the energy storage module is connected with the input end of the waveform regulation and control module, the output end of the waveform regulation and control module is connected with the input end of the discharge switch, and the output end of the discharge switch is connected with the input end of the tested equipment to form a discharge test loop; the energy storage module comprises a plurality of capacitor banks which are connected in parallel; the waveform regulation and control module comprises a wave modulation unit, and output of different waveforms is realized by controlling the wave modulation unit; and the discharge switch is used for orderly releasing the electric energy in the energy storage module to the tested equipment. According to the invention, various lightning shock waveforms can be simulated, and the accuracy and comprehensiveness of test results are improved.

Description

Technical Field

[0001] This application relates to the technical field of lightning protection testing, and particularly to a discharge testing system with adjustable multi-waveforms. Background Art

[0002] As a powerful threat in nature, lightning can release energy that may cause equipment malfunction or even damage. In particular, the damage caused by the indirect effect of lightning is often more concealed and difficult to detect. Therefore, it is particularly important to develop efficient lightning protection measures, and the simulation of the indirect effect of lightning has become a key link in evaluating the protection effectiveness of equipment.

[0003] Currently, the simulation of the indirect effect of lightning mainly relies on dedicated lightning simulators. These simulators generate current or voltage waveforms similar to lightning strikes to conduct tolerance tests on equipment.

[0004] In actual lightning scenarios, the induced surge current and voltage waveforms are diverse, and different waveform characteristics have different effects on equipment. However, traditional lightning simulators have many limitations. Most of them can only output a single waveform, usually a single current or voltage wave. Therefore, due to the single waveform output of ordinary lightning simulators, it is difficult to accurately simulate the complex electromagnetic induction phenomena in the actual lightning environment and cannot truly reflect the diversity of the impact of the indirect effect of lightning on different equipment, thus limiting the effectiveness and reliability of the test results.

[0005] To solve this problem, the present invention proposes a lightning simulation discharge system with adjustable multi-waveforms. Summary of the Invention

[0006] To solve the above problems, this application provides a discharge testing system with adjustable multi-waveforms, which can simulate various lightning strike waveforms to more accurately simulate the complex electromagnetic induction phenomena in the actual lightning environment, improve the accuracy and comprehensiveness of the test results, and ensure the effectiveness of equipment protection measures.

[0007] This application provides a discharge testing system with adjustable multi-waveforms, adopting the following technical solutions: A discharge testing system with adjustable multi-waveforms includes a control module, and also includes a series-connected energy storage module, waveform regulation module, discharge switch, and device under test; The output end of the energy storage module is connected to the input end of the waveform regulation module, the output end of the waveform regulation module is connected to the input end of the discharge switch, and the output end of the discharge switch is connected to the input end of the device under test, forming a discharge test loop; The energy storage module includes a plurality of capacitor banks connected in parallel; The control module is configured to control the conduction of the discharge switch, release the energy stored in the energy storage module to the device under test through the discharge test circuit, and form a pulse waveform on the device under test. The waveform regulation module is configured to adjust the pulse waveform.

[0008] By adopting the above technical solution, the energy storage module includes multiple parallel-connected capacitor banks, which can store a large amount of electric energy and achieve diverse waveform outputs through the waveform regulation module, ensuring that the discharge process can simulate the characteristics of complex real lightning signals. This discharge test system meets the simulation requirements in complex lightning environments, significantly improving the effectiveness and reliability of lightning indirect effect simulation.

[0009] Preferably, the energy storage module includes a first capacitor bank, the first capacitor bank includes two parallel-connected first capacitor units, each first capacitor unit includes two parallel-connected first capacitor subunits, and each first capacitor subunit includes five parallel-connected capacitors. Each first capacitor unit is further connected in parallel with a pneumatic unit, the pneumatic unit includes a single-acting cylinder, a grounding resistor, and a solenoid valve for driving the single-acting cylinder, and the single-acting cylinder is connected in series with the grounding resistor.

