Method and system for testing electromechanical comprehensive performance of insulating rod

Abstract

The invention relates to an insulating rod electromechanical comprehensive performance test method and system, and relates to the technical field of insulating rods. Searching a feed distance from a preset feed database based on the extension length number; preset bending operation is carried out based on the feeding distance, and a leakage current curve and a feedback torque curve are obtained in the bending operation process; obtaining the maximum leakage current based on the leakage current curve; obtaining an abrupt change torque value based on the feedback torque curve; when the maximum leakage current is smaller than a preset leakage current threshold value and the abrupt change torque value does not exist, outputting a performance qualified signal; and when the maximum leakage current is greater than a preset leakage current threshold value or the abrupt change torsion value exists, outputting a performance disqualification signal. The device has the effect of synchronously measuring the electromechanical performance of the insulating rod.

Description

Technical Field

[0001] This invention relates to the field of insulating rod technology, and in particular to a method and system for testing the electromechanical performance of insulating rods. Background Technology

[0002] Insulating poles are core insulating safety tools for live-line work and equipment maintenance in power systems. The insulating body of insulating poles is mostly made of fiberglass epoxy resin and is formed by manual rolling or mechanical pultrusion. According to the structural form, they can be divided into interface type and telescopic type to adapt to the operational needs of different work scenarios.

[0003] In related technologies, the performance testing of insulating rods often adopts a comprehensive testing system with electrical and mechanical performance as the core. The electrical performance is based on the power frequency withstand voltage test to determine whether there is breakdown, flashover, etc., while the mechanical performance is often monitored by the three-point bending test to monitor the degree of bending resistance.

[0004] Regarding the aforementioned technologies, electrical and mechanical performance tests of insulating rods are usually conducted separately, lacking simultaneous and comprehensive testing methods for electromechanical performance, making it difficult to fully evaluate the overall performance of insulating rods under actual working conditions. Summary of the Invention

[0005] In order to simultaneously measure the electromechanical performance of insulating rods, this invention provides a method and system for testing the comprehensive electromechanical performance of insulating rods.

[0006] In a first aspect, the present invention provides a method for testing the comprehensive electromechanical performance of an insulating rod, employing the following technical solution: A method for testing the comprehensive electromechanical performance of an insulating rod includes: Step S1: Obtain the extension length number; Step S2: Find the feed distance from the preset feed database based on the extension length number; Step S3: Perform a preset bending operation based on the feed distance, and obtain the leakage current curve and feedback torque curve during the bending operation; Step S4: Obtain the maximum leakage current based on the leakage current curve; Step S5: Obtain the sudden torque value based on the feedback torque curve; Step S6: When the maximum leakage current is less than the preset leakage current threshold and there is no sudden torque value, output a performance qualified signal; Step S7: When the maximum leakage current exceeds the preset leakage current threshold or a sudden torque value exists, output a performance failure signal.

[0007] By adopting the above technical solution, the parameters of the bending operation can be precisely controlled by obtaining the extension length number and finding the corresponding feed distance. During the bending operation, the leakage current curve and feedback torque curve can be obtained in real time, and the maximum leakage current and sudden torque value can be obtained respectively. When the maximum leakage current is less than the preset leakage current threshold and the sudden torque value does not exist, it indicates that the electromechanical performance of the insulating rod meets the requirements, and a performance qualified signal is output. Otherwise, a performance unqualified signal is output so that the insulating rod can be repaired or replaced in time.

[0008] Optionally, the method for outputting a performance failure signal when the maximum leakage current exceeds a preset leakage current threshold or a sudden torque value exists also includes: Step S70: Obtain an image of the insulating rod; Step S71: Identify and analyze the image of the insulating rod to determine the location of the impurities; Step S72: Remove the impurities based on their location and obtain the removal leakage current; Step S73: When the leakage current is less than the preset leakage current threshold, output a performance qualified signal; Step S74: When the leakage current exceeds the preset leakage current threshold, output a performance failure signal.

[0009] By adopting the above technical solution, when the initial test of the insulating rod fails, image recognition technology can be used to locate and remove surface impurities before retesting the electrical performance. This can effectively eliminate misjudgments caused by surface contamination and improve the accuracy of the test.

[0010] Optionally, the method also includes a specific method for identifying and analyzing images of insulating rods to determine the location of impurities, the method further including: Step S710: Based on the image of the insulating rod, obtain the current foreign object information and the current impurity position corresponding to the current foreign object information, and define the current impurity position as the impurity position; Step S711: When there is no foreign object information, analyze the image of the insulating rod to obtain the extension length scale; Step S712: Determine the non-extended length scale based on the extended length scale; Step S713: Determine the corresponding numbers of other extended lengths based on the non-extended length scale; Step S714: Select another extension length number and extend until the current foreign object information is present on the image of the insulating rod corresponding to the other extension length number.

