Damping detection method, system, medium and equipment for lightning arrester with controllable commutation converter valve

Abstract

The invention relates to a controllable commutation converter valve lightning arrester damping detection method, system, medium and equipment, and the method comprises the steps: sampling a valve plate of a controllable commutation converter valve lightning arrester to be detected to obtain a lightning arrester valve plate sample; carrying out thermal weight loss test on the lightning arrester valve plate sample by the thermogravimetric differential thermal analysis equipment, and drawing a thermal weight loss TG curve; calculating the mass change percentage of the lightning arrester valve plate sample after heating based on a thermal weight loss TG curve; according to the mass change of the brand-new dry valve plate after the thermal weight loss test, comparing the mass change of the lightning arrester valve plate sample with the mass change of the brand-new dry valve plate; and judging whether the lightning arrester valve plate sample is affected with damp or not according to a comparison result.

Description

Technical Field

[0001] The present invention relates to the technical field of arrester testing, and particularly to a method, system, medium and device for detecting moisture ingress in a controllable commutation valve arrester. Background Art

[0002] Thermogravimetric differential thermal analysis equipment (TG-DSC equipment) can perform thermogravimetric analysis (TG analysis). Under programmed temperature control, the relationship between the mass of a substance and temperature or time is measured. The instrument for performing thermogravimetric analysis is called a thermogravimeter, which mainly consists of three parts: a temperature control system, a detection system, and a recording system. Differential scanning calorimetry (DSC) is to study the change of physical quantities (ΔQ and ΔH) of a substance with temperature under programmed temperature control, that is, by controlling the change of temperature program, while the temperature is changing, the relationship between the power difference (heat flow rate) of the test sample and the reference sample and temperature is measured. Thermogravimetric technology has the characteristics of high precision and is widely used in fields such as cable moisture ingress detection. At present, thermogravimetric detection has not been used in the field of moisture ingress detection for arrester valve discs.

[0003] Zinc oxide valve discs are formed by sintering and pressing. In the microscopic structure inside the valve disc, there are air gaps and microcracks with extremely small pore diameters of different sizes. These microdefects are mainly caused by the non-uniformity of the internal cooling shrinkage effect during the sintering production process of the valve disc. In a humid environment, moisture will enter the valve disc through the above-mentioned microcracks, making the microcracks become high-conductivity resistance channels. When the valve disc is affected by moisture, thermal aging will occur, and the resistive leakage current flowing through the resistor disc will increase, resulting in an increase in thermal power consumption, and ultimately may lead to thermal breakdown or even explosion accidents of the arrester.

[0004] Controllable commutation valve arresters need to withstand continuous large current pulses within a certain period of time. Existing valve disc detection methods are all based on the electrical quantities described in the GB / T 11032-2020 standard, mainly including heat dissipation characteristic tests, residual voltage tests, large current impulse withstand tests, etc. For those affected by moisture, it can be further improved. Therefore, more detailed evaluation methods and processes are needed to solve the above problems.

[0005] The above information disclosed in the background art section is only used to enhance the understanding of the background of the present invention. Therefore, it may contain information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0006] The present invention provides a method, system, medium and device for detecting moisture ingress in a controllable commutation valve arrester. By taking samples of the valve disc of the arrester to be tested and performing TG-DSC tests, and comparing with the TG-DSC results of a brand-new and dry valve disc, a new idea for judging whether the valve disc is affected by moisture is provided, and the moisture ingress detection of the arrester is improved.

[0007] A method for detecting moisture ingress in a controllable phase - commutation converter valve arrester includes: Sampling the valve discs of the controllable phase - commutation converter valve arrester to be tested to obtain arrester valve disc samples; A thermogravimetric and differential thermal analysis device performs a thermogravimetric test on the arrester valve disc samples and plots a thermogravimetric TG curve; Based on the thermogravimetric TG curve, calculate the percentage of the mass change of the arrester valve disc samples after heating; According to the mass change of a brand - new dry valve disc after thermogravimetric testing, compare it with the mass change of the arrester valve disc samples; judge whether there is moisture ingress in the arrester valve disc samples according to the comparison result.

