Method and system for detecting insulation performance of new energy high-voltage electrical equipment

Abstract

The invention provides a method and system for detecting the insulation performance of new energy high-voltage electrical equipment, and the method comprises the steps: constructing a high-voltage test vehicle for detecting the insulation performance of the new energy high-voltage electrical equipment, and integrating various insulation detection test equipment in the high-voltage test vehicle; based on the historical maintenance data of the plurality of new energy booster stations, generating a standardized operation flow and a post-maintenance evaluation strategy; based on historical insulation performance detection data of the new energy high-voltage electrical equipment, establishing an insulation fault diagnosis model; and carrying out insulation performance detection on the high-voltage electrical equipment in the high-voltage test vehicle according to the standardized operation process, transmitting obtained real-time detection data to the insulation fault diagnosis model, and judging whether the current high-voltage electrical equipment is in an abnormal state or not. According to the method, through integration of the high-voltage test vehicle and formulation of a standardized maintenance process, the efficiency and accuracy of insulation detection are improved, intelligent diagnosis and early warning of an abnormal state are realized, and potential faults can be found in advance.

Description

Technical Field

[0001] This application relates to the field of insulation testing technology for new energy high-voltage electrical equipment, and in particular to a method and system for testing the insulation performance of new energy high-voltage electrical equipment. Background Technology

[0002] With the rapid development of new energy technologies, the popularity of new energy high-voltage electrical equipment is constantly increasing. Its insulation performance directly affects the operational reliability and safety of the equipment. Therefore, the testing of the insulation performance of new energy high-voltage electrical equipment is an important part of the application process.

[0003] In related technologies, insulation performance testing of high-voltage electrical equipment for new energy sources typically employs decentralized testing instruments, transporting the equipment to be tested to various sites for on-site testing. The testing process relies heavily on manual operation, and maintenance procedures are primarily based on traditional thermal power plant experience.

[0004] However, the detection schemes in the aforementioned related technologies have large errors in the detection results, low detection efficiency, and cannot identify potential insulation faults in advance, exhibiting a lag effect. Summary of the Invention

[0005] This application aims to at least partially address one of the technical problems in the related art.

[0006] Therefore, the first objective of this application is to propose a method for testing the insulation performance of new energy high-voltage electrical equipment. This method improves the efficiency and accuracy of insulation testing by integrating a high-voltage testing vehicle and establishing a standardized maintenance process, and enables intelligent diagnosis and early warning of abnormal conditions, thus allowing potential faults to be detected in advance.

[0007] The second objective of this application is to propose an insulation performance testing system for new energy high-voltage electrical equipment.

[0008] The third objective of this application is to provide a computer-readable storage medium.

[0009] To achieve the above objectives, the first aspect of this application is to propose a method for testing the insulation performance of new energy high-voltage electrical equipment, comprising the following steps: A high-voltage testing vehicle for testing the insulation performance of high-voltage electrical equipment for new energy sources was constructed, and various insulation testing equipment were integrated into the high-voltage testing vehicle. Based on historical maintenance data from multiple new energy booster stations, a standardized operating procedure and post-maintenance evaluation strategy are generated for the maintenance of new energy high-voltage electrical equipment in the high-voltage test vehicle. An insulation fault diagnosis model was established based on historical insulation performance testing data of new energy high-voltage electrical equipment. According to the standardized operating procedure, the insulation performance of the current high-voltage electrical equipment is tested in the high-voltage test vehicle, and the obtained real-time test data is transmitted to the insulation fault diagnosis model to determine whether the current high-voltage electrical equipment has an abnormal state.

[0010] Optionally, the abnormal state includes decreased insulation performance and partial discharge. After determining whether the current high-voltage electrical equipment has an abnormal state, the method further includes: if the abnormal state exists, determining the abnormality level of the current high-voltage electrical equipment's abnormal state; and issuing graded warnings to staff based on the abnormality level through corresponding warning methods.

[0011] Optionally, the generation of standardized operating procedures and post-repair evaluation strategies applicable to the maintenance of new energy high-voltage electrical equipment in the high-voltage test vehicle includes: generating maintenance processes, technical specifications, and safety measures applicable to the maintenance of new energy high-voltage electrical equipment in the high-voltage test vehicle by summarizing and analyzing the historical maintenance data; after the insulation performance test of the current high-voltage electrical equipment, it also includes: repairing the current high-voltage electrical equipment based on the current test results, and evaluating the maintenance quality according to the post-repair evaluation strategy.

[0012] Optionally, the high-pressure test vehicle includes: a basic vehicle frame, a core test system, and an auxiliary support system.

[0013] Optionally, the vehicle's basic frame includes: a chassis system comprising multiple heavy-duty vehicle chassis components and a drive unit, the chassis system being used to support the various insulation testing equipment and enable vehicle movement; and a cab comprising a driver's control area, a passenger monitoring position, and a communication terminal, the driver's control area being used to control the movement of the high-voltage test vehicle, and the passenger monitoring position being used to support personnel monitoring the testing status of the high-voltage electrical equipment.

