A full-automatic capacitive current tester for neutral point ungrounded system

Abstract

The application discloses a kind of full-automatic capacitance current testers for neutral point ungrounded system, including tester body, first test module, second test module, third test module, fourth test module, vibration acquisition module, use information acquisition module, ground column acquisition module, bottom force acquisition module, bottom environment acquisition module, distance measuring module and display information acquisition module;The tester body is capacitance current test by the first test module, second test module, third test module and fourth test module being set, and the first test module, second test module, third test module and fourth test module are respectively capacitance current test using different test methods to obtain the first test result, second test result, third test result and fourth test result.The application can more accurately and safely carry out capacitance current test operation.

Description

Technical Field

[0001] This invention relates to the field of capacitance current testers, and more specifically to a fully automatic capacitance current tester for neutral point ungrounded systems. Background Technology

[0002] With the ongoing urban and rural power grid upgrades, capacitor compensation devices have experienced unprecedented development, and newly developed products have been put into operation. However, this has been accompanied by a significant increase in capacitor accident rates, especially the recurrence of explosions and fires that had not been seen in capacitor devices for many years, resulting in serious mass casualty incidents. After careful analysis and research of the accidents, the reactive power compensation device expert working group concluded that in addition to declining product quality from manufacturers, another important reason for the increased accident rate was the lack of operational preventative measures during the transition between old and new reactive power compensation technology management and operation personnel.

[0003] Therefore, a capacitance current tester is needed to perform safe capacitor measurements.

[0004] Existing capacitance current testers are susceptible to environmental influences and prone to significant errors, and their safety is not high enough, which affects their use. Therefore, a fully automatic capacitance current tester for neutral point ungrounded systems is proposed. Summary of the Invention

[0005] The technical problem to be solved by this invention is: how to solve the problem that the data collected by existing capacitance current testers are greatly affected by the environment and are prone to large errors, and the safety is not high enough, which has brought certain impacts to the use of capacitance current testers. The invention provides a fully automatic capacitance current tester for neutral point ungrounded systems.

[0006] The present invention solves the above-mentioned technical problems through the following technical solutions. The present invention includes a tester body, a first test module, a second test module, a third test module, a fourth test module, a vibration acquisition module, a usage information acquisition module, a grounding post acquisition module, a bottom surface force acquisition module, a bottom surface environment acquisition module, a distance measuring module, and a display information acquisition module.

[0007] The tester body performs capacitance current testing through a set first test module, a second test module, a third test module, and a fourth test module. The first test module, the second test module, the third test module, and the fourth test module use different test methods to perform capacitance current testing and obtain the first test result, the second test result, the third test result, and the fourth test result. The tester body processes the first test result, the second test result, the third test result, and the fourth test result to obtain the final exported test result.

[0008] The grounding post acquisition module is used to collect the status information of the grounding post on the tester body. The grounding post status information includes the grounding post life information and the grounding post maintenance number information.

[0009] The bottom force module is used to collect information on the magnitude of the force on the bottom surface of the test instrument body during use;

[0010] The bottom surface environment acquisition module is used to collect environmental status information of the bottom surface of the test instrument body when it is in use. The environmental status information includes water accumulation information and dust accumulation information.

[0011] The vibration acquisition module is used to collect vibration information of the test instrument body during use and transportation, that is, vibration information during use and vibration information during transportation.

[0012] The ranging module is used to collect distance information between other testing devices and this device during the operation of the test instrument, and to obtain device spacing information;

[0013] The usage information collection module is used to record the user information of the test instrument body each time it is used, as well as the status information of the device before and after use.

[0014] The processing module in the main body of the tester processes the grounding stake status information, the environmental status information of the bottom surface, the force magnitude information of the bottom surface, the vibration information during use, the vibration information during transportation, the equipment spacing information, the status information of the equipment before use, and the status information after use to obtain grounding warning information, environmental warning information, test abnormality information, equipment replacement information, and equipment maintenance allocation information.

[0015] Furthermore, the specific process by which the testing instrument processes the first test result, the second test result, the third test result, and the fourth test result to obtain the final derived test result is as follows:

[0016] Step 1: Extract the first test result, the second test result, the third test result, and the fourth test result, and label them K1, K2, K3, and K3 respectively;

[0017] Step 2: Calculate the difference between K1 and K2 (Kk1), the difference between K1 and K3 (Kk2), the difference between K1 and K4 (Kk3), the difference between K2 and K3 (Kk4), the difference between K2 and K4 (Kk5), and the difference between K3 and K4 (Kk6).

