A calculation method, device and equipment for the current distribution coefficient of a multi-column parallel lightning arrester

Abstract

A method, device and equipment for calculating the current distribution coefficient of a multi-column parallel arrester. Randomly select 1 column of resistor chips in the resistor chip columns of the multi-column parallel arrester as the calibration column; match the remaining resistor chip columns into multiple resistor chip column groups; measure the current values passing through each resistor chip column when each resistor chip column group is respectively combined with the calibration column under a set impulse current; calculate the current standard values of each resistor chip column based on the current values of the resistor chip columns in each resistor chip column group and the calibration column; and then calculate the current distribution coefficients of each parallel resistor chip column. This solution can measure the current distribution coefficients and dispersions of each column of the multi-column parallel resistor chip columns, provide a basis for controlling the consistency of the current values of each parallel resistor chip column, solve the problem that the current distribution of the multi-column parallel resistor chip columns cannot be measured as a whole due to the capacity limitations of the test equipment and measurement devices, provide a measurement method for the accurate measurement of the current distribution of the multi-column parallel resistor chip columns, and the measurement method is simple and has high accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of arrester testing, and particularly relates to a method, device and equipment for calculating the current distribution coefficient of a multi-column parallel arrester. Background Art

[0002] In AC and DC power systems, for protective electrical appliances that limit overvoltage (such as arresters, voltage limiters, resistors, etc.), due to the requirements of protection level and energy absorption, multiple columns of resistor chip columns need to be connected in parallel, and even hundreds of columns of resistor chip columns need to be connected in parallel to meet the requirements for system protection. For multiple columns of parallel resistor chip columns, their current distribution characteristics are very crucial technical performances. In the standards for AC and DC arresters and series compensation devices (GB 11032, GB / T 22389, GB / T 25083, GB / T 6115.2, GB / T 25309), requirements for the current distribution unevenness coefficient of multiple columns of parallel resistor chips are specified. Generally, it is stipulated that the current distribution unevenness coefficient of multiple columns of parallel resistor chips shall not be greater than 1.05. The number of parallel resistor chip columns in an arrester can reach up to hundreds. It is particularly important to measure and control the current distribution of a multi-column parallel resistor chip arrester. If it is very difficult to measure the current distribution of the entire group of multiple columns of parallel resistor chip columns, a huge investment in test equipment is required. The existing methods for measuring current distribution can only determine the current distribution range of multiple columns of parallel resistor chip columns, and the measurement accuracy is low. Summary of the Invention

[0003] In view of this, embodiments of the present invention provide a method, device and equipment for calculating the current distribution coefficient of a multi-column parallel arrester to achieve accurate measurement of the current distribution of multiple columns of parallel resistor chip columns.

[0004] To achieve the above object, embodiments of the present invention provide the following technical solutions:

[0005] A method for calculating the current distribution coefficient of a multi-column parallel arrester includes:

[0006] Determine a calibration column in the target arrester, where the calibration column is one column of resistor chips among n columns of parallel resistor chip columns in the arrester, and n is a positive integer not less than 2;

[0007] Match the remaining n - 1 columns of resistor chips in the target arrester into m resistor chip column groups, where m is a positive integer less than n - 1;

[0008] Apply a set impulse current to the m resistor chip column groups and the calibration column simultaneously in sequence;

[0009] Based on the measurement results after sequentially applying a set impact current to the m resistor column groups and the calibration column, obtain the current values passing through each resistor column in the m resistor column groups and the current value passing through the calibration column respectively;

[0010] Respectively take the ratio of the current value passing through each resistor column in the m resistor column groups to the current value passing through the calibration column after simultaneously applying a set impact current as the current standard value;

[0011] Calculate the distribution coefficient of the n parallel resistor columns in the target arrester based on the current standard values corresponding to each resistor column.

[0012] Optionally, in the above method for calculating the current distribution coefficient of a multi-column parallel arrester, based on the measurement results after sequentially applying a set impact current to the m resistor column groups and the calibration column, obtaining the current values passing through each resistor column in the m resistor column groups and the current value passing through the calibration column respectively includes:

[0013] Based on the measurement results after sequentially applying a set impact current to each resistor column in the m resistor column groups and the calibration column, extract the current value I ij passing through each resistor, and the current value I bj passing through the calibration column; where the I ij represents the current value passing through the resistor column i in the j-th resistor column group among the m resistor column groups when applying a set impact current to the j-th resistor column group among the m resistor column groups and the calibration column, and the I bj represents the current value passing through the calibration column when applying a set impact current to the j-th resistor column group among the m resistor column groups and the calibration column simultaneously.

