Method for forsmark effect monitoring of nuclear class electrical equipment

Abstract

The application provides a Forsmark effect monitoring method of a nuclear-grade electrical device, which comprises the following steps: obtaining a modulus value of a power grid voltage input into the nuclear-grade electrical device according to a preset monitoring period; matching a current monitoring period with a Yth monitoring period before the current monitoring period, and calculating a mutation ratio of the modulus value of the current monitoring period relative to the modulus value of the matched monitoring period; and if the mutation ratios corresponding to the current monitoring period and the previous Y-1 monitoring periods are all greater than a mutation protection value, it is determined that the nuclear-grade electrical device will have a Forsmark effect. The application can realize timely detection of a power grid voltage mutation, thereby avoiding the generation of a Forsmark effect in a circuit of the nuclear-grade electrical device and causing damage to devices, and ensuring the normal work of the nuclear-grade electrical device.

Description

Technical Field

[0001] This invention relates to the field of power technology, and in particular to a method for monitoring the Forsmark effect in nuclear-grade electrical equipment. Background Technology

[0002] The Forsmark effect refers to the phenomenon where a sudden surge in AC input grid voltage causes fluctuations in DC bus voltage that exceed the inverter's device performance tolerance, resulting in an interruption or sudden change in output AC voltage. The Forsmark effect is prevalent in nuclear-grade electrical equipment circuits. Due to sudden changes in the AC input grid (grid connection), the voltage is transmitted to the DC bus through the rectifier circuit, causing a sudden increase in DC bus voltage that exceeds the inverter's DC input overvoltage point, leading to output power loss. When the DC bus voltage surge is excessively high, it may even damage the inverter's IGBT transistors, affecting the normal operation of the system.

[0003] In existing technologies, the bus voltage of the DC bus of nuclear-grade electrical equipment is usually monitored to determine whether the Forsmark effect has occurred. However, this method has the problem of untimely monitoring. Summary of the Invention

[0004] In view of this, the present invention provides a method for monitoring the Forsmark effect in nuclear-grade electrical equipment, which can solve the problem of Forsmark effect generation in the circuit of nuclear-grade electrical equipment caused by untimely monitoring of the Forsmark effect.

[0005] In a first aspect, embodiments of the present invention provide a method for monitoring the Forsmark effect in nuclear-grade electrical equipment, comprising:

[0006] The modulus of the grid voltage input to nuclear-grade electrical equipment is obtained according to a preset monitoring cycle;

[0007] The current monitoring period is matched with the Yth monitoring period preceding the current monitoring period, and the abrupt change ratio of the modulus value of the current monitoring period relative to the modulus value of the matched monitoring period is calculated.

[0008] If the mutation ratios for the current monitoring period and the previous Y-1 monitoring periods are both greater than the mutation protection value, then it is determined that the nuclear-grade electrical equipment will experience the Forsmark effect.

[0009] In a second aspect, embodiments of the present invention provide a Forsmark effect monitoring device for nuclear-grade electrical equipment, comprising:

[0010] The modulus calculation module is used to obtain the modulus of the grid voltage input to nuclear-grade electrical equipment according to a preset monitoring cycle;

[0011] The mutation ratio calculation module is used to match the current monitoring period with the Yth monitoring period before the current monitoring period, and calculate the mutation ratio of the modulus value of the current monitoring period relative to the modulus value of the matched monitoring period.

[0012] The mutation monitoring module is used to determine that the nuclear-grade electrical equipment will experience the Forsmark effect if the mutation ratio corresponding to the current monitoring period and the previous Y-1 monitoring periods is greater than the mutation protection value.

[0013] Thirdly, embodiments of the present invention provide a terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method as described in any possible implementation of the first aspect above.

[0014] Fourthly, embodiments of the present invention provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the method as described in any possible implementation of the first aspect above.

[0015] Fifthly, embodiments of the present invention provide a nuclear-grade electrical device, which includes the terminal described in the third aspect above.

