Device and method for detecting anti-electromagnetic pulse performance of power equipment

Abstract

The invention discloses an electrical equipment anti-electromagnetic pulse performance detection device comprising a high-voltage pulse signal generation unit used for generating a high-voltage pulse signal; the path switching unit is electrically connected with the high-voltage pulse signal generation unit and is used for conducting path switching on the high-voltage pulse signal so as to realize switching of interference modes; and one of the cable system conducted interference simulation unit and the tested equipment radiation simulation unit is selected to be electrically connected with the path switching unit. According to the device and method for detecting the anti-electromagnetic pulse performance of the power equipment, the use limitation caused by the fact that a traditional detection device can only independently detect one anti-interference performance of the power equipment or a cable is improved, path selection is carried out through the radio frequency relay, the signals can be transmitted to the current injection clamp or the broadband antenna, the interference mode is switched, and the detection efficiency is improved. The utilization rate of equipment is improved.

Description

Technical Field

[0001] This invention relates to the field of power equipment anti-interference performance testing technology, and more specifically, to a power equipment anti-electromagnetic pulse performance testing device and testing method. Background Technology

[0002] In modern power systems, the impact of high-altitude electromagnetic pulses (EMPs) on power equipment and cables is receiving increasing attention. EMPs are characterized by high amplitude, fast rise time, and wide frequency spectrum, capable of generating strong induced currents and voltages in power systems, thereby interfering with or even damaging power equipment. Therefore, accurate testing of the anti-interference performance of power equipment and cables is crucial.

[0003] Currently, existing electromagnetic pulse (EMP) immunity testing equipment for power equipment has many limitations. These devices are single-function, only capable of testing the conductivity of cables or the anti-interference performance of equipment. In other words, to comprehensively test the anti-interference performance of a complete power system including cables and equipment, different testing equipment must be used for each component. For example, specialized cable conductivity testing equipment is required to test cable conductivity, while a different anti-interference testing equipment is needed to test the anti-interference performance of equipment.

[0004] This single-function testing equipment not only increases testing costs but also makes the testing process cumbersome. Each test requires equipment replacement and debugging, significantly reducing testing efficiency. Furthermore, the need for multiple different testing devices occupies a large area, placing high demands on testing space and increasing site usage costs. In some space-constrained locations, it can even be difficult to conduct comprehensive anti-interference performance testing.

[0005] In conclusion, there is an urgent need for a testing device that can improve the efficiency of anti-interference performance testing and reduce testing costs. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a device and method for testing the electromagnetic pulse resistance performance of power equipment, in order to solve the problems existing in the prior art.

[0007] According to a first aspect of the present invention, a device for testing the electromagnetic pulse immunity of power equipment is provided, comprising:

[0008] A high-voltage pulse signal generation unit is used to generate high-voltage pulse signals;

[0009] The path switching unit is electrically connected to the high-voltage pulse signal generation unit and is used to switch the transmission path of the high-voltage pulse signal, thereby realizing the switching of the interference mode.

[0010] The cable system conducted interference simulation unit and the device under test radiation simulation unit are selected to be electrically connected to the path switching unit.

[0011] Preferably, the path switching unit includes a switch shield, and a high-voltage probe, a high-voltage switch, and a radio frequency relay disposed therein;

[0012] The high-voltage pulse signal generation unit, the high-voltage switch, and the radio frequency relay are connected in series in sequence, and the high-voltage probe is connected to the output terminal of the high-voltage switch.

[0013] Preferably, the cable system conducted interference simulation unit includes a current injection clamp and a cable of the device under test, wherein the radio frequency relay, the current injection clamp, and the cable of the device under test are connected in series in sequence;

[0014] The current injection clamp is connected to an oscilloscope.

[0015] Preferably, the radiation simulation unit of the device under test includes a detection shield, and a broadband antenna and a field strength probe disposed therein, wherein the detection shield is used to house the device under test;

[0016] The broadband antenna is electrically connected to the radio frequency relay to generate a radiation field within the detection shield, and the field strength probe is used to detect the electromagnetic field strength of the radiation field in which the device under test is located.

[0017] Preferably, the strong field probe is connected in sequence to a signal transmitting unit, an optical fiber receiver, and an oscilloscope;

[0018] The signal transmitting unit includes an attenuator and an optical fiber transmitter connected in series.

