Method and device for testing operation reliability of lightning protection insulator, and storage medium

Abstract

The embodiment of the invention provides a method and device for testing the operation reliability of a lightning protection insulator and a storage medium. The method comprises the following steps: carrying out voltage test on a to-be-tested lightning protection insulator and an insulation section thereof to obtain a voltage test result; performing tensile strength test on the lightning protection insulator based on the preset short-circuit current to obtain a tensile strength test result; applying a preset power frequency voltage to the lightning protection insulator through a power frequency power supply device in a power frequency impact test loop where the lightning protection insulator is located, so as to obtain a power frequency voltage waveform signal; when different phase angles of the power frequency voltage waveform signal are reached, controlling the power frequency impact test loop to output a corresponding lightning wave to the lightning protection insulator so as to obtain an insulation recovery capability test result; according to the voltage test result, the tensile strength test result and the insulation recovery capability test result, the operation reliability of the lightning protection insulator is determined more accurately, the lightning protection insulator can be ensured to operate normally in a network, and lightning stroke faults of a power transmission line and power equipment facilities thereof are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of power equipment testing, and in particular to a method, device, storage medium and electronic equipment for testing the operating reliability of a lightning protection insulator. Background Art

[0002] With the frequent occurrence of extreme weather such as storms around the world, the number of lightning strikes on transmission lines has increased significantly. In order to improve the ability of transmission lines to resist lightning disasters, lightning protection insulators of different voltage levels can be hung on the transmission lines to improve the lightning protection capability of the transmission lines. However, the test of the operating reliability of lightning protection insulators in the prior art is not reasonable enough, resulting in inaccurate evaluation of the operating reliability of lightning protection insulators, which makes the transmission lines on which lightning protection insulators are hung and the power equipment and facilities on the transmission lines extremely vulnerable to lightning strikes. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a method, device, storage medium and electronic device for testing the operating reliability of lightning protection insulators, so as to solve the problem of inaccurate evaluation of the operating reliability of lightning protection insulators in the prior art.

[0004] In order to achieve the above-mentioned object, the first aspect of the present application provides a method for testing the operating reliability of a lightning protection insulator, comprising:

[0005] Performing voltage test on the lightning protection insulator to be tested and the insulating section of the lightning protection insulator to obtain the voltage test result of the lightning protection insulator;

[0006] Performing a tensile strength test on the lightning protection insulator based on a preset short-circuit current to obtain a tensile strength test result of the lightning protection insulator under the preset short-circuit current;

[0007] Applying a preset power frequency voltage to the lightning protection insulator through a power frequency power supply device in a power frequency impulse test circuit where the lightning protection insulator is located, so as to obtain a power frequency voltage waveform signal;

[0008] When reaching different phase angles of the power frequency voltage waveform signal, the power frequency impulse test circuit is controlled to output the corresponding lightning wave to the lightning protection insulator to obtain the insulation recovery capacity test result of the lightning protection insulator;

[0009] The operational reliability of the lightning protection insulator is determined based on the voltage test results, tensile strength test results and insulation recovery capacity test results.

[0010] In an embodiment of the present application, voltage tests are performed on the lightning protection insulator to be tested and the insulating segment of the lightning protection insulator to obtain the voltage test results of the lightning protection insulator, including: applying a first preset power frequency voltage for a preset time to the lightning protection insulator under rain conditions, and applying a second preset power frequency voltage for a preset time to the insulating segment of the lightning protection insulator under rain conditions; applying a first operating impulse overvoltage and a second operating impulse overvoltage for a preset number of times to the lightning protection insulator and the insulating segment after applying the corresponding preset power frequency voltage under rain conditions according to the voltage level of the lightning protection insulator; judging whether insulation flashover occurs in the lightning protection insulator and the insulating segment after applying the preset number of operating impulse overvoltages; judging whether the zinc oxide resistor included in the arrester segment of the lightning protection insulator is damaged after applying the preset number of operating impulse overvoltages; and determining the voltage test results according to the test results of whether insulation flashover occurs and the test results of whether the zinc oxide resistor is damaged.

[0011] In an embodiment of the present application, determining the voltage test result based on the test results of whether insulation flashover occurs and the test results of whether the zinc oxide resistor is damaged includes: when no insulation flashover occurs in the lightning protection insulator and the insulation section after a preset number of operating impulse overvoltages are applied, and the zinc oxide resistor included in the lightning arrester section is not damaged, determining that the voltage test result is qualified.

[0012] In an embodiment of the present application, a tensile strength test is performed on a lightning protection insulator based on a preset short-circuit current to obtain a tensile strength test result of the lightning protection insulator under a preset short-circuit current, including: applying a preset voltage to the lightning arrester section of the lightning protection insulator to damage the zinc oxide resistor in the lightning arrester section of the lightning protection insulator, so that the lightning protection insulator is in a first state to be tested; applying a preset short-circuit current to the lightning arrester section of the lightning protection insulator in the first state to be tested to cause the zinc oxide resistor to burst, so that the lightning protection insulator is in a second state to be tested; performing a tensile strength test on the lightning protection insulator in the second state to be tested to obtain a tensile strength test result of the lightning protection insulator under a preset short-circuit current.

[0013] In an embodiment of the present application, a tensile strength test is performed on a lightning protection insulator in a second state to be tested to obtain a tensile strength test result of the lightning protection insulator under a preset short-circuit current, including: applying the rated load of the lightning protection insulator to the lightning protection insulator in the second state to be tested; judging whether the lightning protection insulator is damaged within a preset time after the rated load is applied; if the lightning protection insulator is not damaged within the preset time after the rated load is applied, performing a tensile damage test on the lightning protection insulator to obtain a tensile strength test curve of the lightning protection insulator; determining the maximum tensile strength that the lightning protection insulator can withstand during the tensile damage test according to the tensile strength test curve; and determining the tensile strength test result according to the maximum tensile strength.

[0014] In an embodiment of the present application, determining the tensile strength test result according to the maximum tensile strength includes: when the maximum tensile strength is greater than or equal to a preset multiple of the rated load, determining that the tensile strength test result is qualified.

[0015] In an embodiment of the present application, a power frequency impulse test circuit includes a power frequency power supply device, an impulse voltage generator, an isolation spherical gap, and a series isolation protection lightning arrester, the series isolation protection lightning arrester is respectively connected in series with the impulse voltage generator and the isolation spherical gap, the lightning protection insulator is connected in series with the power frequency power supply device, and the lightning protection insulator is connected in parallel with the isolation spherical gap; when reaching different phase angles of the power frequency voltage waveform signal, the power frequency impulse test circuit is controlled to output the corresponding lightning wave to the lightning protection insulator to obtain the insulation recovery ability test result of the lightning protection insulator, including: when reaching different phase angles of the power frequency voltage waveform signal, the impulse voltage generator is controlled to discharge to generate the corresponding lightning wave; the corresponding lightning wave generated by the discharge is output to the lightning protection insulator through the series isolation protection lightning arrester and the isolation spherical gap; it is judged whether external insulation flashover occurs after the lightning protection insulator and the insulation section are impacted by the corresponding lightning wave, and it is judged whether the gap of the insulation section of the lightning protection insulator cuts off the power frequency continuous current within the preset power frequency period; the insulation recovery ability test result is determined according to the test result of whether external insulation flashover occurs and the test result of whether the power frequency continuous current is cut off.

[0016] In an embodiment of the present application, the insulation recovery capacity test result is determined based on the test result of whether external insulation flashover occurs and the test result of whether the power frequency continuous current is cut off, including: when external insulation flashover does not occur in the lightning protection insulator and the insulation segment under all lightning wave impacts, and the gap of the insulation segment cuts off the power frequency continuous current within a preset power frequency cycle, the insulation recovery capacity test result is determined to be qualified.

[0017] A second aspect of the present application provides a device for testing the operational reliability of a lightning protection insulator, comprising:

[0018] A voltage test module is used to perform voltage test on the lightning protection insulator to be tested and the insulating section of the lightning protection insulator to obtain the voltage test result of the lightning protection insulator;

[0019] A tensile strength test module is used to perform a tensile strength test on the lightning protection insulator based on a preset short-circuit current to obtain a tensile strength test result of the lightning protection insulator under the preset short-circuit current;

[0020] A power frequency voltage application module is used to apply a preset power frequency voltage to the lightning protection insulator through a power frequency power supply device in a power frequency impulse test circuit where the lightning protection insulator is located, so as to obtain a power frequency voltage waveform signal;

[0021] The insulation recovery capacity test module is used to control the power frequency impulse test circuit to output the corresponding lightning wave to the lightning protection insulator when reaching different phase angles of the power frequency voltage waveform signal, so as to obtain the insulation recovery capacity test result of the lightning protection insulator;

[0022] The operation reliability determination module is used to determine the operation reliability of the lightning protection insulator according to the voltage test results, the tensile strength test results and the insulation recovery capacity test results.

