Overcurrent protection method, device, equipment and storage medium

Abstract

The present invention provides an overcurrent protection method, device, equipment and storage medium, including: when performing power factor correction, collecting the reactor current waveform of the target machine to determine all current sampling points therein; determining all peak points according to the origin current and all current sampling points; when all peak point data are greater than a preset protection threshold, controlling the target machine to shut down; all peak points are all peak points of the reactor current waveform. The present invention calculates the sawtooth peak value in real time during the control process of performing power factor correction, and uses the sawtooth peak value to replace the average current as the basis for judging software overcurrent. Using the sawtooth peak value as the basis for current overcurrent protection does not have theoretical errors, and is more accurate than the average value protection method. Especially when the sawtooth ripple is large, it can effectively improve the reliability of software overcurrent protection, greatly reduce the risk of overcurrent operation of the equipment, and ensure the safety of hardware equipment and the personal and property safety of users.

Description

Technical Field

[0001] The present invention relates to the field of current overcurrent protection, and in particular to an overcurrent protection method, device, equipment and storage medium. Background Art

[0002] Power factor refers to the ratio of active power to apparent power in an AC circuit. When the user's electrical equipment is under a certain voltage and power, the higher the value, the better the efficiency and the more fully the power generation equipment can be utilized.

[0003] Power factor correction is to make the fundamental current and voltage of the AC input as in phase as possible through software control, which can improve the power factor.

[0004] The boost chopper circuit can make the output voltage higher than the input voltage. It is mainly used in DC motor drives, single-phase power factor correction circuits and other AC and DC power supplies.

[0005] Compared with the existing control methods of variable frequency air conditioners, high-frequency power factor correction reduces the inductance used in the boost chopper circuit and increases the control frequency of the boost chopper circuit.

[0006] Figure 1 is a waveform diagram of obtaining the average value of the total current in the prior art, and the sawtooth wave is the reactor current waveform under power factor correction control, such as Figure 1 As shown in the figure, the dotted line is the current sampling reference, and its intersection with the sawtooth wave is the current sampling point. The circled line is the current sampling point, and the real-time value of the sawtooth wave at the moment of sampling is used as the average value of the total current. Obviously, there is a deviation between the circled sampling value and the peak value of the sawtooth wave, and the peak current of the sawtooth wave is greater than the sampling value.

[0007] Figure 2 This is a waveform diagram comparing the sawtooth wave peak value and the sampling value of the prior art. As shown in the figure, the sawtooth wave with a large amplitude is the reactor current waveform under high-frequency power factor correction control; the sawtooth wave with a small amplitude is the reactor current waveform under low-frequency power factor correction control; the dotted line is the current sampling reference, and its intersection with the sawtooth wave is the current sampling point. Obviously, the deviation between the sawtooth wave peak value and the sampling value under the high-frequency power factor correction control scheme becomes very large, and the adoption of Figure 1 The same process using the method shown will result in a large current deviation.

[0008] Combination Figure 1 as well as Figure 2 ,In the high-frequency power factor correction scheme, when the average value of the total ,current is used as the basis of software over-current protection, the deviation between the average ,current and the peak value of the sawtooth wave becomes much larger due to the reduction of the ,inductance, the current error increases significantly.

[0009] However, currently, there is no technical solution for improving the reliability of overcurrent protection, specifically, there is no overcurrent protection method, device, equipment and storage medium. Summary of the invention

[0010] The purpose of the present invention is to provide an overcurrent protection method, comprising:

[0011] In the case of performing power factor correction, collecting the reactor current waveform of the target machine to determine all current sampling points therein;

[0012] Determine all peak points based on the origin current and all current sampling points;

[0013] When all peak point data are greater than the preset protection threshold, the target machine is controlled to shut down;

[0014] The all crest points are all crest points of the reactor current waveform.

[0015] According to an overcurrent protection method provided by the present invention, the step of collecting the reactor current waveform of the target machine to determine all current sampling points therein includes:

[0016] Mapping the reactor current waveform and the current sampling reference in the same waveform diagram;

[0017] All current sampling points are determined according to the intersection points of the reactor current waveform and the current sampling reference.

[0018] According to an overcurrent protection method provided by the present invention, the step of collecting the reactor current waveform of the target machine to determine all current sampling points therein includes:

[0019] During the power factor correction process, each control cycle is sampled to obtain all current sampling points;

[0020] The current sampling point is the middle moment of the falling edge of each control cycle.