[0018] Step 3: When any one of Kk1, Kk2, Kk3, Kk4, Kk5, and Kk6 is greater than the preset value A1, or at least two of them are greater than the preset value A2, it indicates that the test result deviation is too large. When all of Kk1, Kk2, Kk3, Kk4, Kk5, and Kk6 are less than the preset value, it indicates that the test data is usable. The first test result, the second test result, the third test result, and the fourth test result are collected and exported in the order of collection time, and displayed side by side on the display screen of the automatic capacitance current tester, with A1 > A2.

[0019] Furthermore, the specific processing procedure for the grounding warning information is as follows: extract the collected grounding post status information, extract the grounding post lifespan information and grounding post maintenance count information from the grounding post status information, and generate grounding warning information when the grounding post lifespan information is less than a preset value and the grounding post maintenance count information is less than a preset value.

[0020] Furthermore, the specific processing procedure for the test anomaly information and equipment replacement information is as follows:

[0021] S1: Extract the collected vibration information from usage, transportation, and equipment spacing. Mark the vibration information from usage as W, the vibration information from transportation as Y, and the equipment spacing information as H.

[0022] S2: When the vibration information W is greater than the preset value B1 or continuously greater than the preset value B2, test abnormality information is generated. When the vibration information is greater than B3, equipment replacement information is generated. B3 > B1 > B2.

[0023] S3: When the transportation vibration information Y is greater than the preset value C1 or continuously greater than the preset value C2, test abnormality information is generated. When the transportation vibration information Y is greater than C3, equipment replacement information is generated. When the transportation vibration information Y is continuously greater than C1, equipment replacement information is also generated. C3 > C1 > C2.

[0024] S4: When the device spacing information H is less than the preset distance, test anomaly information is generated;

[0025] S5: When the force on the bottom surface of the tester body exceeds the preset value during use, test abnormality information is generated.

[0026] Furthermore, the specific processing procedure for the equipment maintenance allocation information is as follows: extract the status information before and after the use of the equipment. The status information before the use of the equipment includes whether the equipment is normal or damaged before use. The status information after the use of the equipment includes whether the equipment is normal or damaged after use. When the status information before the use of the equipment is that the equipment is damaged before use, the equipment maintenance allocation information is directly generated. When the status information before the use of the equipment is that the equipment is normal before use, but the status information after the use of the equipment is that the equipment is damaged after use, the equipment maintenance allocation information is also generated.

[0027] Furthermore, after the equipment maintenance allocation information is generated, maintenance personnel are allocated. When allocating personnel, the last recorded personnel is extracted from the user information of each use of the test instrument body recorded by the usage information collection module as the assigned personnel.

[0028] Furthermore, the processing module in the tester body also processes the display information collected by the display information acquisition module to generate display abnormality warning information. The specific processing process of the display abnormality warning information is as follows: the display information includes display brightness and display area. When the display area is smaller than the preset display area or the display brightness is smaller than the preset brightness for a preset time, display abnormality warning information is generated.

[0029] Furthermore, the specific processing procedure for the environmental warning information is as follows: extract the environmental status information of the bottom surface, and obtain the water accumulation information and dust accumulation information from the environmental status information. When either the water accumulation information or the dust accumulation information is greater than a preset value, environmental warning information is generated.

[0030] Compared with existing technologies, this invention has the following advantages: The fully automatic capacitance current tester for neutral point ungrounded systems undergoes status monitoring during use and transportation. When subjected to abnormal vibration, it promptly generates corresponding warning messages, alerting users that environmental factors or equipment damage may affect the test results. This significantly reduces the likelihood of equipment-related issues influencing test results. Furthermore, the tester employs multiple testing methods for capacitance current testing, comprehensively analyzing various results to determine accuracy, effectively improving the accuracy of the test results. This greatly enhances testing efficiency, ensures smooth operation, and the multiple warning messages significantly improve testing safety, making this system more worthy of widespread adoption. Attached Figure Description

[0031] Figure 1 This is a block diagram of the tester structure of the present invention;

[0032] Figure 2This is a schematic diagram of the neutral point external capacitance method test principle of the present invention;

[0033] Figure 3 This is a schematic diagram of the resonance method testing principle of the present invention;

[0034] Figure 4 This is the invention Figure 3 A simplified equivalent schematic diagram;

[0035] Figure 5 This is a circuit diagram of the tester of the present invention. Detailed Implementation

[0036] The embodiments of the present invention are described in detail below. These embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments.