[0023] In an embodiment of the present application, a voltage testing module is used to perform a voltage test on a lightning protection insulator to be tested and an insulating segment of the lightning protection insulator to obtain a voltage test result of the lightning protection insulator, including: applying a first preset power frequency voltage for a preset time to the lightning protection insulator under rain conditions, and applying a second preset power frequency voltage for a preset time to the insulating segment of the lightning protection insulator under rain conditions; applying a first operating impulse overvoltage and a second operating impulse overvoltage for a preset number of times to the lightning protection insulator and the insulating segment after applying the corresponding preset power frequency voltage under rain conditions according to the voltage level of the lightning protection insulator; judging whether insulation flashover occurs in the lightning protection insulator and the insulating segment after applying the preset number of operating impulse overvoltages; judging whether the zinc oxide resistor included in the lightning arrester segment of the lightning protection insulator is damaged after applying the preset number of operating impulse overvoltages; and determining the voltage test result according to the test results of whether insulation flashover occurs and the test results of whether the zinc oxide resistor is damaged.

[0024] In an embodiment of the present application, a voltage test module is used to determine a voltage test result based on a test result of whether insulation flashover occurs and a test result of whether the zinc oxide resistor is damaged, including: when no insulation flashover occurs in the lightning protection insulator and the insulation section after a preset number of operating impulse overvoltages are applied, and the zinc oxide resistor included in the lightning arrester section is not damaged, the voltage test result is determined to be qualified.

[0025] In an embodiment of the present application, a tensile strength testing module is used to perform a tensile strength test on a lightning protection insulator based on a preset short-circuit current to obtain a tensile strength test result of the lightning protection insulator under a preset short-circuit current, including: applying a preset voltage to the lightning arrester section of the lightning protection insulator to damage the zinc oxide resistor in the lightning arrester section of the lightning protection insulator, so that the lightning protection insulator is in a first state to be tested; applying a preset short-circuit current to the lightning arrester section of the lightning protection insulator in the first state to be tested to cause the zinc oxide resistor to burst, so that the lightning protection insulator is in a second state to be tested; performing a tensile strength test on the lightning protection insulator in the second state to be tested to obtain a tensile strength test result of the lightning protection insulator under a preset short-circuit current.

[0026] In an embodiment of the present application, a tensile strength testing module is used to perform a tensile strength test on a lightning protection insulator in a second state to be tested to obtain a tensile strength test result of the lightning protection insulator under a preset short-circuit current, including: applying the rated load of the lightning protection insulator to the lightning protection insulator in the second state to be tested; determining whether the lightning protection insulator is damaged within a preset time after the rated load is applied; if the lightning protection insulator is not damaged within the preset time after the rated load is applied, performing a tensile damage test on the lightning protection insulator to obtain a tensile strength test curve of the lightning protection insulator; determining the maximum tensile strength that the lightning protection insulator can withstand during the tensile damage test according to the tensile strength test curve; and determining the tensile strength test result according to the maximum tensile strength.

[0027] In an embodiment of the present application, the tensile strength testing module is used to determine the tensile strength test result according to the maximum tensile strength, including: when the maximum tensile strength is greater than or equal to a preset multiple of the rated load, determining that the tensile strength test result is qualified.

[0028] In an embodiment of the present application, a power frequency impulse test circuit includes a power frequency power supply device, an impulse voltage generator, an isolation spherical gap, and a series isolation protection lightning arrester, the series isolation protection lightning arrester is respectively connected in series with the impulse voltage generator and the isolation spherical gap, the lightning protection insulator is connected in series with the power frequency power supply device, and the lightning protection insulator is connected in parallel with the isolation spherical gap; an insulation recovery capacity test module is used to control the power frequency impulse test circuit to output a corresponding lightning wave to the lightning protection insulator when reaching different phase angles of the power frequency voltage waveform signal to obtain an insulation recovery capacity test result of the lightning protection insulator, including: when reaching different phase angles of the power frequency voltage waveform signal, controlling the impulse voltage generator to discharge to generate a corresponding lightning wave; outputting the corresponding lightning wave generated by the discharge to the lightning protection insulator through the series isolation protection lightning arrester and the isolation spherical gap; judging whether external insulation flashover occurs after the lightning protection insulator and the insulation section are impacted by the corresponding lightning wave, and judging whether the gap of the insulation section of the lightning protection insulator cuts off the power frequency continuous current within a preset power frequency period; determining the insulation recovery capacity test result according to the test result of whether external insulation flashover occurs and the test result of whether the power frequency continuous current is cut off.

[0029] In an embodiment of the present application, the insulation recovery capacity test module is used to determine the insulation recovery capacity test result according to the test result of whether external insulation flashover occurs and the test result of whether the power frequency continuous current is cut off, including: when external insulation flashover does not occur in the lightning protection insulator and the insulation segment under all lightning wave impacts, and the gap of the insulation segment cuts off the power frequency continuous current within a preset power frequency cycle, the insulation recovery capacity test result is determined to be qualified.

[0030] A third aspect of the present application provides an electronic device, including:

[0031] a memory configured to store instructions;

[0032] The processor is configured to call the instructions from the memory and implement the above-mentioned method for testing the operational reliability of lightning protection insulators when executing the instructions.

[0033] A fourth aspect of the present application provides a machine-readable storage medium having instructions stored thereon, which, when executed by a processor, configures the processor to execute the above-mentioned method for testing the operational reliability of lightning protection insulators.

[0034] Through the above technical scheme, voltage test and tensile strength test are carried out on the lightning protection insulator to be tested to ensure that the lightning protection insulator can operate normally after being hung on the grid, and insulation recovery capacity test is carried out on the lightning protection insulator to be tested to simulate the lightning strike condition when the lightning protection insulator is struck by lightning. Therefore, the operating reliability of the lightning protection insulator can be more accurately evaluated according to the voltage test results, tensile strength test results and insulation recovery capacity test results, ensuring that the lightning protection insulator can operate normally after being hung on the grid, and reducing lightning faults of the transmission lines to which the lightning protection insulator is hung and the power equipment and facilities on the transmission lines.

[0035] 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

[0036] 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:

[0037] Figure 1 A schematic diagram of a process of testing the operating reliability of a lightning protection insulator according to an embodiment of the present application is shown;

[0038] Figure 2 A schematic diagram of a power frequency impact test circuit according to an embodiment of the present application is schematically shown;

[0039] Figure 3 A schematic diagram of a process of testing the operating reliability of a lightning protection insulator according to another embodiment of the present application is shown;

[0040] Figure 4 The internal structure diagram of a computer device according to an embodiment of the present application is schematically shown. DETAILED DESCRIPTION

[0041] 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.

[0042] It should be noted that 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.

[0043] Figure 1 The flowchart of the method for testing the operating reliability of lightning protection insulators according to an embodiment of the present application is schematically shown. Figure 1 As shown, in one embodiment of the present application, a method for testing the operating reliability of a lightning protection insulator is provided, comprising the following steps:

[0044] Step 101: performing voltage test on the lightning protection insulator to be tested and the insulating section of the lightning protection insulator to obtain the voltage test result of the lightning protection insulator.

[0045] When testing the operational reliability of the lightning protection insulator, the processor can perform a voltage test on the lightning protection insulator to be tested and the insulating section of the lightning protection insulator to obtain the voltage test result of the lightning protection insulator. The voltage test can be used to reflect whether the lightning protection insulator has the ability to operate normally.

[0046] In an embodiment of the present application, voltage tests are performed on the lightning protection insulator to be tested and the insulating segment of the lightning protection insulator to obtain the voltage test results of the lightning protection insulator, including: applying a first preset power frequency voltage for a preset time to the lightning protection insulator under rain conditions, and applying a second preset power frequency voltage for a preset time to the insulating segment of the lightning protection insulator under rain conditions; applying a first operating impulse overvoltage and a second operating impulse overvoltage for a preset number of times to the lightning protection insulator and the insulating segment after applying the corresponding preset power frequency voltage under rain conditions according to the voltage level of the lightning protection insulator; judging whether insulation flashover occurs in the lightning protection insulator and the insulating segment after applying the preset number of operating impulse overvoltages; judging whether the zinc oxide resistor included in the arrester segment of the lightning protection insulator is damaged after applying the preset number of operating impulse overvoltages; and determining the voltage test results according to the test results of whether insulation flashover occurs and the test results of whether the zinc oxide resistor is damaged.