[0014] Optionally, the core testing system includes: a high-voltage generation system, comprising a high-voltage transformer, high-voltage bushings, and a voltage regulating device, used to convert mains power into the high-voltage power required for insulation performance testing; a parameter measurement unit, comprising a high-voltage divider, a current sensor, a partial discharge detector, and a data acquisition card, used to acquire insulation performance testing data in real time; and a control and protection unit, comprising a PLC control cabinet, an emergency stop button, an overvoltage / overcurrent protection module, and a grounding device, used to remotely control the testing process and provide protection against testing anomalies. Optionally, the auxiliary support system includes: a safety protection module for providing safety protection to workers during insulation performance testing; a power supply module for providing power to the high-voltage generation system; a data processing module for processing the insulation performance testing data and generating test results; and a storage and tool module for providing the tools required for insulation performance testing.

[0015] To achieve the above objectives, a second aspect of this application also proposes an insulation performance testing system for new energy high-voltage electrical equipment, comprising the following modules: An integrated module is used to construct a high-voltage test vehicle for testing the insulation performance of new energy high-voltage electrical equipment, integrating various insulation testing equipment into the high-voltage test vehicle; The generation module is used to generate standardized operating procedures and post-repair evaluation strategies for the maintenance of new energy high-voltage electrical equipment in the high-voltage test vehicle, based on historical maintenance data from multiple new energy booster stations. A module is established to build an insulation fault diagnosis model based on historical insulation performance test data of new energy high-voltage electrical equipment. The detection and diagnosis module is used to perform insulation performance testing on the current high-voltage electrical equipment in the high-voltage test vehicle according to the standardized operating procedure, and transmit the obtained real-time detection data to the insulation fault diagnosis model to determine whether the current high-voltage electrical equipment has an abnormal state.

[0016] To achieve the above objectives, the third aspect of this application also proposes a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the insulation performance testing method for new energy high-voltage electrical equipment as described in any of the first aspects above.

[0017] The technical solutions provided by the embodiments of this application bring at least the following beneficial effects: This application reduces equipment management costs and maintenance complexity through an integrated high-voltage testing vehicle, eliminating the need for frequent transfers of distributed testing equipment, significantly shortening test preparation time and equipment transportation time, and improving testing efficiency. Furthermore, the high-precision testing equipment and strict environmental control measures of the core testing system reduce the interference of human and environmental factors on the test results, significantly improving the accuracy of the test data. This application improves maintenance quality and equipment reliability by establishing standardized maintenance processes. The established standardized maintenance process and evaluation system provide unified technical standards and operating procedures for the maintenance of new energy high-voltage equipment, avoiding the problem of inconsistent maintenance quality caused by differences in the experience of maintenance personnel. Through strict post-repair evaluation methods, it ensures that the performance of the equipment after maintenance meets the standard requirements, improving the operational stability and safety reliability of the equipment. Based on the established fault model, this application accurately identifies abnormal equipment states and issues timely warning signals, realizing intelligent diagnosis and early warning of abnormal states, enabling early detection of potential faults and improving the timeliness of insulation fault detection.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart of a method for testing the insulation performance of new energy high-voltage electrical equipment according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a high-pressure test vehicle proposed in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a new energy high-voltage electrical equipment insulation performance testing system proposed in an embodiment of this application. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] It should be noted that the insulation performance testing scheme for new energy high-voltage electrical equipment in the relevant embodiments has the following problems: First, the insulation performance testing of new energy high-voltage electrical equipment suffers from low efficiency and poor accuracy. Traditional testing methods rely on decentralized testing equipment, which involves frequent transportation and inconvenient management, and is greatly affected by environmental factors (such as humidity and temperature), resulting in large fluctuations in insulation test data and inaccurate judgments. Second, there is a lack of uniformity in high-voltage equipment maintenance processes and standardized procedures. New energy booster station equipment is widely distributed and diverse, lacking unified maintenance processes and evaluation standards, leading to inconsistent maintenance quality and affecting equipment operational reliability. Third, there is insufficient equipment condition assessment and fault early warning capabilities. Existing testing methods are insufficient for real-time monitoring and trend analysis of equipment insulation status, and cannot identify potential faults such as partial discharge and insulation degradation in advance.

[0022] Therefore, this application proposes a method and system for testing the insulation performance of new energy high-voltage electrical equipment, which can effectively solve various problems of the insulation performance testing schemes in the above-mentioned related embodiments.

[0023] The following description, with reference to the accompanying drawings, illustrates a method and system for testing the insulation performance of new energy high-voltage electrical equipment, as proposed in an embodiment of this application.

[0024] Figure 1 This is a flowchart of a method for testing the insulation performance of new energy high-voltage electrical equipment according to an embodiment of this application, as shown below. Figure 1 As shown, the method includes the following steps: Step S101: Construct a high-voltage test vehicle for testing the insulation performance of new energy high-voltage electrical equipment, and integrate various insulation testing equipment into the high-voltage test vehicle.