[0011] By adopting the above technical solution, if no foreign objects are found in the current insulating rod section, the length of the extended insulating rod can be used to determine and drive the other non-extended parts to extend based on the scale information, so as to check the surface condition of the entire insulating rod section by section, ensuring the comprehensiveness of impurity location and avoiding omissions.

[0012] Optionally, the method for clearing the output performance failure signal when the leakage current exceeds a preset leakage current threshold also includes: Step S740: Traverse all protrusion length numbers, find all impurity locations and remove them, and obtain the complete removal leakage current; Step S741: When the leakage current is greater than the preset leakage current threshold after complete elimination, output a performance failure signal.

[0013] By adopting the above technical solution, a comprehensive surface inspection and impurity removal are carried out on all possible protruding sections of the insulating rod, and electrical testing is conducted again after completely eliminating the influence of surface contamination.

[0014] Optionally, the method for clearing the output performance failure signal when the leakage current exceeds a preset leakage current threshold also includes: Step S7410: Obtain the partial discharge measurement points based on the extension length number; Step S7411: Perform partial discharge measurement based on the partial discharge measurement point and obtain the partial discharge quantity; Step S7412: If the partial discharge amount is not present, reselect the extension length number and repeat steps S7410 to S7411; Step S7413: When the partial discharge quantity is greater than the preset partial discharge quantity threshold, output a non-conductive defect signal; Step S7414: When traversing the extension length number and the partial discharge quantity is absent, output a performance failure signal.

[0015] By employing the above technical solution, after eliminating surface factors, partial discharge detection is performed on each segment of the insulating rod to locate potential internal insulation defects (such as bubbles, cracks, etc.). If partial discharge is detected, the location of non-conductive defects can be identified; if no partial discharge is found after traversing all segments, but leakage current still exceeds the standard, the overall performance is judged to be unqualified, which may involve material aging or other global problems.

[0016] Optionally, the method for outputting a non-conductive defect signal when the partial discharge quantity exceeds a preset partial discharge quantity threshold also includes: Step S74130: Obtain the center measurement point based on the partial discharge measurement point; Step S74131: Perform partial discharge measurement based on the partial discharge measurement point and the center measurement point to obtain the first partial discharge quantity and the second partial discharge quantity; Step S74132: Define the non-zero discharge quantity in the first partial discharge quantity and the second partial discharge quantity as the defect discharge quantity. Step S74133: Obtain the defect measurement point and the defect center measurement point based on the partial discharge measurement point and the center measurement point corresponding to the defect discharge quantity; Step S74134: Repeat steps S74131 to S74132 based on the defect measurement point and the defect center measurement point until both the first partial discharge quantity and the second partial discharge quantity are not 0. Then, output the corresponding defect measurement point and non-conductive defect signal.

[0017] By adopting the above technical solution, within the section where partial discharge is initially discovered, by continuously determining new measurement points and center points and comparing the partial discharge amounts of the two, the range of the defect can be gradually narrowed down, and finally the defect point with the strongest partial discharge signal can be accurately located, thus improving the accuracy and efficiency of defect location.

[0018] Optional, also includes: Step S74135: When both the first partial discharge quantity and the second partial discharge quantity are not 0, obtain the first measurement point and the second measurement point based on the defect measurement point; Step S74136: Update the first measurement point based on the first measurement point and the second measurement point, and obtain the updated first partial discharge quantity; Step S74137: When the updated first partial discharge quantity is less than the partial discharge quantity, define the first measurement point at this time as the final first measurement point; Step S74138: Update the second measurement point based on the first measurement point and the second measurement point, and obtain the updated second partial discharge quantity; Step S74139: When the updated second partial discharge quantity is less than the partial discharge quantity, define the second measurement point at this time as the final second measurement point; Step S74140: Output a non-conductive defect signal based on the final first measurement point and the final second measurement point.

[0019] By adopting the above technical solution, after the approximate area of ​​the defect has been located, further refined moving measurements are performed on both sides of the defect point. By judging the increase or decrease of the discharge quantity, the left and right boundaries of the defect area (the final first measurement point and the final second measurement point) can be defined more accurately. Thus, not only the defect point can be given, but also the distribution range of the defect along the axial direction can be evaluated.

[0020] Optional, also includes: Step S74141: Update the final first measurement point based on the final first measurement point and the final second measurement point and obtain the partial discharge change; Step S74142: When the partial discharge change is 0, define the final first measurement point at this time as the first intact point, and continue to update the final first measurement point; Step S74143: When the partial discharge change is no longer 0, define the final first measurement point at this time as the second intact point. Until the final first measurement point is updated to the final second measurement point, output all the found intact points, the final first measurement point, the final second measurement point and the non-conductive defect signal together.