[0047] When voltage testing is performed on the lightning protection insulator and the insulating section of the lightning protection insulator to be tested, the first preset power frequency voltage and the second preset power frequency voltage of the preset duration can be applied to the insulating section of the lightning protection insulator and the lightning protection insulator under rain conditions. The preset duration refers to the duration of continuous application of the power frequency voltage corresponding to the preset power frequency voltage. The rain condition refers to the direction of rain water moving from top to bottom at an angle of 45° to the surface of the lightning protection insulator. The horizontal and vertical rainfall can be set to 1.0~2.0mm / min, the resistivity of rain water at 20℃ can be set to 100±15Ω·m, and the rain environment temperature can be set to any value between 5 and 40℃. The preset total duration of applying the power frequency voltage can be set according to the actual situation, usually set to 15~30min. For example, for a lightning insulator with a voltage level of 500kV, the preset total duration and preset duration of applying the power frequency voltage can be set to 20 minutes and 1 minute respectively. The power frequency voltage is applied after 5 to 10 minutes of rain. When the power frequency voltage reaches the preset power frequency voltage, the preset power frequency voltage is applied for 1 minute and then reduced to zero. The entire duration is controlled within the preset total duration of 20 minutes. The preset power frequency voltage refers to the effective value of the power frequency voltage. The voltage levels of lightning insulators are different, and the effective values ​​of the power frequency voltage applied to lightning insulators and their insulating segments under rain conditions are also different. The first preset power frequency voltage refers to the power frequency voltage applied to lightning insulators under rain conditions, and the second preset power frequency voltage refers to the power frequency voltage applied to the insulating segment of the lightning insulator under rain conditions.

[0048] For example, for a whole lightning protection insulator with a voltage level of 10kV, 35kV, 110kV, 220kV, 330kV, 500kV, and 750kV, the first preset power frequency voltage applied to it under rain conditions can be 26kV, 70kV, 170kV, 340kV, 460kV, 510kV, and 647kV respectively, and the second preset power frequency voltage applied to its insulating section under rain conditions can be 16kV, 49kV, 95kV, 189kV, 293kV, 445kV, and 508kV respectively.

[0049] According to the voltage level of the lightning protection insulator, the first operating impulse overvoltage and the second operating impulse overvoltage can be applied to the lightning protection insulator and the insulating section after the corresponding preset power frequency voltage is applied under rain conditions. The preset number of times can be set according to actual needs. For example, for a 330kV lightning protection insulator, the corresponding preset number of times can be set to 15 times. The voltage level of the lightning protection insulator is different, and the operating impulse overvoltage applied to the lightning protection insulator and its insulating section under rain conditions is also different. For example, for a whole lightning protection insulator with a voltage level of 330kV, 500kV, and 750kV, the preset operating impulse overvoltage applied to it under rain conditions can be 647kV, 898kV, and 1176kV, respectively.

[0050] The processor can determine whether insulation flashover occurs in the lightning protection insulator and the insulating section after a preset number of operating impulse overvoltages are applied, so as to obtain a test result of whether insulation flashover occurs. Insulation flashover refers to the phenomenon of gas discharge occurring between the metal electrodes at both ends of the lightning protection insulator and the insulating section along the surface of the outer insulating material under the action of the electric field. The processor can determine whether the zinc oxide resistor included in the lightning arrester section of the lightning protection insulator is damaged after a preset number of operating impulse overvoltages are applied, so as to obtain a test result of whether the zinc oxide resistor is damaged. The processor can determine the voltage test result based on the test result of whether insulation flashover occurs and the test result of whether the zinc oxide resistor is damaged.

[0051] In an embodiment of the present application, determining the voltage test result based on the test results of whether insulation flashover occurs and the test results of whether the zinc oxide resistor is damaged includes: when no insulation flashover occurs in the lightning protection insulator and the insulation section after a preset number of operating impulse overvoltages are applied, and the zinc oxide resistor included in the lightning arrester section is not damaged, determining that the voltage test result is qualified.

[0052] If insulation flashover does not occur in the lightning protection insulator and the insulation segment after applying the preset number of operating impulse overvoltages, and the zinc oxide resistor included in the lightning arrester segment is not damaged, the processor can determine that the voltage test result of the lightning protection insulator is qualified. If insulation flashover occurs in the lightning protection insulator and / or the insulation segment after applying the preset number of operating impulse overvoltages, and / or the zinc oxide resistor included in the lightning arrester segment is damaged, the processor can determine that the voltage test result of the lightning protection insulator is unqualified.

[0053] The above scheme performs voltage tests on the lightning protection insulator to be tested and the insulating sections of the lightning protection insulator. If no insulation flashover occurs in the lightning protection insulator and the insulating sections after the voltage test, and the zinc oxide resistor included in the lightning arrester section is not damaged, it means that the lightning protection insulator can operate normally. Even if an internal fault occurs during the operation of the lightning protection insulator, the transmission line where the lightning protection insulator is located will not be shut down due to a fault in the insulating section, and it can ensure that the lightning protection insulator can withstand the maximum operating impulse overvoltage that may occur on the transmission line where it is located.

[0054] Step 102: Performing a tensile strength test on the lightning protection insulator based on a preset short-circuit current to obtain a tensile strength test result of the lightning protection insulator under the preset short-circuit current.

[0055] The processor can perform a tensile strength test on the lightning protection insulator based on a preset short-circuit current to obtain a tensile strength test result of the lightning protection insulator under the preset short-circuit current. The tensile strength test can be used to reflect the ability of the lightning protection insulator to suspend the conductor.

[0056] In an embodiment of the present application, a tensile strength test is performed on a lightning protection insulator based on a preset short-circuit current to obtain a tensile strength test result of the lightning protection insulator under a preset short-circuit current, including: applying a preset voltage to the lightning arrester section of the lightning protection insulator to damage the zinc oxide resistor in the lightning arrester section of the lightning protection insulator, so that the lightning protection insulator is in a first state to be tested; applying a preset short-circuit current to the lightning arrester section of the lightning protection insulator in the first state to be tested to cause the zinc oxide resistor to burst, so that the lightning protection insulator is in a second state to be tested; performing a tensile strength test on the lightning protection insulator in the second state to be tested to obtain a tensile strength test result of the lightning protection insulator under a preset short-circuit current.

[0057] When the tensile strength test is performed on the lightning protection insulator, a preset voltage may be applied to the lightning arrester section of the lightning protection insulator to damage the zinc oxide resistor in the lightning arrester section of the lightning protection insulator, so that the lightning protection insulator is in the first state to be tested. The preset voltage may be set based on actual needs, but its value needs to be sufficient to damage the zinc oxide resistor. The first state to be tested refers to the state when the zinc oxide resistor included in the lightning protection insulator is damaged.

[0058] When the lightning protection insulator is in the first state to be tested, a preset short-circuit current can be applied to the arrester section of the lightning protection insulator in the first state to be tested to cause the zinc oxide resistor to burst, so that the lightning protection insulator is in the second state to be tested. The preset short-circuit current can be set based on actual needs, but its value needs to be sufficient to cause the zinc oxide resistor to burst. The second state to be tested refers to the state when the zinc oxide resistor included in the lightning protection insulator bursts.

[0059] When the lightning protection insulator is in the second state to be tested, the short-circuit high current test has been completed for the lightning protection insulator, and a tensile strength test can be performed on the lightning protection insulator in the second state to be tested to obtain the tensile strength test result of the lightning protection insulator under the preset short-circuit current.

[0060] In an embodiment of the present application, a tensile strength test is performed on a lightning protection insulator in a second state to be tested to obtain a tensile strength test result of the lightning protection insulator under a preset short-circuit current, including: applying the rated load of the lightning protection insulator to the lightning protection insulator in the second state to be tested; judging whether the lightning protection insulator is damaged within a preset time after the rated load is applied; if the lightning protection insulator is not damaged within the preset time after the rated load is applied, performing a tensile damage test on the lightning protection insulator to obtain a tensile strength test curve of the lightning protection insulator; determining the maximum tensile strength that the lightning protection insulator can withstand during the tensile damage test according to the tensile strength test curve; and determining the tensile strength test result according to the maximum tensile strength.