[0010] By adopting the above technical solution, the first capacitor bank is divided into secondary first capacitor units and more secondary first capacitor subunits. This multi-level parallel structure significantly improves the flexibility and stability of the system, enabling it to better adapt to the requirements of different waveform generation; each first capacitor subunit contains five parallel-connected capacitors, increasing the charge storage capacity and enhancing the system's energy output ability; at the same time, each first capacitor unit is equipped with a pneumatic unit, which realizes fast switching and precise control through a pneumatic method, effectively reducing interference and energy consumption during the discharge process, and ensuring the accuracy and consistency of waveform output. The above technical solution not only enhances the versatility of the system but also greatly improves the reliability and accuracy of lightning simulation tests.

[0011] Preferably, the energy storage module further includes a second capacitor bank, the second capacitor bank is connected in parallel with the first capacitor bank, and the second capacitor bank includes a parallel-connected second capacitor unit and a third capacitor unit. The second capacitor unit includes four parallel-connected second capacitor subunits, each second capacitor subunit is connected in series with a protection resistor, each second capacitor subunit includes three parallel-connected capacitors, the second capacitor unit is connected in parallel with two pneumatic units, and each pneumatic unit controls two second capacitor subunits. The third capacitor unit includes two third capacitor sub-units connected in parallel. Each of the third capacitor sub-units is connected in series with one of the protection resistors. Each of the third capacitor sub-units includes four capacitors connected in parallel, and a pneumatic unit is also connected in parallel to the third capacitor sub-unit.

[0012] By adopting the above technical solution, a second capacitor bank is added and connected in parallel with the first capacitor bank, further improving the power storage capacity of the system. The second capacitor sub-unit is connected in series with the protection resistor, effectively enhancing the safety and stability of the circuit. At the same time, through the control of the pneumatic unit, the selective access of some capacitor sub-units is realized, enhancing the accuracy of waveform regulation. The third capacitor sub-unit contains four capacitors connected in parallel, and is equipped with a separate protection resistor and pneumatic unit, which not only ensures a larger energy reserve, but also meets diverse test requirements through flexible configuration. The above technical solution significantly optimizes the system's ability to simulate complex lightning signals and the adaptation range, increasing the capacity and test flexibility of the energy storage module.

[0013] Preferably, the energy storage module further includes a third capacitor bank, and the first capacitor bank, the second capacitor bank, and the third capacitor bank are connected in parallel with each other; The third capacitor bank includes five fourth capacitor units connected in parallel. Each of the fourth capacitor units includes two fourth capacitor sub-units connected in parallel. The fourth capacitor sub-unit is connected in series with one of the protection resistors. Each of the fourth capacitor sub-units includes four capacitors connected in parallel; Each of the fourth capacitor units is also connected in parallel with a pneumatic unit.

[0014] By adopting the above technical solution, a third capacitor bank is added and connected in parallel with the first capacitor bank and the second capacitor bank, enhancing the overall capacity and flexibility of the energy storage module. The third capacitor bank is composed of five fourth capacitor units connected in parallel. Each fourth capacitor unit contains two fourth capacitor sub-units connected in parallel, and each fourth capacitor sub-unit is connected in series with a protection resistor, ensuring circuit safety while making the discharge process more controllable and capable of adapting to diverse waveform requirements. The above technical solution significantly improves the versatility and stability of the system, effectively supporting the requirements of multi-waveform output.

[0015] Preferably, the waveform regulation module includes a wave modulation unit for realizing different waveform outputs. The wave modulation unit includes a plurality of wave modulation resistors connected in parallel. The waveform regulation module further includes an adjustable inductor; The waveform regulation module is used to regulate the discharge current of the energy storage module to form various pulse waveforms.

[0016] By adopting the above technical solution, the waveform regulation module is provided with an adjustable inductor and a wave regulation unit composed of a plurality of parallel wave regulation resistors, which can accurately adjust the discharge current characteristics released by the energy storage module. Through the synergistic effect of the adjustable inductor and the wave regulation resistor, pulse waveforms of various shapes and amplitudes are generated. The flexibility and adaptability of the system are significantly improved, enabling the discharge test system to more accurately simulate the complex and diverse lightning signal characteristics, thereby enhancing the authenticity and reliability of the evaluation of the lightning indirect effect protection performance of equipment.