[0025] Specifically, this application first constructs a high-voltage testing vehicle to integrate the testing system. A dedicated high-voltage testing vehicle is designed and customized to integrate various testing equipment required for the insulation performance testing of new energy high-voltage electrical equipment, such as AC / DC withstand voltage, series resonance, switching characteristics, and insulation resistance, into the vehicle. This enables unified management and rapid deployment of the testing equipment, improving testing efficiency and data consistency.

[0026] Among them, the customized high-pressure testing vehicle is the core equipment for achieving efficient and accurate testing. The various systems within it work together to ensure the stability, safety, and efficiency of the testing work.

[0027] In one embodiment of this application, such as Figure 2 As shown, the high-pressure test vehicle constructed in this application includes: a basic vehicle frame, a core test system, and an auxiliary support system.

[0028] The vehicle's basic frame includes: a chassis system, which comprises multiple heavy-duty vehicle chassis components and a drive unit, used to support various insulation testing equipment and enable vehicle movement; and a driver's cab, which includes a driver's control area, a passenger monitoring position, and a communication terminal, used to control the high-voltage test vehicle, and the passenger monitoring position to support personnel monitoring the testing status of high-voltage electrical equipment.

[0029] Specifically, the chassis system comprises multiple heavy-duty vehicle chassis components (e.g., Figure 2 The system comprises the frame, suspension, and braking components (as described above) and the vehicle drive unit, which bears the weight of all test equipment and ensures driving stability under complex road conditions. The driver's control area in the cab is used by the driver to operate the vehicle, while the co-driver's monitoring position allows test personnel to monitor the equipment status in real time during the testing process. A communication terminal enables internal and external communication between the operators in the test vehicle.

[0030] As an example, the vehicle's basic frame serves as the core load-bearing structure of the test vehicle. Its chassis system utilizes a heavy-duty truck chassis, which includes a high-strength frame, multi-link suspension, disc brakes, and a high-power drive unit. The high-strength frame can withstand the weight of all test equipment, ensuring its stability during transportation and testing. The multi-link suspension effectively absorbs vibrations generated by complex road conditions, reducing the impact of vibrations on the precision test equipment. The disc brakes feature sensitive braking and excellent heat dissipation, ensuring vehicle safety under various road conditions. The high-power drive unit provides ample power to the vehicle, ensuring its ability to traverse complex terrains such as mountainous and suburban areas. The driver's control area is equipped with a multi-function steering wheel, an LCD instrument panel, and a vehicle control system for convenient driver operation. The passenger-side monitoring position features an equipment status display screen, allowing test personnel to monitor the equipment's operating status in real time during driving and promptly detect any abnormalities. The communication terminal supports 4G / 5G networks and satellite communication, ensuring stable communication with the dispatch center even in remote areas, enabling real-time scheduling of testing tasks.

[0031] In one embodiment of this application, the core testing system includes: a high-voltage generating system, which includes a high-voltage transformer, a high-voltage bushing, and a voltage regulating device, used to convert mains power into the high-voltage power required for insulation performance testing; a parameter measurement unit, which includes a high-voltage divider, a current sensor, a partial discharge detector, and a data acquisition card, used to acquire insulation performance testing data in real time; and a control and protection unit, which includes a PLC control cabinet, an emergency stop button, an overvoltage / overcurrent protection module, and a grounding device, used to remotely control the testing process and provide protection against testing anomalies.

[0032] Specifically, the core testing system is the core system for achieving the insulation performance testing function of this application. The high-voltage generation unit includes components such as a high-voltage transformer (35kV), high-voltage bushings, and a voltage regulator. This unit is used to boost the mains power to the required high voltage for the test and output a stable high-voltage power supply. The parameter measurement unit includes components such as a high-voltage divider, a current sensor, a partial discharge detector, and a data acquisition card. This unit is used to collect key data such as voltage, current, and partial discharge quantity during the test in real time. The control and protection unit includes components such as a PLC control cabinet, an emergency stop button, an overvoltage / overcurrent protection module, and a grounding device. This unit is used to remotely control the test process and immediately cut off the high voltage in case of abnormalities to ensure the safety of personnel and equipment.

[0033] As an example, the core testing system, serving as the functional core of the test vehicle, is responsible for performing various insulation performance tests on high-voltage electrical equipment. The high-voltage generation unit includes a 35kV high-voltage transformer, high-voltage bushings, and a voltage regulating device. The 35kV high-voltage transformer is constructed from high-quality silicon steel sheets and copper wire, featuring low loss, high efficiency, and low temperature rise, capable of stepping up the mains voltage (220V / 380V) to the required 10kV-500kV high voltage for testing. The high-voltage bushings use epoxy resin insulation material, possessing excellent insulation performance and mechanical strength, effectively preventing high-voltage leakage. The voltage regulating device employs an autotransformer, enabling smooth adjustment of the output voltage to meet the test voltage requirements of different equipment.

[0034] The parameter measurement unit includes a high-voltage divider, a current sensor, a partial discharge detector, and a data acquisition card. The high-voltage divider utilizes the capacitive voltage divider principle, offering high measurement accuracy and good linearity, enabling accurate measurement of high-voltage values ​​during testing. The current sensor employs a Hall effect current sensor, characterized by fast response and a wide measurement range, allowing real-time acquisition of the test current. The partial discharge detector uses the pulse current method to detect partial discharge signals within the equipment with high sensitivity. The data acquisition card uses a high-speed AD conversion chip with a sampling rate of up to 1MHz, enabling rapid and accurate acquisition of various test data and transmission to an industrial computer.