[0014] Optionally, in the above method for calculating the current distribution coefficient of a multi-column parallel arrester, respectively taking the ratio of the current values passing through each resistor column in the m resistor column groups to the current value passing through the calibration column after simultaneously applying a set impact current as the current standard value includes:

[0015] Based on the formula I i = I ij / I bj , calculate the current standard value I i corresponding to the resistor column i in the target arrester.

[0016] Optionally, in the above method for calculating the current distribution coefficient of a multi-column parallel arrester, the calculating the distribution coefficient of the n parallel resistor columns in the target arrester based on the current standard values corresponding to each resistor column includes:

[0017] Based on the formula Calculate the distribution coefficient β corresponding to the resistor column i in the target lightning arrester i ;

[0018] wherein, the i.e., represents the average value of the current standard values of n parallel resistor columns in the target lightning arrester

[0019] Optionally, in the above method for calculating the current distribution coefficient of a multi-column parallel lightning arrester, after calculating the distribution coefficients of the n-column parallel resistor columns in the target lightning arrester based on the current standard values corresponding to each resistor column, it further includes:

[0020] Calculating the dispersion of the target lightning arrester based on the distribution coefficients of the n-column parallel resistor columns

[0021] Optionally, in the above method for calculating the current distribution coefficient of a multi-column parallel lightning arrester, calculating the dispersion of the target lightning arrester based on the distribution coefficients of the n-column parallel resistor columns includes:

[0022] Based on the formula Calculate the dispersion of the target lightning arrester wherein, the is the average value of the β i

[0023] A device for calculating the current distribution coefficient of a multi-column parallel lightning arrester includes:

[0024] A calibration unit for determining a calibration column in the target lightning arrester, where the calibration column is one of the n parallel resistor columns in the lightning arrester, and n is a positive integer not less than 2;

[0025] A grouping unit for matching the remaining n - 1 resistor columns in the target lightning arrester into m resistor column groups, where m is a positive integer less than n - 1;

[0026] An impulse control unit for sequentially applying a set impulse current to the m resistor column groups and the calibration column simultaneously;

[0027] An acquisition unit for respectively obtaining the current values passing through each resistor column in the m resistor column groups and the current value passing through the calibration column based on the measurement results after sequentially applying the set impulse current to the m resistor column groups and the calibration column simultaneously;

[0028] A calculation unit for respectively taking the ratio of the current value passing through each resistor column in the m resistor column groups to the current value passing through the calibration column after simultaneously applying the set impulse current as the current standard value; calculating the distribution coefficients of the n-column parallel resistor columns in the target lightning arrester based on the current standard values corresponding to each resistor column​

[0029] Optionally, in the above multi-column parallel arrester current distribution coefficient calculation device, the acquisition unit is specifically configured to:

[0030] Based on the measurement results after sequentially applying a set impulse current to each resistor column and the calibration column in the m resistor column groups, extract the current value I passing through each resistor ij , and the current value I passing through the calibration column bj ; where the I ij represents the current value passing through the resistor column i in the jth resistor column group among the m resistor column groups and the calibration column when a set impulse current is applied, and the I bj represents the current value passing through the calibration column when a set impulse current is simultaneously applied to the jth resistor column group among the m resistor column groups and the calibration column.

[0031] Optionally, in the above multi-column parallel arrester current distribution coefficient calculation device, when the calculation unit takes the ratio of the current value passing through each resistor column in the m resistor column groups to the current value passing through the calibration column after simultaneously applying a set impulse current as the current standard value, it is specifically configured to:

[0032] Based on the formula I i = I ij / I bj , calculate the current standard value I i corresponding to the resistor column i in the target arrester.

[0033] A multi-column parallel arrester current distribution coefficient calculation device includes:

[0034] A memory and a processor;

[0035] The memory is used to store a program;

[0036] The processor is used to execute the program to implement each step of the multi-column parallel arrester current distribution coefficient calculation method described in any one of the above.

