Device and method for testing performance of resistor disc of lightning arrester

Abstract

The invention relates to the technical field of lightning arrester performance testing, and discloses a device and method for testing the performance of a resistor disc of a lightning arrester, and the device comprises a plurality of test branches, each test branch comprises a lightning current generation module, one end of the lightning current generation module is used for being connected with the low-voltage end of the resistor disc of the lightning arrester, and the other end of the lightning current generation module is used for being connected with the low-voltage end of the resistor disc of the lightning arrester; the low-voltage end of the energy storage module is connected with the other end of the lightning current generation module; the discharge control module comprises a discharge switch and a driving source, the high-voltage end of the discharge switch is used for being connected with the high-voltage end of the energy storage module, the low-voltage end of the discharge switch is used for being connected with the high-voltage end of a resistor disc of the lightning arrester, a plasma ejector is arranged in the low-voltage end of the discharge switch, and the plasma ejector is driven by the driving source. The control module is used for controlling the discharge switch to apply lightning stroke to the resistor disc of the lightning arrester. Therefore, the performance test of the resistor disc of the lightning arrester under multiple lightning strokes is realized.

Description

Technical Field

[0001] The present application relates to the technical field of lightning arrester performance testing, and in particular to a device and method for testing the performance of a resistor of a lightning arrester. Background Art

[0002] The resistor of the arrester can protect the internal equipment of the power system from the overvoltage impact of lightning strikes. However, with the long-term operation of the arrester, the internal zinc oxide resistor ages and the current carrying capacity of the arrester decreases. At present, the performance evaluation of resistors at home and abroad is mostly based on the change rate of leakage current before and after the experiment under a single lightning strike.

[0003] However, multiple lightning strikes are also a common phenomenon in nature. Multiple lightning strikes are much greater than single lightning strikes in terms of energy, duration and charge, and have a more serious impact on the operation of related electrical equipment and power transmission and distribution lines. The existing technology only evaluates the change rate of leakage current before and after the experiment under single lightning strikes, which cannot fully reflect the performance of resistors under multiple lightning strikes. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a device and method for testing the performance of a resistor of a lightning arrester, so as to solve the technical defect that the prior art only evaluates the rate of change of leakage current before and after the experiment under a single lightning strike, and cannot fully reflect the performance of the resistor under multiple lightning strikes.

[0005] In order to achieve the above-mentioned object, the first aspect of the present application provides a resistor performance test device for a lightning arrester, the device comprising:

[0006] Multiple test branches, each test branch includes:

[0007] A lightning current generating module, one end of which is used to be connected to the low-voltage end of the resistor of the lightning arrester;

[0008] An energy storage module, wherein a low voltage end of the energy storage module is connected to the other end of the lightning current generating module;

[0009] The discharge control module includes a discharge switch and a driving source. The high-voltage end of the discharge switch is used to connect to the high-voltage end of the energy storage module, and the low-voltage end of the discharge switch is used to connect to the high-voltage end of the resistor of the lightning arrester. A plasma jet is built into the low-voltage end of the discharge switch. The plasma jet is driven by the driving source and is used to control the discharge switch to apply lightning strikes to the resistor of the lightning arrester.

[0010] In an embodiment of the present application, each lightning current generating module includes a first waveform branch, a second waveform branch and a wave modulation switch, the first waveform branch includes a first resistor and an inductor connected in sequence, the second waveform branch includes a second resistor, the control end of the wave modulation switch is connected to the low-voltage end of the resistor of the lightning arrester, the first end of the wave modulation switch is connected to the first waveform branch, and the second end of the wave modulation switch is connected to the second waveform branch. The wave modulation switch is used to switch the first waveform branch and the second waveform branch to adjust to the set waveform.

[0011] In the embodiment of the present application, multiple taps are provided between the first resistor, the second resistor and the modulation switch respectively.

[0012] In an embodiment of the present application, when the modulation switch is connected to the first waveform branch, the waveform is set to the first set waveform. When the modulation switch is connected to the second waveform branch, the waveform is set to the second set waveform. The period of the first set waveform is 8 / 20us, and the period of the second set waveform is 4 / 10us.