[0035] The control and protection unit includes a PLC control cabinet, an emergency stop button, an overvoltage / overcurrent protection module, and a grounding device. The PLC control cabinet, as the control core, enables automated control of the testing process, such as voltage regulation, current acquisition, and data storage. The emergency stop button is installed in the driver's cab and the test operation area. In case of an emergency, the operator can quickly press the button to cut off the high-voltage power supply, ensuring the safety of personnel and equipment. The overvoltage / overcurrent protection module is set with overvoltage and overcurrent thresholds. When the detected voltage or current exceeds the threshold, it automatically cuts off the high-voltage output to prevent equipment damage. The grounding device uses copper grounding electrodes with a grounding resistance less than a preset value, ensuring safe high-voltage grounding during the test and preventing electric shock accidents.

[0036] In one embodiment of this application, the auxiliary protection system includes: a safety protection module for providing safety protection to workers during insulation performance testing; a power supply module for providing power to the high-voltage generation system; a data processing module for processing insulation performance testing data and generating test results; and a storage and tool module for providing the tools required for insulation performance testing.

[0037] Specifically, the auxiliary protection system ensures safety and improves efficiency during insulation testing. The safety protection module includes components such as: high-voltage warning lights, retractable insulating fencing, grounding electrodes, and storage cabinets for insulating gloves / boots. The power supply module includes components such as: an onboard generator (backup), a mains power interface, and a UPS uninterruptible power supply. The data processing module includes components such as an industrial computer, testing software (covering data storage, analysis, and report generation), and a printer. The storage and tool module includes components such as test cable racks, dedicated tool cabinets, and spare parts storage boxes.

[0038] As an example, the auxiliary protection system provides safety and efficiency support for testing operations. The high-voltage warning light in the safety protection module is installed on the vehicle roof and flashes a warning signal during testing to alert surrounding personnel to safety. The retractable insulated fence, made of fiberglass, has an extension length to meet testing requirements and can quickly enclose the testing area to prevent unauthorized personnel from entering. The grounding electrode is connected to the grounding device of the control and protection unit to further ensure grounding safety. The insulated glove / boot storage cabinet is equipped with a dehumidifier to keep the interior dry and prevent moisture from affecting the insulation performance of the insulated gloves and boots.

[0039] The power supply module includes an onboard generator, a mains power interface, and a UPS (Uninterruptible Power Supply). The onboard generator is a diesel generator, which can serve as a backup power source in areas without mains power, providing stable power to the testing equipment. The mains power interface uses an industrial-grade socket, allowing connection to mains power to meet the equipment's power needs when mains power is available. The UPS has a capacity of 10kVA, providing uninterrupted power to critical equipment such as the PLC control cabinet and data processing modules during mains power outages or when the onboard generator starts and switches off, preventing data loss and equipment damage.

[0040] The data processing module includes an industrial computer, testing software, and a printer. The industrial computer is equipped with a high-performance CPU and a large-capacity hard drive, offering excellent stability and data processing capabilities. The testing software, developed based on LabVIEW, features data storage, analysis, and report generation functions. It can display test data curves in real time, perform trend analysis and anomaly detection, and generate test reports that meet industry standards. The printer is an industrial-grade laser printer, capable of printing test reports on-site, facilitating timely recording and archiving by staff.

[0041] The storage and tool module includes a test cable rack, a dedicated tool cabinet, and a spare parts storage box. The test cable rack features a layered design, allowing for the categorized storage of high-voltage test cables of different specifications, preventing cable tangling and damage. The dedicated tool cabinet is equipped with drawers and dividers for storing specialized tools required for testing, such as high-voltage probes and insulated wrenches. The spare parts storage box stores consumable parts and spare components, such as high-voltage bushings and sensors, for timely replacement in case of equipment failure, ensuring the continuity of testing operations.

[0042] Step S102: Based on historical maintenance data from multiple new energy booster stations, generate a standardized operating procedure and post-maintenance evaluation strategy applicable to the maintenance of new energy high-voltage electrical equipment in the high-voltage test vehicle.

[0043] Specifically, this application also utilizes real historical data obtained from maintenance tasks in a large number of new energy booster stations to establish a standardized maintenance process and evaluation system to ensure the consistency of equipment maintenance quality.

[0044] In one embodiment of this application, a standardized operating procedure and post-repair evaluation strategy for overhauling new energy high-voltage electrical equipment in a high-voltage test vehicle are generated, including: by summarizing and analyzing historical maintenance data, generating maintenance processes, technical specifications, and safety measures applicable to overhauling new energy high-voltage electrical equipment in a high-voltage test vehicle; after performing insulation performance testing on the current high-voltage electrical equipment, the method further includes: repairing the current high-voltage electrical equipment based on the current test results, and evaluating the maintenance quality according to the post-repair evaluation strategy.