[0008] In the method for detecting moisture ingress in a controllable phase - commutation converter valve arrester, the size of the arrester valve disc samples is adapted to the thermogravimetric and differential thermal analysis device.

[0009] In the method for detecting moisture ingress in a controllable phase - commutation converter valve arrester, when the thermogravimetric and differential thermal analysis device performs a thermogravimetric test on the arrester valve disc samples, during heating, the mass data of the arrester valve disc samples is detected in real - time, and the time, temperature, and mass data are synchronously plotted in real - time as a line graph. The line graph is the thermogravimetric TG curve, including a time - temperature curve, a mass - time curve, and a mass - temperature curve.

[0010] In the method for detecting moisture ingress in a controllable phase - commutation converter valve arrester, according to the thermogravimetric test of a brand - new dry valve disc, a standard valve disc thermogravimetric curve is plotted to obtain the mass change of the brand - new dry valve disc.

[0011] In the method for detecting moisture ingress in a controllable phase - commutation converter valve arrester, the valve discs include zinc - oxide arrester valve discs.

[0012] In the method for detecting moisture ingress in a controllable phase - commutation converter valve arrester, the final temperatures of the thermogravimetric test of the arrester valve disc samples and the thermogravimetric test of the brand - new dry valve discs should be the same.

[0013] In the method for detecting moisture ingress in a controllable phase - commutation converter valve arrester, if the mass change of the arrester valve disc samples is greater than the mass change of the brand - new dry valve discs, it is judged that there is moisture ingress in the arrester valve disc samples.

[0014] A system for detecting moisture ingress in a controllable phase - commutation converter valve arrester includes, A sampling unit, which is used to sample the valve discs of the controllable phase - commutation converter valve arrester to be tested to obtain arrester valve disc samples; A thermogravimetric and differential thermal analysis device, which performs a thermogravimetric test on the arrester valve disc samples and plots a thermogravimetric TG curve; A calculation unit, which is used to calculate the percentage of the mass change of the arrester valve disc samples after heating based on the thermogravimetric TG curve; A judgment unit, which compares the mass change of the arrester valve disc sample with that of a brand-new and dried valve disc after a thermogravimetric test; and determines whether there is moisture absorption in the arrester valve disc sample according to the comparison result.

[0015] In the described moisture absorption detection system for a controllable phase-shifting converter valve arrester, the thermogravimetric and differential thermal analysis equipment includes a balance, a temperature measuring device, a heating device, and a system control center connecting the balance, the temperature measuring device, and the heating device.

[0016] A computer storage medium, the storage medium includes computer instructions, when it runs on a computer, it causes the computer to execute the described method.

[0017] An electronic device, the electronic device includes: A memory, a processor, and a computer program stored on the memory and executable on the processor, wherein, When the processor executes the program, the described method is implemented.

[0018] Compared with the prior art, the present invention has the following advantages: The present invention utilizes thermogravimetric technology to perform higher-precision detection on arrester valve discs to meet the working conditions of controllable phase-shifting converter valve arresters. Samples are taken from the controllable phase-shifting converter valve arresters according to requirements for preparation for detection; samples are prepared according to the requirements of the TG-DSC equipment and thermogravimetric tests are carried out, and the equipment automatically plots the thermogravimetric TG curve; the percentage of the mass change of the arrester valve disc sample after heating is calculated according to the data measured by the TG-DSC equipment; the mass change of the sample is compared with that of a brand-new and dried valve disc after a thermogravimetric test; whether there is moisture absorption in the valve disc is determined according to the comparison result. Moisture-absorbed valve discs are affected by water molecules and will have more mass loss during thermogravimetric tests. Judging the moisture absorption of valve discs by the percentage of mass reduction helps to detect the safety and reliability of arresters, reduce failures caused by arrester faults, and effectively guarantee the power usage needs of users. With the continuous development and innovation of related technologies, the level of moisture absorption detection and management of arrester valve discs will continue to improve, providing solid technical support for the safe and stable operation of transmission lines. Description of the Drawings

[0019] By reading the detailed description of the preferred specific embodiments below, various other advantages and benefits of the present invention will become clear to those of ordinary skill in the art. The drawings in the specification are only for the purpose of showing the preferred embodiments and are not considered as a limitation of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Moreover, throughout the drawings, the same reference numerals are used to represent the same components.