[0021] According to an overcurrent protection method provided by the present invention, determining all peak points according to the origin current and all current sampling points includes:

[0022] Determine the first wave peak point based on the origin current;

[0023] Determine a first wave valley point based on the first wave peak point and the first sampling point;

[0024] Determine the second wave peak point based on the first wave valley point;

[0025] Traverse all the trough points to determine all the peak points.

[0026] According to an overcurrent protection method provided by the present invention, the origin current determines the first wave peak point, including:

[0027] Determining the intermediate value based on the input voltage of the boost chopper circuit, the positive duty cycle of the current cycle, the control cycle, and the inductance of the boost chopper circuit;

[0028] A first peak point is determined based on the intermediate value and the origin current.

[0029] According to an overcurrent protection method provided by the present invention, determining the second wave peak point based on the first wave valley point includes:

[0030] A second wave peak point is determined based on the intermediate value and the first wave valley point.

[0031] According to an overcurrent protection method provided by the present invention, when all peak point data are greater than a preset protection threshold, controlling the target machine to shut down includes:

[0032] When any of the peak point data is greater than a preset protection threshold, the target machine is controlled to shut down;

[0033] Or, when the average value of all the peak point data is greater than a preset protection threshold, the target machine is controlled to shut down.

[0034] According to an overcurrent protection method provided by the present invention, the power factor correction is high-frequency power factor correction.

[0035] The present invention also includes an overcurrent protection device, which adopts the overcurrent protection method, including:

[0036] The first determining means is used to determine all current sampling points based on the reactor current waveform;

[0037] The second determining device is used to determine all the peak points according to the origin current and all the current sampling points;

[0038] Judgment device: When all peak point data are greater than the preset protection threshold, the machine is controlled to stop.

[0039] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned overcurrent protection method when executing the program.

[0040] The present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the overcurrent protection method as described above are implemented.

[0041] The present invention collects the reactor current waveform of the target machine to determine all current sampling points therein when executing power factor correction; determines each peak point one by one according to the origin current and all current sampling points to obtain all peak points; and controls the target machine to shut down when all peak point data are greater than a preset protection threshold. The present invention can calculate the sawtooth wave peak value in real time during the control process of executing power factor correction, and use the sawtooth wave peak value instead of the average current as the basis for judging software overcurrent. Using the sawtooth wave peak value as the basis for current overcurrent protection does not have theoretical errors and is more accurate than the average value protection method. Especially when the sawtooth wave ripple is large, the reliability of software overcurrent protection can be effectively improved, the risk of overcurrent operation of the equipment can be greatly reduced, and the safety of hardware equipment and the personal and property safety of users can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 It is a waveform diagram of obtaining the average value of the total current in the prior art;

[0044] Figure 2 It is a waveform diagram of the comparison between the sawtooth wave peak value and the sampling value in the prior art;

[0045] Figure 3 It is a flow chart of an overcurrent protection method provided by the present invention;

[0046] Figure 4 It is a schematic diagram of a process for determining all current sampling points provided by the present invention;

[0047] Figure 5 It is a schematic diagram of the process of determining all wave peak points provided by the present invention;

[0048] Figure 6 is a schematic diagram of a process for determining a first wave peak point provided by the present invention;

[0049] Figure 7 It is a waveform schematic diagram for determining all wave crest points provided by the present invention;

[0050] Figure 8 It is a structural schematic diagram of an overcurrent protection device provided by the present invention;

[0051] Fig. 9 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0053] Combine the following Figure 3-Figure 9 Specific embodiments of the present invention are described.

[0054] Figure 3 The present invention is a flow chart of an overcurrent protection method provided by the present invention. The present invention determines the peak value of the real-time current to achieve overcurrent protection based on the peak value, including:

[0055] In the case of performing power factor correction, collecting the reactor current waveform of the target machine to determine all current sampling points therein;

[0056] Determine all peak points based on the origin current and all current sampling points;

[0057] When all peak point data are greater than the preset protection threshold, the target machine is controlled to shut down;

[0058] The all crest points are all crest points of the reactor current waveform.

[0059] First, enter step S101, and collect the reactor current waveform of the target machine under the condition of performing power factor correction to determine all current sampling points therein. The present invention aims to calculate the reactor current waveform obtained under the condition of performing power factor correction, especially to obtain the current waveform under the condition of high-frequency power factor correction control. Those skilled in the art understand that the current waveform under the condition of high-frequency power factor correction control will have a reduced inductance compared to the current waveform under the condition of low-frequency power factor correction control, and the deviation between the current average value and the sawtooth peak value is large, and the current error is greatly increased, that is, all current sampling points obtained by the present invention are based on the average value of the current that is usually used as the detection standard for whether to adopt overcurrent protection in the prior art.