[0013] In an embodiment of the present application, the energy storage module includes a capacitor.

[0014] In the embodiment of the present application, the lightning arrester further includes a measuring device for measuring the electrical parameters of the resistor.

[0015] The second aspect of the present application provides a method for testing the performance of a resistor of a lightning arrester, using the device for testing the performance of a resistor of the lightning arrester according to the first aspect, the lightning arrester includes a resistor and a wet mist sprayer, the wet mist sprayer is used to treat the resistor with moisture, and the method includes:

[0016] Controlling the wet mist sprayer to perform moisture treatment on the resistor sheet based on the set wet mist spray concentration and the set wet mist spray time;

[0017] Control the low voltage end of the resistor of the arrester to be connected to one end of the lightning current generating module, and control the high voltage end of the resistor of the arrester to be connected to the low voltage end of the discharge switch;

[0018] Control each discharge switch to apply lightning strike to the resistor;

[0019] Measure the electrical parameters of the resistor, including the voltage across the resistor, the current flowing through the resistor, the area of ​​the resistor, the length of the resistor, the duration of the multi-pulse, the peak value of the multi-pulse voltage, the number of multi-pulses and the peak value of the impulse current;

[0020] Based on the voltage across the resistor and the current flowing through the resistor, the maximum pulse power is obtained;

[0021] Based on the electrical parameters, the maximum pulse power and the performance status evaluation formula of the resistor, the performance status evaluation coefficient of the resistor is obtained;

[0022] Based on the performance status evaluation coefficient of the resistor and the appearance of the resistor, determine whether the performance of the resistor is stable.

[0023] In the embodiment of the present application, the performance status evaluation formula includes:

[0024]

[0025] In the formula, G represents the performance status evaluation coefficient of the resistor, S represents the area of ​​the resistor, H represents the length of the resistor, and P V represents the maximum pulse power, t a Indicates the duration of the multi-pulse, U a represents the peak value of the multi-pulse voltage, N represents the number of multi-pulses, I n Indicates the peak value of the inrush current.

[0026] In the embodiment of the present application, determining whether the performance of the resistor is stable based on the performance status evaluation coefficient of the resistor and the appearance of the resistor includes:

[0027] When the performance status evaluation coefficient is less than 1 and the resistor is not damaged or flashed, the performance of the resistor is determined to be stable;

[0028] When the performance status evaluation coefficient is greater than or equal to 1, and / or the resistor is damaged or flashed over, it is determined that the performance of the resistor is unstable.

[0029] In an embodiment of the present application, the method further includes:

[0030] When it is determined that the performance of the resistor is unstable, an alarm message is sent.

[0031] Through the above technical solution, the resistor performance test device of the lightning arrester realizes the moisture treatment and multiple lightning strike treatment of the resistor, and the test device is easy to operate and has high safety and reliability.

[0032] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. In the accompanying drawings:

[0034] Figure 1 A schematic diagram of the structure of a resistor performance test device for a lightning arrester according to an embodiment of the present application is shown;

[0035] Figure 2A schematic diagram of a process flow of a method for testing the performance of a resistor of a lightning arrester according to an embodiment of the present application is schematically shown. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the embodiments of the present application, and are not used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0037] It should be noted that the acquisition, transmission, storage, use, and processing of data in the technical solution of this application are in compliance with the relevant provisions of national laws and regulations. In the embodiments of this application, some existing solutions in the industry such as certain software, components, and models may be mentioned, which should be considered as exemplary. Their purpose is only to illustrate the feasibility of implementing the technical solution of this application, but it does not mean that the applicant has or will necessarily use the solution.