[0061] When the tensile strength test is performed on the lightning protection insulator in the second state to be tested, the lightning protection insulator in the second state to be tested can be placed on a tensile testing machine. The tensile testing machine can be determined based on the voltage level of the lightning protection insulator. For example, a horizontal tensile testing machine can be used for 500kV lightning protection insulators, and a vertical tensile testing machine can be used for 35kV and below lightning protection insulators. Afterwards, the tensile testing machine can be controlled to apply the rated load of the lightning protection insulator to the lightning protection insulator in the second state to be tested, so as to perform a tensile strength test on the lightning protection insulator under the rated load. The rated load refers to the product tensile strength design value of the lightning protection insulator, that is, the nominal rated load of the lightning protection insulator. After waiting for a preset time, it can be determined whether the lightning protection insulator after the rated load is applied is damaged within the preset time.

[0062] If the lightning protection insulator is damaged within the preset time after the rated load is applied, the tensile strength test result of the lightning protection insulator can be determined to be unqualified. If the lightning protection insulator is not damaged within the preset time after the rated load is applied, a tensile damage test is performed on the lightning protection insulator to obtain the tensile strength test curve of the lightning protection insulator. Among them, the preset time refers to the tensile holding time of the lightning protection insulator, which can be set according to demand. The tensile strength test curve is a relationship curve between tensile strength and time based on each time point and the load applied to the lightning protection insulator.

[0063] The processor can determine the maximum tensile strength that the lightning protection insulator can withstand during the tensile failure test according to the tensile strength test curve. The processor can determine the tensile strength test result according to the maximum tensile strength. Among them, the tensile strength test result includes qualified and unqualified. Specifically, if the maximum tensile strength and the rated load both satisfy a certain relationship, the tensile strength test result for the lightning protection insulator is qualified. If the maximum tensile strength and the rated load do not satisfy a certain relationship, the tensile strength test result for the lightning protection insulator is unqualified.

[0064] In an embodiment of the present application, determining the tensile strength test result according to the maximum tensile strength includes: when the maximum tensile strength is greater than or equal to a preset multiple of the rated load, determining that the tensile strength test result is qualified.

[0065] When the maximum tensile strength is greater than or equal to a preset multiple of the rated load, the processor can determine that the tensile strength test result is qualified. Among them, the preset multiple can be set based on demand, for example, the preset multiple can be set to 1.2. If the tensile strength test result is qualified, it means that even in the extreme case of zinc oxide resistor bursting, the lightning protection insulator can still suspend the wire. The lightning protection insulator has a certain ability to suspend the wire, and will not cause the transmission line where the lightning protection insulator is located to fail and stop operating, nor will there be a risk of string loss in the transmission line where the lightning protection insulator is located.

[0066] In the case where the maximum tensile strength is less than a preset multiple of the rated load, the processor can determine that the tensile strength test result is unqualified. If the tensile strength test result is unqualified, the lightning protection insulator may not be able to suspend the conductor when it is hung on the transmission line, resulting in a transmission line failure and shutdown, and more seriously, there may be a risk of string loss on the transmission line.

[0067] Step 103: applying a preset power frequency voltage to the lightning protection insulator through a power frequency power supply device in a power frequency impulse test circuit where the lightning protection insulator is located, so as to obtain a power frequency voltage waveform signal.

[0068] The processor can apply a preset power frequency voltage to the lightning protection insulator through the power frequency power supply device in the power frequency impulse test circuit where the lightning protection insulator is located to obtain a power frequency voltage waveform signal. The preset power frequency voltage refers to the effective value of the power frequency voltage. The voltage level of the lightning protection insulator is different, and the preset power frequency voltage applied to the lightning protection insulator is also different. For example, for a whole lightning protection insulator with a voltage level of 10kV, 35kV, 110kV, 220kV, 330kV, 500kV, and 750kV, the preset power frequency voltage applied under rain conditions can be 26kV, 70kV, 170kV, 340kV, 460kV, 510kV, and 647kV, respectively.

[0069] Step 104: When reaching different phase angles of the power frequency voltage waveform signal, control the power frequency impulse test circuit to output corresponding lightning waves to the lightning protection insulator to obtain the insulation recovery capacity test result of the lightning protection insulator.

[0070] The power frequency voltage is applied to the lightning protection insulator through the power frequency power supply device. At different phase angles of the power frequency voltage waveform signal, the processor can control the power frequency impulse test circuit to output the corresponding lightning wave to the lightning protection insulator to obtain the insulation recovery capacity test result of the lightning protection insulator. Among them, the phase angle can be set in advance, for example, the phase angle can be set to 0°, 30°, 45°, 60°, 90°. The insulation recovery capacity test results can be used to reflect the lightning protection characteristics of the lightning protection insulator and its operation safety.

[0071] In an embodiment of the present application, a power frequency impulse test circuit includes a power frequency power supply device, an impulse voltage generator, an isolation spherical gap, and a series isolation protection lightning arrester, the series isolation protection lightning arrester is respectively connected in series with the impulse voltage generator and the isolation spherical gap, the lightning protection insulator is connected in series with the power frequency power supply device, and the lightning protection insulator is connected in parallel with the isolation spherical gap; when reaching different phase angles of the power frequency voltage waveform signal, the power frequency impulse test circuit is controlled to output the corresponding lightning wave to the lightning protection insulator to obtain the insulation recovery ability test result of the lightning protection insulator, including: when reaching different phase angles of the power frequency voltage waveform signal, the impulse voltage generator is controlled to discharge to generate the corresponding lightning wave; the corresponding lightning wave generated by the discharge is output to the lightning protection insulator through the series isolation protection lightning arrester and the isolation spherical gap; it is judged whether external insulation flashover occurs after the lightning protection insulator and the insulation section are impacted by the corresponding lightning wave, and it is judged whether the gap of the insulation section of the lightning protection insulator cuts off the power frequency continuous current within the preset power frequency period; the insulation recovery ability test result is determined according to the test result of whether external insulation flashover occurs and the test result of whether the power frequency continuous current is cut off.

[0072] like Figure 2As shown, a schematic diagram of a power frequency impulse test circuit is provided. The power frequency impulse test circuit includes an impulse voltage generator, an isolation spherical gap S2, and a series isolation protection lightning arrester RT1. The series isolation protection lightning arrester RT1 is connected in series with the impulse voltage generator and the isolation spherical gap S2 respectively. The lightning protection insulator (the test piece shown in the figure) is connected in series with the power frequency power supply device (the power frequency power supply shown in the figure), and the lightning protection insulator is connected in parallel with the isolation spherical gap S2. The power frequency impulse test circuit may also include a power frequency protection spherical gap S1, a wave modulation capacitor C1, a protection inductor L, a protection resistor R, and a parallel isolation protection lightning arrester RT2.

[0073] Among them, the power frequency impulse test circuit includes a power frequency power supply device (the power frequency power supply shown in the figure), an impulse voltage generator, an isolation spherical gap S2 and a series isolation protection lightning arrester RT1. The series isolation protection lightning arrester RT1, the impulse voltage generator and the isolation spherical gap S2 are connected in series to form a sub-circuit 1, the lightning protection insulator (the test piece shown in the figure) is set as sub-circuit 2, and the power frequency power supply device (the power frequency power supply shown in the figure) is set as sub-circuit 3. Sub-circuit 1, sub-circuit 2 and sub-circuit 3 are connected in parallel to form a power frequency impulse test circuit for the lightning protection insulator.

[0074] The power frequency voltage generated by the power frequency power supply device is applied to the lightning protection insulator. At different phase angles of the power frequency voltage waveform signal, the impulse voltage generator is controlled to output the corresponding lightning wave, which breaks through the isolation spherical gap and is applied to the lightning protection insulator through the series isolation protection arrester. The corresponding lightning wave generated by the impulse voltage generator breaks through the isolation spherical gap and is output to the lightning protection insulator through the series isolation protection arrester.

[0075] Afterwards, it can be determined whether external insulation flashover occurs after the lightning protection insulator is impacted by the corresponding lightning wave, so as to obtain a test result of whether external insulation flashover occurs, and it can be determined whether the gap of the insulating section of the lightning protection insulator cuts off the power frequency continuous current within the preset power frequency cycle, so as to obtain a test result of whether the power frequency continuous current is cut off. The processor can determine the insulation recovery capacity test result according to the test result of whether external insulation flashover occurs and the test result of whether the power frequency continuous current is cut off.