[0016] The beneficial effects of the embodiments of the present invention compared with the prior art are as follows:

[0017] This embodiment of the invention matches the current monitoring cycle with the Y-th monitoring cycle preceding the current monitoring cycle and calculates the mutation ratio of the modulus value of the current monitoring cycle relative to the modulus value of the matched monitoring cycle. If the mutation ratios corresponding to the current monitoring cycle and the preceding Y-1 monitoring cycles are both greater than the mutation protection value, it is determined that the nuclear-grade electrical equipment is about to experience a Forsmark effect. This enables timely detection of grid voltage mutations, thereby preventing Forsmark effects from occurring in the circuits of nuclear-grade electrical equipment and causing device damage. At the same time, this embodiment improves the accuracy of Forsmark effect monitoring by detecting multiple monitoring cycles, ensuring the normal operation of nuclear-grade electrical equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1This is an application scenario diagram of the Forsmark effect monitoring method for nuclear-grade electrical equipment provided in this embodiment of the invention;

[0020] Figure 2 This is a flowchart illustrating the implementation of the Forsmark effect monitoring method for nuclear-grade electrical equipment provided in this embodiment of the invention.

[0021] Figure 3 This is a schematic diagram illustrating the mutation ratio calculation of the Forsmark effect monitoring method for nuclear-grade electrical equipment provided in this embodiment of the invention;

[0022] Figure 4 This is a schematic diagram of the Forsmark effect monitoring device for nuclear-grade electrical equipment provided in an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the terminal provided in an embodiment of the present invention. Detailed Implementation

[0024] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0025] To make the objectives, technical solutions, and advantages of the present invention clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0026] Figure 1 This diagram illustrates an application scenario of the Forsmark effect monitoring method for nuclear-grade electrical equipment provided in this invention. Figure 1 As shown, the nuclear-grade electrical equipment includes a rectifier module 10; the rectifier module 10 is used to convert the grid voltage input to the rectifier module from AC to DC and output it to the DC bus of the nuclear-grade electrical equipment.

[0027] In this embodiment of the application, the nuclear-grade electrical equipment can be a device equipped with a DC bus and a rectifier module 10. The rectifier module 10 is used to convert the AC power (which can be input from the grid) input to the nuclear-grade electrical equipment into DC power and output it to the DC bus of the nuclear-grade electrical equipment.

[0028] In other applications, such as nuclear power plants, nuclear-grade electrical equipment is typically equipped with energy storage units (such as battery packs), and its rectifier modules are usually chargers with rectification and charging functions.

[0029] It should be noted that the specific structure of the nuclear-grade electrical equipment provided in this embodiment is only an example and is not intended to limit the structure of electrical equipment. In actual application scenarios, other nuclear-grade electrical equipment that can be connected to mains power are also applicable to this method.

[0030] Specifically, sudden changes in AC input grid voltage surges can cause fluctuations in the DC bus voltage of the rectifier module. When the fluctuation range exceeds the DC overvoltage protection point of the downstream inverter, it can lead to inverter damage or power outage. Therefore, it is necessary to identify sudden changes in AC grid voltage in a timely and effective manner to protect nuclear-grade electrical equipment in the event of sudden grid voltage changes.

[0031] like Figure 2 As shown, Figure 2 A flowchart illustrating the implementation of the Forsmark effect monitoring method for nuclear-grade electrical equipment provided in this application is shown, and detailed below:

[0032] S101: Obtain the modulus of the grid voltage input to nuclear-grade electrical equipment according to the preset monitoring cycle.

[0033] In one possible implementation, the specific implementation process of S101 includes:

[0034] The modulus of the grid voltage input to nuclear-grade electrical equipment is calculated based on the modulus calculation formula;

[0035] The formula for calculating the modulus is:

[0036] ;

[0037] in, Indicates three-phase voltage. This represents the magnitude of the grid voltage.

[0038] In this embodiment, when the grid voltage is stable, the magnitude is a constant value. When the grid voltage changes abruptly, the magnitude will also change abruptly. Based on this principle, this embodiment calculates the magnitude of the grid voltage in real time for each monitoring period, and can easily and accurately determine whether the grid voltage has changed abruptly based on the change in the magnitude.