[0037] Based on the above technical solution, the method for calculating the current distribution coefficient of a multi-column parallel arrester provided by an embodiment of the present invention first randomly selects one column of resistor columns in the multi-column parallel resistor column group of the arrester as a calibration column; then randomly matches the remaining resistor columns into multiple resistor column groups; then measures the current values passing through the resistor columns in each group respectively with the calibration column under a set impulse current waveform and amplitude; then takes the ratio of the current values passing through each resistor column measured simultaneously with the calibration column in each resistor column group to the current value passing through the calibration column as the current standard value; finally, calculates the current distribution coefficient of each parallel resistor column. The method of the present invention can measure the current distribution coefficient and dispersion of each column of the multi-column parallel resistor column, provides a basis for controlling the consistency of the current values of each parallel resistor column, solves the problem that the current distribution of the multi-column parallel resistor column cannot be measured due to the capacity limitation of the test equipment and the measuring device, provides a measuring method for the accurate measurement of the current distribution of the multi-column parallel resistor column, and the measuring method is simple and has high accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0039] Figure 1 It is a schematic flowchart of the method for calculating the current distribution coefficient of a multi-column parallel arrester disclosed in an embodiment of the present application;

[0040] Figure 2 It is a schematic structural diagram of the device for calculating the current distribution coefficient of a multi-column parallel arrester disclosed in an embodiment of the present application;

[0041] Figure 3 It is a schematic structural diagram of the device for calculating the current distribution coefficient of a multi-column parallel arrester disclosed in an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] The present application provides a calculation scheme for the current distribution coefficient of a multi-column parallel lightning arrester, which can measure the current distribution coefficient and dispersion of each column of resistor discs in the multi-column parallel lightning arrester, solves the problem that the current distribution of the multi-column parallel resistor disc columns cannot be measured due to the capacity limitations of the test equipment and measurement devices, and provides a measurement method for the accurate measurement of the current distribution of the multi-column parallel resistor disc columns.

[0044] Correspondingly, the present application discloses a calculation method for the current distribution coefficient of a multi-column parallel lightning arrester. Refer to Figure 1 , the method includes:

[0045] Step S101: Determine the calibration column in the target lightning arrester. The calibration column is one column of resistor discs among the n columns of parallel resistor disc columns in the lightning arrester, where n is a positive integer not less than 2.

[0046] In this step, randomly select one column of resistor discs from the n columns of parallel resistor disc columns of the target lightning arrester as the calibration column.

[0047] Step S102: Match the remaining n - 1 columns of resistor discs in the target lightning arrester into m groups of resistor disc columns, where m is a positive integer less than n - 1.

[0048] Randomly match the remaining n - 1 columns of resistor disc columns in the target lightning arrester into m groups of resistor disc columns, and the value of m can be set by the user according to needs.

[0049] Step S103: Apply a set impulse current to each group of resistor disc columns in the m groups of resistor disc columns and the calibration column simultaneously in sequence.

[0050] In this step, apply a set impulse current to each group of resistor disc columns in the m groups of resistor disc columns and the calibration column simultaneously, that is, apply the set impulse current to the calibration column and the first group of resistor disc columns in the m groups of resistor disc columns for the first time, apply the set impulse current to the calibration column and the second group of resistor disc columns in the m groups of resistor disc columns for the second time, apply the set impulse current to the calibration column and the third group of resistor disc columns in the m groups of resistor disc columns for the third time, until applying the set impulse current to the calibration column and the mth group of resistor disc columns in the m groups of resistor disc columns for the mth time.

[0051] The set impulse current has a set impulse current waveform and amplitude. For example, the impulse current can be: 30 / 60 μs switching impulse current, 660 A ± 20 A current peak.

[0052] Step S104: Based on the measurement results after simultaneously applying a set impact current to each resistor column and the calibration column in the m resistor column groups respectively, obtain the current values passing through each resistor column in the m resistor column groups and the current value passing through the calibration column respectively.