[0045] Specifically, this embodiment, through completing maintenance tasks at multiple new energy booster stations, summarizes and verifies maintenance processes, technical specifications, and safety measures applicable to new energy high-voltage equipment, forming a standardized operating procedure and post-maintenance evaluation method. That is, this embodiment conducts on-site surveys and maintenance practices at new energy booster stations of different regions and types, summarizing and verifying a standardized maintenance process and evaluation system applicable to the high-voltage test vehicle constructed in the previous step for new energy high-voltage equipment. This system covers four aspects: maintenance processes, technical specifications, safety measures, and post-maintenance evaluation methods.

[0046] As an example, detailed maintenance procedures have been developed for different types of new energy high-voltage equipment (such as transformers, circuit breakers, and disconnectors) for maintenance in a high-voltage testing vehicle. Taking transformer maintenance as an example, the maintenance process includes steps such as visual inspection, oil quality testing, insulation resistance measurement, turns ratio testing, DC resistance measurement, and partial discharge detection. In the visual inspection step, it is required to check whether the transformer casing is deformed or leaking oil, and whether the bushings are clean and free of cracks. Oil quality testing uses oil analysis technology to detect indicators such as dielectric loss, breakdown voltage, and moisture content. Insulation resistance measurement uses a 2500V megohmmeter; before measurement, the equipment must be fully discharged, and the ambient temperature must be controlled between 10-30℃, with a relative humidity not exceeding 75%.

[0047] The technical specifications clearly define the technical parameters and requirements for various maintenance tasks on the high-voltage testing vehicle. For example, for the circuit breaker opening and closing time test, the opening time is required to be no greater than 0.05s and the closing time no greater than 0.08s; for the contact resistance measurement of the disconnecting switch, the contact resistance is required to be no greater than 100μΩ. At the same time, the accuracy requirements for testing equipment are standardized, such as the measurement error of the high-voltage divider being no greater than ±1%, and the sensitivity of the partial discharge detector being no less than 1pC.

[0048] Regarding safety measures, strict safety operating procedures have been established for maintenance work in the high-voltage test vehicle to ensure the personal safety of maintenance personnel and the safety of equipment. For example, before maintenance of high-voltage equipment, safety measures such as power outage, voltage testing, grounding, and hanging warning signs must be implemented; during maintenance, operators must wear insulated gloves and boots and use insulated tools; outdoor high-voltage equipment maintenance is strictly prohibited during thunderstorms; when multiple people are working together, a designated person must be responsible for supervision.

[0049] For post-repair evaluation methods, a maintenance quality evaluation index system was established to evaluate maintenance quality from aspects such as equipment performance, operational stability, and safety and reliability. Equipment performance evaluation includes comparing test results of parameters such as insulation resistance, dielectric loss, and partial discharge with standard values; operational stability evaluation involves analyzing operational data within one month after equipment maintenance to observe whether abnormal fluctuations occur; safety and reliability evaluation checks the implementation of safety measures during maintenance and whether the equipment's safety protection devices are functioning properly. Based on the evaluation results, maintenance quality is divided into three levels: excellent, qualified, and unqualified. Unqualified maintenance items require re-maintenance.

[0050] Step S103: Based on the historical insulation performance test data of new energy high-voltage electrical equipment, establish an insulation fault diagnosis model.

[0051] Specifically, this application also constructs an intelligent equipment status diagnosis system, which establishes an equipment fault model based on a large amount of experimental data. This model can intelligently identify and warn of abnormal states such as insulation performance degradation and partial discharge, thereby improving the accuracy and timeliness of fault diagnosis.

[0052] This application, based on machine learning algorithms and big data analysis technology, establishes an insulation fault diagnosis model by learning from a large amount of historical test data and equipment fault data. This model can then be combined with real-time monitoring data to achieve intelligent identification and early warning of abnormal equipment insulation conditions.

[0053] As one possible approach, the process of constructing an insulation fault diagnosis model includes the following steps: The first step is data acquisition. The system connects to the parameter measurement unit of the customized high-voltage test vehicle and on-site real-time monitoring equipment (such as online partial discharge monitoring devices and temperature sensors) via a data acquisition interface to collect real-time operating data such as insulation resistance, dielectric loss, partial discharge, temperature, voltage, and current. The data acquisition frequency can be adjusted according to the equipment type and operating status. For critical equipment, the data acquisition frequency can reach once per minute; for general equipment, the data acquisition frequency is once every 10 minutes. Thus, by collecting actual test data from the high-voltage test vehicle and combining it with relevant data collected through various channels, the training data required for model training is obtained.

[0054] The second step is data preprocessing. Since the collected data may contain noise, missing values, etc., the system first preprocesses the data. Wavelet transform algorithm is used to denoise the data, removing the influence of environmental interference and equipment noise. For missing values, linear interpolation or mean imputation is used based on the time series characteristics of the data to ensure data integrity and accuracy.

