Method and system for monitoring defects of a resistance disc of a controllable self-restoring energy-dissipating device arrester

Abstract

The present application relates to a kind of controllable self-restoring energy dissipation device lightning arrester resistance sheet defect monitoring method and system, including the following contents: determine the maximum parallel column number of each group of energy absorption lightning arrester of controllable self-restoring energy dissipation device energy absorption lightning arrester;Based on the maximum parallel column number of each group of energy absorption lightning arrester, actual parallel column number and monitoring CT accuracy requirement that meet preset economic and technical conditions are obtained;Based on the actual parallel column number determined, controllable self-restoring energy dissipation device energy absorption lightning arrester is grouped, and monitoring CT is arranged in each group, and the defects of resistance sheet in controllable self-restoring energy dissipation device energy absorption lightning arrester are monitored.The present application is monitored by grouping, optimizes the configuration of monitoring CT, reduces the configuration number of CT, and effectively measures the non-uniform coefficient of fixed part.The present application can be widely applied in high-voltage direct-current transmission field.

Description

Technical Field

[0001] This invention relates to a method and system for monitoring defects in the resistor elements of a surge arrester, and more particularly to a method and system for monitoring defects in the resistor elements of the fixed part of an energy-absorbing surge arrester in a controllable self-recovering energy dissipation device, belonging to the field of high-voltage direct current transmission. Background Technology

[0002] China's energy resources and energy demand are inversely distributed. Conventional DC transmission systems are widely used due to their advantages of long distance, large capacity, and low loss. DC transmission projects typically construct sending-end converter stations in resource-rich areas with weak power grids. When a commutation failure or DC fault blockage occurs at the receiving end of the DC system, transient overvoltages can occur on the AC bus of the sending-end converter station. To reduce overvoltage, the transmission power of the DC system is often limited, which is detrimental to maximizing the potential of large DC energy channels. Using controllable self-recovering energy dissipation devices can effectively limit the overvoltage level at the sending end of high-voltage DC projects and increase the transmission power of the DC projects.

[0003] Controllable self-resetting energy dissipation devices use zinc oxide surge arresters as energy absorption devices. These arresters consist of a fixed section and a controllable section connected in series. To control overvoltage in AC systems, multiple surge arresters are typically connected in parallel. However, the resistive elements of the fixed section of the surge arrester in a controllable self-resetting energy dissipation device are prone to defects after each energy absorption. Their condition must be monitored to ensure reliable operation during the next energy absorption process. In conventional methods, each surge arrester is equipped with a monitoring current transformer (CT), which results in complex engineering layouts, high costs, and low cost-effectiveness. Summary of the Invention

[0004] To address the aforementioned problems, the purpose of this invention is to provide a method and system for monitoring defects in the resistor element of a controllable self-recovering energy dissipation device surge arrester. This method can effectively monitor the non-uniformity coefficient of the fixed part of the surge arrester using fewer monitoring CTs, thus reflecting the operating status of the surge arrester.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, the present invention provides a method for monitoring defects in the resistor element of a controllable self-recovering energy dissipation device surge arrester, comprising the following:

[0007] Determine the maximum number of parallel columns for each group of energy-absorbing surge arresters in a controllable self-recovering energy dissipation device;

[0008] Based on the maximum number of parallel columns in each group of energy-absorbing surge arresters, the actual number of parallel columns that meet the preset requirements and the accuracy requirements of the monitoring CT are obtained.

[0009] Based on the determined actual number of parallel columns, the energy-absorbing arresters of the controllable self-recovering energy dissipation device are grouped, and monitoring CTs are deployed in each group to monitor the defects of the resistor elements in each group of energy-absorbing arresters of the controllable self-recovering energy dissipation device.

[0010] Furthermore, determining the maximum number of parallel columns for each group of energy-absorbing surge arresters in the controllable self-recovering energy dissipation device includes:

[0011] Determine the non-uniformity coefficient of a single column in the fixed part of a controllable self-recovering energy dissipation device energy-absorbing surge arrester under sound conditions;

[0012] After a stunted section appears in the fixed part of the energy-absorbing arrester of the controllable self-recovering energy dissipation device, the non-uniformity coefficient of the single column is taken as the minimum non-uniformity coefficient under the stunted section state.