[0076] In an embodiment of the present application, the insulation recovery capacity test result is determined based on the test result of whether external insulation flashover occurs and the test result of whether the power frequency continuous current is cut off, including: when external insulation flashover does not occur in the lightning protection insulator and the insulation segment under all lightning wave impacts, and the gap of the insulation segment cuts off the power frequency continuous current within a preset power frequency cycle, the insulation recovery capacity test result is determined to be qualified.

[0077] The discharge of the lightning protection insulator under all lightning wave impacts must only occur between the gaps of the insulation sections, and the lightning protection insulator and the insulation section do not have external insulation flashover under all lightning wave impacts, and the gap of the insulation section cuts off the power frequency continuous current within the preset power frequency cycle. The processor can determine that the insulation recovery capacity test result is qualified. Among them, the preset power frequency cycle can be half a power frequency cycle, that is, half a cycle of the power frequency voltage waveform signal.

[0078] The gap in the insulating section cuts off the power frequency follow-through within the preset power frequency cycle, which means that the gap arc is extinguished and does not reignite after the lightning wave disappears, and the gap insulation can be quickly restored. Therefore, the lightning protection insulator can also have good lightning protection characteristics after being struck by lightning during operation, and its operation safety is relatively high.

[0079] When the lightning protection insulator flashes over the external insulation under the impact of all lightning waves, and / or the gap of the insulation section does not cut off the power frequency continuous current within the preset power frequency period, the processor can determine that the insulation recovery capacity test result is unqualified. At this time, it means that the lightning protection insulator is difficult to recover quickly after being struck by lightning, which may cause the transmission line to fail and the operation safety is low.

[0080] Step 105: Determine the operational reliability of the lightning protection insulator according to the voltage test result, the tensile strength test result, and the insulation recovery capacity test result.

[0081] The processor can determine the operational reliability of the lightning protection insulator according to the voltage test results, the tensile strength test results, and the insulation recovery capacity test results. Specifically, if the voltage test results, the tensile strength test results, and the insulation recovery capacity test results of the lightning protection insulator are all qualified, it can be said that the operational reliability of the lightning protection insulator meets the preset requirements, and the lightning protection insulator can operate stably for a long time on the transmission line. If any one of the voltage test results, the tensile strength test results, and the insulation recovery capacity test results of the lightning protection insulator is unqualified, it can be said that the operational reliability of the lightning protection insulator does not meet the preset requirements, and the lightning protection insulator may make the transmission line where it is located and the power equipment on the transmission line vulnerable to lightning failures.

[0082] like Figure 3 As shown, a flow chart of another method for testing the operational reliability of lightning protection insulators is provided.

[0083] When testing the operational reliability of lightning protection insulators, the voltage of lightning protection insulators is tested by power frequency voltage and operating impulse voltage. Specifically, a preset duration of overvoltage higher than the maximum power frequency overvoltage of the line is applied to the entire lightning protection insulator and its insulating section under rain conditions, and the operating impulse voltage tolerance test is performed for the entire lightning protection insulator and its insulating section under rain conditions for a preset number of times. If it is a 500kV lightning protection insulator, the duration of the applied power frequency voltage can be set to 1min. If it is a 330kV lightning protection insulator, the number of times the operating impulse voltage is applied can be set to 15 times. During the entire test process, no insulation flashover occurs in the entire lightning protection insulator and its insulating section. After the test is completed, the internal zinc oxide resistor is not damaged, which can ensure that the lightning protection insulator can be connected to the grid for operation. At this time, even if an internal fault occurs during the operation of the lightning protection insulator, it will not cause the line insulation fault to stop operation. The lightning protection insulator can also withstand the maximum operating impulse overvoltage that may occur on the line, and the voltage test of the lightning protection insulator is qualified.

[0084] The tensile strength test of the lightning protection insulator under short-circuit high current is carried out. Specifically, according to the rated mechanical load of the entire lightning protection insulator and the line operation requirements, the tensile strength test under short-circuit high current is carried out in sequence according to the short-circuit high current test, the tensile strength test under rated load and the tensile failure test. Among them, the short-circuit high current test is to first damage the internal oxidizing resistor of the product under extremely high voltage, and then generate high temperature and high pressure by applying a large current to make it explode. The tensile strength test under rated load is to apply the tensile strength design value of the product to the lightning protection insulator to obtain the tensile strength test value, and then maintain a certain stretching time. The tensile failure test is to continue to stretch the lightning protection insulator after maintaining a certain stretching time to obtain the maximum tensile strength that can be sustained. During the entire test process, if the tensile strength test value is 1.1 times the rated load, and the maximum tensile strength that can be sustained during tensile failure is not less than 1.2 times the rated load, then the tensile strength test can be determined to be qualified. At this time, the lightning protection insulator has the ability to suspend the conductor. Even in the extremely severe situation that the internal zinc oxide resistor explodes, the lightning protection insulator can still suspend the conductor, which will not cause line failure and shutdown, and there will be no risk of line string loss.

[0085] The insulation recovery capacity of the lightning protection insulator under lightning impulse flashover is tested. Specifically, an industrial frequency power supply device is used to apply an industrial frequency voltage to the lightning protection insulator test piece, and then the impulse voltage generator and the isolation ball gap are triggered to discharge when the phase angle of the industrial frequency voltage waveform is 0°, 30°, 45°, 60°, and 90° respectively. The shock wave generated by the discharge is output to the lightning protection insulator test piece through the series isolation protection lightning arrester and the isolation ball gap. When the insulation segment gap of the lightning protection insulator test piece is broken down but no external insulation flashover occurs on the entire branch, after the lightning wave disappears, the insulation segment gap can cut off the industrial frequency follow-current within half an industrial frequency cycle, the gap arc is extinguished, and no restrike occurs. At this time, the insulation recovery capacity test of the lightning protection insulator under lightning impulse flashover is qualified, and the lightning protection insulator can have good lightning protection characteristics and operation safety when struck by lightning during operation.

[0086] The operational reliability of lightning protection insulators can be determined based on voltage tests, tensile strength tests, and insulation recovery tests. Specifically, if the voltage test, tensile strength test, and insulation recovery test are all qualified, the lightning protection insulators can be normally connected to the grid and operate, and the lightning protection insulators have good lightning protection characteristics and operational safety.

[0087] Through the above technical scheme, voltage test and tensile strength test are carried out on the lightning protection insulator to be tested to ensure that the lightning protection insulator can operate normally after being hung on the grid, and insulation recovery capacity test is carried out on the lightning protection insulator to be tested to simulate the lightning strike condition when the lightning protection insulator is struck by lightning. Therefore, the operating reliability of the lightning protection insulator can be more accurately evaluated according to the voltage test results, tensile strength test results and insulation recovery capacity test results, ensuring that the lightning protection insulator can operate normally after being hung on the grid, and reducing lightning faults of the transmission lines to which the lightning protection insulator is hung and the power equipment and facilities on the transmission lines.

[0088] Figure 1 and 3 FIG. 1 is a flow chart of a method for testing the operational reliability of a lightning protection insulator in one embodiment. Figure 1 and 3 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 1 and 3 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0089] In one embodiment, a device for testing the operational reliability of a lightning protection insulator is provided, comprising:

[0090] A voltage test module is used to perform voltage test on the lightning protection insulator to be tested and the insulating section of the lightning protection insulator to obtain the voltage test result of the lightning protection insulator;

[0091] A tensile strength test module is used to perform a tensile strength test on the lightning protection insulator based on a preset short-circuit current to obtain a tensile strength test result of the lightning protection insulator under the preset short-circuit current;

[0092] A power frequency voltage application module is used to apply a preset power frequency voltage to the lightning protection insulator through a power frequency power supply device in a power frequency impulse test circuit where the lightning protection insulator is located, so as to obtain a power frequency voltage waveform signal;

[0093] The insulation recovery capacity test module is used to control the power frequency impulse test circuit to output the corresponding lightning wave to the lightning protection insulator when reaching different phase angles of the power frequency voltage waveform signal, so as to obtain the insulation recovery capacity test result of the lightning protection insulator;

[0094] The operation reliability determination module is used to determine the operation reliability of the lightning protection insulator according to the voltage test results, the tensile strength test results and the insulation recovery capacity test results.