[0053] In this step, after simultaneously applying a set impact current to each resistor column and the calibration column in the m resistor column groups respectively, signal detection is performed on each resistor column and the calibration column in the m resistor column groups respectively, and the current values passing through each resistor column in the m resistor column groups and the current value passing through the calibration column after simultaneously applying the set impact current can be obtained. For example, as shown in Table 1. In Table 1, the column number is the number of the resistor column in the target lightning arrester, the column number ∈ {1, 2, 3, ……, n}, the group number is the number of the resistor column group, the group number ∈ {1, 2, 3, ……, m}, and b1, b2, b3, ……, b8 respectively represent the measurement data of the standard columns corresponding to the resistor column groups to which the set impact current is simultaneously applied. Through measurement, the current values passing through each resistor column in the m resistor column groups and the current value passing through the calibration column after simultaneously applying the set impact current can be obtained respectively. For example, in Table 1, when a set impact current is applied to the first resistor column group and the calibration column, the current flowing through the resistor column with column number 1 is 169, the current flowing through the resistor column with column number 2 is 166, the current flowing through the resistor column with column number 3 is 167, and the current b1 flowing through the resistor column of the standard column is 165.

[0054] Table 1

[0055]

[0056]

[0057] Step S105: Take the ratio of the current value of each resistor column in the m resistor column groups respectively to the current value passing through the calibration column after simultaneously applying the set impact current as the current standard value.

[0058] In this step, after obtaining the current values passing through each resistor column in the m resistor column groups and the current value passing through the calibration column, according to the measurement results of each resistor column, that is, based on the measurement results after simultaneously applying a set impact current to each resistor column and the calibration column in the m resistor column groups respectively, extract the current value I ij passing through each resistor, and the current value I bj passing through the calibration column; specifically, the current standard value I i corresponding to the resistor column i in the target lightning arrester can be calculated through the formula I ij = I bj / Ii The calculation results are shown in Table 1, where i ∈ 1, 2, 3, ……, n - 1. The I ij represents the current value passing through the resistor column i in the jth resistor column group among the m resistor column groups and the calibration column when a set impact current is applied to the jth resistor column group and the calibration column among the m resistor column groups, and the I bj represents the current value passing through the calibration column when a set impact current is simultaneously applied to the jth resistor column group and the calibration column among the m resistor column groups. In I b is the current standard value of the calibration column. In this solution, the current standard value of the calibration column is defined as 1.

[0059] Step S106: Calculate the distribution coefficient of the n-column parallel resistor columns in the target lightning arrester based on the current standard values corresponding to each resistor column.

[0060] Specifically, this step can be: Calculate the current distribution coefficient βi of each parallel resistor column in the target lightning arrester (representing the current distribution coefficient of resistor column i), and the expression is: ( represents the average value of the currents of the n parallel resistor columns), and the expression of the average value of the currents of the n parallel resistor columns:

[0061] The method for calculating the current distribution coefficient of the multi-column parallel lightning arrester disclosed in the above embodiments of the present application first randomly selects 1 resistor column from the multi-column parallel resistor column group of the lightning arrester as the calibration column; then randomly matches the remaining resistor columns into multiple resistor column groups; then measures the current values passing through the resistor columns and the calibration column in each group respectively when each resistor column group and the calibration column are simultaneously under the set impact current waveform and amplitude; then takes the ratio of the current value passing through each resistor column measured simultaneously with the calibration column in each resistor column group to the current value passing through the calibration column as the current standard value; and finally calculates the current distribution coefficient of each parallel resistor column. The method of the present invention can measure the current distribution coefficient and dispersion of each column of the multi-column parallel resistor columns, provides a basis for controlling the consistency of the current values of each parallel resistor column, solves the problem that the current distribution of the multi-column parallel resistor columns cannot be measured as a whole due to the capacity limitations of the test equipment and measurement devices, provides a measurement method for the accurate measurement of the current distribution of the multi-column parallel resistor columns, and the measurement method is simple and has high accuracy.

[0062] Further, in this solution, after calculating the distribution coefficient of the n-column parallel resistor columns in the target lightning arrester based on the current standard values corresponding to each resistor column, the dispersion of the target lightning arrester can also be calculated based on the distribution coefficient of the n-column parallel resistor columns. Specifically, calculating the dispersion of the target lightning arrester based on the distribution coefficient of the n-column parallel resistor columns includes: Based on the formula The dispersion degree of the target lightning arrester is calculated wherein, the is the average value of the β i .