[0021] By adopting the above technical solution, after determining the boundary of the defect area, scanning is performed from one boundary point to the other boundary point, recording the points where the discharge quantity changes from zero to present or from present to zero, thus clearly depicting the boundary between the defect area and the intact area, thereby more completely characterizing the distribution of defects on the insulating rod.

[0022] Optionally, methods for obtaining leakage current curves include: Step S30: Obtain stray current before bending; Step S31: During bending, obtain the real-time leakage current; Step S32: Calculate the actual leakage current based on stray current and real-time leakage current; Step S33: Obtain the leakage current curve based on the actual leakage current.

[0023] By adopting the above technical solution, the environmental stray current is measured and recorded before the bending test. During the pressure test, the measured real-time total leakage current is subtracted from the pre-acquired stray current to obtain the true leakage current of the insulating rod itself. This method eliminates the influence of environmental electromagnetic interference on the measurement of weak leakage current, significantly improving the accuracy and reliability of electrical performance test data.

[0024] Secondly, this invention provides a comprehensive electromechanical performance testing system for insulating rods, employing the following technical solution: An electromechanical performance testing system for insulating rods includes: The acquisition module is used to collect the extension length number; A memory for storing the program of the electromechanical comprehensive performance test method for an insulating rod as described above; The processor loads and executes programs from memory.

[0025] By adopting the above technical solution, the acquisition module can accurately collect the extension length number of the insulating rod, while the memory is responsible for storing the detailed and complete test program for the electromechanical comprehensive performance of the insulating rod, ensuring the standardization and normalization of the entire test process. The processor loads and executes the program in the memory, which can efficiently coordinate the execution of each step, accurately control the bending operation parameters, and acquire and process key data such as leakage current curves and feedback torque curves in real time, thereby achieving a comprehensive and accurate evaluation of the electromechanical performance of the insulating rod.

[0026] In summary, the present invention has at least one of the following beneficial technical effects: 1. It realizes the integrated testing of the electrical and mechanical properties of insulating rods, thereby comprehensively and accurately evaluating their overall performance and solving the problem that step-by-step testing cannot reflect the electromechanical coupling effect; 2. A multi-level progressive diagnostic process, from initial comprehensive testing to surface impurity identification and removal retesting, and then to internal defect localization, accurately distinguishes and locates faults of different natures, such as surface contamination and internal non-conductive defects. Attached Figure Description

[0027] Figure 1 This is a flowchart of a method for testing the electromechanical comprehensive performance of an insulating rod according to an embodiment of this application.

[0028] Figure 2 This is a schematic diagram of the bending process in an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of partial discharge measurement in an embodiment of this application.

[0030] Figure 4 This is a schematic diagram illustrating the optimization of partial discharge measurement in an embodiment of this application. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0032] This invention discloses a method for testing the comprehensive electromechanical performance of an insulating rod. (Refer to...) Figure 1 A test method for the comprehensive electromechanical performance of an insulating rod includes: Step S1: Obtain the extension length number.

[0033] The extension length number is a status code used to uniquely identify the current extension length of the insulating rod. Each number represents the current extension length of the insulating rod. For example, 01, 02, and 03 represent that the insulating rod has extended 10 cm, 20 cm, and 30 cm, respectively.

[0034] The method for obtaining the extension length number is that the staff pre-plans each extension length number and its corresponding extension length and inputs them into the system. Then, during work, the staff inputs the extension length number at that time.

[0035] Step S2: Find the feed distance from the preset feed database based on the extension length number.

[0036] The feed database refers to a database established by staff in advance by searching for the relevant attributes of the insulating rod and based on the extension length corresponding to the extension length number and the relevant attributes of the insulating rod. Each extension length number corresponds to a feed distance.

[0037] Reference Figure 2 The feed distance refers to the distance the insulating rod is bent when it is bent. The feed distance is obtained by the system searching the feed database based on the obtained extension length number.

[0038] Step S3: Perform a preset bending operation based on the feed distance, and obtain the leakage current curve and feedback torque curve during the bending operation.

[0039] The leakage current curve refers to the curve showing the change of leakage current on the surface of the insulating rod over time during the bending operation. This curve can intuitively reflect the change in the electrical insulation performance of the insulating rod under pressure. The leakage current is obtained by collecting the current signal on the surface of the insulating rod in real time through a current sensor, transmitting the collected signal to a data acquisition system, and plotting the leakage current curve over time after filtering, amplification, and other processing.

[0040] The feedback torque curve refers to the curve showing the change of feedback torque over time during the bending operation. This curve can intuitively reflect the changes in the mechanical properties of the insulating rod during the compression process. The feedback torque is obtained by using sensors to collect the torque experienced by the insulating rod during the bending process in real time and plotting the feedback torque curve over time.