[0019] Preferably, the high-voltage pulse signal generation unit includes a capacitor shield, and a Marx generator and an optical fiber splitter disposed therein, wherein the Marx generator and the optical fiber splitter are electrically connected.

[0020] The fiber optic splitter is electrically connected to the path switching unit.

[0021] Preferably, it also includes a high-voltage power supply, which includes a power supply body, a charging resistor, and a high-voltage diode;

[0022] The Marx generator includes a multi-stage capacitor module connected in series. Each stage of the capacitor module is equipped with a charging resistor and a high-voltage diode to form a charging unit. One end of the charging resistor is connected to the positive terminal of the power supply body, and the other end is connected to the anode of the high-voltage diode. The cathode of the high-voltage diode is connected to the positive terminal of the capacitor module, and the negative terminal of the capacitor module is connected to the negative terminal of the power supply body.

[0023] Gas spark gap switches are connected in series between each capacitor module to achieve series discharge during discharge.

[0024] Preferably, it further includes a trigger controller, which is electrically connected to the high-voltage pulse signal generation unit.

[0025] According to a second aspect of the present invention, a method for testing the electromagnetic pulse immunity performance of power equipment is provided, comprising:

[0026] Generate high-voltage pulse signals to simulate a high-power electromagnetic pulse environment;

[0027] The high-voltage pulse signal can be selectively switched and transmitted to the cable system conducted interference simulation unit or the device under test radiation simulation unit, and cable conducted interference is applied in the cable system conducted interference simulation unit, or a radiation field is generated in the device under test radiation simulation unit to apply device radiation interference.

[0028] Collect conducted induced current signals, radiated field strength signals, and the operating status response signals of the device under test;

[0029] The anti-interference performance indicators are calculated based on multiple collected signals, and the calculation results are analyzed.

[0030] Based on the analysis, determine whether the anti-interference performance of the tested equipment is up to standard.

[0031] Preferably, the calculation of anti-interference performance indicators based on multiple collected signals, and the analysis of the calculation results, include:

[0032] The integrated charge of the conducted induced current signal is calculated and compared with a preset charge threshold.

[0033] Extract the peak intensity and duration of the radiation field strength signal, calculate the field strength-time product, and compare it with a preset product threshold.

[0034] Determining whether the anti-interference performance of the tested equipment is qualified based on the analysis includes:

[0035] When the integrated charge does not exceed the charge threshold and the field strength-time product does not exceed the preset product threshold, the anti-interference performance of the tested equipment is deemed qualified.

[0036] The electromagnetic pulse immunity testing equipment and testing method for power equipment in this application have the following advantages compared with the prior art:

[0037] The electromagnetic pulse immunity testing equipment and testing method provided in this application improve the limitations of traditional testing equipment, which can only test one type of interference immunity of power equipment or cable. It enables path selection through radio frequency relays, allowing the signal to be sent to the current injection clamp or broadband antenna respectively, switching the interference mode, and improving the utilization rate of the equipment. Attached Figure Description

[0038] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the invention with reference to the accompanying drawings.

[0039] Figure 1 A schematic diagram of a power equipment electromagnetic pulse resistance testing device according to an embodiment of the present invention is shown.

[0040] Figure 2-3 Schematic diagrams of the structure of the power equipment electromagnetic pulse resistance testing device according to embodiments of the present invention are shown from different perspectives.

[0041] Figure 4 A schematic diagram illustrating the charging and discharging principle of a Marx generator according to an embodiment of the present invention is shown.

[0042] Figure 5 A schematic diagram of the detection shield of a Marx generator according to an embodiment of the present invention is shown.

[0043] Figure 6 A flowchart illustrating a method for testing the electromagnetic pulse immunity of power equipment according to an embodiment of the present invention is shown.