[0063] The following uses a specific embodiment to illustrate the technical solutions disclosed in the above embodiments of the present application.

[0064] Assume that the number of parallel columns of the target lightning arrester resistor columns is 25 columns, the current distribution unevenness coefficient of the parallel resistor columns is not greater than 1.05, and the dispersion degree is not greater than 0.02. The process of testing a current point of 25 parallel resistor columns by the present invention is as follows:

[0065] Step 1: Configure the resistor chips into 25 resistor columns, and the number of resistor columns n is from 1 column to 25 columns;

[0066] Step 2: Randomly match 24 resistor columns into 8 resistor column groups, and the number of resistor column groups j is from 1 group to 8 groups;

[0067] Step 3: Apply a 30 / 60 μs operating impulse current of 660 A ± 20 A to each resistor column group, and measure the current values passing through each resistor column group, as shown in Table 1;

[0068] Step 4: According to the measurement results of each resistor group, calculate the current standard value of each resistor column: I i = I ij / I bj , and the calculation results are shown in Table 1;

[0069] Step 5: Calculate the current distribution coefficient of each column: The calculation results are shown in Table 1.

[0070] Step 6: Calculate the dispersion degree of the current distribution coefficient:

[0071] The maximum current distribution coefficient of the 25 resistor columns measured by the present invention is 1.021, and the dispersion degree is 0.01487, meeting the requirements that the current distribution unevenness coefficient of the parallel resistor columns is not greater than 1.05 and the dispersion degree is not greater than 0.02.

[0072] This embodiment discloses a device for calculating the current distribution coefficient of a multi-column parallel lightning arrester. For the specific working content of each unit in the device, please refer to the content of the above method embodiment.

[0073] The following describes the device for calculating the current distribution coefficient of a multi-column parallel lightning arrester provided by the embodiment of the present invention. The device for calculating the current distribution coefficient of a multi-column parallel lightning arrester described below can be mutually corresponding and referred to with the method for calculating the current distribution coefficient of a multi-column parallel lightning arrester described above.

[0074] Specifically, refer toFigure 2 , in the above device:

[0075] The calibration unit A is used to determine the calibration column in the target lightning arrester, and the calibration column is one of the n parallel resistor column groups in the lightning arrester, where n is a positive integer not less than 2;

[0076] The grouping unit B is used to match the remaining n - 1 resistor columns in the target lightning arrester into m resistor column groups, where m is a positive integer less than n - 1;

[0077] The impulse control unit C is used to sequentially apply a set impulse current to each of the m resistor column groups and the calibration column;

[0078] The acquisition unit D is used to respectively obtain the current values passing through each resistor column in the m resistor column groups and the current value passing through the calibration column based on the measurement results of sequentially applying a set impulse current to each resistor column in the m resistor column groups and the calibration column at the same time;

[0079] The calculation unit E is used to respectively take the ratio of the current value passing through each resistor column in the m resistor column groups to the current value passing through the calibration column after applying the set impulse current as the current standard value; and calculate the distribution coefficient of the n parallel resistor column groups in the target lightning arrester based on the current standard values corresponding to each resistor column.

[0080] Corresponding to the above method, the acquisition unit D is specifically used for:

[0081] Based on the measurement results of sequentially applying a set impulse current to each resistor column in the m resistor column groups and the calibration column at the same time, extract the current value I passing through each resistor ij , the current value I passing through the calibration column bj ; where the I ij represents the current value passing through the resistor column i in the jth resistor column group in the m resistor column groups when a set impulse current is simultaneously applied to the jth resistor column group in the m resistor column groups and the calibration column, and the I bj represents the current value passing through the calibration column when a set impulse current is simultaneously applied to the jth resistor column group in the m resistor column groups and the calibration column.

[0082] Corresponding to the above method, when the calculation unit F respectively takes the ratio of the current value passing through each resistor column in the m resistor column groups to the current value passing through the calibration column as the current standard value, it is specifically used for:

[0083] Based on the formula I i = I ij / Ibj , calculate the standard current value I corresponding to the resistor column i in the target lightning arrester i .

