Strong electromagnetic pulse protection device and control method thereof

Abstract

The invention relates to the technical field of electric power protection, and discloses a strong electromagnetic pulse protection device and a control method thereof, and the method comprises the steps: determining the stress probability distribution of a target cable in a plurality of high-power electromagnetic environments according to the stress parameter changes of the target cable in a plurality of different high-power electromagnetic environments, thereby determining the stress protection threshold value of the target cable, and achieving the protection of the target cable. The method comprises the following steps: acquiring a stress protection threshold value of a target cable, monitoring the real-time stress change of the target cable in real time, comparing the real-time stress change with the stress protection threshold value, generating a pulse protection response signal, and when the pulse protection response signal is received, filtering the coupling voltage of the target cable, therefore, the stress protection threshold is optimized by using the stress probability distribution of the target cable in various high-power electromagnetic environments, so that protection response can be performed on the HPEM in time, a power system is prevented from being easily damaged by the HPEM, and the operation reliability of the power system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power protection, and in particular to a strong electromagnetic pulse protection device and a control method thereof. Background Art

[0002] Electromagnetic pulse (EMP) is a general term for a variety of transient electromagnetic phenomena, describing the energy transfer in the form of transient electromagnetic fields that can produce destructive electromagnetic effects on electronic / power systems. At the same time, relevant standards define an electromagnetic radiation environment with an electric field strength greater than 100V / M as a high-power electromagnetic environment (HPEM).

[0003] In traditional power grids, HEMP mainly generates strong pulse disturbances through power line coupling, affecting the transformers, insulators, relays and other line equipment connected to them. The multi-faceted changes in modern power grids make the power system more vulnerable when it is hit by HEMP.

[0004] Although strong electric or magnetic fields can directly cause disturbances to certain devices, the HEMP effect of equipment is more typically the result of stress (voltage and current pulses) generated by the coupling of electromagnetic fields and conductors. The coupling pathways of HEMP and conductors can be divided into two types: direct coupling with external cables connected to the equipment, and coupling with internal circuits after leakage into the equipment. Due to the HEMP spectrum characteristics and the characteristics of power system equipment, for different HEMP types, coupling with external cables connected to the equipment is the main pathway.

[0005] The stress parameters generated by the coupling of HEMP and cable are determined by the HEMP environmental parameters (pulse intensity, waveform, incident direction, polarization direction) on the one hand, and the cable parameters themselves (length, impedance, elevation or burial conditions) on the other hand.

[0006] Therefore, it is necessary to protect HPEM. Due to the uncertainty of stress parameters generated by the coupling of HEMP and cables, the current HPEM protection method is difficult to respond to HPEM in time, which will make the power system vulnerable to HPEM damage and lead to poor operation reliability of the power system. Summary of the invention

[0007] In view of this, the present invention provides a strong electromagnetic pulse protection device and a control method thereof, which solves the technical problem that the current HPEM protection method is difficult to respond to HPEM in time, which will make the power system vulnerable to HPEM damage and lead to poor operation reliability of the power system.

[0008] A first aspect of the present invention provides a strong electromagnetic pulse protection device, comprising: a stress distribution determination module, a stress threshold determination module, a stress monitoring module and a filtering module;

[0009] The stress distribution determination module is used to determine the stress probability distribution of the target cable under multiple high-power electromagnetic environments according to the stress parameter changes of the target cable under multiple different high-power electromagnetic environments;

[0010] The stress threshold determination module is used to determine the stress protection threshold of the target cable according to the stress probability distribution of the target cable under various high-power electromagnetic environments;

[0011] The stress monitoring module is used to monitor the real-time stress change of the target cable in real time, compare the real-time stress change with the stress protection threshold, generate a pulse protection response signal, and send the pulse protection response signal to the filtering module;

[0012] The filtering module is connected to each of the target cables relative to each other, and is used for filtering the coupling voltage of the target cable when receiving the impulse protection response signal.

[0013] Preferably, the device further comprises: a stress acquisition module;

[0014] The stress acquisition module is used to perform coupling simulation calculations on the target cable in a variety of high-power electromagnetic environments, and determine stress parameters of the target cable in the various high-power electromagnetic environments according to the simulation calculation results.