[0020] In the accompanying drawings: Figure 1 is a flowchart of a method for detecting moisture in the varistors of a lightning arrester according to an embodiment; Figure 2 is a physical diagram of a sample taken from the varistors of a certain lightning arrester according to an embodiment; Figure 3 is a schematic diagram of the operation of a TG-DSC device according to an embodiment; Figure 4 is a temperature-time curve graph drawn by a TG-DSC device according to an embodiment; Figure 5 is a varistor mass-time curve graph drawn by a TG-DSC device according to an embodiment; Figure 6 is a varistor mass-temperature curve graph drawn by a TG-DSC device according to an embodiment.

[0021] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments. Detailed Embodiment

[0022] The specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although specific embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be completely conveyed to those skilled in the art.

[0023] It should be noted that certain terms are used in the description and claims to refer to specific components. Those skilled in the art should understand that technicians may use different terms to refer to the same component. The description and claims of this specification do not use the difference in terms as a way to distinguish components, but use the difference in the functions of components as the criterion for distinction. As mentioned throughout the description and claims, "comprising" or "including" is an open-ended term and should be interpreted as "including but not limited to". The subsequent description of the specification is the preferred embodiment for implementing the present invention, but the description is for the purpose of the general principles of the specification and is not used to limit the scope of the present invention. The protection scope of the present invention shall be defined by the appended claims.

[0024] For the convenience of understanding the embodiments of the present invention, the following will further explain with specific embodiments as examples in conjunction with the accompanying drawings, and each of the accompanying drawings does not constitute a limitation to the embodiments of the present invention.

[0025] As Figures 1 to 6 shown, the method for detecting moisture in the thyristor-controlled phase-shifting converter valve lightning arrester includes the following steps: Sampling the varistors of the thyristor-controlled phase-shifting converter valve lightning arrester to be measured to obtain varistor samples of the lightning arrester; The thermogravimetric differential thermal analysis equipment conducts thermogravimetric tests on the arrester valve disc samples and plots the thermogravimetric TG curve; the thermogravimetric method measures the relationship between the mass of a substance and temperature under programmed temperature control. The curve obtained from the thermogravimetric method test is called the thermogravimetric TG curve. The thermogravimetric TG curve uses mass as the vertical coordinate, with mass decreasing from top to bottom, and temperature (or time) as the horizontal coordinate, with temperature (or time) increasing from left to right.

[0026] Calculate the percentage of the mass change of the arrester valve disc sample after heating based on the thermogravimetric TG curve; Compare the mass change of the arrester valve disc sample with that of a brand-new dry valve disc according to the mass change of the brand-new dry valve disc after thermogravimetric testing; judge whether there is moisture in the arrester valve disc sample based on the comparison result. The brand-new dry valve disc and the sample to be tested undergo thermogravimetric tests with the same duration and temperature range, and the moisture condition is judged by comparing the mass losses of the sample and the dry valve disc. The moisture-absorbed valve disc will lose more mass. The same temperature range is 30°C - 200°C, and the mass loss of the valve disc due to water vapor evaporation after the temperature rises is mainly detected to judge moisture absorption.

[0027] In the preferred implementation of the method for detecting moisture in a controllable phase-shifting converter valve arrester, the size of the arrester valve disc sample is adapted to the thermogravimetric differential thermal analysis equipment.

[0028] In the preferred implementation of the method for detecting moisture in a controllable phase-shifting converter valve arrester, when the thermogravimetric differential thermal analysis equipment conducts thermogravimetric tests on the arrester valve disc sample, the mass data of the arrester valve disc sample is detected in real time while heating, and the time, temperature, and mass data are synchronously plotted in real time as a line graph. The line graph is the thermogravimetric TG curve, including the time-temperature curve, mass-time curve, and mass-temperature curve.

[0029] In the preferred implementation of the method for detecting moisture in a controllable phase-shifting converter valve arrester, based on the thermogravimetric test of the brand-new dry valve disc, the standard thermogravimetric curve of the valve disc is plotted to obtain the mass change of the brand-new dry valve disc.