[0060] Those skilled in the art understand that the software used in the present invention is the software existing in the target appliance, and the target appliance is not limited to the application in the field of air conditioning, but may also include other home appliances, electric vehicles and other application occasions.

[0061] Then, step S102 is entered to determine all the peak points according to the origin current and all the current sampling points. The present invention uses the origin current as the starting calculation point and calculates each peak point one by one to determine all the peak points.

[0062] Finally, entering step S103, when all the peak point data are greater than the preset protection threshold, the target machine is controlled to shut down, that is, the present invention uses the peak point data as a standard for judging whether the software adopts overcurrent protection. The preset protection threshold can be selected according to actual conditions. For example, it can be set according to a unified national safety standard, or it can be set based on different standards for each machine. All the peak points are all the peak points of the reactor current waveform, that is, the peak points are based on the reactor current waveform collected when performing power factor correction.

[0063] The present invention can calculate the sawtooth wave peak value in real time during the control process of executing power factor correction, and use the sawtooth wave peak value instead of the average current as the judgment basis for software overcurrent. There is no theoretical error in using the sawtooth wave peak value as the basis for current overcurrent protection, which is more accurate than the average value protection method. Especially when the sawtooth wave ripple is large, it can effectively improve the reliability of software overcurrent protection, greatly reduce the risk of overcurrent operation of equipment, and ensure the safety of hardware equipment and the personal and property safety of users.

[0064] Figure 4 is a schematic diagram of a process for determining all current sampling points provided by the present invention. The present invention provides two technical solutions for achieving the determination of all current sampling points. As one of the technical solutions, it includes:

[0065] Mapping the reactor current waveform and the current sampling reference in the same waveform diagram;

[0066] All current sampling points are determined according to the intersection points of the reactor current waveform and the current sampling reference.

[0067] First, enter step S1011, map the reactor current waveform and the current sampling reference in the same waveform diagram, establish a waveform diagram based on the horizontal axis coordinate parameters, and map the reactor current waveform and the current sampling reference in the same waveform diagram based on the same standard of the horizontal axis coordinate parameters.

[0068] Then, enter step S1012, determine all current sampling points according to the intersection points of the reactor current waveform and the current sampling reference, the reactor current waveform is a sawtooth waveform, and the current sampling reference is a parabola, the reactor current waveform and the current sampling reference may have multiple intersections, and the present invention determines all intersection points of the reactor current waveform and the current sampling reference as all current sampling points.

[0069] As another technical solution, the collecting of the reactor current waveform of the target machine to determine all current sampling points therein includes:

[0070] During the power factor correction process, each control cycle is sampled to obtain all current sampling points;

[0071] The current sampling point is the middle moment of the falling edge of each control cycle.

[0072] The present invention can also obtain all current sampling points by sampling each control cycle during the power factor correction process. In such an embodiment, the current sampling point is the middle moment of the falling edge of each control cycle, that is, the reactor current waveform in the power factor correction process is first divided into multiple control cycles, and then the sampling point of the control cycle at the middle moment of the falling edge is determined, and the sampling point is used as the current sampling point to determine all current sampling points in all control cycles.

[0073] Figure 5 It is a schematic diagram of a process for determining all wave crest points provided by the present invention, including:

[0074] Determine the first wave peak point based on the origin current;

[0075] Determine a first wave valley point based on the first wave peak point and the first sampling point;

[0076] Determine the second wave peak point based on the first wave valley point;

[0077] Traverse all the trough points to determine all the peak points.

[0078] First, enter step S2011, determine the first wave crest point based on the origin current. In such an embodiment, the first wave crest point is determined by adding the origin current to an intermediate value. The present invention will combine Figure 6 The method of determining the first wave peak point based on the origin current is further described. Figure 6 The present invention provides a flow chart of determining the first wave peak point based on the origin current, including:

[0079] Determining the intermediate value based on the input voltage of the boost chopper circuit, the positive duty cycle of the current cycle, the control cycle, and the inductance of the boost chopper circuit;

[0080] A first peak point is determined based on the intermediate value and the origin current.