[0095] In an embodiment of the present application, a voltage testing module is used to perform a voltage test on a lightning protection insulator to be tested and an insulating segment of the lightning protection insulator to obtain a voltage test result of the lightning protection insulator, including: applying a first preset power frequency voltage for a preset time to the lightning protection insulator under rain conditions, and applying a second preset power frequency voltage for a preset time to the insulating segment of the lightning protection insulator under rain conditions; applying a first operating impulse overvoltage and a second operating impulse overvoltage for a preset number of times to the lightning protection insulator and the insulating segment after applying the corresponding preset power frequency voltage under rain conditions according to the voltage level of the lightning protection insulator; judging whether insulation flashover occurs in the lightning protection insulator and the insulating segment after applying the preset number of operating impulse overvoltages; judging whether the zinc oxide resistor included in the lightning arrester segment of the lightning protection insulator is damaged after applying the preset number of operating impulse overvoltages; and determining the voltage test result according to the test results of whether insulation flashover occurs and the test results of whether the zinc oxide resistor is damaged.

[0096] In an embodiment of the present application, a voltage test module is used to determine a voltage test result based on a test result of whether insulation flashover occurs and a test result of whether the zinc oxide resistor is damaged, including: when no insulation flashover occurs in the lightning protection insulator and the insulation section after a preset number of operating impulse overvoltages are applied, and the zinc oxide resistor included in the lightning arrester section is not damaged, the voltage test result is determined to be qualified.

[0097] In an embodiment of the present application, a tensile strength testing module is used to perform a tensile strength test on a lightning protection insulator based on a preset short-circuit current to obtain a tensile strength test result of the lightning protection insulator under a preset short-circuit current, including: applying a preset voltage to the lightning arrester section of the lightning protection insulator to damage the zinc oxide resistor in the lightning arrester section of the lightning protection insulator, so that the lightning protection insulator is in a first state to be tested; applying a preset short-circuit current to the lightning arrester section of the lightning protection insulator in the first state to be tested to cause the zinc oxide resistor to burst, so that the lightning protection insulator is in a second state to be tested; performing a tensile strength test on the lightning protection insulator in the second state to be tested to obtain a tensile strength test result of the lightning protection insulator under a preset short-circuit current.

[0098] In an embodiment of the present application, a tensile strength testing module is used to perform a tensile strength test on a lightning protection insulator in a second state to be tested to obtain a tensile strength test result of the lightning protection insulator under a preset short-circuit current, including: applying the rated load of the lightning protection insulator to the lightning protection insulator in the second state to be tested; determining whether the lightning protection insulator is damaged within a preset time after the rated load is applied; if the lightning protection insulator is not damaged within the preset time after the rated load is applied, performing a tensile damage test on the lightning protection insulator to obtain a tensile strength test curve of the lightning protection insulator; determining the maximum tensile strength that the lightning protection insulator can withstand during the tensile damage test according to the tensile strength test curve; and determining the tensile strength test result according to the maximum tensile strength.

[0099] In an embodiment of the present application, the tensile strength testing module is used to determine the tensile strength test result according to the maximum tensile strength, including: when the maximum tensile strength is greater than or equal to a preset multiple of the rated load, determining that the tensile strength test result is qualified.

[0100] In an embodiment of the present application, a power frequency impulse test circuit includes a power frequency power supply device, an impulse voltage generator, an isolation spherical gap, and a series isolation protection lightning arrester, the series isolation protection lightning arrester is respectively connected in series with the impulse voltage generator and the isolation spherical gap, the lightning protection insulator is connected in series with the power frequency power supply device, and the lightning protection insulator is connected in parallel with the isolation spherical gap; an insulation recovery capacity test module is used to control the power frequency impulse test circuit to output a corresponding lightning wave to the lightning protection insulator when reaching different phase angles of the power frequency voltage waveform signal to obtain an insulation recovery capacity test result of the lightning protection insulator, including: when reaching different phase angles of the power frequency voltage waveform signal, controlling the impulse voltage generator to discharge to generate a corresponding lightning wave; outputting the corresponding lightning wave generated by the discharge to the lightning protection insulator through the series isolation protection lightning arrester and the isolation spherical gap; judging whether external insulation flashover occurs after the lightning protection insulator and the insulation section are impacted by the corresponding lightning wave, and judging whether the gap of the insulation section of the lightning protection insulator cuts off the power frequency continuous current within a preset power frequency period; determining the insulation recovery capacity test result according to the test result of whether external insulation flashover occurs and the test result of whether the power frequency continuous current is cut off.

[0101] In an embodiment of the present application, the insulation recovery capacity test module is used to determine the insulation recovery capacity test result according to the test result of whether external insulation flashover occurs and the test result of whether the power frequency continuous current is cut off, including: when external insulation flashover does not occur in the lightning protection insulator and the insulation segment under all lightning wave impacts, and the gap of the insulation segment cuts off the power frequency continuous current within a preset power frequency cycle, the insulation recovery capacity test result is determined to be qualified.

[0102] In one embodiment, an electronic device is provided, comprising:

[0103] a memory configured to store instructions;

[0104] The processor is configured to call the instructions from the memory and implement the above-mentioned method for testing the operational reliability of lightning protection insulators when executing the instructions.

[0105] In one embodiment, a storage medium is provided, on which a program is stored, and when the program is executed by a processor, the method for testing the operational reliability of a lightning protection insulator is implemented.

[0106] In one embodiment, a processor is provided, and the processor is used to run a program, wherein the program executes the above method for testing the operational reliability of a lightning protection insulator when it is run.

[0107] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Figure 4As shown. The computer device includes a processor A01, a network interface A02, a memory (not shown in the figure) and a database (not shown in the figure) connected through a system bus. Among them, the processor A01 of the computer device is used to provide computing and control capabilities. The memory of the computer device includes an internal memory A03 and a non-volatile storage medium A04. The non-volatile storage medium A04 stores an operating system B01, a computer program B02 and a database (not shown in the figure). The internal memory A03 provides an environment for the operation of the operating system B01 and the computer program B02 in the non-volatile storage medium A04. The database of the computer device is used to store data such as voltage test results, tensile strength test results and insulation recovery ability test results. The network interface A02 of the computer device is used to communicate with an external terminal through a network connection. When the computer program B02 is executed by the processor A01, a method for testing the operational reliability of lightning protection insulators is implemented.

[0108] Those skilled in the art will understand that Figure 4 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0109] An embodiment of the present application provides a device, which includes a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, the following steps are implemented: performing a voltage test on a lightning protection insulator to be tested and an insulating segment of the lightning protection insulator to obtain a voltage test result of the lightning protection insulator; performing a tensile strength test on the lightning protection insulator based on a preset short-circuit current to obtain a tensile strength test result of the lightning protection insulator under the preset short-circuit current; applying a preset power frequency voltage to the lightning protection insulator through a power frequency power supply device in a power frequency impulse test circuit where the lightning protection insulator is located to obtain a power frequency voltage waveform signal; when reaching different phase angles of the power frequency voltage waveform signal, controlling the power frequency impulse test circuit to output a corresponding lightning wave to the lightning protection insulator to obtain an insulation recovery capacity test result of the lightning protection insulator; and determining the operating reliability of the lightning protection insulator according to the voltage test result, the tensile strength test result, and the insulation recovery capacity test result.

[0110] In one embodiment, voltage tests are performed on the lightning protection insulator to be tested and the insulating segment of the lightning protection insulator to obtain the voltage test results of the lightning protection insulator, including: applying a first preset power frequency voltage for a preset duration to the lightning protection insulator under rain conditions, and applying a second preset power frequency voltage for the preset duration to the insulating segment of the lightning protection insulator under rain conditions; applying a first operating impulse overvoltage and a second operating impulse overvoltage for a preset number of times to the lightning protection insulator and the insulating segment after applying the corresponding preset power frequency voltage under rain conditions according to the voltage level of the lightning protection insulator; judging whether insulation flashover occurs in the lightning protection insulator and the insulating segment after applying the preset number of operating impulse overvoltages; judging whether the zinc oxide resistor included in the arrester segment of the lightning protection insulator is damaged after applying the preset number of operating impulse overvoltages; and determining the voltage test results according to the test results of whether insulation flashover occurs and the test results of whether the zinc oxide resistor is damaged.