[0037] like Figure 1-5 As shown, this embodiment provides a technical solution: a fully automatic capacitance current tester for a neutral point ungrounded system, including a tester body, a first test module, a second test module, a third test module, a fourth test module, a vibration acquisition module, a usage information acquisition module, a grounding post acquisition module, a bottom surface force acquisition module, a bottom surface environment acquisition module, a distance measuring module, and a display information acquisition module;

[0038] The tester body performs capacitance current testing through a set first test module, a second test module, a third test module, and a fourth test module. The first test module, the second test module, the third test module, and the fourth test module use different test methods to perform capacitance current testing and obtain the first test result, the second test result, the third test result, and the fourth test result. The tester body processes the first test result, the second test result, the third test result, and the fourth test result to obtain the final exported test result.

[0039] The first test module uses the direct method, i.e., the single-phase metallic grounding method, the second test module uses the neutral point external capacitance method, the third test module uses the neutral point external voltage method, and the fourth test module uses the resonance method.

[0040] The specific process of the neutral point external capacitor method is as follows: The equivalent circuit diagram for the neutral point external capacitor method measurement is shown below. Figure 2 As shown in the figure, N is the neutral point of the power grid, which represents the unbalanced voltage of the system. This voltage is very low in cable lines; in overhead power grids of 60kV and below, it is generally 100-300V.

[0041] When an external capacitor C is connected to the neutral point N of the power grid, the neutral point voltage changes from U... N The voltage that changes to UN' is called displacement voltage.

[0042]

[0043] Grid capacitor current

[0044] Ic = U p ωC x (2)

[0045] In the formula, Cx is the system capacitance; Up is the phase voltage.

[0046] It is clear from the above formula that the external capacitor has a significant impact on the accuracy of the measurement results. If the capacitor is chosen appropriately, the measurement results will be accurate; otherwise, the measurement error will be large. There are two ways to reduce the error: one is to estimate the capacitance value Cx based on the power grid, select multiple sets of capacitance values ​​between 1 / 3 and 3Cx, and calculate the average value. Of course, the rated voltage of the capacitor should not be lower than the phase voltage of the system; the other is to select C1 and C2, and measure U respectively. N1 '、U N2 Cx can be calculated using equation (5). Of course, for accurate measurement, the selected capacitance value is on the same order of magnitude as Cx.

[0047]

[0048] Given the relatively low asymmetrical voltage in the cable line, a higher asymmetrical voltage value is required to improve the measurement accuracy of the system capacitance. A bias capacitor Cp can be added to any phase. This bias capacitor should ideally be on the same order of magnitude as the system capacitance. Other measurements are the same as described above. To make the measurement results more consistent with reality, bias capacitors can be added to the other two phases separately for measurement, and then the average value can be taken. It should be noted that the actual capacitance in this case is the measured value minus the added capacitor Cp.

[0049] The neutral point external capacitor method has the following advantages:

[0050] a. It will not affect the normal operation of the system.

[0051] b. The testing method is safe, reliable, and highly accurate.

[0052] c. It facilitates operators' practical understanding of the tap adjustment of the arc suppression coil.

[0053] The specific process of the resonance method is as follows:

[0054] The resonance method utilizes parameters such as compensation current and neutral point displacement voltage when the arc suppression coil is tuned or at different frequencies to calculate the network's capacitive current. The schematic diagram is shown below. Figure 3 As shown

[0055] The principle of equivalent generator can be used to... Figure 3 Simplified to Figure 4 .

[0056]

[0057]

[0058] In the formula, E0 is the system unbalance voltage measured when the arc suppression coil is disconnected; U0 is the neutral point displacement voltage measured when the arc suppression coil is at each tap; Xc is the system equivalent capacitive reactance; I is the current flowing through the arc suppression coil; and U AB The voltage between specified points A and B.

[0059] For a graded arc suppression coil, by measuring the neutral point displacement voltage, the current flowing through the arc suppression coil, the line voltage and the phase voltage at different taps, the equivalent capacitive reactance of the system can be solved, and then the capacitive current can be easily obtained.

[0060] The grounding post acquisition module is used to collect the status information of the grounding posts on the tester body. The grounding post status information includes the grounding post lifespan information and the grounding post maintenance count information.

[0061] The bottom force module is used to collect information on the magnitude of the force on the bottom surface of the test instrument body during use;

[0062] The bottom surface environment acquisition module is used to collect environmental status information of the bottom surface of the test instrument body when it is in use. The environmental status information includes water accumulation information and dust accumulation information.