[0044] In the diagram: 1. High-voltage power supply; 11. Power supply body; 12. Charging resistor; 13. High-voltage diode; 14. Power supply shield; 2. High-voltage pulse signal generation unit; 21. Capacitor shield; 22. Marx generator; 221. Capacitor module; 222. Gas spark gap switch; 222. Fiber optic distributor; 23. Path switching unit; 31. Switch shield; 32. High-voltage probe; 33. High-voltage switch; 34. RF relay; 4. Cable system conducted interference simulation unit; 4. Current injection clamp; 41. Cable under test; 42. Radiation simulation unit for the device under test; 5. Detection shield; 51. Lifting rod; 511. Drive motor; 512. Electric telescopic rod; 513. Vertical telescopic rod; 514. Servo guide rail; 515. Moving platform; 516. Broadband antenna; 52. Field strength probe; 53. Device under test; 54. Signal transmission unit; 6. Transmission shield; 61. Fiber optic transmitter; 62. Attenuator; 63. Fiber optic receiver; 7. Oscilloscope; 8. Trigger controller; 9. Detailed Implementation

[0045] Various embodiments of the invention will now be described in more detail with reference to the accompanying drawings. In the various drawings, the same elements are indicated by the same or similar reference numerals. For clarity, the various parts in the drawings are not drawn to scale.

[0046] like Figures 1 to 5 As shown, the present invention provides a power equipment electromagnetic pulse performance testing device, which includes a high voltage pulse signal generation unit 2, a path switching unit 3, a cable system conducted interference simulation unit 4, and a tested equipment radiation simulation unit 5.

[0047] The path switching unit 3 is electrically connected to the high-voltage pulse signal generation unit 2 and is used to switch the conduction path of the pulse signal generated by the high-voltage pulse signal generation unit 2, thereby realizing the switching of the interference mode; the cable system conduction interference simulation unit 4 and the device under test radiation simulation unit 5 are connected to the path switching unit 3.

[0048] The high-voltage pulse signal generation unit 2 includes a capacitor shield 21, a Marx generator 22 and an optical fiber splitter 23 disposed therein, and the Marx generator 22 and the optical fiber splitter 23 are electrically connected; the high-voltage pulse signal generation unit 2 is electrically connected to the path switching unit 3 via the optical fiber splitter 23, and the optical fiber splitter 23 is connected to the oscilloscope 8.

[0049] The electromagnetic pulse immunity testing equipment for power equipment also includes a high-voltage power supply 1 housed within a power supply shield 14. The high-voltage power supply 1 is electrically connected to a high-voltage pulse signal generation unit 2, specifically to a Marx generator 22, to provide power to the Marx generator 22. The high-voltage power supply 1 includes a power supply body 11, a charging resistor 12, and a high-voltage diode 13.

[0050] refer to Figure 4 The Marx generator 22 includes multi-stage capacitor modules 221 connected in series. Each stage of the capacitor module 221 is equipped with a charging resistor 12 and a high-voltage diode 13, forming a charging unit. In each charging unit, one end of the charging resistor 12 is connected to the positive terminal of the power supply body 11, and the other end is connected to the anode of the high-voltage diode. The cathode of the high-voltage diode 13 is connected to the positive terminal of the capacitor module 221, and the negative terminal of the capacitor module 221 is connected to the negative terminal of the power supply body 11. A gas spark gap switch 222 is connected in series between each stage of the capacitor module 221 to achieve series discharge during discharge.

[0051] Adjacent capacitor modules are connected by a gas spark gap switch 222 to form a discharge series circuit path. The positive terminal of the final capacitor module 221 is connected to the high voltage output terminal; the high voltage output terminal is connected to the radio frequency relay 34.

[0052] The Marx generator 22, in conjunction with the high-voltage power supply 1, aims to achieve high-fidelity generation and controllable coupling of high-power electromagnetic pulse analog signals. Specifically, it achieves both conducted and radiated testing through cascaded triggering of the gas spark gap switch 222, charge and discharge isolation of the high-voltage diode 13, and path switching of the radio frequency relay 34.

[0053] The power supply body 11 charges the capacitor modules 221 in parallel to the set voltage through the charging resistor 12 and the high voltage diode 13. At this time, the spark gap switch is in an insulated state. When the trigger signal arrives, the spark gap switch breaks down in sequence, forcing the capacitors to switch from parallel to series discharge. The final stage outputs a high-power electromagnetic pulse with a high amplitude and fast leading edge. This pulse is selectively delivered to the current injection clamp 41 or the broadband antenna 52 through the radio frequency relay 34. At the same time, the charging diode blocks the backflow of energy to ensure the integrity of the pulse waveform.

