An online parameter setting method, system, device and medium

Abstract

The application discloses a setting method, system, device and medium for online calculation parameters, the method comprising: obtaining an actual fault recording file and analyzing and extracting a fault section time, a fault device, a fault type and a short-circuit current effective value; matching an initial online short-circuit current result according to the extracted fault recording information; calculating a deviation of the online short-circuit current and the recording value, adjusting a motor load proportionality coefficient and re-performing short-circuit current calculation until the deviation is smaller than a threshold value when the deviation is larger than the threshold value; and generating an alarm information according to the deviation of the online short-circuit current and the recording value and the motor load proportionality coefficient setting result. The application improves the online short-circuit current calculation accuracy, truly reflects the short-circuit current over-standard risk faced in the actual operation of the power grid, and provides a basis for dispatching operation personnel to take short-circuit current suppression measures. Thus, the problem that the prior art cannot accurately and reliably perform online short-circuit current calculation and analysis is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power system automation, and in particular to a setting method, system, device and medium for online calculation parameters. BACKGROUND

[0002] With the continuous development of the power system, the scale of the power grid is increasing, the capacity of the substation and the load density are increasing, and large-capacity generator units are successively connected to the power grid, which gradually increases the short-circuit current of the power system, seriously affecting the safe and stable operation of the power grid. The accuracy of online short-circuit current calculation is the key to real-time evaluation of whether the power grid faces the risk of exceeding the short-circuit current, and the accuracy of the calculation result is related to the online calculation parameters. However, the current online calculation parameters are often selected according to the international standard or formulated by artificial experience, so that there may be a large deviation between the online calculation result and the true value, and the actual short-circuit current level of the power grid cannot be truly reflected.

[0003] The fault recorder can record the current waveform when the short-circuit fault occurs, accurately monitor the actual short-circuit fault and short-circuit current of the power grid, and through analysis of the fault recording data, the size and duration of the short-circuit current can be obtained, and then the safety of the system under fault conditions can be evaluated. Using fault recording for checking and setting online calculation parameters, by adjusting the online calculation parameters and performing iterative calculation of the short-circuit current, the deviation between the calculation value and the recording value is within the allowable range, so that the online calculation parameters determined in this way are more in line with the actual power grid, which will further improve the accuracy of the online calculation result, thereby guiding the actual production operation. However, there is no effective method in the prior art that can meet this demand. SUMMARY

[0004] The present application provides a setting method, system, device and medium for online calculation parameters, which is used to solve the problem that the prior art cannot accurately and reliably carry out online calculation and analysis of short-circuit current.

[0005] Therefore, the first aspect of the present application provides a setting method for online calculation parameters, which comprises:

[0006] S1, obtaining a fault recording file and analyzing and extracting the fault recording file to obtain fault recording information, the fault recording information comprising: fault occurrence time, fault equipment, fault type, fault short-circuit current effective value and recording value;

[0007] S2, matching the initial online short-circuit current according to the fault recording information to obtain the online short-circuit current;

[0008] S3, calculating the difference between the online short-circuit current and the recording value, if the difference is less than a preset threshold, then performing S5, otherwise performing S4;

[0009] S4, adjust the motor load proportionality coefficient and calculate the value of the online short-circuit current, and return to S3 until the difference between the online short-circuit current and the recorded value is less than a preset threshold value, and the setting result of the motor load proportionality coefficient is obtained;

[0010] S5, generating an alarm information according to the difference between the online short-circuit current and the recorded value and the setting result.

[0011] Optionally, the fault type extraction method comprises:

[0012] based on the maximum value and the minimum value of the two-phase interphase current mutation amplitude , the fault type is determined according to the maximum value and the minimum value .

[0013] The maximum value and the minimum value are calculated by the following formula:

[0014] ;

[0015] In the formula, , , respectively, are the two-phase interphase short-circuit current mutations.

[0016] Optionally, the fault type is determined according to the maximum value and the minimum value , comprising:

[0017] If , it is a three-phase fault;

[0018] If , it is a two-phase fault;

[0019] If , it is a single-phase fault;

[0020] In the formula, is a threshold value, is a proportionality coefficient.