[0030] In the preferred implementation of the method for detecting moisture in a controllable phase-shifting converter valve arrester, the valve disc includes a zinc oxide arrester valve disc.

[0031] In the preferred implementation of the method for detecting moisture in a controllable phase-shifting converter valve arrester, the final temperatures of the thermogravimetric test of the arrester valve disc sample and the thermogravimetric test of the brand-new dry valve disc should be the same.

[0032] In the preferred implementation of the method for detecting moisture in a controllable phase-shifting converter valve arrester, if the mass change of the arrester valve disc sample is greater than the mass change of the brand-new dry valve disc, it is judged that there is moisture in the arrester valve disc sample.

[0033] A moisture detection system for a controllable commutation converter valve arrester includes a sampling unit configured to sample the valve discs of the controllable commutation converter valve arrester to be measured to obtain arrester valve disc samples; a thermogravimetric and differential thermal analysis device configured to perform thermogravimetric tests on the arrester valve disc samples and plot thermogravimetric TG curves; a calculation unit configured to calculate the percentage of the mass change of the arrester valve disc samples after heating based on the thermogravimetric TG curves; a judgment unit configured to compare the mass change of the arrester valve disc samples with that of a brand-new dry valve disc after thermogravimetric tests, and judge whether there is moisture in the arrester valve disc samples according to the comparison result.

[0034] In a preferred embodiment of a moisture detection system for a controllable commutation converter valve arrester, the thermogravimetric and differential thermal analysis device includes a balance, a temperature measuring device, a heating device, and a system control center connecting the balance, the temperature measuring device, and the heating device.

[0035] A computer storage medium, the storage medium includes computer instructions, which when running on a computer, cause the computer to execute the method described above.

[0036] An electronic device, the electronic device includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein when the processor executes the program, the method described above is implemented.

[0037] In one embodiment, as Figures 1 to 4 shown, a method for detecting moisture in arrester valve discs includes the following steps: Sampling the arrester according to requirements for preparation of detection; preparing samples according to the requirements of the TG-DSC device and performing thermogravimetric tests, and the device automatically plots thermogravimetric TG curves; Calculating the percentage of the mass change of the arrester valve disc samples after heating according to the data measured by the TG-DSC device; Comparing the mass change of the samples with that of a brand-new, dry valve disc after thermogravimetric tests; Judging whether there is moisture in the valve discs according to the comparison result. Moistened valve discs will lose more mass in thermogravimetric experiments. For example, the mass loss of a moistened valve disc is 0.15%, while that of an ordinary dry valve disc is only 0.075%.

[0038] In a preferred embodiment of the method for detecting moisture in the arrester valve disc, the valve disc to be tested generally refers to an arrester valve disc with defective performance that may be affected by moisture. Regarding the requirements for preparing samples using the TG-DSC equipment, there are generally regulations on the volume of the sample to be tested. Usually, the volume of the sample to be tested is not larger than 5mm * 5mm * 3mm. Thermogravimetric analysis (TG) refers to the process where the TG-DSC equipment monitors the mass of the sample using a high-precision balance while heating the sample, and synchronizes data such as time, temperature, and mass to the computer control software in real-time. The computer control software plots these parameters as a line graph.

[0039] In one embodiment, the percentage change in the mass of the arrester valve disc sample after heating is calculated based on the data measured by the TG-DSC equipment. Samples are taken from brand-new dry valve discs and the same TG-DSC test is conducted to plot the thermogravimetric curve of the standard valve disc for comparison with the samples. Moisture-affected valve discs are influenced by water molecules and will experience more mass loss during the thermogravimetric test. The moisture condition of the valve disc is judged by the percentage reduction in mass.

[0040] Refer to Figure 1 As shown, a method for detecting moisture in the arrester valve disc includes the following steps: S1: Take samples of the arrester valve disc for testing.

[0041] S2: Test the valve disc sample using the TG-DSC equipment and plot the thermogravimetric (TG) curve of the valve disc.

[0042] S3: Calculate the percentage change in mass during the thermogravimetric test of the valve disc.

[0043] S4: Compare with the percentage change in mass during the thermogravimetric test of the standard dry valve disc.