[0063] The vibration acquisition module is used to collect vibration information of the test instrument body during use and transportation, that is, vibration information during use and vibration information during transportation.

[0064] The ranging module is used to collect distance information between other testing devices and this device during the operation of the test instrument, and to obtain device spacing information;

[0065] The usage information collection module is used to record the user information of the test instrument body each time it is used, as well as the status information of the device before and after use.

[0066] The processing module in the main body of the tester processes the grounding stake status information, the environmental status information of the bottom surface, the force magnitude information of the bottom surface, the vibration information during use, the vibration information during transportation, the equipment spacing information, the status information of the equipment before use, and the status information after use to obtain grounding warning information, environmental warning information, test abnormality information, equipment replacement information, and equipment maintenance allocation information.

[0067] like Figure 5As shown, the transformer is electrically connected to a 22V circuit. A switch K is installed on the circuit, and capacitors C1, C2, L1, and L2 are connected in parallel. The current shift sampling unit is electrically connected to both C1 and the amplifier. The amplifier OP07 is electrically connected to the gear shift switch, which is also electrically connected to another amplifier TLo8. The amplifier TLo8 is electrically connected to the phase detector. The phase detector outputs a phase difference signal to the CPU, and the CPU performs automatic gear shifting control.

[0068] This tester has sampling circuits in the capacitor branch under test to sample the voltage and current of the capacitor. The outputs of the sampling circuits are connected to amplifier circuits. The voltage signal from the voltage amplifier circuit and the current signal from the current amplifier circuit are passed through a phase detector to output a phase difference signal. This phase difference signal, along with the voltage and current signals, is then processed by an A / D converter and input to the CPU to calculate the value of the capacitor under test. Because it uses a moving current sampling unit, the capacitance value can be measured directly without disconnecting the connecting wires. In addition, the measurement range is automatically selected, avoiding errors caused by manual operation. Therefore, it has the characteristics of good stability, good repeatability, accuracy, and reliability.

[0069] The specific process by which the testing instrument processes the first, second, third, and fourth test results to obtain the final exported test result is as follows:

[0070] Step 1: Extract the first test result, the second test result, the third test result, and the fourth test result, and label them K1, K2, K3, and K3 respectively;

[0071] Step 2: Calculate the difference between K1 and K2 (Kk1), the difference between K1 and K3 (Kk2), the difference between K1 and K4 (Kk3), the difference between K2 and K3 (Kk4), the difference between K2 and K4 (Kk5), and the difference between K3 and K4 (Kk6).

[0072] Step 3: When any one of Kk1, Kk2, Kk3, Kk4, Kk5, and Kk6 is greater than the preset value A1, or at least two of them are greater than the preset value A2, it indicates that the test result deviation is too large. When all of Kk1, Kk2, Kk3, Kk4, Kk5, and Kk6 are less than the preset value, it indicates that the test data is usable. The first test result, the second test result, the third test result, and the fourth test result are collected and exported in the order of collection time, and displayed side by side on the display screen of the automatic capacitance current tester, with A1 > A2.

[0073] Through the above process, more accurate capacitance current testing was achieved, ensuring the accuracy of the test results and reducing test errors.

[0074] The specific processing procedure for the grounding warning information is as follows: extract the collected grounding post status information, extract the grounding post lifespan information and grounding post maintenance count information from the grounding post status information, and generate grounding warning information when the grounding post lifespan information is less than a preset value and the grounding post maintenance count information is less than a preset value.

[0075] Through the above process, the status analysis of the grounding equipment of the capacitance current tester is realized, thereby understanding whether its quality is safe and reliable. When an abnormality is found in the grounding equipment status of the capacitance current tester, a warning message is issued in a timely manner to ensure the safety of users when conducting capacitance current tests.

[0076] The specific processing procedure for the test anomaly information and equipment replacement information is as follows:

[0077] S1: Extract the collected vibration information from usage, transportation, and equipment spacing. Mark the vibration information from usage as W, the vibration information from transportation as Y, and the equipment spacing information as H.

[0078] S2: When the vibration information W is greater than the preset value B1 or continuously greater than the preset value B2, test abnormality information is generated. When the vibration information is greater than B3, equipment replacement information is generated. B3 > B1 > B2.