[0021] Optionally, the fault short-circuit current effective value extraction method comprises:

[0022] The fault short-circuit current effective value is calculated based on a fault short-circuit current effective value calculation formula;

[0023] Wherein, the fault short-circuit current effective value calculation formula is:​

[0024] ;

[0025] wherein, is the effective value of the fault short-circuit current, is the current value of the i-th sampling point in the recording data window containing the short-circuit current instantaneous value, is the total number of sampling points in the recording data window.

[0026] Optionally, step S2 comprises:

[0027] retrieving the online short-circuit current closest to the fault occurrence time and retrieving the current value of the online short-circuit current according to the fault device and the fault type. .

[0028] Optionally, step S4 comprises:

[0029] S41, if , the motor load proportion coefficient is adjusted upward and the adjustment space is equally divided into n parts, and the short-circuit current value when the motor load proportion coefficient is is calculated in turn. ; ;

[0030] S42, if , the motor load proportion coefficient is set to ;

[0031] S43, if , and , , the interval is equally divided into n parts, and steps S41 to S43 are repeated until is obtained so that ; ;

[0032] S44, if , the motor load proportion coefficient is adjusted downward and the adjustment space is equally divided into n parts, and the short-circuit current value when the motor load proportion coefficient is is calculated in turn. ; ;

[0033] S45, if , the motor load proportion coefficient is set to ;

[0034] S46, if , and​​​​ , , then the interval is equally divided into parts, and steps S44-S46 are repeated until is obtained, so that ;

[0035] wherein, is the effective value of the fault short-circuit current, is the current value of the online short-circuit current , is the preset threshold value, is the online short-circuit current calculation value when the motor load proportionality coefficient is .

[0036] Optionally, step S5 comprises:

[0037] S51, if , the alarm information is: the current fault equipment + the effective value of the fault short-circuit current + the current value of the online short-circuit current + the first difference between the online short-circuit current and the recorded wave value + the preset threshold value , without parameter setting;

[0038] S52, if , a second difference between the recorded wave value after parameter setting and the online short-circuit current is calculated , the alarm information is: the current fault equipment + the effective value of the fault short-circuit current + the current value of the online short-circuit current + the first difference between the online short-circuit current and the recorded wave value + the setting value of the motor load proportionality coefficient + the online short-circuit current value after parameter setting + the second difference + the preset threshold value .

[0039] The second aspect of the present application provides a parameter setting system for online calculation, comprising:

[0040] an acquisition unit configured to acquire a fault recorded wave file, analyze and extract the fault recorded wave file, and obtain fault recorded wave information, wherein the fault recorded wave information comprises: fault occurrence time, fault equipment, fault type, effective value of fault short-circuit current, and recorded wave value;

[0041] a matching unit configured to match an initial online short-circuit current according to the fault recorded wave information, and obtain an online short-circuit current;

[0042] a calculation unit configured to calculate a difference between the online short-circuit current and the recorded wave value, and trigger a generation unit if the difference is less than a preset threshold value, or trigger an adjustment unit otherwise;

[0043] the adjustment unit is configured to adjust a motor load proportionality coefficient, calculate a value of the online short-circuit current, and trigger a matching unit until the difference between the online short-circuit current and the recorded wave value is less than the preset threshold value, to obtain a setting result of the motor load proportionality coefficient;

[0044] the generation unit is configured to generate an alarm information according to the difference between the online short-circuit current and the recorded wave value and the setting result.

[0045] The third aspect of the present application provides a setting device for online calculation of parameters, comprising a processor and a memory:

[0046] The memory is configured to store program codes and transmit the program codes to the processor;

[0047] The processor is configured to execute steps of the setting method for online calculation of parameters according to instructions in the program codes.

[0048] The fourth aspect of the present application provides a computer readable storage medium for storing program codes, the program codes being used to execute the setting method for online calculation of parameters.