[0044] S5: Judge whether the valve disc is affected by moisture.

[0045] Figure 2 This is a physical diagram of the sample taken from an arrester valve disc in an embodiment. The size of the illustrated sample meets the sample size requirements of the TG-DSC equipment, and the volume is not larger than 5mm * 5mm * 3mm. The sample for the TG-DSC equipment can be a solid or a powder.

[0046] Figure 3It is a schematic diagram of the working process of the TG-DSC device in the embodiment. The TG-DSC device consists of a high-precision balance, a temperature measurement device, a heating device, and a system control center. The high-precision balance is used to place the sample to be measured and monitor the mass of the sample in real time during the heating process, and transmit the mass data to the system control center. The temperature measurement device is used to monitor the temperature inside the device and transmit the temperature to the system control center. The heating device is used to heat the inside of the TG-DSC device, and the heating temperature is controlled by the system control center. The system control center monitors the temperature inside the device through the temperature measurement device and controls the heating device to achieve a linear increase in temperature over time. The system control center receives time, temperature, and mass data and plots time-mass curves, temperature-mass curves, and time-temperature curves.

[0047] Figure 4 It is a temperature-time curve plotted by the TG-DSC device in the embodiment. The initial temperature is approximately 31.3 degrees Celsius, the final temperature is approximately 207.3 degrees Celsius, and the heating time is approximately 9 minutes and 30 seconds. After 1 minute of heating time, the temperature and time are approximately linearly related. Figure 5 It is a valve disc mass-time curve plotted by the TG-DSC device in the embodiment. The samples are divided into three types: dry valve discs, damp valve discs, and damp valve discs after being subjected to a large current impact. The dry valve disc is a brand-new and dry valve disc sample, the damp valve disc is a damp valve disc prepared by steaming, and the damp valve disc after impact is a valve disc that has been subjected to a current impact after being prepared as a damp valve disc. Figure 5 Among the shown damp valve discs, the mass change amplitude is the largest during the change with time, followed by the dry valve discs, and the mass change amplitude of the valve discs after being subjected to a large current impact is the smallest. The above mass change amounts all refer to the percentage of mass change, rather than the absolute value.

[0048] Figure 6 It is a valve disc mass-temperature curve plotted by the TG-DSC device in the embodiment. The samples are divided into three types: dry valve discs, damp valve discs, and damp valve discs after being subjected to a large current impact. The dry valve disc is a brand-new and dry valve disc sample, the damp valve disc is a damp valve disc prepared by steaming, and the damp valve disc after impact is a valve disc that has been subjected to a current impact after being prepared as a damp valve disc. Figure 6 Among the shown damp valve discs, the mass change amplitude is the largest during the heating process, followed by the dry valve discs, and the mass change amplitude of the valve discs after being subjected to a large current impact is the smallest. The above mass change amounts all refer to the percentage of mass change, rather than the absolute value.

[0049] In one embodiment, the thermogravimetric differential scanning calorimetry device includes, a housing, a high-precision balance, which is arranged inside the housing, and the arrester valve disc sample is arranged on the high-precision balance to measure its mass data in real time, a heating device, which is used to heat the arrester valve disc sample, A temperature measuring device that measures the temperature data of the arrester valve disc sample in real time, A system control center that connects the temperature measuring device and a high-precision balance to process the temperature data and mass data.

[0050] In several embodiments provided by the present invention, it should be understood that the disclosed method can be implemented as corresponding functional units, processors, or even systems. Each part of the system can be located in one place or distributed to multiple network units. One can select some or all of the units according to actual needs to achieve the purpose of the solution of this embodiment. Additionally, each functional unit can be integrated into one processing unit, or each unit can exist independently, or two or more units can be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units. If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a smart phone, personal digital assistant, wearable device, notebook computer, tablet computer) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs and other various media that can store program codes.