[0055] The third step is fault model establishment. A machine learning algorithm combining Support Vector Machine (SVM) and Backpropagation (BP) neural network can be used to build the equipment fault model. First, historical fault data is labeled, categorizing equipment faults into different types such as insulation degradation, partial discharge, and winding deformation. Then, key characteristic parameters such as insulation resistance, dielectric loss, and partial discharge quantity are selected as input variables for the model, with the fault type as the output variable, for training and optimization. Through training with a large amount of historical data, the model's fault identification accuracy can reach over 95%.

[0056] Step S104: Following the standardized operating procedure, the insulation performance of the current high-voltage electrical equipment is tested in the high-voltage test vehicle, and the obtained real-time test data is transmitted to the insulation fault diagnosis model to determine whether there is an abnormal state in the current high-voltage electrical equipment.

[0057] Specifically, during actual testing, the insulation performance of the current high-voltage electrical equipment is tested in the constructed high-voltage test vehicle according to the standardized operating procedures determined in the above steps.

[0058] As one possible approach, during the insulation performance testing phase, the target equipment is powered off according to the testing plan. The power switch is disconnected, the isolating switch is opened, and warning signs are hung on both the power supply and load sides of the equipment. Then, the equipment is tested for voltage using a voltage detector at both the inlet and outlet terminals to confirm that the equipment is powered off. Next, the test circuit is connected. The high-voltage output terminal of the customized high-voltage testing vehicle is connected to the test terminals of the equipment under test via high-voltage cables, and the sensors of the parameter measurement unit are connected to the corresponding parts of the equipment under test. During the connection process, ensure that the cables are securely connected to avoid poor contact; at the same time, pay attention to the placement of the high-voltage cables to avoid contact with other equipment or metal objects to prevent high-voltage discharge. Then, the PLC control cabinet of the control and protection unit is started, the test software is opened, and the test parameters are set, such as the test voltage, test time, and data acquisition frequency. The corresponding test parameters are set according to the type of equipment under test and the standard requirements. For example, for the AC withstand voltage test of a 110kV transformer, the test voltage is set to 184kV, the test time is set to 1 minute, and the data acquisition frequency is set to 1 time / second.

[0059] Then, start the high-voltage generating unit and slowly increase the test voltage through the voltage regulating device. At the same time, closely observe the various test data (such as voltage, current, partial discharge, etc.) and the operating status of the equipment displayed on the test software. If any abnormal data or abnormal noises or smoke are found during the voltage increase process, immediately press the emergency stop button to cut off the high-voltage power supply, find out the cause, and take appropriate action.

[0060] When the test voltage rises to the set value, maintain the test voltage stable and start timing. During the test time, continuously collect and record test data, and the test software automatically plots data curves to display the data change trend in real time.

[0061] After the test period ends, slowly reduce the test voltage to zero using the voltage regulating device, disconnect the high-voltage power supply, and fully discharge the equipment under test for at least 5 minutes. Then disconnect the test circuit, restore the normal wiring of the equipment, remove the grounding device and marking plate, and the equipment testing work is completed.

[0062] Furthermore, in one embodiment of the application, after performing insulation performance testing on the current high-voltage electrical equipment, the method further includes: repairing the current high-voltage electrical equipment based on the current test results, and evaluating the quality of the repair in accordance with a post-repair evaluation strategy.

[0063] For example, during the maintenance implementation phase, based on the test results of the customized high-voltage test vehicle and the requirements of the standardized maintenance process and evaluation system, the equipment and maintenance items requiring maintenance are determined. Equipment with unqualified test results must be maintained; for equipment with test results close to the upper limit of the standard value, a decision is made regarding whether preventative maintenance should be performed based on the equipment's age and usage. Maintenance personnel perform maintenance on the equipment according to the steps of the standardized maintenance process. During the maintenance process, technical specifications and safety measures are strictly followed, and maintenance records are kept, including key parameters, the models and quantities of replaced parts, etc. For example, in transformer oil quality maintenance, if the test reveals that the oil's moisture content exceeds the standard, maintenance personnel must extract all the transformer oil, filter and dry it, then reinject it into the transformer, and test the oil's moisture content again to ensure it meets the standard requirements.

[0064] After maintenance, preliminary debugging and testing are performed on the equipment to check whether its various performance parameters meet the requirements. For example, the circuit breaker after maintenance is subjected to opening and closing tests to measure the opening and closing time and contact resistance, ensuring that it meets the technical specifications.

[0065] During the post-repair evaluation phase, a comprehensive evaluation of the repaired equipment is conducted according to the standardized maintenance process and evaluation system. Professional technicians review the equipment's maintenance records to ensure the maintenance process meets process requirements and safety measures. On-site testing is performed, measuring parameters such as insulation resistance, dielectric loss, and partial discharge, comparing these values ​​with standard values ​​to evaluate equipment performance. Operating data is collected for one month after maintenance to analyze operational stability. The equipment's safety protection devices are checked for proper functioning to evaluate its safety and reliability.

[0066] For example, the maintenance quality level is determined based on the evaluation results. If the maintenance quality is excellent, the equipment can be put into normal operation; if the maintenance quality is acceptable, minor problems need to be rectified before operation; if the maintenance quality is unacceptable, a new maintenance plan must be developed, and the equipment must be re-maintained until the maintenance quality is acceptable. Relevant data and information from the maintenance evaluation process can also be organized and archived to establish equipment maintenance files, providing a reference for subsequent operation and maintenance of the equipment.