[0049] From the above technical solutions, the present application has the following advantages:

[0050] The present application provides a setting method for online calculation of parameters, comprising: obtaining an actual fault recorded wave file and parsing and extracting a fault section time, a fault device, a fault type and a short-circuit current effective value; matching an initial online short-circuit current result according to the extracted fault recorded wave information; calculating a deviation of the online short-circuit current from the recorded wave value, and adjusting a motor load proportionality coefficient and re-calculating the short-circuit current until the deviation is less than a preset threshold value when the deviation is greater than the threshold value; and generating an alarm information according to the deviation of the online short-circuit current from the recorded wave value and a setting result of the motor load proportionality coefficient.

[0051] Compared with the prior art, the present application can automatically match an online short-circuit current result according to a short-circuit current recorded wave value, iteratively calculate the short-circuit current by adjusting online calculation parameters, gradually reduce the deviation of the calculated short-circuit current value from the fault recorded wave value, and apply the set online calculation parameters to actual production operation, thereby improving the accuracy and reliability of online short-circuit current analysis. Thus, the problem that the prior art cannot accurately and reliably perform online calculation and analysis of short-circuit current is solved. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 A flowchart of a parameter setting method for online calculation provided in an embodiment of the present application;

[0053] Figure 2 A structural diagram of a parameter setting system for online calculation provided in an embodiment of the present application. DETAILED DESCRIPTION

[0054] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative work fall within the scope of protection of the present application.

[0055] Please refer to Figure 1 , a parameter setting method for online calculation provided in an embodiment of the present application, comprising:

[0056] Step 101, obtaining a fault recording file and performing analysis and extraction on the fault recording file to obtain fault recording information, the fault recording information including: fault occurrence time, fault equipment, fault type, fault short-circuit current effective value and recording value.

[0057] In an embodiment, the fault type extraction method in step 101 comprises:

[0058] Based on the maximum value and the minimum value , the maximum value and the minimum value of the two-phase interphase current sudden change quantity amplitude are calculated, and the fault type is determined according to the maximum value and the minimum value .

[0059] The maximum value and the minimum value are calculated by the following formula:

[0060] ;

[0061] In the formula, , , respectively are two-phase interphase short-circuit current sudden change quantities.

[0062] Among them, the fault type is determined according to the maximum value and the minimum value , comprising:

[0063] If , it is a three-phase fault;

[0064] If , it is a two-phase fault;

[0065] If , it is a single-phase fault;

[0066] In the formula, is a threshold value, is a proportional coefficient.

[0067] In one embodiment, the method for extracting the fault short-circuit current effective value in step 101 comprises:

[0068] calculating the fault short-circuit current effective value based on a fault short-circuit current effective value calculation formula;

[0069] wherein the fault short-circuit current effective value calculation formula is:

[0070]

[0071] In the formula, is a fault short-circuit current effective value, is a current value of the i-th sampling point in a recording wave data window containing a short-circuit current instantaneous value, is a total number of sampling points of the recording wave data window.

[0072] Step 102, matching the initial online short-circuit current according to the fault recording wave information to obtain an online short-circuit current.

[0073] In one embodiment, step 102 comprises:

[0074] retrieving an online short-circuit current closest to the fault occurrence time and retrieving a current value of the online short-circuit current according to the fault device and the fault type.

[0075] Step 103, calculating a difference value between the online short-circuit current and the recording wave value, if the difference value is less than a preset threshold value, executing step 105, otherwise executing step 104.

[0076] Step 104, adjusting a motor load proportional coefficient and calculating a value of the online short-circuit current, and returning to step 103 until the difference value between the online short-circuit current and the recording wave value is less than the preset threshold value, obtaining a setting result of the motor load proportional coefficient.