[0111] In one embodiment, determining the voltage test result based on the test results of whether insulation flashover occurs and the test results of whether the zinc oxide resistor is damaged includes: when no insulation flashover occurs in the lightning protection insulator and the insulation section after a preset number of operating impulse overvoltages are applied, and the zinc oxide resistor included in the lightning arrester section is not damaged, determining that the voltage test result is qualified.

[0112] In one embodiment, a tensile strength test is performed on a lightning protection insulator based on a preset short-circuit current to obtain a tensile strength test result of the lightning protection insulator under the preset short-circuit current, including: applying a preset voltage to the lightning arrester section of the lightning protection insulator to damage the zinc oxide resistor in the lightning arrester section of the lightning protection insulator, so that the lightning protection insulator is in a first state to be tested; applying a preset short-circuit current to the lightning arrester section of the lightning protection insulator in the first state to be tested to cause the zinc oxide resistor to burst, so that the lightning protection insulator is in a second state to be tested; performing a tensile strength test on the lightning protection insulator in the second state to be tested to obtain a tensile strength test result of the lightning protection insulator under the preset short-circuit current.

[0113] In one embodiment, a tensile strength test is performed on a lightning protection insulator in a second state to be tested to obtain a tensile strength test result of the lightning protection insulator under a preset short-circuit current, including: applying the rated load of the lightning protection insulator to the lightning protection insulator in the second state to be tested; determining whether the lightning protection insulator is damaged within a preset time after the rated load is applied; if the lightning protection insulator is not damaged within the preset time after the rated load is applied, performing a tensile damage test on the lightning protection insulator to obtain a tensile strength test curve of the lightning protection insulator; determining the maximum tensile strength that the lightning protection insulator can withstand during the tensile damage test according to the tensile strength test curve; and determining the tensile strength test result according to the maximum tensile strength.

[0114] In one embodiment, determining the tensile strength test result according to the maximum tensile strength includes: determining the tensile strength test result as qualified when the maximum tensile strength is greater than or equal to a preset multiple of the rated load.

[0115] In one embodiment, a power frequency impulse test circuit includes a power frequency power supply device, an impulse voltage generator, an isolation spherical gap, and a series isolation protection lightning arrester, the series isolation protection lightning arrester is respectively connected in series with the impulse voltage generator and the isolation spherical gap, the lightning protection insulator is connected in series with the power frequency power supply device, and the lightning protection insulator is connected in parallel with the isolation spherical gap; when reaching different phase angles of the power frequency voltage waveform signal, the power frequency impulse test circuit is controlled to output the corresponding lightning wave to the lightning protection insulator to obtain the insulation recovery capacity test result of the lightning protection insulator, including: when reaching different phase angles of the power frequency voltage waveform signal, the impulse voltage generator is controlled to discharge to generate the corresponding lightning wave; the corresponding lightning wave generated by the discharge is output to the lightning protection insulator through the series isolation protection lightning arrester and the isolation spherical gap; it is judged whether external insulation flashover occurs after the lightning protection insulator and the insulation section are impacted by the corresponding lightning wave, and it is judged whether the gap of the insulation section of the lightning protection insulator cuts off the power frequency continuous current within the preset power frequency period; the insulation recovery capacity test result is determined according to the test result of whether external insulation flashover occurs and the test result of whether the power frequency continuous current is cut off.

[0116] In one embodiment, the insulation recovery capacity test result is determined based on the test result of whether external insulation flashover occurs and the test result of whether the power frequency continuous current is cut off, including: when external insulation flashover does not occur in the lightning protection insulator and the insulation segment under all lightning wave impacts, and the gap of the insulation segment cuts off the power frequency continuous current within a preset power frequency cycle, the insulation recovery capacity test result is determined to be qualified.

[0117] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing a program that initializes the method steps for testing the operational reliability of a lightning protection insulator.

[0118] 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 in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0119] 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.

[0120] 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 including 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.

[0121] 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 in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0122] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0123] 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.

[0124] 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 tape 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.

[0125] 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.

[0126] 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 method for testing the operational reliability of a lightning protection insulator, characterized in that: The method comprises: Performing a voltage test on the lightning protection insulator to be tested and the insulating section of the lightning protection insulator to obtain a voltage test result of the lightning protection insulator; Performing a tensile strength test on the lightning protection insulator based on a preset short-circuit current to obtain a tensile strength test result of the lightning protection insulator under the preset short-circuit current; Applying a preset power frequency voltage to the lightning protection insulator through a power frequency power supply device in a power frequency impulse test circuit where the lightning protection insulator is located, so as to obtain a power frequency voltage waveform signal; When reaching different phase angles of the power frequency voltage waveform signal, controlling the power frequency impulse test circuit to output corresponding lightning waves to the lightning protection insulator, so as to obtain the insulation recovery capacity test result of the lightning protection insulator; The operational reliability of the lightning protection insulator is determined according to the voltage test result, the tensile strength test result and the insulation recovery capacity test result.

2. The method for testing the operational reliability of a lightning protection insulator according to claim 1, characterized in that: The step of performing a voltage test on the lightning protection insulator to be tested and the insulating section of the lightning protection insulator to obtain a voltage test result of the lightning protection insulator comprises: Applying a first preset power frequency voltage for a preset time period to the lightning protection insulator under rain conditions, and applying a second preset power frequency voltage for the preset time period to the insulating section of the lightning protection insulator under rain conditions; According to the voltage level of the lightning protection insulator, a first operating impulse overvoltage and a second operating impulse overvoltage are respectively applied to the lightning protection insulator and the insulating section after the corresponding preset power frequency voltage is applied under rain conditions for a preset number of times; Determine whether insulation flashover occurs in the lightning protection insulator and the insulation section after a preset number of switching impulse overvoltages are applied; Determining whether the zinc oxide resistor included in the arrester section of the lightning protection insulator is damaged after applying the preset number of operating impulse overvoltages; The voltage test result is determined according to the test result of whether insulation flashover occurs and the test result of whether the zinc oxide resistor is damaged.

3. The method for testing the operational reliability of a lightning protection insulator according to claim 2, characterized in that: The step of determining the voltage test result according to the test result of whether insulation flashover occurs and the test result of whether the zinc oxide resistor is damaged includes: When no insulation flashover occurs in the lightning protection insulator and the insulating section after applying the operating impulse overvoltage a preset number of times, and the zinc oxide resistor included in the lightning arrester section is not damaged, the voltage test result is determined to be qualified.

4. The method for testing the operational reliability of a lightning protection insulator according to claim 1, characterized in that: The tensile strength test of the lightning protection insulator is performed based on the preset short-circuit current to obtain the tensile strength test result of the lightning protection insulator under the preset short-circuit current, which includes: Applying a preset voltage to the lightning arrester section of the lightning protection insulator to damage the zinc oxide resistor in the lightning arrester section of the lightning protection insulator, so that the lightning protection insulator is in a first state to be tested; Applying the preset short-circuit current to the arrester section of the lightning protection insulator in the first state to be tested, so as to cause the zinc oxide resistor to explode, so as to put the lightning protection insulator in the second state to be tested; A tensile strength test is performed on the lightning protection insulator in the second to-be-tested state to obtain a tensile strength test result of the lightning protection insulator under the preset short-circuit current.

5. The method for testing the operational reliability of a lightning protection insulator according to claim 4, characterized in that: The performing of a tensile strength test on the lightning protection insulator in the second to-be-tested state to obtain a tensile strength test result of the lightning protection insulator under the preset short-circuit current comprises: Applying a rated load of the lightning protection insulator to the lightning protection insulator in the second state to be tested; Determine whether the lightning protection insulator is damaged within a preset time after the rated load is applied; When the lightning protection insulator does not break within the preset time after the rated load is applied, a tensile damage test is performed on the lightning protection insulator to obtain a tensile strength test curve of the lightning protection insulator; Determine the maximum tensile strength that the lightning protection insulator can withstand during the tensile failure test according to the tensile strength test curve; The tensile strength test result is determined according to the maximum tensile strength.

6. The method for testing the operational reliability of a lightning protection insulator according to claim 5, characterized in that: Determining the tensile strength test result according to the maximum tensile strength comprises: When the maximum tensile strength is greater than or equal to a preset multiple of the rated load, the tensile strength test result is determined to be qualified.