[0015] Preferably, the filtering module includes a rectifier V1, a relay U1, a relay U2, a relay U3, an isolation inductor L1, an isolation inductor L2, an isolation inductor L3, a capacitor C1, a capacitor C2, a resistor R1, a resistor R2 and a resistor R3;

[0016] One end of the rectifier V1 is grounded, and the other end of the rectifier V1 is connected to one end of the relay U2;

[0017] The other end of the relay U2 is respectively connected to one end of the relay U3, one end of the isolation inductor L2 and one end of the relay U1;

[0018] The relay U1 is connected to one end of the isolation inductor L1 and one end of the resistor R3 respectively;

[0019] The other end of the isolation inductor L1 is connected to one end of the capacitor C2;

[0020] The other end of the capacitor C2 is respectively connected to the other end of the resistor R3, one end of the capacitor C1 and one end of the resistor R2;

[0021] The other end of the capacitor C1 is connected to one end of the isolation inductor L3, and the other end of the isolation inductor L3 is connected to the other end of the isolation inductor L2 and the other end of the relay U3 respectively;

[0022] One end of the resistor R2 is grounded, and the other end of the resistor R2 is respectively connected to the other end of the isolation inductor L3, the other end of the isolation inductor L2, and the other end of the relay U3.

[0023] Preferably, the capacitance values ​​of the capacitor C1 and the capacitor C2 are both 2.2 μF.

[0024] Preferably, the inductance of the isolation inductor L2 is less than 16 μH.

[0025] Preferably, the device further comprises a lightning arrester, and the lightning arrester is installed on the target cable at the low-voltage side.

[0026] In a second aspect, the present invention further provides a control method for the strong electromagnetic pulse protection device as described in the first aspect, comprising:

[0027] Determining stress probability distribution of the target cable under a plurality of high-power electromagnetic environments according to stress parameter changes of the target cable under a plurality of different high-power electromagnetic environments;

[0028] Determining a stress protection threshold of the target cable according to a stress probability distribution of the target cable under a plurality of high-power electromagnetic environments;

[0029] Monitor the real-time stress change of the target cable in real time, compare the real-time stress change with the stress protection threshold, and generate a pulse protection response signal;

[0030] When the pulse protection response signal is received, the coupled voltage of the target cable is filtered.

[0031] In a third aspect, the present invention further provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the control method of the strong electromagnetic pulse protection device as described in the second aspect.

[0032] In a fourth aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed, the steps of the control method of the strong electromagnetic pulse protection device as described in the second aspect are implemented.

[0033] In a fifth aspect, the present invention further provides a computer program product, comprising a computer program stored on a non-transitory computer-readable storage medium, wherein the computer program comprises program instructions, wherein when the program instructions are executed by a computer, the computer executes the steps of the control method of the strong electromagnetic pulse protection device as described in the second aspect.

[0034] It can be seen from the above technical solutions that the present invention determines the stress probability distribution of the target cable in a plurality of high-power electromagnetic environments according to the stress parameter changes of the target cable in a plurality of different high-power electromagnetic environments, thereby determining the stress protection threshold of the target cable, and monitoring the real-time stress changes of the target cable in real time, and comparing the real-time stress changes with the stress protection threshold to generate a pulse protection response signal. When the pulse protection response signal is received, the coupling voltage of the target cable is filtered, thereby optimizing the stress protection threshold by utilizing the stress probability distribution of the target cable in a plurality of high-power electromagnetic environments, thereby enabling timely protection response to HPEM, preventing the power system from being easily damaged by HPEM, and improving the operation reliability of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0036] Figure 1 A schematic diagram of the structure of a strong electromagnetic pulse protection device provided by an embodiment of the present invention;

[0037] Figure 2a is the probability distribution of the coupling voltage of E1 on the overhead line;

[0038] Figure 2b is the probability distribution of the coupling voltage of E1 on the ground control line;

[0039] Figure 2c is the probability distribution of the coupling voltage of E1 on the vertical conductor;