[0077] In one embodiment, step 104 comprises:

[0078] S41, if ​​​​then the motor load proportionality coefficient is adjusted upward and the adjustment space is is equally divided into parts, and the short-circuit current value when the motor load proportionality coefficient is is calculated in turn ;

[0079] S42, if , the motor load proportionality coefficient is set to ;

[0080] S43, if , and , , the interval is equally divided into parts, and steps S41 to S43 are repeated until is obtained so that ;

[0081] S44, if , the motor load proportionality coefficient is adjusted downward and the adjustment space is is equally divided into parts, and the short-circuit current value when the motor load proportionality coefficient is is calculated in turn ;

[0082] S45, if , the motor load proportionality coefficient is set to ;

[0083] S46, if , and , , the interval is equally divided into parts, and steps S44-S46 are repeated until is obtained so that ;

[0084] wherein, is the effective value of the fault short-circuit current, is the current value of the online short-circuit current , is a preset threshold value, is the online short-circuit current calculation value when the motor load proportionality coefficient is .

[0085] Step 105, generating an alarm information according to the difference between the online short-circuit current and the recorded value and the setting result.

[0086] In one embodiment, step 105 comprises:

[0087] S51, if When, the alarm information is: current fault device + fault short-circuit current effective value + online short-circuit current current value + first difference value between online short-circuit current and recorded wave value + preset threshold value Without parameter setting, the method has the advantages that

[0088] S52, if When, the second difference value between parameter setting recorded wave value and online short-circuit current is calculated , the alarm information is: current fault device + fault short-circuit current effective value + online short-circuit current current value + first difference value between online short-circuit current and recorded wave value + setting value of motor load proportion coefficient + online short-circuit current value after parameter setting + second difference value + preset threshold value .

[0089] The following is a simulation embodiment provided in the application:

[0090] In order to verify the beneficial effects of the application, simulation demonstration is carried out through actual fault recorded wave data and online calculation result instances. Specifically, based on actual power grid recorded wave measured data and online calculation result, the power grid line short-circuit fault measured recorded wave file is obtained and analyzed, the online initial short-circuit current calculation result is matched, the deviation range of the two is 1-2kA, after the online calculation parameter motor load proportion coefficient is set and iteratively calculated, the online calculation result is reduced, and is closer to the measured fault recorded wave current, the deviation range is controlled within 0.5kA. The specific simulation data is shown in Table 1 and Table 2.

[0091] Table 1: Comparison between fault recorded wave measured result and online initial calculation result

[0092]

[0093] Table 2: Comparison between fault recorded wave measured result and online parameter setting calculation result

[0094]

[0095] The embodiment of the application provides a short-circuit current online key calculation parameter setting method based on fault recording, which comprises the following steps: obtaining an actual fault recording file and analyzing and extracting a fault section time, a fault device, a fault type and a short-circuit current effective value; matching an initial online short-circuit current result according to the extracted fault recording information; calculating a deviation of the online short-circuit current and the recording value, adjusting a motor load proportionality coefficient when the deviation is greater than a set threshold value, and re-calculating the short-circuit current until the deviation is less than the threshold value; and generating an alarm information according to the deviation of the online short-circuit current and the recording value and the motor load proportionality coefficient setting result. The application improves the online short-circuit current calculation accuracy, truly reflects the short-circuit current over-standard risk in the actual operation of the power grid, and provides a basis for the dispatching operation personnel to take short-circuit current suppression measures. Thus, the problem that the prior art cannot accurately and reliably carry out online short-circuit current calculation and analysis is solved.

[0096] The above is a setting method of an online calculation parameter provided in the embodiment of the application, and the following is a setting system of an online calculation parameter provided in the embodiment of the application.

[0097] Please refer to Figure 2 The setting system of the online calculation parameter provided in the embodiment of the application comprises the following:

[0098] The acquisition unit 201 is configured to acquire a fault recording file and analyze and extract the fault recording file to obtain fault recording information, wherein the fault recording information comprises a fault occurrence time, a fault device, a fault type, a fault short-circuit current effective value and a recording value.

[0099] The matching unit 202 is configured to match an initial online short-circuit current according to the fault recording information to obtain an online short-circuit current.

[0100] The calculation unit 203 is configured to calculate a difference value of the online short-circuit current and the recording value, and if the difference value is less than a preset threshold value, the generation unit 205 is triggered, otherwise the adjustment unit 204 is triggered.