[0051] In one embodiment, the method includes, Using thermogravimetric technology, higher-precision detection of the arrester valve disc can be performed to meet the operating conditions of the controllable commutation converter valve arrester, Sampling the controllable commutation converter valve arrester according to requirements and preparing for detection; Preparing samples according to the requirements of the TG-DSC device and performing thermogravimetric tests. The device automatically plots the thermogravimetric TG curve; Calculating the percentage of the mass change of the arrester valve disc sample after heating based on the data measured by the TG-DSC device; Comparing the mass change of the sample with that of a brand-new, dry valve disc after thermogravimetric testing; Judging whether the valve disc is affected by moisture according to the comparison result.

[0052] The method provided by the present invention helps to detect the safety and reliability of lightning arresters, reduce faults caused by lightning arrester failures, and effectively guarantee the power usage requirements of users. With the continuous development and innovation of related technologies, the detection and management level of moisture in lightning arrester discs will continue to improve, providing solid technical support for the safe and stable operation of transmission lines.

[0053] Although the embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above specific embodiments and application fields. The above specific embodiments are merely illustrative and guiding, rather than restrictive. Those of ordinary skill in the art can also make many forms under the inspiration of this specification and without departing from the scope protected by the claims of the present invention, and all of these fall within the scope of protection of the present invention.

Claims

1. A method for detecting moisture in a controllable phase-changing valve arrester, characterized in that: The steps include: Sampling the valve plate of the controllable phase-changing valve arrester to be tested to obtain the arrester valve plate sample; Thermogravimetric differential thermal analysis equipment is used to conduct thermal weight loss test on arrester valve plate samples and draw thermal weight loss TG curves; The percentage of mass change of the arrester valve plate sample after heating is calculated based on the thermal weight loss TG curve; According to the mass change of the brand new dry valve plate after the thermal gravimetric test, the mass change of the lightning arrester valve plate sample is compared with it; based on the comparison result, it is determined whether the lightning arrester valve plate sample is affected by moisture.

2. A method for detecting moisture in a controllable phase-changing valve arrester according to claim 1, characterized in that: Preferably, the size of the arrester valve plate sample is suitable for a thermogravimetric differential thermal analysis device.

3. A method for detecting moisture in a controllable phase-changing valve arrester according to claim 1, characterized in that: When the thermogravimetric differential thermal analysis equipment conducts a thermal weight loss test on the arrester valve plate sample, the quality data of the arrester valve plate sample is detected in real time while heating.

4. A method for detecting moisture in a controllable phase-changing valve arrester according to claim 1, characterized in that: Based on the thermal weight loss test of new dry valve discs.

5. A method for detecting moisture in a controllable phase-changing valve arrester according to claim 1, characterized in that: The valve plates include zinc oxide arrester valve plates.

6. A method for detecting moisture in a controllable phase-changing valve arrester according to claim 1, characterized in that: The final temperature of the arrester valve plate sample thermal weight loss test and the new dry valve plate after thermal weight loss test should be the same.

7. A method for detecting moisture in a controllable phase-changing valve arrester according to claim 1, characterized in that: The mass change of the lightning arrester valve plate sample is greater than the mass change of the new dry valve plate, which indicates that the lightning arrester valve plate sample is affected by moisture.

8. A moisture detection system for a controllable phase-changing valve arrester, characterized in that: These include, A sampling unit, which is used to sample the valve plate of the controllable phase-changing commutation valve arrester to be tested to obtain a valve plate sample of the arrester; Thermogravimetric differential thermal analysis equipment, which performs thermal weight loss test on arrester valve plate samples and draws thermal weight loss TG curve; A calculation unit, which is used to calculate the percentage of mass change of the arrester valve plate sample after heating based on the thermal weight loss TG curve; The judgment unit compares the mass change of the arrester valve plate sample with the mass change of the brand new dry valve plate after the thermal gravimetric test; and judges whether the arrester valve plate sample is damp based on the comparison result.

9. A controllable phase-changing valve arrester moisture detection system according to claim 8, characterized in that: The thermogravimetric differential thermal analysis equipment comprises a balance, a temperature measuring device, a heating device and a system control center connecting the balance, the temperature measuring device and the heating device.

10. A computer storage medium, characterized in that: The storage medium includes computer instructions, which, when executed on a computer, enable the computer to execute the method according to any one of claims 1 to 7.

11. An electronic device, characterized in that: The electronic device comprises: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method according to any one of claims 1 to 7 is implemented.

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