Transformer full compatibility automated testing device and method

Abstract

The application discloses a transformer full-compatibility automatic detection device and method, relates to the technical field of automatic detection of power transformers, and comprises a transformer electrical automatic wiring device, which is used for electrical automatic wiring of the transformer and connection into a working circuit; a transformer test and measurement device, which is connected with the transformer and is used for measuring operation parameters of the transformer; a compatible tool tray, which is provided with a standardized electrical switching interface and a modular positioning structure for placing different types of transformers; a transformer conveying device, which is used for conveying the compatible tool tray with the transformer to a detection station; and a control device, which is used for controlling the transformer electrical automatic wiring device, the transformer test and measurement device, the compatible tool tray and the transformer conveying device. The application realizes unified automatic detection of full types of transformers, greatly reduces the labor intensity of operators, avoids the safety risks caused by manual operation of high-voltage terminals, and guarantees the safety and controllability of the detection process.

Description

Technical Field

[0001] This invention relates to the field of automated testing technology for power transformers, and in particular to a fully compatible automated testing device and method for power transformers. Background Technology

[0002] With the continuous advancement of automation technology, instrument transformers in power distribution networks have now achieved automated verification. However, the automated verification of instrument transformers still has the following shortcomings: User-owned power transformers come in numerous models and vary greatly in shape and size, making standardized compatibility difficult. Existing automated calibration lines can only calibrate State Grid standard transformers; user-owned power transformers cannot be calibrated on automated lines and must be calibrated manually using a manual calibration station. This manual calibration method has several drawbacks: first, it is costly, requiring a dedicated manual calibration station and various auxiliary tools; second, it is labor-intensive, requiring operators to manually complete a series of processes including wiring, testing, and disconnection, and each calibration session is time-consuming; third, it is inefficient, with cumbersome manual procedures preventing large-scale batch calibration; and fourth, it poses a high risk of personal safety, as the calibration process involves high-voltage electricity, and manual wiring and operation can easily lead to electric shock and other accidents. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies where user asset transformers cannot be automatically verified due to their diverse models and sizes, requiring manual wiring for verification, which results in high equipment costs, high labor intensity, low verification efficiency, and high personal safety risks. This invention provides a fully compatible automated verification device and method for transformers, which ensures fully compatible automated verification of transformers through a compatible tooling tray, standardized adapter interface, and PLC collaborative control.

[0004] The objective of this invention is achieved through the following technical solution: A fully compatible automated verification device for current transformers, including: An automatic electrical wiring device for instrument transformers is used to automatically wire instrument transformers and connect them to the working circuit. A current transformer testing and measuring device, which is connected to the current transformer and measures its operating parameters; The compatible tooling tray is equipped with a standardized electrical conversion interface and a modular positioning structure for placing different types of current transformers. A current transformer conveying device is used to transport a compatible tooling pallet containing current transformers to the calibration station; The control device is used to control the operation of the automatic electrical wiring device for instrument transformers, the instrument transformer testing and measuring device, the compatible tooling tray, and the instrument transformer conveying device.

[0005] Preferably, the automatic electrical wiring device for the current transformer includes an automatic electrical wiring device for the secondary current transformer, which includes an electrical wiring module, a solenoid valve, a cylinder, and a photoelectric sensor. The electrical wiring module, solenoid valve, cylinder, and photoelectric sensor are all connected to the control device via a PLC controller.

[0006] Preferably, the automatic electrical wiring device for the instrument transformers further includes an automatic primary electrical wiring device for voltage transformers and an automatic primary electrical wiring device for current transformers. The automatic primary electrical wiring device for voltage transformers includes a high-voltage primary circuit wiring mechanism and a high-voltage primary circuit experimental switching mechanism. The high-voltage primary circuit wiring mechanism includes an automatic A-pole contact crimping mechanism, an automatic B-pole contact crimping mechanism, a standard voltage transformer primary high-voltage switching mechanism, and a withstand voltage and insulation primary switching mechanism. The automatic A-pole contact crimping mechanism and the automatic B-pole contact crimping mechanism are respectively mounted on a two-axis moving platform. A servo motor controls the two-axis moving platform to adjust the positions of the A-pole and B-pole contacts in the X-axis and Y-axis directions, respectively. The automatic primary electrical wiring device for current transformers includes an automatic connection mechanism and a multi-position switching module for automatic current connection under different transformation ratios. The automatic primary electrical wiring device for current transformers is mounted on a moving platform equipped with a servo motor. The moving platform is used to adjust the positions of the automatic primary electrical wiring device for current transformers in the X-axis and Y-axis directions.