[0039] Specifically, define a first array Each time the modulus value is calculated, the modulus value is stored in the first array. middle.

[0040] S102: Match the current monitoring period with the Yth monitoring period preceding the current monitoring period, and calculate the abrupt change ratio of the modulus value of the current monitoring period relative to the modulus value of the matched monitoring period.

[0041] S103: If the mutation ratios corresponding to the current monitoring cycle and the previous Y-1 monitoring cycles are both greater than the mutation protection value, then it is determined that the nuclear-grade electrical equipment will experience the Forsmark effect.

[0042] In this embodiment, if only the change in the magnitude of the grid voltage during the current monitoring period is used to determine whether a sudden change has occurred in the grid voltage, there may be errors in individual grid voltage data collection, leading to misjudgments. Therefore, this embodiment continuously calculates the change ratio of the magnitude over multiple monitoring periods to improve the accuracy of Forsmark effect monitoring of nuclear-grade electrical equipment.

[0043] Specifically, this embodiment can monitor the mutation ratio of the modulus value across multiple monitoring periods by setting monitoring period groups. Specifically, for the current monitoring period, a sliding window method is used to determine the monitoring period group to which the current monitoring period belongs. When monitoring the mutation ratio of the modulus value corresponding to the current monitoring period, the current monitoring period and the previous Y-1 monitoring periods are first selected to form the current monitoring period group. The previous monitoring period group is then the monitoring period group consisting of the previous Y+1 monitoring periods to the previous 2Y monitoring periods. Then, the monitoring periods of the two monitoring period groups are matched one-to-one; specifically, the matching relationship between the two monitoring period groups is as follows: and match, and match,..... and match.

[0044] In this embodiment, a sliding window is used in the first array to match a monitoring cycle group for each monitoring cycle, thereby calculating a set of mutation ratios corresponding to each monitoring cycle, so as to improve the accuracy and timeliness of mains power mutation detection.

[0045] In one possible implementation, after S101, the method provided in this embodiment further includes:

[0046] Determine if there are any remaining storage locations in the first array. If there are, store the modulus value of the current monitoring period in an empty location in the first array according to its storage order. If there are no remaining storage locations in the first array, delete the modulus value of the monitoring period that was stored first in the first array, shift all remaining modulus values ​​in the first array one position forward, and then store the modulus value of the current monitoring period in an empty location, thus updating the first array.

[0047] In one possible implementation, after S101, the method provided in this embodiment further includes:

[0048] Determine if there are any remaining storage locations in the first array; if there are no remaining storage locations in the first array, delete the modulus value of the monitoring period that was first stored in the first array, and store the modulus value of the current monitoring period in the location of the latest deleted modulus value. The first array includes at least 2Y storage locations.

[0049] Specifically, the first array can be an array containing 2Y storage locations. After calculating the modulus value for the current monitoring period, it is determined whether there are any remaining storage locations in the first array. If there are remaining storage locations, the modulus value for the current monitoring period is stored in the remaining storage locations according to the storage order of the first array. If the first array is full and there are no remaining storage locations, the modulus value of the monitoring period that was stored in the first array first is deleted, and the modulus value of the current monitoring period is stored in the newly vacated storage location. This achieves the storage of the modulus value and the updating of the first array.

[0050] By employing the above method, this embodiment not only maximizes storage space savings but also eliminates the need to move the position of each modulus value every time it is stored, thereby improving the storage efficiency of modulus values. Furthermore, when calculating the mutation ratio, it is only necessary to determine the position of the modulus value in the array during modulus value updates, thus ensuring the efficiency of mutation ratio calculation.

[0051] In one possible implementation, the specific implementation process of S102 includes:

[0052] The mutation ratio is calculated based on the mutation ratio calculation formula, which calculates the mutation ratio of the modulus value of the current monitoring period relative to the modulus value of the matching monitoring period.