[0038] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0040] In order to better illustrate the resistor performance test device and method of the lightning arrester provided in the embodiment of the present invention, a brief description of the prior art is given. A single lightning strike refers to a situation in which only one major lightning strike occurs during a lightning discharge process. Multiple lightning strikes refer to the situation in which two or more lightning strikes occur again in the same channel after the first lightning flashover and before the electrical insulation strength between the insulations has fully recovered, or the insulation strength of the electrical dielectric gap has recovered after the first lightning strike caused the flashover, but the lightning protection device has not yet returned to its original position and is not fully prepared to be struck by two or more lightning strikes again. The prior art is only based on the evaluation of the rate of change of the leakage current before and after the experiment under a single lightning strike. Multiple lightning strikes are also a common phenomenon in nature, and multiple lightning strikes are much larger than single lightning strikes in energy, duration, and charge. The prior art cannot fully reflect the performance of the resistor under multiple lightning strikes.

[0041] Figure 1 The structure diagram of a resistor performance test device for a lightning arrester according to an embodiment of the present application is schematically shown. Figure 1 As shown, an embodiment of the present application provides a resistor performance test device for a lightning arrester, the device comprising:

[0042] Multiple test branches, each test branch includes:

[0043] A lightning current generating module, one end of which is used to be connected to the low-voltage end of the resistor of the lightning arrester;

[0044] An energy storage module, wherein a low voltage end of the energy storage module is connected to the other end of the lightning current generating module;

[0045] The discharge control module includes a discharge switch and a driving source. The high-voltage end of the discharge switch is used to connect to the high-voltage end of the energy storage module, and the low-voltage end of the discharge switch is used to connect to the high-voltage end of the resistor of the lightning arrester. A plasma jet is built into the low-voltage end of the discharge switch. The plasma jet is driven by the driving source and is used to control the discharge switch to apply lightning strikes to the resistor of the lightning arrester.

[0046] One end of the lightning current generating module is connected to the low voltage end of the resistor of the arrester. During the test, the lightning current generating module can simulate the real lightning current and provide the necessary current input for the performance test of the resistor. The energy storage module is connected to the other end of the lightning current generating module. The energy storage module is responsible for storing the energy required for the test and releasing the energy when necessary to ensure the stability and accuracy of the test. The discharge control module integrates the discharge switch G 1 With plasma jet D 1 , discharge switch G 1 The high-voltage end of the discharge switch G is connected to the high-voltage end of the energy storage module to receive and store sufficient energy. 1The low voltage end of the plasma jet D is connected to the high voltage end of the resistor of the arrester. 1 Embedded in the discharge switch G 1 Inside the low-voltage end of the arrester, when the test is initiated, the discharge switch can respond quickly and use the stored energy to perform an accurate lightning strike test on the arrester's resistor. The arrester's resistor is made of zinc oxide.

[0047] The above technical solution, through the arrester resistor performance test device, realizes the moisture treatment of the resistor and the performance test in a simulated multiple lightning strike environment. The test device not only fully covers the key links of resistor performance evaluation in terms of function, but also makes the operation process simple and fast, greatly improving the test efficiency. At the same time, the device has been comprehensively optimized in terms of safety to ensure the personal safety of operators during the test and the stable operation of the test equipment. In addition, its reliability has been verified many times, and it can maintain stable performance output during long-term and high-intensity testing work, providing strong technical support for the quality control and performance improvement of resistors.

[0048] The resistor performance test device of the lightning arrester provided in the embodiment of the present application comprises five test branches, which can cooperate to apply five lightning strikes to the resistor of the lightning arrester, and the lightning current generation module, the energy storage module and the discharge control module each comprise five, D 1 ~D 5 Represented as plasma jets corresponding to five test branches, G 1 ~G 5 The embodiment of the present application is based on the arrester resistor performance test device to achieve the performance test of the arrester resistor under multiple lightning strikes.

[0049] In one embodiment of the present application, each lightning current generating module includes a first waveform branch, a second waveform branch and a wave modulation switch, the first waveform branch includes a first resistor and an inductor connected in sequence, the second waveform branch includes a second resistor, the control end of the wave modulation switch is connected to the low-voltage end of the resistor of the lightning arrester, the first end of the wave modulation switch is connected to the first waveform branch, the second end of the wave modulation switch is connected to the second waveform branch, and the wave modulation switch is used to switch the first waveform branch and the second waveform branch to adjust to the set waveform.