[0007] Preferably, the automatic wiring device for secondary electrical connections of the instrument transformer includes two sub-devices: an automatic wiring device for the secondary terminals of the voltage instrument transformer and an automatic wiring device for the secondary terminals of the current instrument transformer. The instrument transformer testing and measuring device includes a voltage testing and measuring device and a current testing and measuring device. The voltage testing and measuring device is connected to the automatic wiring device for the secondary terminals of the voltage instrument transformer via an electrical switching device, and the current testing and measuring device is connected to the automatic wiring device for the secondary terminals of the current instrument transformer via an electrical switching device.

[0008] Preferably, the compatible tooling tray specifically includes an insulating base plate, a metal grounding plate, a limiting device, and an information identification component. The metal grounding plate, the limiting device, and the information identification component are all mounted on the insulating base plate. The metal grounding plate is connected to the grounding mechanism to ensure that the current transformer meets the grounding requirements of the insulating base plate during testing. The limiting device includes a limiting stop bar, which restricts the current transformer to a fixed area of ​​the tooling tray. The information identification component is used to determine the type of current transformer.

[0009] Preferably, the compatible tooling tray specifically includes an insulating base plate, a metal grounding plate, a high-voltage insulation device, a conductive plate, a primary terminal, a primary connecting wire, a secondary terminal, a secondary connecting wire, a limiting device, and an information identification component. The primary terminal is connected to the primary connecting wire via the conductive plate. The conductive plate is mounted on the high-voltage insulation device, which is mounted on the insulating base plate. The primary terminal is also connected to the automatic electrical wiring device of the current transformer, and the primary connecting wire is also connected to the primary terminal of the current transformer. The secondary terminal is connected to the secondary connecting wire, and the secondary terminal is also connected to the automatic electrical wiring device of the current transformer, and the secondary connecting wire is also connected to the secondary terminal of the current transformer. The limiting device includes a limiting pin and a limiting stop bar, which, through their cooperation, restrict the current transformer to a fixed area on the tooling tray. The information identification component is used to identify the type of current transformer.

[0010] Preferably, the transformer is a 10kV voltage and current transformer.

[0011] Preferably, the control device controls the operation of the automatic electrical wiring device for the instrument transformer, the instrument transformer testing and measuring device, the compatible tooling tray, and the instrument transformer conveying device via a PLC.

[0012] As a preferred method, the fully compatible automated verification method for current transformers includes the following steps: Place and fix the current transformer to be tested on the compatible tooling tray, and send the information of the current transformer to the control device; The current transformer conveyor transports the tooling pallet to the calibration station; Based on the information from the instrument transformer, the control device drives the automatic electrical wiring device of the instrument transformer to work and complete the automatic electrical wiring of the instrument transformer; at the same time, the control device obtains the test plan matching the information of the instrument transformer and controls the test measurement device of the instrument transformer to work, completes the measurement of the operating parameters of the instrument transformer and uploads the measurement parameters. The automatic electrical wiring device of the current transformer is reset and disconnected from the terminals of the current transformer. The current transformer conveying device transfers the tooling pallet to the unloading station, takes out the current transformer that has been calibrated, and completes the calibration process.

[0013] Preferably, the current transformer includes a standard current transformer and a user-general-purpose current transformer. For the standard current transformer, the automatic secondary electrical wiring device automatically connects to the secondary terminals of the current transformer; for the user-general-purpose current transformer, the automatic secondary electrical wiring device automatically connects to the secondary terminals.