[0040] Figure 3 The coupled pulse current characteristic waveform provided by the embodiment of the present invention;

[0041] Figure 4 A circuit diagram of a filter module provided in an embodiment of the present invention;

[0042] Figure 5 The feeding voltage waveform of the target cable when the filtering module is not connected provided by the embodiment of the present invention;

[0043] Figure 6 The feeding voltage waveform of the target cable when the filter module is connected provided by the embodiment of the present invention;

[0044] Figure 7 A residual voltage waveform provided by an embodiment of the present invention;

[0045] Figure 8 A simulation protection result of the comparison between the feed-in voltage and the residual voltage provided by an embodiment of the present invention;

[0046] Fig. 9 A comparison diagram of voltage waveforms before and after the low-pass filter provided by an embodiment of the present invention;

[0047] Fig.10 A flow chart of a control method for a strong electromagnetic pulse protection device provided by an embodiment of the present invention;

[0048] Fig.11 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] like Figure 1 As shown, the embodiment of the present application provides a strong electromagnetic pulse protection device, including: a stress distribution determination module 100, a stress threshold determination module 200, a stress monitoring module 300 and a filtering module 400;

[0051] The stress distribution determination module 100 is used to determine the stress probability distribution of the target cable under multiple high-power electromagnetic environments according to the stress parameter changes of the target cable under multiple different high-power electromagnetic environments.

[0052] Among them, in terms of effects, the objects affected and the modes of effects of different HEMP components have their own characteristics, which means there are different high-power electromagnetic environments, including E1, E2 and E3.

[0053] Among them, the coupling signal on the E1 long line is a high-voltage steep-front short (SFSD) pulse, which has a destructive effect on distribution line equipment and grid control system electronic equipment. The effect of E2 is similar to lightning, and the quasi-DC component of E3 coupling mainly affects equipment connected to particularly long cables.

[0054] The coupled voltage and current generated by HEMP at the cable terminal are affected by many factors, including: the waveform characteristics of the incident HEMP, including amplitude and waveform; the geometric relationship of the cable relative to the propagation direction of the incident HEMP; the geometric relationship of the cable relative to the polarization direction of the incident HEMP; the height of the cable from the ground (or burial depth) and the earth parameters; the cable length; and the cable terminal conditions (circuit and other impedances).

[0055] Due to the many influencing factors and the wide-area distribution characteristics of the power system, it is necessary to give the probability distribution of stress parameters for different HEMP scenarios and cable parameters in the power system assessment.

[0056] Among them, the stress parameter in the embodiment of the present application is the coupling voltage of HEMP on the cable.

[0057] For example, for different types of cables, there are different stress probability distributions of stress parameter changes of the target cables in high-power electromagnetic environments. Figure 2a The probability distribution of the coupling voltage of E1 on the overhead line is shown as Figure 2b The probability distribution of the coupled voltage of E1 on the ground control line is shown as Figure 2c The probability distribution of the coupled voltage of E1 on the vertical wire is shown.

[0058] The stress threshold determination module 200 is used to determine the stress protection threshold of the target cable according to the stress probability distribution of the target cable under various high-power electromagnetic environments.

[0059] Among them, for the stress probability distribution of each target cable in a high-power electromagnetic environment, the average stress of the target cable in the high-power electromagnetic environment can be determined, and the average stress is used as the stress protection threshold of the target cable, so that the strong electromagnetic pulse protection of the target cable in different high-power electromagnetic environments can be flexibly provided.

[0060] The stress monitoring module 300 is used to monitor the real-time stress changes of the target cable in real time, compare the real-time stress changes with the stress protection threshold, generate a pulse protection response signal, and send the pulse protection response signal to the filtering module 400.

[0061] It should be noted that when the real-time stress of the target cable is monitored to be greater than the stress protection threshold, it indicates that a pulse protection demand has been generated, and a pulse protection response signal is generated and sent to the filtering module.

[0062] The filter module is connected to each phase of the target cable, and is used for filtering the coupling voltage of the target cable when receiving the pulse protection response signal.