[0041] Step S4: Obtain the maximum leakage current based on the leakage current curve.

[0042] The maximum leakage current refers to the maximum value of the leakage current recorded on the leakage current curve during the entire bending operation. The maximum leakage current is obtained by analyzing the leakage current curve data and comparing the leakage current values ​​at various time points on the curve to find the maximum value.

[0043] Step S5: Obtain the sudden torque value based on the feedback torque curve.

[0044] The sudden torque value refers to the value of torque that changes abruptly during the entire bending operation, as recorded on the feedback torque curve. The sudden torque value is obtained by analyzing the feedback torque curve and monitoring the rate of change of torque values ​​on the curve. When the rate of change exceeds a preset threshold, that point is identified as a torque sudden change point, and the corresponding torque value is recorded as the sudden torque value.

[0045] Step S6: When the maximum leakage current is less than the preset leakage current threshold and there is no sudden torque value, output a performance qualified signal.

[0046] When the maximum leakage current is less than the preset leakage current threshold, it indicates that the electrical insulation performance of the insulating rod is good, and there is no obvious leakage current exceeding the standard. The absence of abrupt torque values ​​indicates that the mechanical properties of the insulating rod are stable during compression, and there are no abnormal torque changes.

[0047] Step S7: When the maximum leakage current exceeds the preset leakage current threshold or a sudden torque value exists, output a performance failure signal.

[0048] When the maximum leakage current exceeds the preset leakage current threshold, it indicates that the electrical insulation performance of the insulating rod is poor. The presence of a sudden torque value indicates that the mechanical properties of the insulating rod are unstable during compression.

[0049] The method for outputting a performance failure signal when the maximum leakage current exceeds a preset leakage current threshold or a sudden torque value exists also includes: Step S70: Obtain an image of the insulating rod.

[0050] An insulating pole image refers to an image of the current state of an insulating pole captured by a camera. This image should clearly show the surface condition of the insulating pole. The insulating pole image is obtained by taking a picture with a camera.

[0051] Step S71: Identify and analyze the image of the insulating rod to determine the location of the impurities.

[0052] Impurity location refers to the specific location of impurities in the image of the insulating rod that affect its performance. The impurity location is obtained by the system preprocessing the image of the insulating rod (including color space conversion, filtering and noise reduction, and contrast enhancement), and identifying areas in the image with significant color differences, texture differences, or shape abnormalities compared to the clean insulating surface based on threshold segmentation and edge detection. These abnormalities are then identified as impurity areas, thus obtaining the impurity location.

[0053] Step S72: Remove the impurities based on their location and obtain the removal leakage current.

[0054] Leakage current removal refers to the leakage current obtained after removing impurities. The leakage current removal method involves real-time acquisition of the current signal from the surface of the insulating rod using a current sensor.

[0055] Step S73: When the leakage current is less than the preset leakage current threshold, output a performance qualified signal.

[0056] If the leakage current is less than the preset leakage current threshold, it indicates that the electrical insulation performance of the insulating rod after impurity removal is qualified.

[0057] Step S74: When the leakage current exceeds the preset leakage current threshold, output a performance failure signal.

[0058] If the leakage current exceeds the preset leakage current threshold, it indicates that the electrical insulation performance of the insulating rod is still unqualified after impurity removal.

[0059] This also includes a specific method for identifying and analyzing images of insulating rods to determine the location of impurities, and this method further includes: Step S710: Based on the image of the insulating rod, obtain the current foreign object information and the current impurity position corresponding to the current foreign object information, and define the current impurity position as the impurity position.

[0060] Current foreign object information refers to the specific feature information of impurities identified in the current image of the insulating rod, including but not limited to the shape, size, color, and texture of the impurities. This current foreign object information is obtained by the system using image recognition algorithms to extract and analyze features from the preprocessed image of the insulating rod.

[0061] The current impurity position refers to the position of the impurity identified in the current insulating rod image. The method for obtaining the current impurity position is the same as that for obtaining the impurity position in step S71, and will not be repeated here.

[0062] Step S711: When there is no foreign object information, analyze the image of the insulating rod to obtain the extension length scale.

[0063] If no foreign object information is currently available, it indicates that the impurity causing the insulation rod to fail to meet performance standards may be in the part of the insulation rod that does not extend outwards.

[0064] The extension length scale refers to the markings on the insulating rod used to indicate its extension length. These markings are usually in the form of scale lines, which can intuitively reflect the extension length of the insulating rod. The extension length scale is obtained by the system further analyzing the image of the insulating rod, identifying the scale line features in the image, and combining the known scale spacing and starting position to calculate the current extension length of the insulating rod, and then determining the extension length scale accordingly.