[0014] The beneficial effects of this invention are as follows: This invention relies on the collaborative design of core components such as the automatic electrical wiring device for instrument transformers, the compatible tooling tray, and the instrument transformer conveying device. Through the standardized electrical conversion interface and modular positioning structure of the compatible tooling tray, it accurately adapts to 10kV voltage and current transformers of different models and sizes in accordance with State Grid standards and user assets. This solves the pain point in the prior art where user asset instrument transformers cannot be adapted to automated calibration lines, realizes unified automated calibration of all types of instrument transformers, significantly reduces the labor intensity of operators, and avoids the safety risks caused by manual operation of high-voltage terminals, ensuring that the calibration process is safe and controllable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a structural diagram of a compatible tooling pallet; Figure 3 This is another structural diagram of a compatible tooling pallet; Figure 4 This is a schematic diagram of the primary electrical automatic wiring device for voltage transformers; Figure 5 This is a schematic diagram of the structure of the primary electrical automatic wiring device for a current transformer.

[0016] Among them: 1. Automatic electrical wiring device for primary transformer, 2. Automatic electrical wiring device for secondary transformer, 3. Test and measurement device for transformer, 4. Compatible tooling tray, 5. Transformer conveying device, 401. Insulating base plate, 402. Metal grounding plate, 403. Limiting bar, 404. Limiting pin, 405. Information identification component, 406. Primary wiring terminal, 407. Conductive plate, 408. High voltage insulation device, 409. Primary connecting wire, 410. Secondary wiring terminal, 411. Secondary connecting wire. Detailed Implementation

[0017] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0018] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0019] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0020] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0021] Example: Fully compatible automated verification device for current transformers, such as Figure 1 As shown, it includes: The automatic electrical wiring device for instrument transformers includes a primary automatic electrical wiring device 1 and a secondary automatic electrical wiring device 2 for instrument transformers, which are used to automatically wire 10kV voltage and current transformers and connect them to the working circuit. The instrument transformer test and measurement device 3 is connected to the instrument transformer and measures the operating parameters of the instrument transformer; The compatible tooling tray 4 is equipped with a standardized electrical conversion interface and a modular positioning structure for placing different types of current transformers. The current transformer conveying device 5 is used to convey a compatible tooling pallet containing current transformers to the calibration station. The control device is specifically an industrial computer, which is equipped with calibration and matching software. It controls the operation of the automatic electrical wiring device for the current transformer, the testing and measuring device for the current transformer, the compatible tooling tray, and the current transformer conveying device via a PLC.

[0022] The automatic wiring device for secondary electrical components of the current transformer includes an electrical wiring module, solenoid valves, cylinders, and photoelectric sensors. The electrical wiring module, solenoid valves, cylinders, and photoelectric sensors are all connected to the control device via a PLC controller.

[0023] like Figure 4 , Figure 5As shown, the automatic primary electrical wiring device for voltage transformers includes a high-voltage primary circuit wiring mechanism and a high-voltage primary circuit experimental switching mechanism. The high-voltage primary circuit wiring mechanism includes an automatic A-pole contact crimping mechanism, an automatic B-pole contact crimping mechanism, a standard voltage transformer primary high-voltage switching mechanism, and a withstand voltage and insulation primary switching mechanism. The automatic A-pole contact crimping mechanism and the automatic B-pole contact crimping mechanism are respectively mounted on a two-axis moving platform. The servo motor controls the two-axis moving platform to adjust the positions of the A-pole contact and the B-pole contact in the X-axis and Y-axis directions, respectively.

[0024] The voltage switching logic is as follows: During the power frequency withstand voltage test, the A and B pole electrical contacts of the device are simultaneously pressed down under the control of the cylinder to make electrical contact with the high voltage busbar; the electrical contacts of the withstand voltage and insulation switching mechanism are raised under the control of the cylinder to connect with the wiring busbar.

[0025] During the insulation resistance test, the B-pole contact of the device remains in the same position, while the A-pole rises back to its initial position and disconnects from the high-voltage busbar. The contact of the withstand voltage and insulation switching mechanism descends under the control of the cylinder and makes electrical contact with the wiring terminal of the insulation resistance tester.

[0026] During the error test, the B-pole electrical contact and the withstand voltage and insulation primary switching mechanism electrical contact remain in the same position. The A-pole electrical contact is pressed down under the control cylinder to make electrical contact with the high-voltage busbar. The standard voltage transformer primary high-voltage switching mechanism electrical contact rises under the control cylinder to connect with the wiring busbar.

[0027] The automatic primary electrical wiring device for voltage transformers enables precise wiring based on the transformer type. All actions are controlled by a PLC program, combined with feedback signals from photoelectric sensors, to ensure accurate wiring. The entire process requires no manual intervention and meets the requirements of a fully automated testing process.