[0054] The path switching unit 3 includes a switch shield 31, and a high-voltage probe 32, a high-voltage switch 33, and an RF relay 34 housed within it. The high-voltage pulse signal generation unit 2, the high-voltage switch 33, and the RF relay 34 are connected in series. The high-voltage probe 32 is connected to the output terminal of the high-voltage switch 33 and is also connected to an oscilloscope 8. The high-voltage switch 33 is connected to the Marx generator 22 and the fiber optic splitter 23, respectively. The switch shield 31 of the path switching unit 3 is grounded.

[0055] The radiation simulation unit 5 of the device under test includes a detection shield 51, a broadband antenna 52 and a field strength probe 53 disposed therein, and the detection shield 51 is used to house the device under test 54. The broadband antenna 52 is electrically connected to the radio frequency relay 34 and is used to generate a radiation field within the detection shield 51, and the field strength probe 53 is used to detect the electromagnetic field strength of the radiation field in which the device under test 54 is located.

[0056] The strong field probe is connected in sequence to the signal transmitting unit 6, the fiber optic receiver 7, and the oscilloscope 8. The signal transmitting unit includes an attenuator 63 and a fiber optic transmitter 62 connected in series. The attenuator 63 is connected to the field strength probe 53, and the fiber optic transmitter is connected to the fiber optic receiver 7, which is then connected to the oscilloscope 8.

[0057] The cable system conducted interference simulation unit 4 includes a current injection clamp 41 and a device under test (DUT) cable 42. An RF relay 34, the current injection clamp 41, and the DUT cable 42 are connected in series. The current injection clamp 41 is connected to the RF relay 34 and then to an oscilloscope 8. The DUT cable 42 is grounded. The oscilloscope 8 is used to acquire and record the measurement signals from the field strength probe 53 and the current injection clamp 41 in real time.

[0058] In this embodiment, a high-amplitude high-voltage pulse signal is generated by the Marx generator 22 to simulate the detection environment. In specific operation, the high-voltage power supply 1 charges the capacitor modules 2219 of each stage of the Marx generator 221 in parallel to the set voltage value. At this time, each stage of the capacitor is in the energy storage state. When the trigger signal arrives, the spark gap switch in the Marx generator 221 breaks down in sequence, causing each stage of the capacitor to change from the parallel state to the series discharge, thereby generating a transient pulse signal with a high peak voltage.

[0059] The pulse signal is path-selected by the RF relay 34 and can be sent to the current injection clamp 41 or the broadband antenna 52 respectively. When the current injection path is selected, the high voltage pulse is coupled to the cable 42 of the device under test after matching attenuation, simulating the conducted interference effect on the cable system. When the radiation path is selected, the pulse energy is converted into a spatial electromagnetic field by the broadband antenna 52, forming a radiation field environment that meets the standard requirements within the detection shield 51. The field strength probe 53 monitors the electromagnetic field strength at the location of the device under test 54 in real time, while the current injection clamp 41 detects the induced current signal in the cable. The two are transmitted to the oscilloscope 8 through optical fiber isolation for synchronous acquisition and analysis.

[0060] The high-voltage output terminal of the Marx generator 22 is connected to the common terminal of the RF relay 343 via a coaxial feeder; the first and second paths of the RF relay 34 are connected to the current injection clamp 41 and the broadband antenna 52 via coaxial cables, respectively; a high-voltage switch 33 is connected in series between the high-voltage output terminal of the Marx generator 22 and the RF relay 34, and one end of the high-voltage probe 32 is connected to the output terminal of the high-voltage switch 33, while the other end of the high-voltage probe 32 is grounded; the high-voltage probe 32, the high-voltage switch 33, and the RF relay 34 are housed inside the switch shield 31.

[0061] In the above embodiment, the high-voltage pulse generated by the Marx generator 22 is transmitted to the high-voltage switch 33 via a coaxial feeder, and then connected to the common terminal of the radio frequency relay 34. The relay selects to switch the signal to the first path or the second path, and provides high-voltage pulses to the current injection clamp 41 or the broadband antenna 52 through the first path or the second path, respectively. The broadband antenna 52 adopts a biconical antenna, thereby realizing conducted interference coupling or spatial radiated interference transmission to the device under test 54. The high-voltage switch 33 is used to control the on and off of the high-voltage pulse, and the high-voltage probe 32 connected to its output terminal can monitor the pulse voltage waveform in real time to ensure the accuracy of the test parameters.