[0013] Based on the non-uniformity coefficient of a single column under the healthy state and the minimum non-uniformity coefficient under the short plate state, the maximum number of parallel columns for each group of energy-absorbing surge arresters is calculated.

[0014] Furthermore, the non-uniformity coefficient of a single column in the intact state and the minimum non-uniformity coefficient in the short plate state of the fixed part of the controllable self-recovering energy dissipation device and the energy-absorbing arrester were determined by experiment.

[0015] Furthermore, the formula for calculating the maximum number of parallel columns for each group of energy-absorbing surge arresters is as follows:

[0016] β*n<(n-1)*1+α

[0017] Where α and β are the minimum non-uniformity coefficients in the short-plate state and the non-uniformity coefficients of a single column in the healthy state, respectively; n is the maximum number of parallel columns for each group of energy-absorbing surge arresters, and n is an integer.

[0018] Furthermore, the process of obtaining the actual number of parallel columns and the monitoring CT accuracy requirements that meet preset conditions based on the maximum number of parallel columns in each group of energy-absorbing surge arresters includes:

[0019] Based on the maximum number of parallel columns for each group of energy-absorbing surge arresters, the accuracy requirement of the monitoring CT corresponding to the current number of parallel columns is calculated.

[0020] Determine whether the accuracy requirement of the current monitoring CT meets the preset conditions. If not, reduce the number of parallel columns of each group of energy-absorbing surge arresters by the preset step size and return to the previous step until the actual number of parallel columns and the corresponding monitoring CT accuracy requirements are obtained.

[0021] Furthermore, based on the maximum number of parallel columns in each group of energy-absorbing surge arresters, the accuracy requirement of the monitoring CT corresponding to the current number of parallel columns is calculated using the following formula:

[0022] [(n-1)*1+α](1-x)>β*n(1+x)

[0023] Where α and β are the minimum non-uniformity coefficients in the dwarf state and the non-uniformity coefficients of a single column in the healthy state, respectively, and n is the maximum number of parallel columns.

[0024] Secondly, the present invention provides a controllable self-recovering surge arrester resistor element defect monitoring system, comprising:

[0025] The maximum number of parallel columns determination module is used to determine the maximum number of parallel columns for each group of energy-absorbing surge arresters in a controllable self-recovering energy dissipation device;

[0026] The CT accuracy determination module is used to obtain the actual number of parallel columns and the monitoring CT accuracy requirements based on the maximum number of parallel columns of each group of energy-absorbing surge arresters, which meet the preset conditions.

[0027] The defect monitoring module is used to group the energy-absorbing arresters of the controllable self-recovering energy dissipation device based on the determined actual number of parallel columns, and to deploy monitoring CTs in each group to monitor the defects of the resistor elements in each group of energy-absorbing arresters of the controllable self-recovering energy dissipation device.

[0028] Furthermore, the maximum number of parallel columns determination module includes:

[0029] A module for calculating the non-uniformity coefficient of a single column is established to determine the non-uniformity coefficient of a single column in the intact state of the fixed part of the energy-absorbing arrester of the controllable self-recovering energy dissipation device.

[0030] The module for calculating the non-uniformity coefficient of a single column in the state of a dwarf plate is used to determine the non-uniformity coefficient of the single column after a dwarf plate appears in the fixed part of the energy-absorbing arrester of the controllable self-recovering energy dissipation device, and it is used as the minimum non-uniformity coefficient in the state of a dwarf plate.

[0031] The maximum number of parallel columns calculation module is used to calculate the maximum number of parallel columns for each group of energy-absorbing surge arresters based on the non-uniformity coefficient of a single column in the healthy state and the minimum non-uniformity coefficient in the short-plate state.