[0017] Preferably, the discharge test system further includes a Crowbar switch, one end of the Crowbar switch is connected between the wave regulation unit and the discharge switch, and the other end of the Crowbar switch is grounded; The Crowbar switch is connected in parallel with the waveform regulation module and the device under test to form a wave regulation loop.

[0018] By adopting the above technical solution, after introducing the Crowbar switch, when the system detects an abnormal situation, the Crowbar switch quickly conducts, discharging the energy in the circuit to the ground, avoiding damage to subsequent equipment caused by excessive transient voltage, and improving the safety and stability of the entire system; the Crowbar switch is connected in parallel with the waveform regulation module and the device under test to form a wave regulation loop, which can change the impedance characteristics of the loop under specific conditions, thereby finely adjusting the finally generated pulse waveform and making the test results closer to the actual situation.

[0019] Preferably, the discharge test system further includes a measurement and acquisition unit, the measurement and acquisition unit is connected in series in the discharge test loop, and the measurement and acquisition unit is used to acquire the parameters of the pulse waveform formed by the discharge test loop.

[0020] By adopting the above technical solution, using the measurement and acquisition unit to accurately acquire the pulse waveform parameters in the discharge test loop enables the system to have the ability to obtain waveform characteristic data in real time, further optimizing the analysis and verification process of the test results, further realizing the generation and monitoring of complex and diverse lightning signal waveforms, ensuring the data accuracy and reliability during the test process, and the application of the measurement and acquisition unit.

[0021] Preferably, the discharge test system further includes a self-made inductive resistance unit for open-circuit protection, and the self-made inductive resistance unit is connected in parallel with the device under test.

[0022] By adopting the above technical solution, the inductive self-made resistance unit is connected in parallel to the device under test, which can effectively prevent the overvoltage phenomenon caused by the circuit open circuit during the discharge test, avoid potential damage to the device under test, improve the safety and reliability of the entire discharge test system, and ensure the accuracy and effectiveness of the lightning indirect effect simulation in a complex electromagnetic environment.

[0023] In summary, the present application has at least the following beneficial effects: 1. The present application adopts an energy storage module including multiple parallel capacitor banks and a controllable waveform regulation module, which can generate diverse pulse waveforms, solves the problem that traditional lightning simulators can only output a single waveform, and significantly improves the reliability and accuracy of the test.

[0024] 2. In the present application, the multi-stage design in the energy storage module is combined with the orderly control of the discharge switch to achieve precise management of the energy characteristics of different waveforms, and enhance the system's ability to reproduce complex lightning indirect effects.

[0025] 3. The present application combines the application of the Crowbar switch and the measurement and acquisition unit to monitor and record key parameters during the discharge process in real time, improve the stability and reliability of the system, and further optimize the data support for the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the circuit schematic diagram of the adjustable multi-waveform discharge test system in this embodiment; Figure 2 is the circuit schematic diagram of the first capacitor bank in the adjustable multi-waveform discharge test system in this embodiment; Figure 3 is the circuit schematic diagram of the second capacitor bank in the adjustable multi-waveform discharge test system in this embodiment; Figure 4 is the circuit schematic diagram of the third capacitor bank in the adjustable multi-waveform discharge test system in this embodiment.

[0027] DESCRIPTION OF THE REFERENCE NUMERALS 1. Energy storage module; 2. Discharge switch; 3. Device under test; 4. Pneumatic unit; 5. Waveform regulation unit; 6. Adjustable inductor; 7. Crowbar switch; 8. Measurement and acquisition unit; 9. Inductive self-made resistance unit; 100. First capacitor bank; 101. First capacitor unit; 1011. First capacitor sub-unit; 200. Second capacitor bank; 201. Second capacitor unit; 2011. Second capacitor sub-unit; 202. Third capacitor unit; 2021. Third capacitor sub-unit; 300. Third capacitor bank; 301. Fourth capacitor unit; 3011. Fourth capacitor sub-unit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the following will further elaborate on the embodiments of this application in conjunction with the accompanying drawings.