[0053] The formula for calculating the mutation ratio is:

[0054]

[0055] in, This represents the mutation ratio of the modulus value in the Zth monitoring period. This represents the modulus value for the Zth monitoring period. This represents the modulus value of the Yth monitoring period preceding the Zth monitoring period.

[0056] For example, the Y value can be 3 or 4, and the mutation protection value can be 50% or 60%.

[0057] For example, such as Figure 3 As shown, with a mutation protection value of 0.5 and Y = 3, the latest modulus value is in the array. Taking the position Z=10 as an example, the following conditions must be met simultaneously to trigger protection:

[0058] fabs((MagBuf

[10] - MagBuf[7]) / MagBuf[7])>0.5

[0059] fabs((MagBuf[9] - MagBuf[6]) / MagBuf[6])>0.5

[0060] fabs((MagBuf[8] - MagBuf[5]) / MagBuf[5])>0.5

[0061] In one possible implementation, after S103, the method provided in this embodiment further includes:

[0062] Power-off protection is provided for the nuclear-grade electrical equipment.

[0063] In one possible implementation, the method provided in this embodiment further includes:

[0064] Get the mains power protection time set by the user;

[0065] The corresponding Y value is determined based on the mains power protection time.

[0066] Specifically, users can customize the duration of the mains power protection time. After obtaining the mains power protection time, the terminal converts the mains power protection time into a Y value based on the monitoring cycle duration, thereby improving the adaptability of this method.

[0067] This invention matches the current monitoring cycle with the Y-th monitoring cycle preceding the current monitoring cycle and calculates the mutation ratio of the modulus value of the current monitoring cycle relative to the modulus value of the matched monitoring cycle. If the mutation ratios corresponding to the current monitoring cycle and the preceding Y-1 monitoring cycles are both greater than the mutation protection value, it is determined that the nuclear-grade electrical equipment is about to experience the Forsmark effect. This enables timely detection of grid voltage mutations, thereby preventing the Forsmark effect from occurring in the circuit of the nuclear-grade electrical equipment and causing device damage, thus ensuring the normal operation of the nuclear-grade electrical equipment.

[0068] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0069] The following are device embodiments of the present invention. For details not described in detail, please refer to the corresponding method embodiments described above.

[0070] Figure 4 A schematic diagram of the Forsmark effect monitoring device for nuclear-grade electrical equipment provided in an embodiment of the present invention is shown. For ease of explanation, only the parts relevant to the embodiment of the present invention are shown, and are described in detail below:

[0071] like Figure 4As shown, the Forsmark effect monitoring device 100 for nuclear-grade electrical equipment includes:

[0072] Modulus calculation module 110 is used to obtain the modulus of the grid voltage input to nuclear-grade electrical equipment according to a preset monitoring cycle;

[0073] The mutation ratio calculation module 120 is used to match the current monitoring period with the Yth monitoring period before the current monitoring period, and calculate the mutation ratio of the modulus value of the current monitoring period relative to the modulus value of the matched monitoring period.

[0074] The mutation monitoring module 130 is used to determine that the nuclear-grade electrical equipment will experience the Forsmark effect if the mutation ratio corresponding to the current monitoring period and the previous Y-1 monitoring periods is greater than the mutation protection value.

[0075] In one possible implementation, the mutation ratio calculation module 120 is specifically used for:

[0076] The mutation ratio is calculated based on the mutation ratio calculation formula, which calculates the mutation ratio of the modulus value of the current monitoring period relative to the modulus value of the matching monitoring period.

[0077] The formula for calculating the mutation ratio is:

[0078]

[0079] in, This represents the mutation ratio of the modulus value in the Zth monitoring period. This represents the modulus value for the Zth monitoring period. This represents the modulus value of the Yth monitoring period preceding the Zth monitoring period.

[0080] In one possible implementation, the modulus calculation module 110 is used for:

[0081] The modulus of the grid voltage input to nuclear-grade electrical equipment is calculated based on the modulus calculation formula;

[0082] The formula for calculating the modulus is:

[0083] ;

[0084] in, Indicates three-phase voltage. This represents the magnitude of the grid voltage.