[0065] Step S712: Determine the non-extended length scale based on the extended length scale.

[0066] The non-extended length scale refers to the scale corresponding to the non-extended portion of the insulating rod. It is obtained by subtracting the currently determined extended length scale from the total length of the insulating rod. For example, if the total length of the insulating rod is 100 centimeters and it is divided into 10-centimeter scales, then when the insulating rod extends 30 centimeters, the non-extended length scale is the scale corresponding to the 70-centimeter scale line.

[0067] Step S713: Determine the corresponding number of other extended lengths based on the non-extended length scale.

[0068] Other extension length numbers refer to extension length numbers other than those corresponding to the extension portion of the insulating rod. The method for obtaining other extension length numbers is as follows: For example, if the total length of the insulating rod is 100 cm, and extension length numbers 01, 02, and 03 represent extensions of 10 cm, 20 cm, and 30 cm respectively, then when the insulating rod extends 30 cm, the other extension length number is the extension length number other than those numbered 01, 02, and 03, such as 04, 05, etc.

[0069] Step S714: Select another extension length number and extend until the current foreign object information is present on the image of the insulating rod corresponding to the other extension length number.

[0070] Select other extension length numbers and extend the rod. Perform image recognition on the part of the insulating rod where no foreign object was detected at the beginning until the current foreign object information is found.

[0071] The method for clearing a performance failure signal when the leakage current exceeds a preset leakage current threshold also includes: Step S740: Traverse all protrusion length numbers, find all impurity locations, remove them, and obtain the complete removal leakage current.

[0072] Completely eliminating leakage current refers to the leakage current obtained after traversing all extension length numbers and identifying and removing impurities from all parts of the insulating rod. The method for obtaining the completely eliminated leakage current is the same as the method for obtaining the eliminated leakage current in step S72, and will not be repeated here.

[0073] Step S741: When the leakage current is greater than the preset leakage current threshold after complete elimination, output a performance failure signal.

[0074] If the leakage current exceeds the preset leakage current threshold after all impurities have been removed, it indicates that the electrical performance of the insulating rod is still unqualified, and that the reason for the unqualified electrical performance of the insulating rod is unrelated to the impurities.

[0075] The method for clearing a performance failure signal when the leakage current exceeds a preset leakage current threshold also includes: Step S7410: Obtain the partial discharge measurement point based on the extension length number.

[0076] Reference Figure 3 Partial discharge measurement points refer to the points on the insulating rod where partial discharge is measured. These measurement points are obtained by determining the extended portion of the insulating rod based on its extension length number, and then using both ends of this extended portion as measurement points.

[0077] Step S7411: Perform partial discharge measurement based on the partial discharge measurement point and obtain the partial discharge quantity.

[0078] Partial discharge quantity refers to the electrical charge value of the partial discharge on an insulating rod measured at a partial discharge measurement point. The partial discharge quantity is obtained by using a partial discharge sensor to measure the insulating rod at a defined partial discharge measurement point, converting the partial discharge signal into a quantifiable electrical charge value, thus obtaining the partial discharge quantity.

[0079] Step S7412: If the partial discharge amount is not present, reselect the extension length number and repeat steps S7410 to S7411.

[0080] If the partial discharge quantity is not present, the extension length number is reselected for measurement to find the partial discharge quantity.

[0081] Step S7413: When the partial discharge quantity is greater than the preset partial discharge quantity threshold, output a non-conductive defect signal.

[0082] The partial discharge threshold is a standard value for determining whether an insulating rod has non-conductive defects. The partial discharge threshold is obtained by staff who have previously consulted relevant data about the insulating rod and then input it into the system.

[0083] When the partial discharge exceeds the preset partial discharge threshold, it indicates that the insulating rod has a non-conductive defect, such as internal cracks or cavities. This defect may be hidden in the internal structure of the insulating rod, thus affecting its electrical performance.

[0084] Step S7414: When traversing the extension length number and the partial discharge quantity is absent, output a performance failure signal.

[0085] When the extension length number is traversed and the partial discharge quantity is absent, it indicates that the electrical performance failure of the insulating rod is not caused by a non-conductive defect, but by the electrical performance failure of the insulating rod itself. Therefore, a performance failure signal is output.

[0086] The method for outputting a non-conductive defect signal when the partial discharge quantity exceeds a preset partial discharge quantity threshold also includes: Step S74130: Obtain the center measurement point based on the partial discharge measurement point.

[0087] Reference Figure 3 The center measurement point refers to the center point of the partial discharge measurement points. The center measurement point is obtained by calculating the coordinates of the midpoint between two partial discharge measurement points based on their location information.

[0088] Step S74131: Perform partial discharge measurement based on the partial discharge measurement point and the center measurement point to obtain the first partial discharge quantity and the second partial discharge quantity.