[0063] It should be noted that antennas and cables in an electromagnetic pulse environment can induce large currents and high voltages. This electrical stress can cause temporary disturbances or permanent physical damage to the electronic equipment connected to them. According to the standard, the main characteristics of the coupling current can be described by a double exponential pulse current, which can also be used to verify the HEMP reinforcement performance provided by various cable POE protection devices. The main technical indicators of the pulse current injection waveform are the amplitude, leading edge and half-height width of the waveform. The characteristic waveform of the coupling pulse current is as follows: Figure 3 As shown, the lower limit of its bandwidth can be approximately expressed by the inverse of the fall time. The fall time of this waveform is about 0.3μs, so the lower limit of the bandwidth is about 3.3MHz.

[0064] The operating frequency of the protection line is 50Hz, which is 66k times different. Therefore, the interference belongs to out-of-band interference. The embodiment of the present application designs the filter module as a low-pass filter, and because the HEMP current surge induced by the line is a common-mode signal, it is intended to connect the filter module to each relative ground.

[0065] Among them, Figure 4 As shown, the filtering module includes a rectifier V1, a relay U1, a relay U2, a relay U3, an isolation inductor L1, an isolation inductor L2, an isolation inductor L3, a capacitor C1, a capacitor C2, a resistor R1, a resistor R2 and a resistor R3;

[0066] One end of the rectifier V1 is grounded, and the other end of the rectifier V1 is connected to one end of the relay U2;

[0067] The other end of the relay U2 is respectively connected to one end of the relay U3, one end of the isolation inductor L2 and one end of the relay U1;

[0068] The relay U1 is connected to one end of the isolation inductor L1 and one end of the resistor R3 respectively;

[0069] The other end of the isolation inductor L1 is connected to one end of the capacitor C2;

[0070] The other end of the capacitor C2 is respectively connected to the other end of the resistor R3, one end of the capacitor C1 and one end of the resistor R2;

[0071] The other end of the capacitor C1 is connected to one end of the isolation inductor L3, and the other end of the isolation inductor L3 is connected to the other end of the isolation inductor L2 and the other end of the relay U3 respectively;

[0072] One end of the resistor R2 is grounded, and the other end of the resistor R2 is respectively connected to the other end of the isolation inductor L3, the other end of the isolation inductor L2, and the other end of the relay U3.

[0073] It should be noted that the filter module is affected by the isolation inductor L2, the capacitor capacitance and the capacitor grounding inductance. The influence of the above factors is analyzed by using analog circuits. Since the inductor needs to pass the large current in daily work normally, the rated current reaches 1600A. There is a problem of core saturation when using a magnetic core to prepare the inductor. After the core is saturated, the filter will lose its protection ability. Therefore, it is planned to use an air-core inductor. According to the size and weight requirements of the installation, the inductance value is initially selected at 16μH. Therefore, only the influence of the capacitance value and the capacitor grounding inductance is analyzed later.

[0074] The voltage waveform of the target cable when the filter module is not connected is as follows: Figure 5 As shown in the figure, the voltage peak is 200kV, the leading edge is less than 10ns, and the half width is about 100ns. After the filter module is connected, due to the influence of the filter module on the load, the waveform will change and the amplitude will be slightly reduced, such as Figure 6 shown.

[0075] The capacitance of the filter capacitor is changed from 100nF to 10μF. Assuming that the load is open circuit, the residual voltage waveform is basically similar, and the peak value is basically the same. Therefore, the capacitance of the filter capacitor has little effect. According to the research on existing products in the market, a 2.2μF AC capacitor is selected as the capacitance value of the filter capacitor. Therefore, the capacitance values ​​of the capacitor C1 and the capacitor C2 of the filter module in the embodiment of the present application are both 2.2μF.