[0084] Figure 3 The following is the hardware structure diagram of the multi-column parallel lightning arrester current distribution coefficient calculation device provided by the embodiment of the present invention. Refer to Figure 3 As shown, it may include: at least one processor 100, at least one communication interface 200, at least one memory 300, and at least one communication bus 400;

[0085] In the embodiment of the present invention, the number of the processor 100, the communication interface 200, the memory 300, and the communication bus 400 is at least one, and the processor 100, the communication interface 200, and the memory 300 complete mutual communication through the communication bus 400; obviously, Figure 3 The communication connection schematic diagram of the processor 100, the communication interface 200, the memory 300, and the communication bus 400 shown is only optional;

[0086] Optionally, the communication interface 200 may be an interface of a communication module, such as an interface of a GSM module;

[0087] The processor 100 may be a central processing unit CPU, or a specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present invention.

[0088] The memory 300 may include a high-speed RAM memory, and may also include a non-volatile memory, such as at least one disk memory.

[0089] Among them, the processor 100 is specifically used for:

[0090] Determine the calibration column in the target lightning arrester, where the calibration column is a column of resistor plates among the n columns of parallel resistor plates in the lightning arrester, and n is a positive integer not less than 2;

[0091] Match the remaining n-1 columns of resistor plates in the target lightning arrester into m resistor plate column groups, where m is a positive integer less than n-1;

[0092] Apply a set impulse current to the m resistor plate column groups and the calibration column in sequence;

[0093] Based on the measurement results after applying the set impulse current to the m resistor plate column groups and the calibration column in sequence, respectively obtain the current values passing through each resistor plate column in the m resistor plate column groups and the current value passing through the calibration column;

[0094] The ratio of the current value of each resistor column in the m resistor column groups to the current value of the calibration column after applying a set impulse current simultaneously is used as the current standard value;

[0095] Based on the current standard values corresponding to each resistor column, the distribution coefficient of the n parallel resistor columns in the target lightning arrester is calculated.

[0096] For the convenience of description, when describing the above system, various modules are described separately according to their functions. Of course, when implementing the present invention, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0097] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the differences between each embodiment and other embodiments are emphasized. In particular, for the system or system embodiments, since they are basically similar to the method embodiments, they are described relatively simply. For the relevant parts, refer to the description of the method embodiments. The systems and system embodiments described above are only illustrative. 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 distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative work.

[0098] Professionals can further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in this article can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0099] The steps of the method or algorithm described in combination with the embodiments disclosed in this article can be directly implemented by hardware, a software module executed by a processor, or a combination of the two. The software module can be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, register, hard disk, removable disk, CD-ROM, or any other form of storage medium well-known in the technical field.

[0100] It should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0101] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A calculation method for the current distribution coefficient of a multi-column parallel lightning arrester, characterized in that, Including: Determine the calibration column in the target lightning arrester, where the calibration column is one column of resistor plates among the n columns of parallel resistor plates in the lightning arrester, and n is a positive integer not less than 2; Match the remaining n - 1 columns of resistor plates in the target lightning arrester into m resistor plate column groups, where m is a positive integer less than n - 1; Sequentially apply a set impact current to the m resistor plate column groups and the calibration column simultaneously; Based on the measurement results after sequentially applying the set impact current to the m resistor plate column groups and the calibration column, respectively obtain the current values passing through each resistor plate column in the m resistor plate column groups and the current value passing through the calibration column; Respectively use the ratio of the current value passing through each resistor plate column in the m resistor plate column groups to the current value passing through the calibration column after simultaneously applying the set impact current as the current standard value; Calculate the distribution coefficient of the n columns of parallel resistor plates in the target lightning arrester based on the current standard values corresponding to each resistor plate column.

2. The method for calculating the current distribution coefficient of the multi-column parallel lightning arrester according to claim 1, characterized in that Based on the measurement results after sequentially applying the set impact current to the m resistor plate column groups and the calibration column, respectively obtain the current values passing through each resistor plate column in the m resistor plate column groups and the current value passing through the calibration column, including: Based on the measurement results after sequentially applying a set impact current to each resistor column and the calibration column in the m resistor column groups, extract the current value I passing through each resistor ij , the current value I passing through the calibration column bj ; where the I ij represents the current value passing through the resistor column i in the j-th resistor column group among the m resistor column groups and the calibration column when a set impact current is applied to the j-th resistor column group among the m resistor column groups and the calibration column, and the I bj represents the current value passing through the calibration column when a set impact current is simultaneously applied to the j-th resistor column group among the m resistor column groups and the calibration column.