[0089] Reference Figure 3 Both the first and second partial discharge quantities refer to the partial discharge quantities measured between the partial discharge measurement point and the center measurement point, such as... Figure 3 As shown, the partial discharge quantity measured by the insulating rod between the partial discharge measurement point on the left and the center measurement point is the first partial discharge quantity, and the partial discharge quantity measured by the insulating rod between the partial discharge measurement point on the right and the center measurement point is the second partial discharge quantity.

[0090] The methods for obtaining the first and second partial discharge quantities are the same as those for obtaining the partial discharge quantity in step S7411, and will not be repeated here.

[0091] Step S74132: Define the non-zero discharge quantity in the first partial discharge quantity and the second partial discharge quantity as the defect discharge quantity.

[0092] Defect discharge quantity refers to the partial discharge quantity at locations on an insulating rod where defects such as cracks or cavities exist. For example... Figure 3 The fact that the first partial discharge quantity is not zero while the second partial discharge quantity is zero indicates that defects such as cracks and cavities exist in the left half of the insulating rod.

[0093] Step S74133: Obtain the defect measurement point and the defect center measurement point based on the partial discharge measurement point and the center measurement point corresponding to the defect discharge quantity.

[0094] Defect measurement points refer to the measurement points used to measure partial discharge in parts of insulating rods that are identified as defective.

[0095] The defect center measurement point refers to the center point of the defect measurement point.

[0096] like Figure 3 As shown, if the first partial discharge quantity is not zero while the second partial discharge quantity is zero, it indicates that defects such as cracks and cavities exist in the left half of the insulating rod, and the first partial discharge quantity is the defect discharge quantity. Therefore, the defect measurement point and the defect center measurement point are as follows: Figure 3 The same one is located on the left half of the insulating rod.

[0097] Step S74134: Repeat steps S74131 to S74132 based on the defect measurement point and the defect center measurement point until both the first partial discharge quantity and the second partial discharge quantity are not 0. Then, output the corresponding defect measurement point and non-conductive defect signal.

[0098] Based on the defect measurement point and the defect center measurement point, repeat steps S74131 to S74132 until both the first partial discharge quantity and the second partial discharge quantity are not 0. This indicates that the insulating rods located on both sides of the defect center measurement point have defects. Therefore, the part of the insulating rod with defects at this time is the part with defects in the measuring point.

[0099] This also includes: Step S74135: When both the first partial discharge quantity and the second partial discharge quantity are not 0, obtain the first measurement point and the second measurement point based on the defect measurement point.

[0100] like Figure 4 As shown, the first measurement point and the second measurement point refer to the two endpoints of the defect measurement point.

[0101] Step S74136: Update the first measurement point based on the first measurement point and the second measurement point, and obtain the updated first partial discharge quantity.

[0102] like Figure 4 As shown, updating the first measurement point based on the first measurement point and the second measurement point means moving the first measurement point toward the direction of the second measurement point.

[0103] The updated first partial discharge quantity refers to the partial discharge quantity measured by the insulating rod portion between the first measurement point and the second measurement point as the first measurement point moves towards the second measurement point. The method for obtaining the updated first partial discharge quantity is the same as the method for obtaining the partial discharge quantity, and will not be described in detail here.

[0104] Step S74137: When the updated first partial discharge quantity is less than the partial discharge quantity, the first measurement point at this time is defined as the final first measurement point.

[0105] like Figure 4 As shown, the final first measurement point refers to the point where the first measurement point finally stops when it moves towards the second measurement point. At this point, the updated first partial discharge quantity is less than the partial discharge quantity, indicating that the leftmost end of the defect is located at the final first measurement point.

[0106] Step S74138: Update the second measurement point based on the first measurement point and the second measurement point, and obtain the updated second partial discharge quantity.

[0107] like Figure 4 As shown, the updated second partial discharge quantity refers to the partial discharge quantity measured by the insulating rod portion between the second measurement point and the first measurement point when the second measurement point moves towards the first measurement point. The method for obtaining the updated second partial discharge quantity is the same as the method for obtaining the partial discharge quantity, and will not be described in detail here.

[0108] Step S74139: When the updated second partial discharge quantity is less than the partial discharge quantity, the second measurement point at this time is defined as the final second measurement point.

[0109] like Figure 4 As shown, the final second measurement point refers to the point where the second measurement point finally stops when it moves towards the first measurement point. At this point, the updated second partial discharge quantity is less than the partial discharge quantity, indicating that the rightmost end of the defect is located at the final second measurement point.

[0110] Step S74140: Output a non-conductive defect signal based on the final first measurement point and the final second measurement point.

[0111] Non-conductive defect signals refer to signals indicating the presence of non-conductive defects such as cracks or cavities inside the insulating rod.