[0032] Thirdly, the present invention provides a processing device, which includes at least a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the steps of the method for monitoring defects in the resistor element of the surge arrester of the controllable self-recovering energy dissipation device when running the computer program.

[0033] Fourthly, the present invention provides a computer storage medium storing computer-readable instructions thereon, which can be executed by a processor to implement the steps of the method for monitoring defects in the resistor element of the surge arrester of the controllable self-recovering energy dissipation device.

[0034] The present invention has the following advantages due to the adoption of the above technical solutions:

[0035] 1. This invention optimizes the configuration of monitoring CT by using group monitoring, reduces the number of CTs required, and effectively measures the non-uniformity coefficient of the fixed part.

[0036] 2. This invention can monitor the measurement accuracy of CT by selecting an appropriate number of parallel columns and non-uniformity coefficient according to the actual engineering situation.

[0037] Therefore, this invention can be widely applied in the field of high voltage direct current transmission technology. Attached Figure Description

[0038] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. In the drawings:

[0039] Figure 1 This is a flowchart of the surge arrester resistor element defect monitoring method provided in the embodiments of the present invention;

[0040] Figure 2 This is a schematic diagram of the installation position of the non-uniformity coefficient monitoring CT for the fixed part of the surge arrester of the present invention;

[0041] The labels for the attached figures are as follows:

[0042] 1. Controllable self-recovering energy dissipation device; 2. Fixed element; 3. Non-uniformity coefficient monitoring CT; 4. Control switch; 5. Controlled element; 6. Trigger switch; 7. Bypass switch; 8. Bus CT. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention are within the scope of protection of the present invention.

[0044] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] In some embodiments of the present invention, a method for monitoring defects in the resistor element of a controllable self-recovering energy dissipation device surge arrester is provided. This method is used in a controllable self-recovering energy dissipation device surge arrester, which consists of a fixed part and a controllable part. The fixed part is an energy-absorbing surge arrester, which is frequently subjected to extreme system conditions. After energy absorption, the shunt coefficient of the fixed part, i.e., the energy-absorbing surge arrester, needs to be monitored to determine if a defect has occurred, thereby determining the subsequent operating strategy of the controllable self-recovering energy dissipation device. In this invention, the non-uniform coefficient monitoring CT is set up in groups for the energy-absorbing surge arresters, optimizing the non-uniform coefficient monitoring scheme and reducing the number of non-uniform coefficient monitoring CTs required (only one is configured).

[0046] Correspondingly, in other embodiments of the present invention, a controllable self-recovering energy dissipation device surge arrester resistor element defect monitoring system, equipment, and medium are provided.

[0047] Example 1

[0048] like Figure 1 As shown, this embodiment provides a method for monitoring defects in the resistor element of a controllable self-recovering energy dissipation device surge arrester, including the following steps:

[0049] 1) Determine the maximum number of parallel columns for each group of energy-absorbing surge arresters in the controllable self-recovering energy dissipation device;

[0050] 2) Based on the maximum number of parallel columns for each group of energy-absorbing surge arresters, the actual number of parallel columns and the accuracy requirements of the monitoring CT are obtained to meet the preset economic and technical conditions;

[0051] 3) Based on the determined actual number of parallel columns, the controllable self-recovering energy dissipation device energy-absorbing arresters are grouped, and monitoring CTs are arranged in each group of energy-absorbing arresters to monitor the defects of the resistor elements in the controllable self-recovering energy dissipation device energy-absorbing arresters.

[0052] Furthermore, step 1) above includes the following steps:

[0053] 1.1) Determine the non-uniformity coefficient of a normal single column in the fixed part of the energy-absorbing arrester of the controllable self-recovering energy dissipation device;

[0054] 1.2) Determine the non-uniformity coefficient of the column of the short plate after a short plate appears in the fixed part of the energy-absorbing arrester of the controllable self-recovering energy dissipation device, and take it as the minimum non-uniformity coefficient in the short plate state;

[0055] 1.3) Based on the non-uniformity coefficient of a single column under the sound condition and the minimum non-uniformity coefficient under the short plate condition, the maximum number of parallel columns for each group of energy-absorbing surge arresters is calculated.