[0067] Furthermore, the real-time detection data obtained through detection is transmitted to the insulation fault diagnosis model established in step S103 for condition monitoring and early warning.

[0068] Specifically, after the equipment is put into operation, this application collects the equipment's operating data in real time, including parameters such as insulation resistance, dielectric loss, partial discharge, temperature, voltage, and current. The preprocessed data is then input into the insulation fault diagnosis model, which analyzes and judges the data to identify whether the equipment is in an abnormal state.

[0069] In one embodiment of this application, after determining whether there is an abnormal state in the current high-voltage electrical equipment, the method further includes: if there is an abnormal state, determining the abnormality level of the current abnormal state in the high-voltage electrical equipment; and issuing graded warnings to staff based on the abnormality level through corresponding warning methods.

[0070] Specifically, if the model detects an abnormal state in the equipment, it issues an early warning signal of the corresponding level based on the severity of the abnormality and generates an early warning report to be sent to the maintenance personnel in the vehicle or the remote dispatch center. For example, a level one early warning is only a text reminder on the terminal device, a level two early warning is an audible and visual alarm in the high-voltage test vehicle, and a level three early warning, in addition to the level two warning, can also send a voice alarm to the staff's mobile terminal.

[0071] Subsequently, upon receiving the early warning report, maintenance personnel promptly conduct on-site inspections and diagnoses of the equipment, and take corresponding measures based on the warning level. For Level 1 warnings, the monitoring frequency of the equipment is increased, and close attention is paid to changes in equipment status; for Level 2 warnings, planned maintenance is arranged, and the equipment is repaired during the equipment shutdown window; for Level 3 warnings, personnel are immediately organized to shut down the equipment for maintenance to prevent the fault from escalating.

[0072] After the equipment fault is handled, the handling effect can be evaluated, the insulation fault diagnosis model can be updated, and the diagnostic accuracy and early warning reliability of the model can be improved.

[0073] In summary, the insulation performance testing method for new energy high-voltage electrical equipment in this application reduces equipment management costs and maintenance complexity by using an integrated high-voltage testing vehicle. It eliminates the need for frequent transfers of distributed testing equipment, significantly shortening preparation and transportation times and improving testing efficiency. Furthermore, the high-precision testing equipment and strict environmental control measures of the core testing system reduce interference from human and environmental factors, significantly improving the accuracy of the test data. This method improves maintenance quality and equipment reliability by establishing standardized maintenance procedures. The established standardized maintenance process and evaluation system provide unified technical standards and operating procedures for the maintenance of new energy high-voltage equipment, avoiding inconsistent maintenance quality due to differences in maintenance personnel experience. Through rigorous post-repair evaluation methods, it ensures that the performance of the equipment after maintenance meets standard requirements, improving the operational stability and safety reliability of the equipment. Based on the established fault model, this method accurately identifies abnormal equipment states and issues timely warning signals, achieving intelligent diagnosis and early warning of abnormal states. It can detect potential faults in advance, improving the timeliness of insulation fault detection.

[0074] To achieve the above embodiments, this application also proposes an insulation performance testing system for new energy high-voltage electrical equipment. Figure 3 This is a schematic diagram of the structure of a new energy high-voltage electrical equipment insulation performance testing system proposed in an embodiment of this application, as shown below. Figure 3 As shown, the system includes: The integrated module 100 is used to construct a high-voltage test vehicle for testing the insulation performance of new energy high-voltage electrical equipment, integrating a variety of insulation testing equipment into the high-voltage test vehicle.

[0075] The generation module 200 is used to generate standardized operating procedures and post-repair evaluation strategies for the maintenance of new energy high-voltage electrical equipment in high-voltage test vehicles, based on historical maintenance data from multiple new energy booster stations.

[0076] Module 300 is established to create an insulation fault diagnosis model based on historical insulation performance testing data of new energy high-voltage electrical equipment.

[0077] The detection and diagnosis module 400 is used to perform insulation performance testing on the current high-voltage electrical equipment in the high-voltage test vehicle according to the standardized operating procedures, and transmit the obtained real-time detection data to the insulation fault diagnosis model to determine whether there is an abnormal state in the current high-voltage electrical equipment.

[0078] In one embodiment of this application, the system further includes an early warning module, which is specifically used to: determine the abnormality level of the current abnormal state of the high-voltage electrical equipment when an abnormal state exists; and issue graded early warnings to staff through corresponding early warning methods based on the abnormality level.

[0079] It should be noted that the explanation of the aforementioned embodiment of the insulation performance testing method for new energy high-voltage electrical equipment also applies to the system of this embodiment, and will not be repeated here.

[0080] In summary, the insulation performance testing system for new energy high-voltage electrical equipment in this application improves the efficiency and accuracy of insulation testing by integrating a high-voltage testing vehicle and establishing standardized maintenance procedures. It also enables intelligent diagnosis and early warning of abnormal conditions, allowing for the early detection of potential faults.