[0085] In one possible implementation, the Forsmark effect monitoring device 100 for nuclear-grade electrical equipment further includes:

[0086] A power failure protection module is used to provide power failure protection for the nuclear-grade electrical equipment.

[0087] In one possible implementation, the Forsmark effect monitoring device for nuclear-grade electrical equipment further includes a modulus storage module for:

[0088] Determine if there are any remaining storage locations in the first array; if there are no remaining storage locations in the first array, delete the modulus value of the monitoring period that was first stored in the first array, and store the modulus value of the current monitoring period in the location of the latest deleted modulus value. The first array includes at least 2Y storage locations.

[0089] In one possible implementation, the Forsmark effect monitoring device for nuclear-grade electrical equipment further includes a Y-value setting module for:

[0090] Get the mains power protection time set by the user;

[0091] The corresponding Y value is determined based on the mains power protection time.

[0092] This invention matches the current monitoring cycle with the Y-th monitoring cycle preceding the current monitoring cycle and calculates the mutation ratio of the modulus value of the current monitoring cycle relative to the modulus value of the matched monitoring cycle. If the mutation ratios corresponding to the current monitoring cycle and the preceding Y-1 monitoring cycles are both greater than the mutation protection value, it is determined that the nuclear-grade electrical equipment is about to experience the Forsmark effect. This enables timely detection of grid voltage mutations, thereby preventing the Forsmark effect from occurring in the circuit of the nuclear-grade electrical equipment and causing device damage, thus ensuring the normal operation of the nuclear-grade electrical equipment.

[0093] The Forsmark effect monitoring device for nuclear-grade electrical equipment provided in this embodiment can be used to execute the Forsmark effect monitoring method embodiment for nuclear-grade electrical equipment described above. Its implementation principle and technical effect are similar, and will not be described again here.

[0094] Figure 5 This is a schematic diagram of a terminal provided in an embodiment of the present invention. For example... Figure 5 As shown, the terminal 5 in this embodiment includes: a processor 50, a memory 51, and a computer program 52 stored in the memory 51 and executable on the processor 50. When the processor 50 executes the computer program 52, it implements the steps in the Forsmark effect monitoring method embodiments of the various nuclear-level electrical devices described above, for example... Figure 2 Steps S101 to S103 are shown. Alternatively, when the processor 50 executes the computer program 52, it implements the functions of each module / unit in the above-described device embodiments, for example... Figure 4 The functions of modules 110 to 130 are shown.

[0095] For example, the computer program 52 may be divided into one or more modules / units, which are stored in the memory 51 and executed by the processor 50 to complete the present invention. The one or more modules / units may be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program 52 in the terminal 5.

[0096] The terminal 5 can be a computing device such as a desktop computer, laptop, handheld computer, or cloud server. The terminal 5 may include, but is not limited to, a processor 50 and a memory 51. Those skilled in the art will understand that... Figure 5 This is merely an example of terminal 5 and does not constitute a limitation on terminal 5. It may include more or fewer components than shown, or combine certain components, or different components. For example, the terminal may also include input / output devices, network access devices, buses, etc.

[0097] The processor 50 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0098] The memory 51 can be an internal storage unit of the terminal 5, such as a hard disk or memory of the terminal 5. The memory 51 can also be an external storage device of the terminal 5, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the terminal 5. Furthermore, the memory 51 can include both internal storage units and external storage devices of the terminal 5. The memory 51 is used to store the computer program and other programs and data required by the terminal. The memory 51 can also be used to temporarily store data that has been output or will be output.

[0099] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0100] This invention provides a nuclear-grade electrical device, which includes the terminal described above.

[0101] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0102] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0103] In the embodiments provided by this invention, it should be understood that the disclosed devices / terminals and methods can be implemented in other ways. For example, the device / terminal embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0104] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0105] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0106] If the integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium. When executed by a processor, the computer program can implement the steps of the Forsmark effect monitoring method embodiments for each of the above-described nuclear-level electrical devices. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content contained in the computer-readable medium may be appropriately added to or subtracted from the content as required by the legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium may not include electrical carrier signals and telecommunication signals.