[0081] In step S20111, an intermediate value is determined based on the input voltage of the boost chopper circuit, the positive duty cycle of the current cycle, the control cycle, and the inductance of the boost chopper circuit. The intermediate value can be obtained by V in *D n *Ts / L determines, where the V in The input voltage of the switching DC boost circuit is D n For the positive duty cycle of the current cycle, the T s is the control period, and L is the inductance of the switching DC boost circuit.

[0082] In step S20112, a first wave peak point is determined based on the intermediate value and the origin current. The first wave peak point can be determined based on the origin current by the following formula:

[0083] I A =I o +V in *D n *T s / L (1)

[0084] In formula (1), I A is the first wave peak point, the I o is the origin current, the V in The input voltage of the switching DC boost circuit is D n For the positive duty cycle of the current cycle, the T s is the control period, and L is the inductance of the switching DC boost circuit.

[0085] Then, proceed to step S2012, determining a first wave valley point based on the first wave peak point and the first sampling point, such as Figure 7 As shown, Figure 7 The present invention provides a waveform diagram for determining all wave crest points. Figure 7 The corresponding calculation formula describes in more detail how to determine all the wave peak points. The first wave valley point determined based on the first wave peak point and the first sampling point can be determined by the following formula:

[0086] I C =2*I B –I A (2)

[0087] In formula (2), I C is the first trough point, the I B is the first sampling point, the I A The first peak point.

[0088] Then, the process proceeds to step S2013, where a second wave peak point is determined based on the first wave valley point, wherein the determining of the second wave peak point based on the first wave valley point includes determining the second wave peak point based on the intermediate value and the first wave valley point.

[0089] Further, the determining of the second wave peak point based on the intermediate value and the first wave valley point comprises the following formula:

[0090] I D =I C+ V in *D n *T s / L (3)

[0091] In formula (3), I D is the second wave peak point, the I C is the first valley point, the V in The input voltage of the switching DC boost circuit is D n For the positive duty cycle of the current cycle, the T s is the control period, and L is the inductance of the switching DC boost circuit.

[0092] Finally, enter step S2014, traverse all trough points to determine all peak points, such as Figure 7 As shown, the first wave peak point can be determined according to the origin current, and the first wave peak point can determine the first wave valley point, and then the second wave peak point and the second wave valley point can be determined, and the calculation is carried out in this way until all the wave valley points and all the wave peak points are determined.

[0093] The present invention realizes rapid determination of the peak point through the technical solutions in step S2011 to step S2014, so as to realize over-current protection based on the peak value, and the detection result is more accurate and sensitive, which greatly improves the safety of the electrical appliance.

[0094] Figure 8 is a schematic diagram of the structure of an overcurrent protection device provided by the present invention. The present invention also provides an overcurrent protection device, which adopts Figures 3 to 7 The overcurrent protection method described in the foregoing includes a first determining device 1 for determining all current sampling points based on the reactor current waveform. The working principle of the first determining device 1 can refer to the aforementioned step S101 and will not be described in detail here.

[0095] The overcurrent protection device further includes a second determining device 2 for determining all wave crest points according to the origin current and all current sampling points. The working principle of the second determining device 2 can refer to the aforementioned step S102 and will not be described in detail here.

[0096] The overcurrent protection device also includes a judgment device 3, which is used to control the machine to stop when all peak point data are greater than a preset protection threshold. The working principle of the judgment device 3 can refer to the aforementioned step S103 and will not be repeated here.

[0097] The present invention can calculate the sawtooth wave peak value in real time during the control process of executing power factor correction, and use the sawtooth wave peak value instead of the average current as the judgment basis for software overcurrent. There is no theoretical error in using the sawtooth wave peak value as the basis for current overcurrent protection, which is more accurate than the average value protection method. Especially when the sawtooth wave ripple is large, it can effectively improve the reliability of software overcurrent protection, greatly reduce the risk of overcurrent operation of equipment, and ensure the safety of hardware equipment and the personal and property safety of users.

[0098] Fig. 9 is a schematic diagram of the structure of the electronic device provided by the present invention, Fig. 9 An example of a physical structure diagram of an electronic device is shown in FIG. Fig. 9 As shown, the electronic device may include: a processor 310, a communication interface 320, a memory 330 and a communication bus 340, wherein the processor 310, the communication interface 320 and the memory 330 communicate with each other through the communication bus 340. The processor 310 may call the logic instructions in the memory 330 to execute the overcurrent protection method, which includes: when performing power factor correction, collecting the reactor current waveform of the target machine to determine all current sampling points therein; determining all peak points according to the origin current and all current sampling points; when all peak point data are greater than a preset protection threshold, controlling the target machine to shut down; the all peak points are all peak points of the reactor current waveform.