[0050] Taking the first lightning current generating module as an example, the resistor performance testing device for the lightning arrester provided in the embodiment of the present application is further explained. The first waveform branch includes a first resistor R 1 and inductor L 1 The second waveform branch includes a second resistor R 2 , Modulation switch K 1 The control end is connected to the low voltage end of the resistor of the arrester, and the modulation switch K1 The first end of the first waveform branch is connected to the first waveform branch, and the modulation switch K 1 The second end of the second waveform branch is connected to the modulation switch K 1 Used to switch the first waveform branch and the second waveform branch to adjust to the set waveform. 1 ~K 5 Represents the modulation switches corresponding to the five test branches.

[0051] In one embodiment of the present application, the first resistor R 1 , the second resistor R 2 Respectively with the modulation switch K 1 There are multiple taps in between. The multiple taps are wound by low-inductance metal tapes. The multiple taps allow the resistance value to be adjusted by selecting different connection points, thereby achieving precise control of the voltage.

[0052] In one embodiment of the present application, the modulation switch K 1 When connected to the first waveform branch, the waveform is set to the first set waveform, and the modulation switch K 1 When connected to the second waveform branch, the waveform is set to the second set waveform, the period of the first set waveform is 8 / 20us, and the period of the second set waveform is 4 / 10us. The modulation switch of the embodiment of the present application selects the waveform required for the test by connecting to the first waveform branch or the second waveform branch.

[0053] In one embodiment of the present application, the energy storage module includes a capacitor. 1 ~C 5 Represented as the capacitance corresponding to the five energy storage modules.

[0054] In one embodiment of the present application, the lightning arrester further includes a measurer for measuring electrical parameters of the resistor.

[0055] An embodiment of the present application also provides a method for testing the performance of a resistor of a lightning arrester, using the above-mentioned device for testing the performance of a resistor of a lightning arrester, wherein the lightning arrester includes a resistor and a wet mist sprayer, and the wet mist sprayer is used to subject the resistor to moisture treatment. Figure 2 The following is a schematic diagram of a flow chart of a method for testing the performance of a resistor of a lightning arrester according to an embodiment of the present application. Figure 2 As shown, the embodiment of the present application provides a method for testing the performance of a resistor of a lightning arrester, and the method may include the following steps:

[0056] Step 210: Control the wet mist injector to perform a moisture treatment on the resistor based on the set wet mist injection concentration and the set wet mist injection time;

[0057] Step 220: Control the low voltage end of the resistor of the lightning arrester to be connected to one end of the lightning current generating module, and control the high voltage end of the resistor of the lightning arrester to be connected to the low voltage end of the discharge switch;

[0058] Step 230: Control each discharge switch to apply lightning strike to the resistor;

[0059] Step 240: measuring electrical parameters of the resistor, the electrical parameters including the voltage across the resistor, the current flowing through the resistor, the area of ​​the resistor, the length of the resistor, the duration of the multi-pulse, the peak value of the multi-pulse voltage, the number of multi-pulses and the peak value of the surge current;

[0060] Step 250: obtaining a maximum pulse power based on the voltage across the resistor and the current flowing through the resistor;

[0061] Step 260: Obtaining a performance status evaluation coefficient of the resistor based on the electrical parameters, the maximum pulse power and the performance status evaluation formula of the resistor;

[0062] Step 270: Determine whether the performance of the resistor is stable based on the performance status evaluation coefficient of the resistor and the appearance of the resistor.

[0063] In step 210, the wet mist sprayer performs a moisture treatment on the resistor based on the set wet mist spray concentration M and the set wet mist spray time T. The values ​​of the set wet mist spray concentration M and the set wet mist spray time T can be set according to requirements, and are not specifically limited in this embodiment.