[0062] The low-voltage signal terminal of the high-voltage probe 32 is connected to the first input channel of the oscilloscope 8; the field strength probe 53 is connected to an attenuator via a coaxial cable; the attenuator is connected to an optical fiber transmitter via a coaxial cable; the optical fiber transmitter is connected to an optical fiber receiver 7 via an optical fiber; the optical fiber receiver 7 is connected to the second input channel of the oscilloscope 8; the attenuator and the optical fiber transmitter are housed inside a transmitting shield.

[0063] In the above embodiments, the connection between the high-voltage pulse and the sensitive measuring device is achieved through layered shielding and optical fiber isolation. When the test system is working, the high-voltage probe 32 directly captures the original high-voltage pulse signal at the output terminal of the high-voltage switch 33, and its low-voltage signal terminal is connected to the first channel of the oscilloscope 8 through a coaxial cable for monitoring the pulse source waveform.

[0064] Meanwhile, the field strength probe 53 transmits the spatial electromagnetic field signal to the attenuator inside the transmitting shield via a double-shielded coaxial cable. After amplitude adjustment, the signal is sent to the fiber optic transmitter for electro-optic conversion.

[0065] The optical signal output by the fiber optic transmitter is transmitted to the fiber optic receiver 7 through a multimode fiber, and is finally acquired by the second channel of the oscilloscope 8, forming a completely electrically isolated measurement link.

[0066] The emission shield suppresses external electromagnetic interference to the internal circuitry, ensuring signal integrity during the photoelectric conversion process. Through multi-channel synchronous acquisition by an oscilloscope, the output waveform of the Marx generator 22 can be directly monitored, and the radiation field strength can also be measured.

[0067] Furthermore, the power equipment electromagnetic pulse resistance testing device also includes a trigger controller 9, which is electrically connected to the high-voltage pulse signal generation unit 2.

[0068] Each gas spark gap switch 222's photoelectric conversion module is also optically connected to the first output end of the fiber optic distributor 23; the second output end of the fiber optic distributor 23 is optically connected to the external trigger input port of the oscilloscope 8; the third output end of the fiber optic distributor 23 is optically connected to the photoelectric trigger interface of the high-voltage switch 33; the fourth output end of the fiber optic distributor 23 is optically connected to the photoelectric conversion module of the radio frequency relay 34; and the input end of the fiber optic distributor 23 is connected to the output end of the trigger controller 9.

[0069] In this embodiment, the initial trigger signal generated by the trigger controller 9 is transmitted to the input end of the fiber optic distributor 23 via optical fiber. The fiber optic distributor 23 distributes the signal synchronously to the gas spark gap switch 222, oscilloscope 8, high voltage switch 33, and RF relay 34 through four output ends to ensure the precise series discharge of the capacitor modules 221 of each stage of the Marx generator 22. When the trigger signal is sent to the external trigger input port of the oscilloscope 87, it provides a synchronization reference for high voltage pulse measurement. At the same time, the trigger controller 9 can also control the on / off action of the high voltage switch 33 through the fiber optic distributor 23 to realize the enable management of the output circuit. The trigger controller 9 sends the trigger signal to the photoelectric conversion module of the RF relay 34 to complete the path switching between the current injection clamp 41 and the broadband antenna 52.

[0070] Please refer to Figure 5. The inner top surface of the detection shield 51 is provided with a hoisting rod 511, which is vertically arranged. A drive motor 512 is installed at the bottom end of the hoisting rod 511, and the output shaft of the drive motor 512 is collinear with the hoisting rod 511. An electric telescopic rod 513 is fixedly installed on the output shaft of the drive motor 512, and its telescopic end extends and retracts in the horizontal plane. A vertical telescopic rod 514 is vertically installed on the telescopic end of the electric telescopic rod 513, and a field strength probe 53 is installed at the bottom end of the vertical telescopic rod 514.

[0071] In this embodiment, the electric telescopic rod 513 is driven by the output shaft of the drive motor 512, causing the output shaft of the electric telescopic rod 513 to rotate along the output shaft of the drive motor 512. The electric telescopic rod 513 continuously extends and retracts during the rotation around the output shaft of the drive motor 512, so that the electric telescopic rod 513 drives the vertical telescopic rod 514 and the field strength probe 53 to move in a rectangular trajectory.