[0101] The adjustment unit 204 is configured to adjust a motor load proportionality coefficient and calculate a value of the online short-circuit current, and trigger the matching unit 203 until the difference value of the online short-circuit current and the recording value is less than the preset threshold value, so as to obtain a setting result of the motor load proportionality coefficient.

[0102] The generation unit 205 is configured to generate an alarm information according to the difference value of the online short-circuit current and the recording value and the setting result.

[0103] Further, the embodiment of the application further provides a setting device of an online calculation parameter, and the device comprises a processor and a memory.

[0104] The memory is configured to store program code and transmit the program code to the processor.

[0105] The processor is configured to execute steps of the online calculation parameter setting method according to instructions in the program code.

[0106] Further, the embodiments of the present application further provide a computer readable storage medium configured to store program code, and the program code is configured to execute the online calculation parameter setting method according to the above method embodiments.

[0107] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described system and unit can refer to the corresponding process in the above method embodiments, which will not be described here.

[0108] The terms "first", "second", "third", "fourth" and the like (if any) in the description and the above drawings of the present application are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0109] It should be understood that in the present application, "at least one" means one or more, and "multiple" means two or more. "And / or" is used to describe the association between the associated objects, which means that there can be three relationships, for example, "A and / or B" can represent three cases: only A, only B, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects. "At least one of the following" or similar expressions means any combination of these items, including single item or any combination of multiple items. For example, at least one of a, b or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0110] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other manners. For example, the described device embodiments are merely schematic. The division of the units is merely a logical function division. There can be another division manner for the 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. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0111] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0112] In addition, each functional unit in the various embodiments of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0113] When the integrated unit is realized 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 solutions of the present application essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (English full name: Read-Only Memory, English abbreviation: ROM), a random access memory (English full name: Random Access Memory, English abbreviation: RAM), a magnetic disk or an optical disk, and various program code storage media.

[0114] The above-described embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for tuning online calculation parameters, characterized in that, include: S1. Obtain the fault recording file and parse and extract the fault recording file to obtain fault recording information, which includes: fault occurrence time, faulty equipment, fault type, effective value of fault short-circuit current, and recording value. S2. Match the initial online short-circuit current according to the fault recording information to obtain the online short-circuit current; S3. Calculate the difference between the online short-circuit current and the recorded waveform value. If the difference is less than a preset threshold value, then execute S5; otherwise, execute S4. S4. Adjust the motor load ratio coefficient and calculate the value of the online short-circuit current, and return to S3 until the difference between the online short-circuit current and the recorded waveform value is less than a preset threshold value, and obtain the tuning result of the motor load ratio coefficient. S5. Generate alarm information based on the difference between the online short-circuit current and the recorded waveform value, as well as the setting result; Step S4 includes: S41, if Then, the motor load proportional coefficient is increased and its adjustment range is adjusted accordingly. Divided into equal parts The motor load proportionality coefficient is calculated sequentially as follows: Short-circuit current value at time ; S42, if The motor load proportional coefficient is then set to... ; S43, if ,and , Then the interval Divided into equal parts Repeat steps S41 to S43 until a sample is obtained. Make ; S44, if Then, the motor load ratio coefficient is lowered and its adjustment range is adjusted. Divided into equal parts The motor load proportionality coefficient is calculated sequentially as follows: Short-circuit current value at time ; S45, if The motor load proportional coefficient is then set to... ; S46, if ,and , Then the interval Divided into equal parts Repeat steps S44-S46 until you obtain [the desired product]. Make ; in, The effective value of the fault short-circuit current. The value of the online short-circuit current. The preset threshold value, The motor load proportionality coefficient is The calculated value of the online short-circuit current at that time.

2. The method for tuning online calculation parameters according to claim 1, characterized in that, The method for extracting the fault type includes: Based on maximum value and minimum value The calculation formula is used to calculate the maximum amplitude of the sudden change in current between two phases. and minimum value According to the maximum value and the minimum value Determine the type of fault; The maximum value and minimum value The calculation formula is: ； In the formula, , , These are the sudden changes in the phase-to-phase short-circuit current, respectively.