[0029] An embodiment of this application provides a discharge test system with adjustable multi-waveforms, as Figure 1 shown. It includes a control module and also includes a discharge test circuit. The discharge test circuit includes an energy storage module 1, a waveform regulation module, a discharge switch 2, and a device under test 3 connected in series.

[0030] The energy storage module 1 is used to store electrical energy. Its output terminal is connected to the input terminal of the waveform regulation module. The output terminal of the waveform regulation module is connected to the input terminal of the discharge switch 2. The output terminal of the discharge switch 2 is connected to the input terminal of the device under test 3, finally forming a complete discharge test circuit.

[0031] In this discharge test circuit, the electrical energy released by the energy storage module 1 is adjusted in pulse waveform by the waveform regulation module and then orderly applied to the device under test 3 through the discharge switch 2 for testing.

[0032] The control module is used to control the conduction of the discharge switch 2, release the energy stored in the energy storage module 1 to the device under test 3 through the discharge test circuit, and form a pulse waveform on the device under test 3. The energy storage module 1 includes several capacitor banks, and the several capacitor banks are connected in parallel.

[0033] By connecting multiple capacitor banks in parallel, the total capacitance of the system can be flexibly adjusted to meet the requirements for discharge energy in different test scenarios.

[0034] In this discharge test system with adjustable multi-waveforms, the total capacitance is designed to be 160 uF, and the capacitors are grouped according to different waveform requirements. After the capacitors are grouped, different waveform regulation requirements can be achieved by connecting capacitor banks in parallel.

[0035] Specifically, in this embodiment, the energy storage module 1 includes a first capacitor bank 100, as Figure 2 shown. The first capacitor bank 100 includes two first capacitor units 101 connected in parallel. Each first capacitor unit 101 includes two first capacitor sub-units 1011 connected in parallel. Each first capacitor sub-unit 1011 includes five capacitors connected in parallel.

[0036] Each first capacitor unit 101 is also connected in parallel with a pneumatic unit 4. The pneumatic unit 4 includes a single-acting cylinder, a grounding resistor, and a solenoid valve for driving the single-acting cylinder. The single-acting cylinder is connected in series with the grounding resistor.

[0037] The grounding resistance plays a role in discharging, ensuring that when excessive current is generated by paralleling single-acting cylinders, the charge can be quickly discharged to prevent the capacitor from being damaged due to overload.

[0038] The solenoid valve is used to supply air to the single-acting cylinder, and the single-acting cylinder is pushed through the air circuit.

[0039] In the pneumatic unit 4, the action of the single-acting cylinder is controlled by the solenoid valve to adjust the discharge rate of the capacitor bank, ensuring the stable operation of the system under different test scenarios and meeting the requirements of precise energy control.

[0040] By setting the structure of the first capacitor bank 100 composed of multiple capacitor sub-units, capacitor units and the pneumatic unit 4, it is possible to achieve fine adjustment of the capacitance while ensuring the stability of the system, so as to meet the requirements for energy storage and discharge characteristics under different test conditions.

[0041] After receiving the control signal, the solenoid valve drives the single-acting cylinder to act, and then controls the connection or disconnection of the grounding resistor, thereby adjusting the working state of the capacitor unit and achieving precise control of the discharge process.

[0042] As Figure 2 shown, in this embodiment, the first capacitor bank 100 includes 20 capacitors, corresponding to the labels C1 - C20 in the figure respectively, and the specifications of the capacitors are 2μF, 160kV; The first capacitor bank 100 includes 2 single-acting cylinders and 2 grounding resistors. The 2 single-acting cylinders are SMC1 and SMC2 respectively, and the 2 grounding resistors are R40 and R41 respectively. The resistance value of each grounding resistor is 100k, and the power is 33kW; the first capacitor bank 100 includes 2 solenoid valves, which are kd1 and kd2 respectively.