[0072] The bottom surface of the first shielding cover is also provided with a servo guide rail 515, and a moving platform 516 is slidably provided on the servo guide rail 515. The surface of the moving platform 516 is used to place the device under test 54. The electric telescopic rod 513, the vertical telescopic rod 514, and the servo guide rail 515 are all provided with a shielding layer.

[0073] In the above embodiment, the mobile platform 516 is slidably mounted on the servo rail 515. One end of the servo rail 515 is close to the opening of the detection shield 51, so that the device under test 54 can be placed on the mobile platform 516. The servo rail 515 drives the mobile platform 516 to move the device under test 54 downwards on the electric telescopic rod 513 (the power unit part is not shown). This avoids the device under test 54 from entering the shield and causing dust to remain inside the shield when it is manually placed, making it safer. It also prevents dust from adhering to the inner wall of the shield for a long time, forming an electromagnetic wave scattering surface, which would cause the high-frequency cutoff frequency of the shielding room to increase.

[0074] like Figure 6 The present invention also provides a method for testing the electromagnetic pulse immunity performance of power equipment, the method comprising:

[0075] S01) Generates a high-voltage pulse signal to simulate a high-power electromagnetic pulse environment;

[0076] This step includes the following steps:

[0077] S011) Start the drive motor 512 and the electric telescopic rod 51322, and drive the field strength probe 538 to move on the outer wall of the device under test 54. After finding the detection core position of the device under test 54, stop moving.

[0078] During this step, when the probe is scanning, a dynamic compensation mechanism is used to maintain a set safe distance between the probe and the surface of the device under test 54.

[0079] S012) Using Marx generator 22 to generate high-voltage pulse signals to simulate a high-power electromagnetic pulse environment;

[0080] S02) The high-voltage pulse signal can be selectively switched to the cable system conducted interference simulation unit 4 or the device under test radiation simulation unit 5, and cable conducted interference is applied in the cable system conducted interference simulation unit 4, or a radiation field is generated in the device under test radiation simulation unit 5 to apply device radiation interference.

[0081] Specifically, in this step, the high-voltage pulse signal is switched and transmitted to the current injection clamp 41 or the broadband antenna 52 via the radio frequency relay 34, respectively, to couple to the cable 42 of the device under test to apply conducted interference or to generate a radiation field in the shield to apply radiated interference.

[0082] S03) Collect the conducted induced current signal, the radiated field strength signal, and the working status response signal of the device under test 54;

[0083] The following signals are acquired in real time and kept in time synchronization: the radiation field strength signal detected by the field strength probe 53, the conducted induced current signal detected by the current injection clamp 41, and the working status response signal of the device under test 54.

[0084] S04) Calculate the anti-interference performance index based on the collected multiple signals, and analyze the calculation results;

[0085] Specifically, this step includes:

[0086] The integrated charge of the conducted induced current signal is calculated and compared with a preset charge threshold.

[0087] Extract the peak intensity and duration of the radiation field strength signal, calculate the field strength-time product, and compare it with a preset product threshold.

[0088] Calculate the conducted immunity level and the radiated immunity level;

[0089] S05) Based on the analysis, determine whether the anti-interference performance of the tested equipment 54 is qualified.

[0090] When the integrated charge does not exceed the charge threshold and the field strength-time product does not exceed the preset product threshold, the anti-interference performance of the tested device 54 is deemed qualified.

[0091] Specifically, when the conducted immunity level is ≥95% and the radiated immunity level is ≥90%, the interference immunity performance of the tested equipment 54 is deemed qualified.

[0092] The electromagnetic pulse immunity testing equipment and testing method provided in this application improve the limitations of traditional testing equipment, which can only test one type of interference immunity of power equipment or cable. It enables path selection through radio frequency relay 34, which can send the signal to current injection clamp 41 or broadband antenna 52 respectively, switch the interference mode, and improve the utilization rate of the equipment.

[0093] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0094] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A device for testing the electromagnetic pulse immunity of power equipment, characterized in that, include: A high-voltage pulse signal generation unit is used to generate high-voltage pulse signals; The path switching unit is electrically connected to the high-voltage pulse signal generation unit and is used to switch the transmission path of the high-voltage pulse signal, thereby realizing the switching of the interference mode. The cable system conducted interference simulation unit and the device under test radiation simulation unit are selected to be electrically connected to the path switching unit.