[0064] In step 220, the low voltage end of the resistor of the lightning arrester and the high voltage end of the resistor of the lightning arrester are respectively connected to one end of the lightning current generating module and the low voltage end of the discharge switch, in preparation for controlling each discharge switch to apply lightning strike to the resistor in the subsequent step 230.

[0065] In step 230, five discharge switches are controlled to apply five lightning strikes to the damp-treated resistor, wherein the current value of the five lightning strikes can be selected by the connection mode between the wave modulation switch and the first waveform branch and the second waveform branch.

[0066] In step 240, electrical parameters of the damp-treated resistor are measured when five lightning strikes are applied to the resistor.

[0067] In step 250, the maximum pulse power is the maximum value of the instantaneous power. The instantaneous power is the product of the voltage across the resistor and the current flowing through the resistor. The maximum value of the instantaneous power is the maximum pulse power.

[0068] In step 260, the performance status evaluation formula may include:

[0069]

[0070] In the formula, G represents the performance status evaluation coefficient of the resistor, S represents the area of ​​the resistor, H represents the length of the resistor, and P V represents the maximum pulse power, t a Indicates the duration of the multi-pulse, U a represents the peak value of the multi-pulse voltage, N represents the number of multi-pulses, I n Indicates the peak value of the inrush current.

[0071] It can be understood that the above calculation formula is an example of a performance status evaluation formula. In actual applications, the performance status evaluation formula can also be adjusted as needed, and simple deformation of the formula is also within the protection scope, such as multiplying some parameters by correction coefficients, or adding correction amounts, etc., which are not illustrated one by one here.

[0072] In step 270, whether the performance of the resistor is stable is determined based on the performance status evaluation coefficient of the resistor and the appearance of the resistor.

[0073] The embodiment of the present application is based on the arrester resistor performance test device, which applies five lightning strikes to the arrester resistor after moisture treatment, and measures the electrical parameters of the resistor. According to the electrical parameters, the maximum pulse power and the performance status evaluation formula of the resistor, the performance status evaluation coefficient of the resistor is obtained. Through the performance status evaluation coefficient of the resistor and the appearance of the resistor, it is determined whether the performance of the resistor is stable. Through the above technical solution, the performance of the arrester resistor subjected to five lightning strikes is accurately evaluated, providing a detection basis for further determining the production quality of the resistor.

[0074] In an optional implementation, step 270: determining whether the performance of the resistor is stable based on the performance status evaluation coefficient of the resistor and the appearance of the resistor, includes:

[0075] Step 271: when the performance status evaluation coefficient is less than 1 and the resistor is not damaged or flashed over, determining that the performance of the resistor is stable;

[0076] Step 272: When the performance status evaluation coefficient is greater than or equal to 1, and / or the resistor is damaged or flashed over, it is determined that the performance of the resistor is unstable.

[0077] Among them, when the resistor is not damaged or flashed, the smaller the performance status evaluation coefficient is, the more stable the performance of the resistor is. Under lightning strikes, flashover represents the instantaneous discharge phenomenon that occurs on the surface or edge of the resistor. This discharge phenomenon is usually caused by tiny defects, dirt, moisture or other contaminants on the surface of the resistor, resulting in excessive local electric field strength, which in turn triggers discharge. Flashover will reduce the stability of the resistor and increase the risk of equipment failure.

[0078] In an optional implementation, the method further includes: when it is determined that the performance of the resistor is unstable, sending an alarm message to alert relevant personnel to confirm whether the arrester is unstable and take corresponding treatment measures.

[0079] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0080] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0081] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0082] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0083] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0084] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0085] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0086] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0087] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A resistance sheet performance test device for a lightning arrester, characterized in that: The device comprises: A plurality of test branches, each of the test branches comprising: A lightning current generating module, one end of which is used to be connected to the low-voltage end of the resistor of the arrester; An energy storage module, wherein a low voltage end of the energy storage module is connected to the other end of the lightning current generating module; The discharge control module includes a discharge switch and a driving source, wherein the high-voltage end of the discharge switch is used to be connected to the high-voltage end of the energy storage module, and the low-voltage end of the discharge switch is used to be connected to the high-voltage end of the resistor of the lightning arrester. A plasma jet is built into the low-voltage end of the discharge switch, and the plasma jet is driven by the driving source to control the discharge switch to apply lightning strikes to the resistor of the lightning arrester.