[0043] In the system hardware structure, the capacitors are designed with a centripetal structure, horizontally opposed, with a small distributed inductance, and the distributed inductance of the overall discharge loop is less than 1uH; insulating plates are used to isolate between the capacitor groups to increase the withstand voltage between modules.

[0044] The first capacitor bank 100, as the basic capacitor bank, can meet the test requirements when used alone as a whole. According to the actual situation of the wave modulation test, more capacitor banks can be paralleled on the first capacitor bank 100 to achieve different wave modulation requirements.

[0045] In another specific implementable manner, the energy storage module 1 further includes a second capacitor bank 200, and the second capacitor bank 200 is paralleled with the first capacitor bank 100.

[0046] By connecting the second capacitor bank 200 in parallel with the first capacitor bank 100, the capacitance of the entire discharge test circuit is adjusted, which is beneficial to adjusting different waveform parameters.

[0047] As Figure 3 shown, the second capacitor bank 200 includes a second capacitor unit 201 and a third capacitor unit 202 connected in parallel.

[0048] The second capacitor unit 201 includes four second capacitor sub-units 2011 connected in parallel, and each second capacitor sub-unit 2011 is connected in series with a protection resistor.

[0049] Each second capacitor sub-unit 2011 includes three capacitors connected in parallel. Here, the protection resistor is used to protect the capacitors from explosion, whether it is the group explosion or the capacitor explosion. When capacitors are connected in parallel, if a capacitor breaks down internally and causes a short circuit, the remaining capacitors may discharge to this capacitor, resulting in capacitor explosion; when a protection resistor is connected in series, if the instantaneous current is relatively large, the protection resistor will fuse and disconnect the circuit, thereby disconnecting the capacitor and preventing explosion.

[0050] In this embodiment, the specification of the protection resistor is 2Ω.

[0051] The second capacitor unit 201 is connected in parallel with two pneumatic units 4, and each pneumatic unit 4 controls two second capacitor sub-units 2011.

[0052] In this embodiment, two second capacitor sub-units 2011 are grouped together and controlled by a parallel pneumatic unit 4. Therefore, the four second capacitor sub-units 2011 are finally divided into two groups, and each group is controlled by a pneumatic unit 4 respectively.

[0053] As Figure 3 shown, the third capacitor unit 202 includes two third capacitor sub-units 2021 connected in parallel, and each third capacitor sub-unit 2021 is connected in series with a protection resistor.

[0054] Each third capacitor sub-unit 2021 includes four capacitors connected in parallel, and a pneumatic unit 4 is also connected in parallel with the third capacitor sub-unit 2021.

[0055] Referring to Figure 3 , in the second capacitor bank 200, there are 20 capacitors, corresponding to the labels C21 - C40 in the figure respectively. The specification of the capacitors is 2μF, 160kV; among them, C21 - C32 belong to the second capacitor unit 201, and C33 - C40 belong to the third capacitor unit 202.

[0056] The second capacitor bank 200 includes 3 single-acting cylinders and 3 grounding resistors; the 3 single-acting cylinders correspond toFigure 4 Among the reference numerals SMC3, SMC4, and SMC5, the three grounding resistors are R42, R43, and R44 respectively. The resistance value of each grounding resistor is 33 kΩ and the power is 9 kW. Among them, R42 and R43 belong to the second capacitor unit 201, and R44 belongs to the third capacitor unit 202.

[0057] The second capacitor bank 200 includes three solenoid valves, namely kd3, kd4, and kd5. Among them, kd3 and kd4 belong to the second capacitor unit 201, and kd5 belongs to the third capacitor unit 202.

[0058] The second capacitor bank 200 includes six protective resistors, namely R22 - R27. The specification of each protective resistor is 2 Ω. Among them, R22 - R25 belong to the second capacitor unit 201, and R26 - R27 belong to the third capacitor unit 202.

[0059] The hardware structure design of the second capacitor bank 200 is the same as that of the first capacitor bank 100, which is convenient for the two to be connected in parallel. And an insulating isolation is adopted between the second capacitor bank 200 and the first capacitor bank 100, which is convenient for separate grouped use.