3. The method for calculating the current distribution coefficient of the multi-column parallel lightning arrester according to claim 2, characterized in that Respectively use the ratio of the current value passing through each resistor plate column in the m resistor plate column groups to the current value passing through the calibration column after simultaneously applying the set impact current as the current standard value, including: Based on Formula I i = I ij / I bj , the standard current value I corresponding to the resistor column i in the target lightning arrester is calculated i .

4. The method for calculating the current distribution coefficient of the multi-column parallel lightning arrester according to claim 3, characterized in that, The calculating the distribution coefficient of the n columns of parallel resistor plates in the target lightning arrester based on the current standard values corresponding to each resistor plate column, including: Based on the formula calculate the distribution coefficient β corresponding to the resistor column i in the target lightning arrester i ; Among them, the i.e., represents the average value of the current standard values of n parallel resistor columns in the target arrester.

5. The method for calculating the current distribution coefficient of the multi-column parallel lightning arrester according to claim 4, wherein After calculating the distribution coefficient of the n columns of parallel resistor plates in the target lightning arrester based on the current standard values corresponding to each resistor plate column, further including: Calculate the dispersion of the target lightning arrester based on the distribution coefficient of the n columns of parallel resistor plates.

6. The method for calculating the current distribution coefficient of the multi-column parallel lightning arrester according to claim 5, wherein, Calculate the dispersion of the target lightning arrester based on the distribution coefficient of the n columns of parallel resistor plates, including: Based on the formula the dispersion of the target lightning arrester is calculated wherein, the is the average value of the β i ​ 7. A calculation device for the current distribution coefficient of a multi-column parallel lightning arrester, characterized in that, Including: A calibration unit for determining the calibration column in the target lightning arrester, where the calibration column is one column of resistor plates among the n columns of parallel resistor plates in the lightning arrester, and n is a positive integer not less than 2; A grouping unit for matching the remaining n - 1 columns of resistor plates in the target lightning arrester into m resistor plate column groups, where m is a positive integer less than n - 1; An impact control unit for sequentially applying a set impact current to the m resistor plate column groups and the calibration column simultaneously; An acquisition unit for respectively obtaining the current values passing through each resistor plate column in the m resistor plate column groups and the current value passing through the calibration column based on the measurement results after sequentially applying the set impact current to the m resistor plate column groups and the calibration column; A calculation unit for respectively using the ratio of the current value passing through each resistor plate column in the m resistor plate column groups to the current value passing through the calibration column after simultaneously applying the set impact current as the current standard value; calculating the distribution coefficient of the n columns of parallel resistor plates in the target lightning arrester based on the current standard values corresponding to each resistor plate column.

8. The device for calculating the current distribution coefficient of the multi-column parallel lightning arrester according to claim 7, characterized in that, The acquisition unit is specifically used for: Based on the measurement results after sequentially applying a set impact current to each resistor column and the calibration column in the m resistor column groups, extract the current value I passing through each resistor sheet. ij and the current value I passing through the calibration column bj ; where the I ij represents the current value passing through the resistor column i in the j-th resistor column group among the m resistor column groups and the calibration column when a set impact current is applied, and the I bj represents the current value passing through the calibration column when a set impact current is simultaneously applied to the j-th resistor column group among the m resistor column groups and the calibration column.

9. The multi-column parallel arrester current distribution coefficient calculation device according to claim 8, characterized in that When the calculation unit takes the ratio of the current value of each resistor column in the m resistor column groups to the current value of the calibration column after applying a set impact current simultaneously as the current standard value, it is specifically used for: Based on Formula I i = I ij / I bj , the standard current value I corresponding to the resistor column i in the target lightning arrester is calculated i .

10. A calculation device for the current distribution coefficient of a multi-column parallel lightning arrester, characterized in that, including: a memory and a processor; the memory is used for storing programs; the processor is used for executing the programs to implement each step of the multi-column parallel arrester current distribution coefficient calculation method according to any one of claims 1-6.

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