[0056] Furthermore, in step 1.1) above, the non-uniformity coefficient of the normal single column of the fixed part of the controllable self-recovering energy dissipation device arrester can be determined according to relevant standards, or it can be determined by the arrester manufacturer through testing.

[0057] Furthermore, in step 1.2 above, the non-uniformity coefficient of the surge arrester of a single column in the fixed part of the controllable self-recovering energy dissipation device when a short plate appears needs to be determined by experimental means based on the number of series plates of the single column in the fixed part of the surge arrester in the actual project.

[0058] Furthermore, in step 1.3) above, the formula for calculating the maximum number of parallel columns n for each group of energy-absorbing surge arresters is:

[0059] β*n<(n-1)*1+α

[0060] Where α and β are the minimum non-uniformity coefficients in the dwarf state and the non-uniformity coefficients of a single column in the healthy state, respectively, and n is an integer.

[0061] Furthermore, step 2) above includes the following steps:

[0062] 2.1) Based on the maximum number of parallel columns for each group of energy-absorbing surge arresters, calculate the accuracy requirement of the monitoring CT corresponding to the current number of parallel columns;

[0063] 2.2) Determine whether the accuracy requirement of the current monitoring CT meets the preset economic and technical conditions. If not, reduce the number of parallel columns of each group of energy-absorbing surge arresters according to the preset step size and return to the previous step until the actual number of parallel columns and the accuracy requirement of the monitoring CT are obtained that meet the preset economic and technical conditions.

[0064] Furthermore, in step 2.1) above, considering the extreme case where the operating current deviation of each group caused by the non-uniformity coefficient can be effectively distinguished from the operating current deviation when a short plate appears in the group, under normal conditions, the non-uniformity coefficient of each group is considered according to the maximum value determined in step 1.1); when a short plate appears, the non-uniformity coefficient of the normal column is considered according to the minimum value, and the non-uniformity coefficient of the column where the short plate is located is taken as the non-uniformity coefficient determined in step 1.2). The value of the maximum number of parallel columns in the group satisfies that, under the above conditions, the minimum operating current of the group where the short plate column is located must be greater than the minimum operating current of the normal group.

[0065] Therefore, the accuracy x of the CT monitoring for the operating current of each group of energy-absorbing surge arresters is calculated by the following formula:

[0066] [(n-1)*1+α](1-x)>β*n(1+x) From the above formula, it can be seen that the accuracy of CT measurement of the group action current is directly proportional to the number of parallel columns. The larger the number of parallel columns in the group, the higher the accuracy requirement of CT measurement. In order to reduce the measurement accuracy, the requirement of the number of parallel columns can be appropriately reduced when determining the number of parallel columns in the group.

[0067] Example 2

[0068] like Figure 2 The diagram shows the installation location of the non-uniformity coefficient monitoring CT for the fixed part of the surge arrester. In the diagram, the controllable self-recovering energy dissipation device includes a fixed element and a controlled element. The fixed element is at a high potential and consists of multiple surge arresters connected in parallel, with one monitoring CT installed in each column. The controlled element is at a low potential and also consists of multiple surge arresters connected in parallel, with one busbar CT installed between the tail of the controlled element and the ground.

[0069] This embodiment discloses a method for monitoring defects in the resistor element of a controllable self-recovering energy dissipation device surge arrester, including the following steps:

[0070] (1) The non-uniformity coefficient β of the normal single column of the fixed element of the controllable self-recovering energy dissipation device is determined according to relevant standards or through experiments. In this embodiment, β is taken as 1.05.

[0071] (2) The non-uniformity coefficient α of a single column of the energy-absorbing arrester with a short plate is determined by experiment. The size of α is related to the number of fixed elements in series. The larger the number of fixed elements in series, the smaller the non-uniformity coefficient after the short plate. In this embodiment, α is taken as 1.6.