[0060] In another feasible specific embodiment, the energy storage module 1 further includes a third capacitor bank 300, and the first capacitor bank 100, the second capacitor bank 200, and the third capacitor bank 300 are connected in parallel with each other.

[0061] By connecting the third capacitor bank 300 in parallel with the first capacitor bank 100 and the second capacitor bank 200, the capacitance of the entire discharge test circuit is adjusted, which is beneficial to adjusting different waveform parameters.

[0062] As Figure 4 shown, the third capacitor bank 300 includes five parallel - connected fourth capacitor units 301. Each fourth capacitor unit 301 includes two parallel - connected fourth capacitor sub - units 3011. The fourth capacitor sub - unit 3011 is connected in series with a resistor. Each fourth capacitor sub - unit 3011 includes four parallel - connected capacitors; Each fourth capacitor unit 301 is also connected in parallel with a pneumatic unit 4.

[0063] As Figure 4 shown, in the third capacitor bank 300, it includes 40 capacitors, corresponding to Figure 4 the reference numerals C41 - C80 respectively. The specification of the capacitors is 2 μF, 160 kV; The third capacitor bank 300 includes five single - acting cylinders and five grounding resistors. The five single - acting cylinders correspond to Figure 4The reference numerals in the figure are SMC6 to SMC9, and the five grounding resistors are R45 - R49 respectively. The resistance value of each grounding resistor is 33 kΩ, and the power is 9 kW.

[0064] The third capacitor bank 300 includes five solenoid valves, namely kd6 - kd10; In this embodiment, two fourth capacitor sub - units 3011 are grouped together and controlled by a parallel pneumatic unit 4. Therefore, the ten fourth capacitor sub - units 3011 are finally divided into five groups, and each group is controlled by a pneumatic unit 4 respectively.

[0065] In an implementable specific manner, the waveform regulation module includes a wave - regulating unit 5 for realizing different waveform outputs, and different waveform outputs are realized by controlling the wave - regulating unit 5.

[0066] In this embodiment, the wave - regulating unit 5 includes a plurality of parallel wave - regulating resistors. The wave - regulating unit 5, the energy storage module 1 and the discharge switch 2 together form a specific circuit topology. By changing the number of wave - regulating resistors connected, the impedance characteristics of the circuit can be changed, and further the regulation of the discharge current can be realized to output pulse waveforms with different shapes and parameters.

[0067] As Figure 1 shown, in this embodiment, 30 wave - regulating resistors are connected in the wave - regulating unit 5.

[0068] The wave - regulating resistors and the grouping module are configured separately, and there is no need to adjust the resistance according to different capacitor banks.

[0069] In an implementable specific manner, the waveform regulation module further includes an adjustable inductor 6. The waveform regulation module is used to regulate the discharge current of the energy storage module 1 to form a variety of pulse waveforms.

[0070] The multiple wave - regulating resistors in the wave - regulating unit 5 cooperate with the adjustable inductor 6. By changing the connection state of the wave - regulating resistors and the inductive reactance characteristics of the adjustable inductor 6, filtering, shaping and other processing are carried out on the discharge current of the energy storage module 1, so as to form a variety of different pulse waveforms.

[0071] The discharge switch 2 can orderly release the electric energy in the energy storage module 1 to the device under test.

[0072] In this embodiment, the discharge switch 2 receives a specific control signal (not shown in the figure) to accurately control the on - off timing and duration of the discharge switch 2, and orderly releases the electric energy in the energy storage module 1 to the device under test 3.

[0073] When the discharge switch 2 is closed, the electric energy in the energy storage module 1 is released and consumed through the wave - regulating resistors and the adjustable inductor 6 in the waveform regulation module to form a pulse waveform.

[0074] As Figure 1 shown, the withstand voltage strength of the discharge gap of the discharge switch 2 in this embodiment can reach 240 kV.