[0079] S3: When the transportation vibration information Y is greater than the preset value C1 or continuously greater than the preset value C2, test abnormality information is generated. When the transportation vibration information Y is greater than C3, equipment replacement information is generated. When the transportation vibration information Y is continuously greater than C1, equipment replacement information is also generated. C3 > C1 > C2.

[0080] S4: When the device spacing information H is less than the preset distance, test anomaly information is generated;

[0081] S5: When the force on the bottom surface of the tester body exceeds the preset value during use, test abnormality information is generated;

[0082] Through the above process, when the tester receives abnormal vibration images during the test, it issues an alarm message to remind the user, thereby reducing the large deviation of the collected data caused by blindly collecting data when the environment is abnormal. At the same time, when the tester receives excessive vibration during transportation that may damage the instrument, it can promptly issue an alarm message to remind the user to replace the tester, avoiding the situation where the tester damage is not detected in time and affects the testing progress, and also achieving the purpose of speeding up the testing efficiency.

[0083] The specific processing procedure for the equipment maintenance allocation information is as follows: Extract the status information before and after the use of the equipment. The status information before the use of the equipment includes whether the equipment is normal or damaged before use. The status information after the use of the equipment includes whether the equipment is normal or damaged after use. When the status information before the use of the equipment is that the equipment is damaged before use, the equipment maintenance allocation information is directly generated. When the status information before the use of the equipment is that the equipment is normal before use, but the status information after the use of the equipment is that the equipment is damaged after use, the equipment maintenance allocation information is generated.

[0084] Through the above process, personnel can be promptly assigned to repair and maintain the detector when it malfunctions, thus extending its service life.

[0085] After the equipment maintenance allocation information is generated, maintenance personnel are allocated. When allocating personnel, the last recorded personnel is extracted from the user information of each use of the test instrument body recorded by the usage information collection module and is the assigned personnel.

[0086] Through the above process, a more reasonable allocation of maintenance personnel was achieved, and the speed of maintenance was accelerated.

[0087] The processing module in the main body of the tester also processes the display information collected by the display information acquisition module to generate display abnormality warning information. The specific processing process of the display abnormality warning information is as follows: the display information includes display brightness and display area. When the display area is smaller than the preset display area or the display brightness is smaller than the preset brightness for a preset time, the display abnormality warning information is generated.

[0088] Through the above process, the display screen of the detector is monitored. When the display screen of the detector is abnormal, a warning message is issued in time, thereby avoiding the situation where the display screen is damaged and the data cannot be read after the test.

[0089] The specific processing procedure for the environmental warning information is as follows: extract the environmental status information of the bottom surface, and obtain the water accumulation information and dust accumulation information from the environmental status information. When either the water accumulation information or the dust accumulation information is greater than a preset value, environmental warning information is generated.

[0090] Through the above process, timely warnings are provided under abnormal environmental conditions, preventing situations where water or dust accumulation on the site affects the operation of the detector or causes damage to the detector.

[0091] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0092] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0093] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A fully automatic capacitance current tester for neutral point ungrounded systems, characterized in that, It includes the tester body, a first test module, a second test module, a third test module, a fourth test module, a vibration acquisition module, a usage information acquisition module, a grounding post acquisition module, a bottom surface force acquisition module, a bottom surface environment acquisition module, a distance measuring module, and a display information acquisition module; The tester body performs capacitance current testing through a set first test module, a second test module, a third test module, and a fourth test module. The first test module, the second test module, the third test module, and the fourth test module use different test methods to perform capacitance current testing and obtain the first test result, the second test result, the third test result, and the fourth test result. The tester body processes the first test result, the second test result, the third test result, and the fourth test result to obtain the final exported test result. The grounding post acquisition module is used to collect the status information of the grounding posts on the tester body. The grounding post status information includes the grounding post lifespan information and the grounding post maintenance count information. The bottom surface force acquisition module is used to collect information on the magnitude of the force on the bottom surface of the test instrument body during use; The bottom surface environment acquisition module is used to collect environmental status information of the bottom surface of the test instrument body when it is in use. The environmental status information includes water accumulation information and dust accumulation information. The vibration acquisition module is used to collect vibration information of the test instrument body during use and transportation, that is, vibration information during use and vibration information during transportation. The ranging module is used to collect distance information between other testing devices and this device during the operation of the test instrument, and to obtain device spacing information; The usage information collection module is used to record the user information of the test instrument body each time it is used, as well as the status information of the device before and after use. The processing module in the main body of the tester processes the grounding stake status information, the environmental status information of the bottom surface, the force magnitude information of the bottom surface, the vibration information during use, the vibration information during transportation, the equipment spacing information, the status information of the equipment before use, and the status information after use to obtain grounding warning information, environmental warning information, test abnormality information, equipment replacement information, and equipment maintenance allocation information.