[0076] At the same time, the capacitor grounding inductance is changed from 0 to 1μH. Assuming the load is open circuit, the residual voltage waveform is as follows: Figure 7 As shown, it can be seen from the simulation results that the smaller the grounding inductance, the smaller the residual voltage. Therefore, the influence of the grounding inductance is very large. The grounding inductance should be reduced as much as possible in the application. Due to the limitation of the insulation size, the inductance is difficult to be too small, and it is estimated as 1μH. Therefore, the inductance value of the isolation inductor L2 of the filter module in the embodiment of the present application is less than 16μH, and the preferred inductance value of the isolation inductor L2 is 16μH. When the inductance value of the isolation inductor L2 is 16μH, the simulation protection result of the comparison between the feed voltage and the residual voltage is as follows Figure 8 As shown in the figure, the peak value of the feed voltage surge is 190kV, the residual voltage on the open-circuit load is 9kV, and the attenuation factor is about 21 times. When the line is working normally, the low-pass filter will not generate any interfering harmonics on the line. The AC waveforms before and after the filter overlap, as shown in the figure below. Fig. 9 shown.

[0077] Among them, the filtering module of the embodiment of the present application is different from the traditional surge protector. The filtering module of the embodiment of the present application utilizes the characteristic that the surge frequency is much higher than the common power supply system 50 / 60HZ, and is designed to reduce the energy of the surge by filtering.

[0078] At the same time, the filtering module of the embodiment of the present application uses a passive filter, which is a filtering circuit composed of a combination of inductors, capacitors and resistors, which can filter out one or more harmonics. The passive filter is composed of passive components such as LC, which is designed to have extremely low impedance at a certain frequency to shunt the harmonic current of the corresponding frequency. Its behavior mode is to provide a passive harmonic current bypass channel.

[0079] Among them, passive filters have the advantages of simple structure, low cost, high operating reliability and low operating cost.

[0080] It should be noted that the embodiment of the present application determines the stress probability distribution of the target cable in a plurality of high-power electromagnetic environments according to the stress parameter changes of the target cable in a plurality of different high-power electromagnetic environments, thereby determining the stress protection threshold of the target cable, and monitors the real-time stress changes of the target cable in real time, and compares the real-time stress changes with the stress protection threshold to generate a pulse protection response signal. When the pulse protection response signal is received, the coupling voltage of the target cable is filtered, thereby optimizing the stress protection threshold by utilizing the stress probability distribution of the target cable in a plurality of high-power electromagnetic environments, thereby enabling timely protection response to HPEM, preventing the power system from being easily damaged by HPEM, and improving the operational reliability of the power system.

[0081] It is understandable that the stress parameters generated by the coupling of HEMP and cable are determined by the HEMP environmental parameters (pulse intensity, waveform, incident direction, polarization direction) on the one hand, and the cable parameters (length, impedance, elevated or buried conditions) on the other hand. Therefore, in the evaluation and analysis of the effect of HEMP on the power system, it is particularly important to obtain the stress parameters of HEMP acting on different system equipment through theoretical analysis, simulation calculation and experiment.

[0082] To this end, the device further comprises: a stress acquisition module;

[0083] The stress acquisition module is used to perform coupled simulation calculations on the target cable in a variety of high-power electromagnetic environments, and determine the stress parameters of the target cable in a variety of high-power electromagnetic environments based on the simulation calculation results.

[0084] Among them, simulation software can be used to perform coupling simulation calculations on the target cable in a variety of high-power electromagnetic environments.

[0085] In actual installation and operation, the strong electromagnetic pulse protection device can be installed on the low-voltage side of the transformer. The 35kV four-row station #1 main transformer is 3150kVA, the rated current on the 10kV side is 182A, the rated current of the protector is not less than 500A, and the main line section is not less than 250mm 2 Consider. The 110kV Tunqiu station main transformer is 16000kVA, the 6kV side rated current is 1539A, and the main line section is not less than 600mm 2 consider.

[0086] The low-voltage side line of the transformer is an overhead line of the distribution network. Therefore, the embodiment of the present application also includes a lightning arrester, which is installed on the target cable at the low-voltage side.

[0087] Among them, since the electromagnetic pulse is coupled to the overhead line to generate a high-voltage surge, the surge voltage is very high, which can reach hundreds of kilovolts. Therefore, the lightning arrester will generally operate, but the response speed of the lightning arrester is limited, so there will be a spike surge that is missed. Studies have shown that the peak value of the spike surge is still in the order of hundreds of kilovolts, but the pulse width is relatively narrow, generally less than 20ns.