[0075] In an implementable specific manner, the discharge test system further includes a Crowbar switch 7. As Figure 1 shown, one end of the Crowbar switch 7 is connected between the wave regulating unit 5 and the discharge switch 2, and the other end of the Crowbar switch 7 is grounded; the Crowbar switch 7 is connected in parallel with the waveform regulating module and the device under test 3 to form a wave regulating loop.

[0076] When overvoltage or other abnormal conditions occur in the system, the Crowbar switch 7 quickly closes under the action of a control signal, bypassing the excess energy to the ground terminal to protect the waveform regulating module and the device under test 3 from the impact of excessive voltage.

[0077] At the same time, the wave regulating loop formed by the parallel connection of the Crowbar switch 7 with the waveform regulating module and the device under test 3 can assist in adjusting parameters such as the pulse width of the output waveform during normal operation.

[0078] The Crowbar switch 7 used in this embodiment is an electronic Crowbar switch 7. It adopts a high-voltage fast diode component to realize the large-current automatic freewheeling function, and uses a preposed diode freewheeling feedback circuit to improve the capacitor utilization rate. The diodes are directly connected in parallel on the energy storage module 1, which can ensure that the voltage across the diodes will not change, effectively increasing the service life of the diodes.

[0079] In an implementable specific manner, the discharge test system further includes a measurement and acquisition unit 8. The measurement and acquisition unit 8 is connected in series in the discharge test loop. The measurement and acquisition unit 8 is used to acquire the parameters of the pulse waveform formed by the discharge test loop.

[0080] The parameters of the pulse waveform formed by the discharge test loop include voltage amplitude, current peak value, pulse width, frequency, etc. The measurement and acquisition unit 8 transmits these data to the control system, and the control system analyzes and processes the data, and then feedbacks to adjust the working states of the waveform regulating module and the discharge switch 2 to ensure the accuracy of the output waveform and the reliability of the test results.

[0081] In an implementable specific manner, as Figure 1 shown, the measurement and acquisition unit 8 includes 2 coils, namely P1 and P2. The coil P1 in the measurement and acquisition unit 8 is connected with a synchronous signal controller. In this embodiment, the discharge test system includes 4 sets of devices under test 3. The synchronous signal controller is used to realize the synchronous triggering and delayed output functions in the entire system composed of 4 sets of devices under test 3; The synchronization signal controller can collect the waveform trigger signals generated by each set of DUTs 3. After collecting the waveform trigger signal of a certain DUT 3, it performs delayed output according to the preset delay time to achieve synchronous discharge among the four waveforms generated by the four DUTs 3. In a single DUT 3, the synchronization signal controller is in a standby state.

[0082] In an implementable specific manner, the discharge test system further includes a self-made inductive resistance unit 9 for open-circuit protection, and the self-made inductive resistance unit 9 is connected in parallel with the DUT 3.

[0083] When an open-circuit occurs in the DUT 3, the self-made inductive resistance unit 9 automatically accesses the circuit. By using its own resistance and inductance characteristics, it restricts the current change in the circuit and prevents damage to other components of the system caused by the excessive voltage generated by the open circuit. When the DUT 3 is short-circuited, the remaining charge in the loop can be released through the self-made inductive resistance unit 9, thereby improving the stability and safety of the entire system.

[0084] This application can simulate a variety of different lightning impulse waveforms by setting multiple groups of adjustable parallel capacitor banks and combining with a waveform regulation module to control and release the electric energy in the capacitor banks, so as to more accurately simulate various complex electromagnetic induction phenomena in the actual lightning environment, improve the accuracy and comprehensiveness of the test results, and ensure the effectiveness of the equipment protection measures.

[0085] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A discharge test system capable of controlling multiple waveforms, characterized in that: It includes a control module, and also includes a series-connected energy storage module (1), a waveform control module, a discharge switch (2), and a device under test (3); The output end of the energy storage module (1) is connected to the input end of the waveform control module, the output end of the waveform control module is connected to the input end of the discharge switch (2), and the output end of the discharge switch (2) is connected to the input end of the device under test (3), so as to form a discharge test loop; The energy storage module (1) comprises a plurality of capacitor groups connected in parallel; The control module is used to control the conduction of the discharge switch (2), so as to release the energy stored in the energy storage module (1) to the device under test (3) through the discharge test circuit, thereby forming a pulse waveform on the device under test (3); The waveform control module is used to adjust the pulse waveform.