2. The resistor performance test device for a lightning arrester according to claim 1, characterized in that: Each lightning current generating module includes a first waveform branch, a second waveform branch and a wave modulation switch, the first waveform branch includes a first resistor and an inductor connected in sequence, the second waveform branch includes a second resistor, the control end of the wave modulation switch is connected to the low-voltage end of the resistor sheet of the lightning arrester, the first end of the wave modulation switch is connected to the first waveform branch, the second end of the wave modulation switch is connected to the second waveform branch, and the wave modulation switch is used to switch the first waveform branch and the second waveform branch to adjust to the set waveform.

3. The resistor performance testing device for a lightning arrester according to claim 2, characterized in that: Multiple taps are provided between the first resistor, the second resistor and the modulation switch respectively.

4. The resistor performance testing device for a lightning arrester according to claim 2, characterized in that: When the modulation switch is connected to the first waveform branch, the set waveform is the first set waveform. When the modulation switch is connected to the second waveform branch, the set waveform is the second set waveform. The period of the first set waveform is 8 / 20us, and the period of the second set waveform is 4 / 10us.

5. The resistor performance testing device for a lightning arrester according to claim 1, characterized in that: The energy storage module includes a capacitor.

6. The resistor performance testing device for a lightning arrester according to claim 1, characterized in that: The lightning arrester also includes a measurer for measuring the electrical parameters of the resistor.

7. A method for testing the performance of a resistor of a lightning arrester, characterized in that: A resistor performance test device for a lightning arrester according to any one of claims 1 to 6 is used, wherein the lightning arrester comprises a resistor and a wet mist sprayer, wherein the wet mist sprayer is used to perform a moisture treatment on the resistor, and the method comprises: Controlling the wet mist sprayer to perform a moisture treatment on the resistor sheet based on a set wet mist spray concentration and a set wet mist spray time; Control the low voltage end of the resistor of the lightning arrester to be connected to one end of the lightning current generating module, and control the high voltage end of the resistor of the lightning arrester to be connected to the low voltage end of the discharge switch; Controlling each of the discharge switches to apply lightning strikes to the resistor; Measuring electrical parameters of the resistor, wherein the electrical parameters include the voltage across the resistor, the current flowing through the resistor, the area of ​​the resistor, the length of the resistor, the duration of multiple pulses, the peak value of the multiple pulse voltage, the number of multiple pulses, and the peak value of the impulse current; Based on the voltage across the resistor and the current flowing through the resistor, a maximum pulse power is obtained; Based on the electrical parameters, the maximum pulse power and the performance status evaluation formula of the resistor, a performance status evaluation coefficient of the resistor is obtained; Whether the performance of the resistor is stable is determined based on the performance status evaluation coefficient of the resistor and the appearance of the resistor.

8. The method according to claim 7, characterized in that The performance status evaluation formula includes: Wherein, G represents the performance status evaluation coefficient of the resistor, S represents the area of ​​the resistor, H represents the length of the resistor, and P V represents the maximum pulse power, t a Indicates the duration of the multi-pulse, U a represents the peak value of the multi-pulse voltage, N represents the number of multi-pulses, I n Indicates the peak value of the inrush current.

9. The method according to claim 8, characterized in that The determining whether the performance of the resistor is stable based on the performance status evaluation coefficient of the resistor and the appearance of the resistor includes: When the performance status evaluation coefficient is less than 1 and the resistor is not damaged or flashed over, determining that the performance of the resistor is stable; When the performance status evaluation coefficient is greater than or equal to 1, and / or the resistor is damaged or flashed over, it is determined that the performance of the resistor is unstable.

10. The method according to claim 7, characterized in that The method further comprises: When it is determined that the performance of the resistor is unstable, an alarm message is sent.

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