[0088] Based on the same inventive concept, an embodiment of the present application also provides a control method for implementing the strong electromagnetic pulse protection device involved above.

[0089] The implementation solution to the problem provided by the control method is similar to the implementation solution recorded in the above-mentioned device. Therefore, the specific limitations in the control method embodiments of one or more strong electromagnetic pulse protection devices provided below can be found in the above limitations on strong electromagnetic pulse protection devices and will not be repeated here.

[0090] like Fig.10 As shown, the embodiment of the present application also provides a control method of a strong electromagnetic pulse protection device as in any of the above embodiments, including:

[0091] Step S1, determining the stress probability distribution of the target cable under a plurality of high-power electromagnetic environments according to the stress parameter changes of the target cable under a plurality of different high-power electromagnetic environments.

[0092] Step S2: determining a stress protection threshold of the target cable according to the stress probability distribution of the target cable under a variety of high-power electromagnetic environments.

[0093] Step S3: monitor the real-time stress change of the target cable in real time, compare the real-time stress change with the stress protection threshold, and generate a pulse protection response signal.

[0094] Step S4: When the pulse protection response signal is received, the coupling voltage of the target cable is filtered.

[0095] In some embodiments, the method further includes: performing coupling simulation calculations on the target cable in a variety of high-power electromagnetic environments, and determining stress parameters of the target cable in the variety of high-power electromagnetic environments according to the simulation calculation results.

[0096] In some embodiments, the filtering module includes a rectifier V1, a relay U1, a relay U2, a relay U3, an isolation inductor L1, an isolation inductor L2, an isolation inductor L3, a capacitor C1, a capacitor C2, a resistor R1, a resistor R2, and a resistor R3;

[0097] One end of the rectifier V1 is grounded, and the other end of the rectifier V1 is connected to one end of the relay U2;

[0098] The other end of the relay U2 is respectively connected to one end of the relay U3, one end of the isolation inductor L2 and one end of the relay U1;

[0099] The relay U1 is connected to one end of the isolation inductor L1 and one end of the resistor R3 respectively;

[0100] The other end of the isolation inductor L1 is connected to one end of the capacitor C2;

[0101] The other end of the capacitor C2 is respectively connected to the other end of the resistor R3, one end of the capacitor C1 and one end of the resistor R2;

[0102] The other end of the capacitor C1 is connected to one end of the isolation inductor L3, and the other end of the isolation inductor L3 is connected to the other end of the isolation inductor L2 and the other end of the relay U3 respectively;

[0103] One end of the resistor R2 is grounded, and the other end of the resistor R2 is respectively connected to the other end of the isolation inductor L3, the other end of the isolation inductor L2, and the other end of the relay U3.

[0104] In some embodiments, the capacitance values ​​of the capacitor C1 and the capacitor C2 are both 2.2 μF.

[0105] In some embodiments, the inductance of the isolation inductor L2 is less than 16 μH.

[0106] In some embodiments, the strong electromagnetic pulse protection device further includes a lightning arrester, which is installed on the target cable at the low-voltage side.

[0107] like Fig.11 As shown, an embodiment of the present application also provides an electronic device, the electronic device 10 includes a memory 20 and a processor 30, the memory 20 stores a computer program, and when the computer program is executed by the processor 30, the processor 30 executes the steps of the control method of the strong electromagnetic pulse protection device as in the above embodiment.

[0108] The embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed, the steps of the control method of the strong electromagnetic pulse protection device in the above embodiment are implemented.

[0109] An embodiment of the present application also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the steps of the control method of the strong electromagnetic pulse protection device in the above-mentioned embodiment.

[0110] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices, electronic devices, computer storage media and computer program products can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0111] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or apparatus.

[0112] In several embodiments provided by the present invention, it is understood that each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and a part of a module, a program segment or a code includes one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved.

[0113] In the several embodiments provided by the present invention, it should be understood that the disclosed devices, electronic devices, computer storage media, computer program products and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0114] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0115] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0116] If the integrated unit is implemented in the form of 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 the present invention is essentially 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. The computer software product is stored in a storage medium, including several instructions for executing all or part of the steps of the method described in each embodiment of the present invention through a computer device (which can be a personal computer, server, or network device, etc.). The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (full name in English: Read-Only Memory, English abbreviation: ROM), random access memory (full name in English: Random Access Memory, English abbreviation: RAM), disk or optical disk and other media that can store program codes.