2. The adjustable multi-waveform discharge test system according to claim 1, characterized in that: The energy storage module (1) comprises a first capacitor group (100), the first capacitor group (100) comprises two first capacitor units (101) connected in parallel, each of the first capacitor units (101) comprises two first capacitor sub-units (1011) connected in parallel, and each of the first capacitor sub-units (1011) comprises five capacitors connected in parallel; Each of the first capacitor units (101) is also connected in parallel with a pneumatic unit (4), the pneumatic unit (4) comprising a single-acting cylinder, a grounding resistor and a solenoid valve for driving the single-acting cylinder, the single-acting cylinder being connected in series with the grounding resistor.

3. The adjustable multi-waveform discharge test system according to claim 2, characterized in that: The energy storage module (1) further comprises a second capacitor group (200), the second capacitor group (200) being connected in parallel with the first capacitor group (100), the second capacitor group (200) comprising a second capacitor unit (201) and a third capacitor unit (202) connected in parallel; The second capacitor unit (201) comprises four second capacitor sub-units (2011) connected in parallel, each of the second capacitor sub-units (2011) is connected in series with a protection resistor, each of the second capacitor sub-units (2011) comprises three capacitors connected in parallel, the second capacitor unit (201) is connected in parallel with two of the pneumatic units (4), and each of the pneumatic units (4) controls two of the second capacitor sub-units (2011); The third capacitor unit (202) comprises two third capacitor sub-units (2021) connected in parallel, each of the third capacitor sub-units (2021) is connected in series with a protection resistor, each of the third capacitor sub-units (2021) comprises four capacitors connected in parallel, and the third capacitor sub-unit (2021) is also connected in parallel with one of the pneumatic units (4).

4. The adjustable multi-waveform discharge test system according to claim 3, characterized in that: The energy storage module (1) further comprises a third capacitor group (300), wherein the first capacitor group (100), the second capacitor group (200) and the third capacitor group (300) are connected in parallel; The third capacitor group (300) comprises five fourth capacitor units (301) connected in parallel, each of the fourth capacitor units (301) comprises two fourth capacitor sub-units (3011) connected in parallel, the fourth capacitor sub-unit (3011) is connected in series with a protection resistor, and each of the fourth capacitor sub-units (3011) comprises four capacitors connected in parallel; Each of the fourth capacitor units (301) is also connected in parallel with one of the pneumatic units (4).

5. The adjustable multi-waveform discharge test system according to any one of claims 2 to 4, characterized in that: The waveform control module comprises a wave modulation unit (5) for realizing different waveform outputs, the wave modulation unit (5) comprises a plurality of wave modulation resistors connected in parallel, and the waveform control module further comprises an adjustable inductor (6); The waveform control module is used to control the discharge current of the energy storage module (1) to form a variety of pulse waveforms.

6. The adjustable multi-waveform discharge test system according to claim 5, characterized in that: The discharge test system further comprises a Crowbar switch (7), one end of the Crowbar switch (7) being connected between the modulation unit (5) and the discharge switch (2), and the other end of the Crowbar switch (7) being grounded; The Crowbar switch (7) is connected in parallel with the waveform control module and the device under test (3) to form a waveform control loop.

7. The adjustable multi-waveform discharge test system according to claim 5, characterized in that: The discharge test system further comprises a measurement acquisition unit (8), the measurement acquisition unit (8) being connected in series in the discharge test circuit, the measurement acquisition unit (8) being used to acquire parameters of the pulse waveform formed by the discharge test circuit.

8. The adjustable multi-waveform discharge test system according to claim 5, characterized in that: The discharge test system further comprises an inductive self-made resistance unit (9) for open circuit protection, wherein the inductive self-made resistance unit (9) is connected in parallel with the device under test (3).

Images