3. The method for tuning online calculation parameters according to claim 2, characterized in that, According to the maximum value and the minimum value Determine the type of fault, including: like If so, it is a three-phase fault; like If so, it is a two-phase fault; like If so, it is a single-phase fault; In the formula, This is the threshold value. This is the proportionality coefficient.

4. The method for tuning online calculation parameters according to claim 1, characterized in that, The method for extracting the effective value of the fault short-circuit current includes: The effective value of the fault short-circuit current is calculated based on the formula for calculating the effective value of the fault short-circuit current. The formula for calculating the effective value of the fault short-circuit current is as follows: ； In the formula, The first in the waveform data window containing the instantaneous value of the short-circuit current Current values ​​at each sampling point This represents the total number of sampling points in the waveform data window.

5. The method for tuning online calculation parameters according to claim 1, characterized in that, Step S2 includes: The time of retrieval of the cross-section and the time of occurrence of the fault The closest online short-circuit current is used to retrieve the current value of the online short-circuit current based on the faulty device and the fault type. .

6. The method for tuning online calculation parameters according to claim 1, characterized in that, Step S5 includes: S51, if At that time, the alarm information is: the current faulty device + the effective value of the fault short-circuit current. +The current value of the online short-circuit current +The first difference between the online short-circuit current and the recorded value +The preset threshold value No parameter tuning is required. S52, if At that time, the second difference between the recorded waveform value and the online short-circuit current after the parameters are adjusted is calculated. The alarm information is: the current faulty device + the effective value of the fault short-circuit current. +The current value of the online short-circuit current +The first difference between the online short-circuit current and the recorded value + The setting value of the motor load proportional coefficient +Online short-circuit current value after parameter tuning + the second difference +The preset threshold value .

7. An online parameter tuning system, characterized in that, include: The acquisition unit is used to acquire fault recording files and parse and extract fault recording files to obtain fault recording information, which includes: fault occurrence time, faulty equipment, fault type, effective value of fault short-circuit current, and recording value. The matching unit is used to match the initial online short-circuit current based on the fault recording information to obtain the online short-circuit current; The calculation unit is used to calculate the difference between the online short-circuit current and the recorded waveform value. If the difference is less than a preset threshold value, the generation unit is triggered; otherwise, the adjustment unit is triggered. The adjustment unit is used to adjust the motor load ratio coefficient and calculate the value of the online short-circuit current, and trigger the matching unit until the difference between the online short-circuit current and the recorded waveform value is less than a preset threshold value, so as to obtain the tuning result of the motor load ratio coefficient. A generation unit is used to generate alarm information based on the difference between the online short-circuit current and the recorded waveform value, as well as the setting result; The adjustment unit is specifically used for: S41, if Then, the motor load proportional coefficient is increased and its adjustment range is adjusted accordingly. Divided into equal parts The motor load proportionality coefficient is calculated sequentially as follows: Short-circuit current value at time ; S42, if The motor load proportional coefficient is then set to... ; S43, if ,and , Then the interval Divided into equal parts Repeat steps S41 to S43 until a sample is obtained. Make ; S44, if Then, the motor load ratio coefficient is lowered and its adjustment range is adjusted. Divided into equal parts The motor load proportionality coefficient is calculated sequentially as follows: Short-circuit current value at time ; S45, if The motor load proportional coefficient is then set to... ; S46, if ,and , Then the interval Divided into equal parts Repeat steps S44-S46 until you obtain [the desired product]. Make ; in, The effective value of the fault short-circuit current. The current value of the online short-circuit current. , The preset threshold value, The motor load proportionality coefficient is The calculated value of the online short-circuit current at that time.

8. An online parameter tuning device, characterized in that, The device includes a processor and a memory: The memory is used to store program code and transmit the program code to the processor; The processor is configured to execute the online calculation parameter tuning method according to any one of claims 1-6 based on the instructions in the program code.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store program code for executing the online calculation parameter tuning method according to any one of claims 1-6.

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