[0072] (3) Determine the number of parallel columns n for each group of fixed components. The selection of the number of parallel columns must be able to distinguish between the current difference caused by the non-uniformity coefficient and the current difference caused by the presence of a short plate. For the healthy group, each column of fixed components is considered to have a maximum non-uniformity coefficient of 1.05, and the maximum current limit for the healthy group is 1.05n; for groups with short plates, the non-uniformity coefficient of the healthy columns is considered to be 1, and the non-uniformity coefficient of a column with one short plate is 1.6. Therefore, the following must be satisfied:

[0073] 1.05*n < (n-1)*1 + 1.6

[0074] Since n < 12, the maximum value is 11.

[0075] (4) CT accuracy should be selected according to the following steps;

[0076] 4.1) The single-column current is considered as 1 p.u., and 11 surge arrester elements connected in parallel are called a group, with a non-uniformity coefficient of 1.05 between groups;

[0077] 4.2) After a short segment appears in a surge arrester, the non-uniformity coefficient is 1.6, while the non-uniformity coefficient of the remaining normal surge arresters is the minimum of 1.0pu.

[0078] 4.3) The minimum total current in the group containing the low-profile chip is 12.1 pu;

[0079] 4.4) Considering the non-uniformity coefficient, the maximum current of the normal group is 11.55 pu; calculating the current of each group of surge arresters based on the non-uniformity coefficient is a well-known technique to those skilled in the art, and this invention will not elaborate on it.

[0080] 4.5) To distinguish between the normal group and the stunted group, 11.6*(1-x) > 11.55*(1+x) must be satisfied, thus x < 0.0021.

[0081] 4.6) The CT accuracy should not exceed 0.2%.

[0082] (5) CT Accuracy Verification: This step involves a technical and economic analysis of the accuracy of the selected CT, and adjustments are made to the number of parallel columns in each group based on the analysis results. For example, in this embodiment, if the number of parallel columns in each group is 11, the required CT accuracy is no more than 0.2%, and the CT cost is relatively high. The number of parallel columns in each group can be reduced, for example, to 8 columns per group. Then, step (4) is repeated, and we can obtain 8.6*(1-x)>8.4*(1+x), and the required monitoring CT accuracy is 1%, thus reducing the measurement accuracy of the monitoring CT. Further iteration can yield the technically and economically optimal monitoring CT configuration scheme.

[0083] Example 3

[0084] The above-described embodiment 1 provides a method for monitoring defects in the resistor element of a controllable self-resetting energy dissipation device surge arrester. Correspondingly, this embodiment provides a system for monitoring defects in the resistor element of a controllable self-resetting energy dissipation device surge arrester. The system provided in this embodiment can implement the method for monitoring defects in the resistor element of a controllable self-resetting energy dissipation device surge arrester of embodiment 1. This system can be implemented through software, hardware, or a combination of both. For example, the system may include integrated or separate functional modules or units to execute the corresponding steps in the methods of embodiment 1. Since the system in this embodiment is basically similar to the method embodiment, the description process in this embodiment is relatively simple. For relevant details, please refer to the description of embodiment 1. The system embodiment provided in this embodiment is merely illustrative.

[0085] This embodiment provides a controllable self-recovering energy dissipation device surge arrester resistor element defect monitoring system, comprising:

[0086] The maximum number of parallel columns determination module is used to determine the maximum number of parallel columns for each group of energy-absorbing surge arresters in the controllable self-recovering energy dissipation device.

[0087] The CT accuracy determination module is used to determine the actual number of parallel columns and the monitoring CT accuracy requirements based on the maximum number of parallel columns of each group of energy-absorbing surge arresters, which meet the preset economic and technical conditions.

[0088] The defect monitoring module is used to group the controllable self-recovering energy dissipation device energy-absorbing arresters based on a determined actual number of parallel columns, and to deploy monitoring CTs in each group to monitor the defects of the resistor elements in the controllable self-recovering energy dissipation device energy-absorbing arresters.