7. The method for testing the operational reliability of a lightning protection insulator according to claim 1, characterized in that: The power frequency impulse test circuit includes a power frequency power supply device, an impulse voltage generator, an isolation spherical gap and a series isolation protection lightning arrester, wherein the series isolation protection lightning arrester is connected in series with the impulse voltage generator and the isolation spherical gap respectively, the lightning protection insulator is connected in series with the power frequency power supply device, and the lightning protection insulator is connected in parallel with the isolation spherical gap; When reaching different phase angles of the power frequency voltage waveform signal, controlling the power frequency impulse test circuit to output corresponding lightning waves to the lightning protection insulator to obtain the insulation recovery capacity test result of the lightning protection insulator includes: When reaching different phase angles of the power frequency voltage waveform signal, controlling the impulse voltage generator to discharge so as to generate corresponding lightning waves; Outputting the corresponding lightning wave generated by the discharge to the lightning protection insulator through the series isolation protection arrester and the isolation spherical gap; Determine whether external insulation flashover occurs after the lightning protection insulator and the insulating section are impacted by the corresponding lightning wave, and determine whether the gap of the insulating section of the lightning protection insulator cuts off the power frequency continuous current within a preset power frequency period; The insulation recovery capacity test result is determined according to the test result of whether external insulation flashover occurs and the test result of whether the power frequency continuous current is cut off.

8. The method for testing the operational reliability of a lightning protection insulator according to claim 7, characterized in that: Determining the insulation recovery capacity test result according to the test result of whether external insulation flashover occurs and the test result of whether power frequency continuous current is cut off includes: When the lightning protection insulator and the insulating section do not experience external insulation flashover under all lightning wave impacts, and the gap of the insulating section cuts off the power frequency continuous current within the preset power frequency cycle, the insulation recovery capacity test result is determined to be qualified.

9. A device for testing the operational reliability of lightning protection insulators, characterized in that: The device comprises: A voltage test module is used to perform a voltage test on the lightning protection insulator to be tested and the insulating section of the lightning protection insulator to obtain a voltage test result of the lightning protection insulator; A tensile strength test module, used to perform a tensile strength test on the lightning protection insulator based on a preset short-circuit current to obtain a tensile strength test result of the lightning protection insulator under the preset short-circuit current; A power frequency voltage applying module, used for applying a preset power frequency voltage to the lightning protection insulator through a power frequency power supply device in a power frequency impulse test circuit where the lightning protection insulator is located, so as to obtain a power frequency voltage waveform signal; An insulation recovery capacity test module, used for controlling the power frequency impulse test circuit to output corresponding lightning waves to the lightning protection insulator when reaching different phase angles of the power frequency voltage waveform signal, so as to obtain the insulation recovery capacity test result of the lightning protection insulator; An operation reliability determination module is used to determine the operation reliability of the lightning protection insulator according to the voltage test result, the tensile strength test result and the insulation recovery capacity test result.

10. The device for testing the operational reliability of lightning protection insulators according to claim 9, characterized in that: The voltage testing module is used to perform voltage testing on the lightning protection insulator to be tested and the insulating section of the lightning protection insulator to obtain the voltage test result of the lightning protection insulator, including: Applying a first preset power frequency voltage for a preset time period to the lightning protection insulator under rain conditions, and applying a second preset power frequency voltage for the preset time period to the insulating section of the lightning protection insulator under rain conditions; According to the voltage level of the lightning protection insulator, a first operating impulse overvoltage and a second operating impulse overvoltage are respectively applied to the lightning protection insulator and the insulating section after the corresponding preset power frequency voltage is applied under rain conditions for a preset number of times; Determine whether insulation flashover occurs in the lightning protection insulator and the insulation section after a preset number of switching impulse overvoltages are applied; Determining whether the zinc oxide resistor included in the arrester section of the lightning protection insulator is damaged after applying the preset number of operating impulse overvoltages; The voltage test result is determined according to the test result of whether insulation flashover occurs and the test result of whether the zinc oxide resistor is damaged.

11. The device for testing the operational reliability of lightning protection insulators according to claim 10, characterized in that: The voltage test module is used to determine the voltage test result according to the test result of whether insulation flashover occurs and the test result of whether the zinc oxide resistor is damaged, including: When no insulation flashover occurs in the lightning protection insulator and the insulating section after applying the operating impulse overvoltage a preset number of times, and the zinc oxide resistor included in the lightning arrester section is not damaged, the voltage test result is determined to be qualified.

12. The device for testing the operational reliability of lightning protection insulators according to claim 9, characterized in that: The tensile strength test module is used to perform a tensile strength test on the lightning protection insulator based on a preset short-circuit current to obtain a tensile strength test result of the lightning protection insulator under the preset short-circuit current, including: Applying a preset voltage to the lightning arrester section of the lightning protection insulator to damage the zinc oxide resistor in the lightning arrester section of the lightning protection insulator, so that the lightning protection insulator is in a first state to be tested; Applying the preset short-circuit current to the arrester section of the lightning protection insulator in the first state to be tested, so as to cause the zinc oxide resistor to explode, so as to put the lightning protection insulator in the second state to be tested; A tensile strength test is performed on the lightning protection insulator in the second to-be-tested state to obtain a tensile strength test result of the lightning protection insulator under the preset short-circuit current.

13. The device for testing the operational reliability of lightning protection insulators according to claim 12, characterized in that: The tensile strength test module is used to perform a tensile strength test on the lightning protection insulator in the second state to be tested to obtain a tensile strength test result of the lightning protection insulator under the preset short-circuit current, including: Applying a rated load of the lightning protection insulator to the lightning protection insulator in the second state to be tested; Determine whether the lightning protection insulator is damaged within a preset time after the rated load is applied; When the lightning protection insulator does not break within the preset time after the rated load is applied, a tensile damage test is performed on the lightning protection insulator to obtain a tensile strength test curve of the lightning protection insulator; Determine the maximum tensile strength that the lightning protection insulator can withstand during the tensile failure test according to the tensile strength test curve; The tensile strength test result is determined according to the maximum tensile strength.

14. The device for testing the operational reliability of lightning protection insulators according to claim 13, characterized in that: The tensile strength testing module, used to determine the tensile strength test result according to the maximum tensile strength, comprises: When the maximum tensile strength is greater than or equal to a preset multiple of the rated load, the tensile strength test result is determined to be qualified.

15. The device for testing the operational reliability of lightning protection insulators according to claim 9, characterized in that: The power frequency impulse test circuit includes a power frequency power supply device, an impulse voltage generator, an isolation spherical gap and a series isolation protection lightning arrester, wherein the series isolation protection lightning arrester is connected in series with the impulse voltage generator and the isolation spherical gap respectively, the lightning protection insulator is connected in series with the power frequency power supply device, and the lightning protection insulator is connected in parallel with the isolation spherical gap; The insulation recovery capacity test module is used to control the power frequency impulse test circuit to output the corresponding lightning wave to the lightning protection insulator when reaching different phase angles of the power frequency voltage waveform signal, so as to obtain the insulation recovery capacity test result of the lightning protection insulator, including: When reaching different phase angles of the power frequency voltage waveform signal, controlling the impulse voltage generator to discharge so as to generate corresponding lightning waves; Outputting the corresponding lightning wave generated by the discharge to the lightning protection insulator through the series isolation protection arrester and the isolation spherical gap; Determine whether external insulation flashover occurs after the lightning protection insulator and the insulating section are impacted by the corresponding lightning wave, and determine whether the gap of the insulating section of the lightning protection insulator cuts off the power frequency continuous current within a preset power frequency period; The insulation recovery capacity test result is determined according to the test result of whether external insulation flashover occurs and the test result of whether the power frequency continuous current is cut off.

16. The device for testing the operational reliability of lightning protection insulators according to claim 15, characterized in that: The insulation recovery capacity test module is used to determine the insulation recovery capacity test result according to the test result of whether the external insulation flashover occurs and the test result of whether the power frequency continuous current is cut off, including: When the lightning protection insulator and the insulating section do not experience external insulation flashover under all lightning wave impacts, and the gap of the insulating section cuts off the power frequency continuous current within the preset power frequency cycle, the insulation recovery capacity test result is determined to be qualified.

17. An electronic device, characterized in that: include: a memory configured to store instructions; A processor is configured to call the instructions from the memory and implement the method for testing the operational reliability of a lightning protection insulator according to any one of claims 1 to 8 when executing the instructions.

18. A machine-readable storage medium, characterized in that: The machine-readable storage medium stores instructions, which are used to enable a machine to execute the method for testing the operational reliability of a lightning protection insulator according to any one of claims 1 to 8.

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