[0107] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A method for monitoring the Forsmark effect in nuclear-grade electrical equipment, characterized in that, include: The modulus of the grid voltage input to nuclear-grade electrical equipment is obtained according to a preset monitoring cycle; The current monitoring period is matched with the Yth monitoring period preceding the current monitoring period, and the abrupt change ratio of the modulus value of the current monitoring period relative to the modulus value of the matched monitoring period is calculated. If the mutation ratios for the current monitoring period and the previous Y-1 monitoring periods are both greater than the mutation protection value, then it is determined that the nuclear-grade electrical equipment will experience the Forsmark effect. The calculation of the abrupt change ratio of the modulus value of the current monitoring period relative to the modulus value of the matching monitoring period includes: The mutation ratio is calculated based on the mutation ratio calculation formula, which calculates the mutation ratio of the modulus value of the current monitoring period relative to the modulus value of the matching monitoring period. The formula for calculating the mutation ratio is: in, This represents the mutation ratio of the modulus value in the Zth monitoring period. This represents the modulus value for the Zth monitoring period. This represents the modulus value of the Yth monitoring period preceding the Zth monitoring period.

2. The Forsmark effect monitoring method for nuclear-grade electrical equipment according to claim 1, characterized in that, The step of acquiring the modulus of the grid voltage input to nuclear-grade electrical equipment according to a preset monitoring cycle includes: The modulus of the grid voltage input to nuclear-grade electrical equipment is calculated based on the modulus calculation formula; The formula for calculating the modulus is: ； in, Indicates three-phase voltage. This represents the magnitude of the grid voltage.

3. The Forsmark effect monitoring method for nuclear-grade electrical equipment according to claim 1, characterized in that, After determining that the nuclear-grade electrical equipment is about to experience the Forsmark effect, the method further includes: Power-off protection is provided for the nuclear-grade electrical equipment.

4. The Forsmark effect monitoring method for nuclear-grade electrical equipment according to claim 1, characterized in that, After acquiring the modulus of the grid voltage input to the nuclear-grade electrical equipment according to a preset monitoring cycle, the method further includes: Determine if there are any remaining storage locations in the first array; if there are no remaining storage locations in the first array, delete the modulus value of the monitoring period that was first stored in the first array, and store the modulus value of the current monitoring period in the location of the latest deleted modulus value. The first array includes at least 2Y storage locations.

5. The Forsmark effect monitoring method for nuclear-grade electrical equipment according to claim 1, characterized in that, The method further includes: Get the mains power protection time set by the user; The corresponding Y value is determined based on the mains power protection time.

6. A Forsmark effect monitoring device for nuclear-grade electrical equipment, characterized in that, include: The modulus calculation module is used to obtain the modulus of the grid voltage input to nuclear-grade electrical equipment according to a preset monitoring cycle; The mutation ratio calculation module is used to match the current monitoring period with the Yth monitoring period before the current monitoring period, and calculate the mutation ratio of the modulus value of the current monitoring period relative to the modulus value of the matched monitoring period. The mutation monitoring module is used to determine that the nuclear-grade electrical equipment will experience the Forsmark effect if the mutation ratio corresponding to the current monitoring period and the previous Y-1 monitoring periods is greater than the mutation protection value. The mutation ratio calculation module includes: The mutation ratio is calculated based on the mutation ratio calculation formula, which calculates the mutation ratio of the modulus value of the current monitoring period relative to the modulus value of the matching monitoring period. The formula for calculating the mutation ratio is: in, This represents the mutation ratio of the modulus value in the Zth monitoring period. This represents the modulus value for the Zth monitoring period. This represents the modulus value of the Yth monitoring period preceding the Zth monitoring period.

7. A terminal, characterized in that, It includes a processor and a memory, the memory being used to store a computer program, and the processor being used to call and run the computer program stored in the memory to perform the method as described in any one of claims 1 to 5.

8. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method as described in any one of claims 1 to 5 above.

9. A nuclear-grade electrical device, characterized in that, Including the terminal as described in claim 7.

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