[0112] By taking the final first measurement point and the final second measurement point as the two ends of the defect section, a non-conductive defect signal is output.

[0113] This also includes: Step S74141: Update the final first measurement point based on the final first measurement point and the final second measurement point and obtain the partial discharge change.

[0114] like Figure 4 As shown, the update continues from the final first measurement point toward the final second measurement point. The partial discharge change refers to the difference between the partial discharge quantity measured by the insulating rod between the final first measurement point and the partial discharge quantity at the moment before the update, when the update is performed from the final first measurement point toward the final second measurement point. For example, the partial discharge quantity measured by the insulating rod between the final first measurement point and the final second measurement point is initially 10 (10 here is only a value used for illustration, and no unit is used for ease of understanding). During the update of the final first measurement point, this value of 10 will gradually decrease to 9, 8, etc. At this time, the difference between 10 and 9, and the difference between 9 and 8 are the partial discharge changes.

[0115] Step S74142: When the partial discharge change is 0, define the final first measurement point at this time as the first intact point, and continue to update the final first measurement point.

[0116] When the change in partial discharge is 0, it means that the difference between the final first measurement point at this moment and the final first measurement point at the previous moment is 0. This means that there is a defect-free area between the final first measurement point and the final second measurement point before the update. The first intact point refers to the starting point of this defect-free area close to the final first measurement point.

[0117] Step S74143: When the partial discharge change is no longer 0, define the final first measurement point at this time as the second intact point. Until the final first measurement point is updated to the final second measurement point, output all the found intact points, the final first measurement point, the final second measurement point and the non-conductive defect signal together.

[0118] When the partial discharge change is no longer zero, it indicates that the first measurement point has moved back to the defective region. The position of the first measurement point at this point is the second intact point, which also represents the end point of the defect-free region in step S74142. Outputting all the found intact points, the final first measurement point, the final second measurement point, and the non-conductive defect signal together means outputting all intact regions along with the non-conductive defect signal.

[0119] The methods for obtaining leakage current curves include: Step S30: Obtain stray current before bending.

[0120] Stray current refers to the additional current generated by various factors other than leakage current before the insulation rod test. Stray current is obtained by measuring the insulation rod using a current sensor placed on it before the bending operation.

[0121] Step S31: Obtain the real-time leakage current during bending.

[0122] Real-time leakage current refers to the current value measured in real time by a current sensor during the bending operation of the insulating rod based on the feed distance. It is obtained by connecting the current sensor to the insulating rod and continuously collecting current data during the bending process to obtain the real-time leakage current.

[0123] Step S32: Calculate the actual leakage current based on stray current and real-time leakage current.

[0124] The actual leakage current is the leakage current generated by the insulating rod itself, after removing stray currents. The actual leakage current is calculated by subtracting the stray current from the real-time leakage current.

[0125] Step S33: Obtain the leakage current curve based on the actual leakage current.

[0126] Based on the same inventive concept, embodiments of the present invention provide a comprehensive electromechanical performance testing system for insulating rods.

[0127] An electromechanical performance testing system for insulating rods includes: The acquisition module is used to collect the extension length number; A memory for storing a program for a test method of the electromechanical comprehensive performance of an insulating rod; The processor loads and executes programs from memory.

[0128] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for testing the comprehensive electromechanical performance of an insulating rod, characterized in that, include: Step S1: Obtain the extension length number; Step S2: Find the feed distance from the preset feed database based on the extension length number; Step S3: Perform a preset bending operation based on the feed distance, and obtain the leakage current curve and feedback torque curve during the bending operation; Step S4: Obtain the maximum leakage current based on the leakage current curve; Step S5: Obtain the sudden torque value based on the feedback torque curve; Step S6: When the maximum leakage current is less than the preset leakage current threshold and there is no sudden torque value, output a performance qualified signal; Step S7: When the maximum leakage current exceeds the preset leakage current threshold or a sudden torque value exists, output a performance failure signal.

2. The method for testing the electromechanical comprehensive performance of an insulating rod according to claim 1, characterized in that, The method for outputting a performance failure signal when the maximum leakage current exceeds a preset leakage current threshold or a sudden torque value exists also includes: Step S70: Obtain an image of the insulating rod; Step S71: Identify and analyze the image of the insulating rod to determine the location of the impurities; Step S72: Remove the impurities based on their location and obtain the removal leakage current; Step S73: When the leakage current is less than the preset leakage current threshold, output a performance qualified signal; Step S74: When the leakage current exceeds the preset leakage current threshold, output a performance failure signal.