2. The electromagnetic pulse immunity testing equipment for power equipment according to claim 1, characterized in that, The path switching unit includes a switch shield, and a high-voltage probe, a high-voltage switch and a radio frequency relay disposed therein; The high-voltage pulse signal generation unit, the high-voltage switch, and the radio frequency relay are connected in series in sequence, and the high-voltage probe is connected to the output terminal of the high-voltage switch.

3. The electromagnetic pulse immunity testing equipment for power equipment according to claim 2, characterized in that, The cable system conducted interference simulation unit includes a current injection clamp and a cable of the device under test, wherein the radio frequency relay, the current injection clamp and the cable of the device under test are connected in series in sequence. The current injection clamp is connected to an oscilloscope.

4. The electromagnetic pulse immunity testing equipment for power equipment according to claim 2, characterized in that, The radiation simulation unit of the device under test includes a detection shield, and a broadband antenna and a field strength probe disposed therein. The detection shield is used to house the device under test. The broadband antenna is electrically connected to the radio frequency relay to generate a radiation field within the detection shield, and the field strength probe is used to detect the electromagnetic field strength of the radiation field in which the device under test is located.

5. The electromagnetic pulse immunity testing equipment for power equipment according to claim 4, characterized in that, The high-field probe is connected in sequence to the signal transmitting unit, the fiber optic receiver, and the oscilloscope. The signal transmitting unit includes an attenuator and an optical fiber transmitter connected in series.

6. The electromagnetic pulse immunity testing equipment for power equipment according to claim 1, characterized in that, The high-voltage pulse signal generation unit includes a capacitor shield, and a Marx generator and an optical fiber splitter disposed therein, wherein the Marx generator and the optical fiber splitter are electrically connected. The fiber optic splitter is electrically connected to the path switching unit.

7. The electromagnetic pulse immunity testing equipment for power equipment according to claim 6, characterized in that, It also includes a high-voltage power supply, which includes a power supply body, a charging resistor, and a high-voltage diode; The Marx generator includes a multi-stage capacitor module connected in series. Each stage of the capacitor module is equipped with a charging resistor and a high-voltage diode to form a charging unit. One end of the charging resistor is connected to the positive terminal of the power supply body, and the other end is connected to the anode of the high-voltage diode. The cathode of the high-voltage diode is connected to the positive terminal of the capacitor module, and the negative terminal of the capacitor module is connected to the negative terminal of the power supply body. Gas spark gap switches are connected in series between each capacitor module to achieve series discharge during discharge.

8. The electromagnetic pulse immunity testing equipment for power equipment according to claim 1, characterized in that, It also includes a trigger controller, which is electrically connected to the high-voltage pulse signal generation unit.

9. A method for testing the electromagnetic pulse immunity of power equipment, characterized in that, include: Generate high-voltage pulse signals to simulate a high-power electromagnetic pulse environment; The high-voltage pulse signal can be selectively switched and transmitted to the cable system conducted interference simulation unit or the device under test radiation simulation unit, and cable conducted interference is applied in the cable system conducted interference simulation unit, or a radiation field is generated in the device under test radiation simulation unit to apply device radiation interference. Collect conducted induced current signals, radiated field strength signals, and the operating status response signals of the device under test; The anti-interference performance indicators are calculated based on multiple collected signals, and the calculation results are analyzed. Based on the analysis, determine whether the anti-interference performance of the tested equipment is up to standard.

10. The method for testing the electromagnetic pulse immunity of power equipment according to claim 9, characterized in that, The anti-interference performance indicators were calculated based on multiple collected signals, and the calculation results were analyzed, including: The integrated charge of the conducted induced current signal is calculated and compared with a preset charge threshold. Extract the peak intensity and duration of the radiation field strength signal, calculate the field strength-time product, and compare it with a preset product threshold. Determining whether the anti-interference performance of the tested equipment is qualified based on the analysis includes: When the integrated charge does not exceed the charge threshold and the field strength-time product does not exceed the preset product threshold, the anti-interference performance of the tested equipment is deemed qualified.

Images