[0089] Furthermore, the module for determining the maximum number of parallel columns includes:

[0090] A module for calculating the non-uniformity coefficient of a single column is established to determine the non-uniformity coefficient of a single column in the intact state of the fixed part of the energy-absorbing arrester of the controllable self-recovering energy dissipation device.

[0091] The module for calculating the non-uniformity coefficient of a single column in the state of a dwarf plate is used to determine the non-uniformity coefficient of the single column after a dwarf plate appears in the fixed part of the energy-absorbing arrester of the controllable self-recovering energy dissipation device, and it is used as the minimum non-uniformity coefficient in the state of a dwarf plate.

[0092] The maximum number of parallel columns calculation module is used to calculate the maximum number of parallel columns for each group of energy-absorbing surge arresters based on the non-uniformity coefficient of a single column in the healthy state and the minimum non-uniformity coefficient in the short-plate state.

[0093] Example 4

[0094] This embodiment provides a processing device corresponding to the defect monitoring method for the surge arrester resistor element of the controllable self-recovering energy dissipation device provided in Embodiment 1. The processing device can be a processing device for a client, such as a mobile phone, laptop, tablet computer, desktop computer, etc., to execute the method of Embodiment 1.

[0095] The processing device includes a processor, a memory, a communication interface, and a bus. The processor, memory, and communication interface are connected via the bus to enable communication between them. The memory stores a computer program that can run on the processor. When the processor runs the computer program, it executes the method for monitoring defects in the resistor element of the surge arrester in the controllable self-recovering energy dissipation device provided in Embodiment 1.

[0096] In some embodiments, the memory may be high-speed random access memory (RAM), and may also include non-volatile memory, such as at least one disk storage device.

[0097] In other embodiments, the processor can be a general-purpose processor of various types, such as a central processing unit (CPU) or a digital signal processor (DSP), and is not limited thereto.

[0098] Example 5

[0099] The controllable self-recovering energy dissipation device surge arrester resistor element defect monitoring method of Embodiment 1 can be specifically implemented as a computer program product. The computer program product may include a computer-readable storage medium loaded with computer-readable program instructions for executing the surge arrester resistor element defect monitoring method of Embodiment 1.

[0100] A computer-readable storage medium can be a tangible device that holds and stores instructions for use by an instruction execution device. A computer-readable storage medium can be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any combination thereof.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for monitoring defects in the resistor element of a controllable self-recovering energy dissipation device surge arrester, characterized in that, Includes the following: Determine the maximum number of parallel columns for each group of energy-absorbing surge arresters in a controllable self-recovering energy dissipation device; Based on the maximum number of parallel columns in each group of energy-absorbing surge arresters, the actual number of parallel columns that meet the preset requirements and the accuracy requirements of the monitoring CT are obtained. Based on the determined actual number of parallel columns, the energy-absorbing arresters of the controllable self-recovering energy dissipation device are grouped, and monitoring CTs are arranged in each group to monitor the defects of the resistor elements in each group of energy-absorbing arresters of the controllable self-recovering energy dissipation device. Determining the maximum number of parallel columns for each group of energy-absorbing surge arresters in the controllable self-recovering energy dissipation device includes: Determine the non-uniformity coefficient of a single column in the fixed part of a controllable self-recovering energy dissipation device energy-absorbing surge arrester under sound conditions; After a stunted section appears in the fixed part of the energy-absorbing arrester of the controllable self-recovering energy dissipation device, the non-uniformity coefficient of the single column is taken as the minimum non-uniformity coefficient under the stunted section state. Based on the non-uniformity coefficient of a single column under the healthy state and the minimum non-uniformity coefficient under the short plate state, the maximum number of parallel columns for each group of energy-absorbing surge arresters is calculated.

2. The method for monitoring defects in the resistor element of a controllable self-recovering energy dissipation device surge arrester as described in claim 1, characterized in that, The non-uniformity coefficient of a single column in the intact state and the minimum non-uniformity coefficient in the low-profile state of the fixed part of the controllable self-recovering energy dissipation device and the energy-absorbing arrester were determined by test.