2. The fully automatic capacitance current tester for a neutral point ungrounded system according to claim 1, characterized in that: The specific process by which the testing instrument processes the first, second, third, and fourth test results to obtain the final exported test result is as follows: Step 1: Extract the first test result, the second test result, the third test result, and the fourth test result, and label them K1, K2, K3, and K3 respectively; Step 2: Calculate the difference between K1 and K2 (Kk1), the difference between K1 and K3 (Kk2), the difference between K1 and K4 (Kk3), the difference between K2 and K3 (Kk4), the difference between K2 and K4 (Kk5), and the difference between K3 and K4 (Kk6). Step 3: When any one of Kk1, Kk2, Kk3, Kk4, Kk5, and Kk6 is greater than the preset value A1, or at least two of them are greater than the preset value A2, it indicates that the test result deviation is too large. When all of Kk1, Kk2, Kk3, Kk4, Kk5, and Kk6 are less than the preset value, it indicates that the test data is usable. The first test result, the second test result, the third test result, and the fourth test result are collected and exported in the order of collection time, and displayed side by side on the display screen of the automatic capacitance current tester, with A1 > A2.

3. The fully automatic capacitance current tester for a neutral point ungrounded system according to claim 1, characterized in that: The specific processing procedure for the grounding warning information is as follows: extract the collected grounding post status information, extract the grounding post lifespan information and grounding post maintenance count information from the grounding post status information, and generate grounding warning information when the grounding post lifespan information is less than a preset value and the grounding post maintenance count information is less than a preset value.

4. The fully automatic capacitance current tester for a neutral point ungrounded system according to claim 1, characterized in that: The specific processing procedure for the test anomaly information and equipment replacement information is as follows: S1: Extract the collected vibration information from usage, transportation, and equipment spacing. Mark the vibration information from usage as W, the vibration information from transportation as Y, and the equipment spacing information as H. S2: When the vibration information W is greater than the preset value B1 or continuously greater than the preset value B2, test abnormality information is generated. When the vibration information is greater than B3, equipment replacement information is generated. B3 > B1 > B2. S3: When the transportation vibration information Y is greater than the preset value C1 or continuously greater than the preset value C2, test abnormality information is generated. When the transportation vibration information Y is greater than C3, equipment replacement information is generated. When the transportation vibration information Y is continuously greater than C1, equipment replacement information is also generated. C3 > C1 > C2. S4: When the device spacing information H is less than the preset distance, test anomaly information is generated; S5: When the force on the bottom surface of the tester body exceeds the preset value during use, test abnormality information is generated.

5. The fully automatic capacitance current tester for a neutral point ungrounded system according to claim 1, characterized in that: The specific processing procedure for the equipment maintenance allocation information is as follows: Extract the status information before and after the use of the equipment. The status information before the use of the equipment includes whether the equipment is normal or damaged before use. The status information after the use of the equipment includes whether the equipment is normal or damaged after use. When the status information before the use of the equipment is that the equipment is damaged before use, the equipment maintenance allocation information is generated directly. When the status information before the use of the equipment is that the equipment is normal before use, but the status information after the use of the equipment is that the equipment is damaged after use, the equipment maintenance allocation information is generated.

6. A fully automatic capacitance current tester for a neutral point ungrounded system according to claim 5, characterized in that: After the equipment maintenance allocation information is generated, maintenance personnel are allocated. When allocating personnel, the last recorded personnel is extracted from the user information of each use of the test instrument body recorded by the usage information collection module.

7. A fully automatic capacitance current tester for a neutral point ungrounded system according to claim 1, characterized in that: The processing module in the main body of the tester also processes the display information collected by the display information acquisition module to generate display abnormality warning information. The specific processing process of the display abnormality warning information is as follows: the display information includes display brightness and display area. When the display area is smaller than the preset display area or the display brightness is smaller than the preset brightness for a preset time, the display abnormality warning information is generated.

8. A fully automatic capacitance current tester for a neutral point ungrounded system according to claim 1, characterized in that: The specific processing procedure for the environmental warning information is as follows: extract the environmental status information of the bottom surface, and obtain the water accumulation information and dust accumulation information from the environmental status information. When either the water accumulation information or the dust accumulation information is greater than a preset value, an environmental warning information is generated.

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