[0099] In addition, the logic instructions in the above-mentioned memory 330 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0100] On the other hand, the present invention also provides a computer program product, which includes a computer program, which can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the overcurrent protection method provided by the above methods, and the method includes: when performing power factor correction, collecting the reactor current waveform of the target machine to determine all current sampling points therein; determining all peak points based on the origin current and all current sampling points; when all peak point data are greater than a preset protection threshold, controlling the target machine to shut down; the all peak points are all peak points of the reactor current waveform.

[0101] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the overcurrent protection method provided by the above-mentioned methods, the method comprising: when performing power factor correction, collecting the reactor current waveform of the target machine to determine all current sampling points therein; determining all peak points based on the origin current and all current sampling points; when all peak point data are greater than a preset protection threshold, controlling the target machine to shut down; the said all peak points are all peak points of the reactor current waveform.

[0102] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0103] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. 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. An overcurrent protection method, characterized in that: include: In the case of performing power factor correction, collecting the reactor current waveform of the target machine to determine all current sampling points therein; Determine all the peak points according to the origin current and all the current sampling points, wherein the origin current is the starting calculation point for calculating the peak points; When all peak point data are greater than the preset protection threshold, the target machine is controlled to shut down; All the peak points are all the peak points of the reactor current waveform; The collecting of the reactor current waveform of the target machine to determine all current sampling points therein includes: Establishing a waveform diagram based on the horizontal axis coordinate parameters, and mapping the reactor current waveform and the current sampling reference into the same waveform diagram based on the same standard of the horizontal axis coordinate parameters; Determining all current sampling points according to the intersection of the reactor current waveform and the current sampling reference; Determining all the peak points according to the origin current and all the current sampling points includes: Determine the first wave peak point based on the origin current; Determine a first wave valley point based on the first wave peak point and the first sampling point; Determine the second wave peak point based on the first wave valley point; Traverse all the trough points to determine all the peak points.

2. The overcurrent protection method according to claim 1, characterized in that: The collecting of the reactor current waveform of the target machine to determine all current sampling points therein includes: During the power factor correction process, each control cycle is sampled to obtain all current sampling points; The current sampling point is the middle moment of the falling edge of each control cycle.

3. The overcurrent protection method according to claim 1, characterized in that: The origin current determines the first wave peak point, including: Determining the intermediate value based on the input voltage of the boost chopper circuit, the positive duty cycle of the current cycle, the control cycle, and the inductance of the boost chopper circuit; A first peak point is determined based on the intermediate value and the origin current.

4. The overcurrent protection method according to claim 3, characterized in that: The determining of the second wave peak point based on the first wave valley point comprises: A second wave peak point is determined based on the intermediate value and the first wave valley point.

5. The overcurrent protection method according to claim 1, characterized in that: When all the peak point data are greater than the preset protection threshold, controlling the target machine to shut down includes: When any of the peak point data is greater than a preset protection threshold, the target machine is controlled to shut down; Or, when the average value of all the peak point data is greater than a preset protection threshold, the target machine is controlled to shut down.

6. The overcurrent protection method according to claim 1, characterized in that: The power factor correction is high frequency power factor correction.

7. An overcurrent protection device, which adopts the overcurrent protection method according to any one of claims 1 to 6, characterized in that: include: The first determining means is used to determine all current sampling points based on the reactor current waveform; The second determining means is used to determine all the peak points according to the origin current and all the current sampling points, wherein the origin current is the starting calculation point for calculating the peak points; Judgment device: when all peak point data are greater than the preset protection threshold, the machine is controlled to stop; The collecting of the reactor current waveform of the target machine to determine all current sampling points therein includes: Establishing a waveform diagram based on the horizontal axis coordinate parameters, and mapping the reactor current waveform and the current sampling reference into the same waveform diagram based on the same standard of the horizontal axis coordinate parameters; Determining all current sampling points according to the intersection of the reactor current waveform and the current sampling reference; The method of determining all peak points according to the origin current and all current sampling points includes: Determine the first wave peak point based on the origin current; Determine a first wave valley point based on the first wave peak point and the first sampling point; Determine the second wave peak point based on the first wave valley point; Traverse all the trough points to determine all the peak points.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the overcurrent protection method according to any one of claims 1 to 6 are implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the overcurrent protection method according to any one of claims 1 to 6 are implemented.

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