3. The method for testing the electromechanical comprehensive performance of an insulating rod according to claim 2, characterized in that, It also includes a specific method for identifying and analyzing images of insulating rods to determine the location of impurities, the method further including: Step S710: Based on the image of the insulating rod, obtain the current foreign object information and the current impurity position corresponding to the current foreign object information, and define the current impurity position as the impurity position; Step S711: When there is no foreign object information, analyze the image of the insulating rod to obtain the extension length scale; Step S712: Determine the non-extended length scale based on the extended length scale; Step S713: Determine the corresponding numbers of other extended lengths based on the non-extended length scale; Step S714: Select another extension length number and extend until the current foreign object information is present on the image of the insulating rod corresponding to the other extension length number.

4. The method for testing the electromechanical comprehensive performance of an insulating rod according to claim 2, characterized in that, The method for clearing the output performance failure signal when the leakage current exceeds a preset leakage current threshold also includes: Step S740: Traverse all protrusion length numbers, find all impurity locations and remove them, and obtain the complete removal leakage current; Step S741: When the leakage current is greater than the preset leakage current threshold after complete elimination, output a performance failure signal.

5. The method for testing the electromechanical comprehensive performance of an insulating rod according to claim 4, characterized in that, The method for clearing the output performance failure signal when the leakage current exceeds a preset leakage current threshold also includes: Step S7410: Obtain the partial discharge measurement points based on the extension length number; Step S7411: Perform partial discharge measurement based on the partial discharge measurement point and obtain the partial discharge quantity; Step S7412: If the partial discharge amount is not present, reselect the extension length number and repeat steps S7410 to S7411; Step S7413: When the partial discharge quantity is greater than the preset partial discharge quantity threshold, output a non-conductive defect signal; Step S7414: When traversing the extension length number and the partial discharge quantity is absent, output a performance failure signal.

6. The method for testing the electromechanical comprehensive performance of an insulating rod according to claim 5, characterized in that, The method for outputting a non-conductive defect signal when the partial discharge quantity exceeds a preset partial discharge quantity threshold also includes: Step S74130: Obtain the center measurement point based on the partial discharge measurement point; Step S74131: Perform partial discharge measurement based on the partial discharge measurement point and the center measurement point to obtain the first partial discharge quantity and the second partial discharge quantity; Step S74132: Define the non-zero discharge quantity in the first partial discharge quantity and the second partial discharge quantity as the defect discharge quantity. Step S74133: Obtain the defect measurement point and the defect center measurement point based on the partial discharge measurement point and the center measurement point corresponding to the defect discharge quantity; Step S74134: Repeat steps S74131 to S74132 based on the defect measurement point and the defect center measurement point until both the first partial discharge quantity and the second partial discharge quantity are not 0. Then, output the corresponding defect measurement point and non-conductive defect signal.

7. The method for testing the electromechanical comprehensive performance of an insulating rod according to claim 6, characterized in that, Also includes: Step S74135: When both the first partial discharge quantity and the second partial discharge quantity are not 0, obtain the first measurement point and the second measurement point based on the defect measurement point; Step S74136: Update the first measurement point based on the first measurement point and the second measurement point, and obtain the updated first partial discharge quantity; Step S74137: When the updated first partial discharge quantity is less than the partial discharge quantity, define the first measurement point at this time as the final first measurement point; Step S74138: Update the second measurement point based on the first measurement point and the second measurement point, and obtain the updated second partial discharge quantity; Step S74139: When the updated second partial discharge quantity is less than the partial discharge quantity, define the second measurement point at this time as the final second measurement point; Step S74140: Output a non-conductive defect signal based on the final first measurement point and the final second measurement point.

8. The method for testing the electromechanical comprehensive performance of an insulating rod according to claim 7, characterized in that, Also includes: Step S74141: Update the final first measurement point based on the final first measurement point and the final second measurement point and obtain the partial discharge change; Step S74142: When the partial discharge change is 0, define the final first measurement point at this time as the first intact point, and continue to update the final first measurement point; Step S74143: When the partial discharge change is no longer 0, define the final first measurement point at this time as the second intact point. Until the final first measurement point is updated to the final second measurement point, output all the found intact points, the final first measurement point, the final second measurement point and the non-conductive defect signal together.

9. The method for testing the electromechanical comprehensive performance of an insulating rod according to claim 1, characterized in that, Methods for obtaining leakage current curves include: Step S30: Obtain stray current before bending; Step S31: During bending, obtain the real-time leakage current; Step S32: Calculate the actual leakage current based on stray current and real-time leakage current; Step S33: Obtain the leakage current curve based on the actual leakage current.

10. A comprehensive electromechanical performance testing system for insulating rods, characterized in that, include: The acquisition module is used to collect the extension length number; A memory for storing a program for a test method for the electromechanical comprehensive performance of an insulating rod as described in any one of claims 1 to 9; The processor loads and executes programs from memory.

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