[0081] To implement the above embodiments, this application also proposes a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the insulation performance testing method for new energy high-voltage electrical equipment as described in any one of the first aspects of the embodiments above.

[0082] 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 this application. 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.

[0083] 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 application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0084] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0085] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0086] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0087] Those skilled in the art will understand that all or part of the steps of the methods described in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it includes one or a combination of the steps of the method embodiments.

[0088] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0089] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A method for detecting the insulation performance of new energy high-voltage electrical equipment, characterized in that, The method comprises the following steps: A high-voltage test vehicle for detecting the insulation performance of new energy high-voltage electrical equipment is constructed, and various insulation detection test equipment is integrated in the high-voltage test vehicle; Based on historical maintenance data of multiple new energy booster stations, a standardized operation process and post-repair evaluation strategy suitable for the maintenance of new energy high-voltage electrical equipment in the high-voltage test vehicle are generated; Based on historical insulation performance detection data of new energy high-voltage electrical equipment, an insulation fault diagnosis model is established; According to the standardized operation process, the insulation performance of the current high-voltage electrical equipment is detected in the high-voltage test vehicle, and real-time detection data obtained is transmitted to the insulation fault diagnosis model to determine whether the current high-voltage electrical equipment has an abnormal state.

2. The method of claim 1, wherein, The abnormal state includes insulation performance degradation and partial discharge. After determining whether the current high-voltage electrical equipment has an abnormal state, the method further comprises: In the case where the abnormal state exists, determining the abnormal level of the abnormal state of the current high-voltage electrical equipment; According to the abnormal level, a hierarchical early warning is given to the staff through a corresponding early warning mode.

3. The method of claim 1, wherein, The generation of the standardized operation process and the post-repair evaluation strategy suitable for the maintenance of new energy high-voltage electrical equipment in the high-voltage test vehicle comprises: By summarizing and analyzing the historical maintenance data, a maintenance process, technical specification and safety measure suitable for the maintenance of new energy high-voltage electrical equipment in the high-voltage test vehicle are generated; After detecting the insulation performance of the current high-voltage electrical equipment, the method further comprises: Repairing the current high-voltage electrical equipment according to the current detection result, and evaluating the repair quality according to the post-repair evaluation strategy.

4. The method of claim 1, wherein, The high-voltage test vehicle comprises a whole vehicle basic frame, a core test system and an auxiliary support system.

5. The method of claim 4, wherein, The whole vehicle basic frame comprises: A chassis system comprising a plurality of heavy-duty automobile chassis components and a driving unit, the chassis system being used for carrying the various insulation detection test equipment and realizing vehicle driving; A cab comprising a main driver control area, a vice driver monitoring position and a communication terminal, the main driver control area being used for controlling the driving of the high-voltage test vehicle, and the vice driver monitoring position being used for carrying a high-voltage electrical equipment test state monitoring personnel.

6. The method of claim 4, wherein, The core test system comprises: A high-voltage generation system comprising a high-voltage transformer, a high-voltage bushing and a voltage regulating device, the high-voltage generation system being used for converting commercial power into high-voltage power required for insulation performance detection; A parameter measurement unit comprising a high-voltage voltage divider, a current sensor, a partial discharge detector and a data acquisition card, the parameter measurement unit being used for real-time acquisition of insulation performance detection data; A control and protection unit comprising a PLC control cabinet, an emergency stop button, an overvoltage / overcurrent protection module and a grounding device, the control and protection unit being used for remote control of the detection process and detection abnormality protection.

7. The method of claim 6, wherein, The auxiliary support system comprises: A safety protection module used for safety protection of the operating personnel during insulation performance detection; A power supply module for providing power supply to the high-voltage generating system; A data processing module for processing the insulation performance detection data to generate a detection result; A storage and tool module for providing tools required for insulation performance detection.

8. A new energy high-voltage electrical equipment insulation performance detection system, characterized in that, Comprise the following modules: An integration module for constructing a high-voltage test vehicle for new energy high-voltage electrical equipment insulation performance detection, and integrating various insulation detection test equipment in the high-voltage test vehicle; A generation module for generating a standardized operation process and post-repair evaluation strategy suitable for repairing new energy high-voltage electrical equipment in the high-voltage test vehicle based on historical repair data of a plurality of new energy booster stations; An establishment module for establishing an insulation fault diagnosis model based on historical insulation performance detection data of new energy high-voltage electrical equipment; A detection and diagnosis module for performing insulation performance detection on the current high-voltage electrical equipment in the high-voltage test vehicle according to the standardized operation process, and transmitting the obtained real-time detection data to the insulation fault diagnosis model to determine whether the current high-voltage electrical equipment has an abnormal state.

9. The system of claim 8, wherein, Further comprising a warning module, which is specifically used for: In the case of the abnormal state, judging the abnormal level of the abnormal state of the current high-voltage electrical equipment; For the abnormal level, the corresponding warning mode is used to give a graded warning to the staff.

10. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to realize the new energy high-voltage electrical equipment insulation performance detection method of any one of claims 1-7.

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