3. The method for monitoring defects in the resistor element of a controllable self-recovering energy dissipation device surge arrester as described in claim 1, characterized in that, The formula for calculating the maximum number of parallel columns for each group of energy-absorbing surge arresters is as follows: β*n<(n-1)*1+α Where α and β are the minimum non-uniformity coefficients in the short-plate state and the non-uniformity coefficients of a single column in the healthy state, respectively; n is the maximum number of parallel columns for each group of energy-absorbing surge arresters, and n is an integer.

4. The method for monitoring defects in the resistor element of a controllable self-recovering energy dissipation device surge arrester as described in claim 1, characterized in that, The method for obtaining the actual number of parallel columns and the monitoring CT accuracy requirements that meet preset conditions, based on the maximum number of parallel columns in each group of energy-absorbing surge arresters, includes: Based on the maximum number of parallel columns for each group of energy-absorbing surge arresters, the accuracy requirement of the monitoring CT corresponding to the current number of parallel columns is calculated. Determine whether the accuracy requirement of the current monitoring CT meets the preset conditions. If not, reduce the number of parallel columns of each group of energy-absorbing surge arresters by the preset step size and return to the previous step until the actual number of parallel columns and the corresponding monitoring CT accuracy requirements are obtained.

5. The method for monitoring defects in the resistor element of a controllable self-recovering energy dissipation device surge arrester as described in claim 4, characterized in that, The accuracy requirement of the monitoring CT corresponding to the current number of parallel columns is calculated based on the maximum number of parallel columns in each group of energy-absorbing surge arresters. The calculation formula is as follows: [(n-1)*1+α](1-x)>β*n(1+x) Where α and β are the minimum non-uniformity coefficients in the dwarf state and the non-uniformity coefficients of a single column in the healthy state, respectively, and n is the maximum number of parallel columns.

6. A controllable self-recovering energy dissipation device surge arrester resistor element defect monitoring system, characterized in that, include: The maximum number of parallel columns determination module is used to determine the maximum number of parallel columns for each group of energy-absorbing surge arresters in a controllable self-recovering energy dissipation device; The CT accuracy determination module is used to obtain the actual number of parallel columns and the monitoring CT accuracy requirements based on the maximum number of parallel columns of each group of energy-absorbing surge arresters, which meet the preset conditions. The defect monitoring module is used to group the energy-absorbing arresters of the controllable self-recovering energy dissipation device based on the determined actual number of parallel columns, and to deploy monitoring CTs in each group to monitor the defects of the resistor elements in each group of energy-absorbing arresters of the controllable self-recovering energy dissipation device. The maximum number of parallel columns determination module includes: A module for calculating the non-uniformity coefficient of a single column is established to determine the non-uniformity coefficient of a single column in the intact state of the fixed part of the energy-absorbing arrester of the controllable self-recovering energy dissipation device. The module for calculating the non-uniformity coefficient of a single column in the state of a dwarf plate is used to determine the non-uniformity coefficient of the single column after a dwarf plate appears in the fixed part of the energy-absorbing arrester of the controllable self-recovering energy dissipation device, and it is used as the minimum non-uniformity coefficient in the state of a dwarf plate. The maximum number of parallel columns calculation module is used to calculate the maximum number of parallel columns for each group of energy-absorbing surge arresters based on the non-uniformity coefficient of a single column in the healthy state and the minimum non-uniformity coefficient in the short-plate state.

7. A processing apparatus, the processing apparatus comprising at least a processor and a memory, the memory storing a computer program, characterized in that, When the processor runs the computer program, it performs the steps of the method for monitoring defects in the resistor element of the surge arrester of any one of claims 1 to 5.

8. A computer storage medium, characterized in that, It stores computer-readable instructions that can be executed by a processor to implement the steps of the method for monitoring defects in the resistor element of a controllable self-recovering energy dissipation device according to any one of claims 1 to 5.

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