[0117] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A strong electromagnetic pulse protection device, characterized in that: include: A stress distribution determination module, a stress threshold determination module, a stress monitoring module and a filtering module; The stress distribution determination module is used to determine the stress probability distribution of the target cable under multiple high-power electromagnetic environments according to the stress parameter changes of the target cable under multiple different high-power electromagnetic environments; The stress threshold determination module is used to determine the stress protection threshold of the target cable according to the stress probability distribution of the target cable under various high-power electromagnetic environments; The stress monitoring module is used to monitor the real-time stress change of the target cable in real time, compare the real-time stress change with the stress protection threshold, generate a pulse protection response signal, and send the pulse protection response signal to the filtering module; The filtering module is connected to each of the target cables relative to each other, and is used for filtering the coupling voltage of the target cable when receiving the impulse protection response signal.

2. The strong electromagnetic pulse protection device according to claim 1 is characterized in that: Also includes: Stress acquisition module; The stress acquisition module is used to perform coupling simulation calculations on the target cable in a variety of high-power electromagnetic environments, and determine stress parameters of the target cable in the various high-power electromagnetic environments according to the simulation calculation results.

3. The strong electromagnetic pulse protection device according to claim 1 is characterized in that: The filtering module includes a rectifier V1, a relay U1, a relay U2, a relay U3, an isolation inductor L1, an isolation inductor L2, an isolation inductor L3, a capacitor C1, a capacitor C2, a resistor R1, a resistor R2 and a resistor R3; One end of the rectifier V1 is grounded, and the other end of the rectifier V1 is connected to one end of the relay U2; The other end of the relay U2 is respectively connected to one end of the relay U3, one end of the isolation inductor L2 and one end of the relay U1; The relay U1 is connected to one end of the isolation inductor L1 and one end of the resistor R3 respectively; The other end of the isolation inductor L1 is connected to one end of the capacitor C2; The other end of the capacitor C2 is respectively connected to the other end of the resistor R3, one end of the capacitor C1 and one end of the resistor R2; The other end of the capacitor C1 is connected to one end of the isolation inductor L3, and the other end of the isolation inductor L3 is connected to the other end of the isolation inductor L2 and the other end of the relay U3 respectively; One end of the resistor R2 is grounded, and the other end of the resistor R2 is respectively connected to the other end of the isolation inductor L3, the other end of the isolation inductor L2, and the other end of the relay U3.

4. The strong electromagnetic pulse protection device according to claim 3 is characterized in that: The capacitance values ​​of the capacitor C1 and the capacitor C2 are both 2.2 μF.

5. The strong electromagnetic pulse protection device according to claim 3 is characterized in that: The inductance value of the isolation inductor L2 is less than 16 μH.

6. The strong electromagnetic pulse protection device according to claim 1 is characterized in that: It also includes a lightning arrester, which is installed on the target cable at the low-voltage side.

7. A control method for a strong electromagnetic pulse protection device according to any one of claims 1 to 6, characterized in that: include: Determining stress probability distribution of the target cable under a plurality of high-power electromagnetic environments according to stress parameter changes of the target cable under a plurality of different high-power electromagnetic environments; Determining a stress protection threshold of the target cable according to a stress probability distribution of the target cable under a plurality of high-power electromagnetic environments; Monitor the real-time stress change of the target cable in real time, compare the real-time stress change with the stress protection threshold, and generate a pulse protection response signal; When the pulse protection response signal is received, the coupled voltage of the target cable is filtered.

8. An electronic device, characterized in that: The electronic device includes a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of the control method of the strong electromagnetic pulse protection device as described in claim 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed, the steps of the control method of the strong electromagnetic pulse protection device as claimed in claim 7 are implemented.

10. A computer program product, characterized in that The computer program product includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer is caused to perform the steps of the control method of the strong electromagnetic pulse protection device as described in claim 7.

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