[0028] The automatic primary wiring device for current transformers consists of an automatic connection mechanism for high-current copper busbars and a multi-position switching module. It supports automatic connection under different transformation ratios and is compatible with current transformers with transformation ratios ranging from 5 / 5 to 2000 / 5 A. A servo motor, lead screw, and precision slider form a moving platform responsible for positioning in the horizontal X-axis and vertical Y-axis directions, controlled by a column-type pressing cylinder. The positioning and connection of the high-current floating connection platform forms the primary terminals P1 and P2 respectively. The automatic primary connection device of the current transformer adopts a flexible crimping method, that is, the force generated by the up and down movement of the crimping mechanism is not just directly pressing against the current guide plate. Instead, the pressure is applied to the springs installed above the crimping plate. The four springs can overcome the height difference between the two current guide blocks by floating up and down. Thus, as the pressure increases, the reaction force of the springs further increases the tightness of the contact between the current guide plate and the primary of the transformer. To address the problem of the fit between the upper and lower current guide plates caused by the surface roughness during the processing of the current guide plate, this invention uses 4 square millimeter multi-strand soft copper wire with silver plating process, spirally wound in a clockwise direction on the current guide copper plate to form a soft contact copper pad. During the crimping process, the copper pad is deformed after being squeezed, and it acts as a sealant between the two copper plates to increase the contact area, so that the contact resistance is ≤30uΩ and the repeatability reaches more than 99.9%. This structure effectively solves the problem of poor contact caused by the accumulation of component tolerances, while reducing the frequency of on-site maintenance. By combining floating crimping with soft contact copper pads, low-resistance and reliable connection can be achieved when current transformers of different specifications are wired in the first connection, meeting the long-term operation requirements under high voltage and high current conditions.

[0029] The automatic secondary electrical wiring device for instrument transformers includes two sub-devices: an automatic wiring device for the secondary terminals of voltage transformers and an automatic wiring device for the secondary terminals of current transformers. The instrument transformer testing and measurement device includes a voltage testing and measurement device and a current testing and measurement device. The voltage testing and measurement device is connected to the automatic secondary terminal wiring device for voltage transformers via an electrical switching device, and the current testing and measurement device is connected to the automatic secondary terminal wiring device for current transformers via the same electrical switching device. In this embodiment, the automatic secondary electrical wiring device for instrument transformers is connected to a computer via a PLC controller and has two sets of wiring mechanisms, enabling simultaneous wiring of two instrument transformers and improving verification efficiency.

[0030] The instrument transformer testing and measurement device includes a current transformer error testing device, a current transformer inter-turn insulation testing device, a voltage transformer error testing device, a voltage transformer excitation characteristic testing device, an absolute voltage withstand voltage testing device, a voltage transformer testing multi-functional electrical switching device, and a current transformer testing multi-functional electrical switching device, which is divided into voltage and current two-position testing.

[0031] The electrical wiring of voltage transformer testing devices for insulation withstand voltage, voltage error, and excitation characteristics is connected to the automatic wiring device for the secondary terminals of the transformer via a multi-functional electrical switching device, according to the test wiring requirements. Similarly, the electrical wiring of current transformer testing devices for current error and inter-turn insulation is connected to the automatic wiring device for the secondary terminals of the current transformer via a multi-functional electrical switching device, also according to the test wiring requirements. All testing devices are controlled by calibration software to automatically switch between test items. The test equipment interfaces are converted from serial port servers to network interfaces and connected to a computer, enabling automatic data acquisition and uploading.

[0032] The compatible tooling pallet comes in two models, one for State Grid standard instrument transformers and the other for user asset instrument transformers: Compatible tooling trays adapted to State Grid standard instrument transformers, such as Figure 2 As shown, the compatible tooling pallet specifically includes an insulating base plate 401, a metal grounding plate 402, a limiting stop bar 403, and an information identification component 405. The metal grounding plate, limiting stop bar, and information identification component are all mounted on the insulating base plate. The metal grounding plate is connected to the grounding mechanism to ensure the current transformer meets the grounding requirements of the insulating base plate during testing. The limiting stop bar restricts the current transformer to a fixed area on the tooling pallet. The information identification component is used to identify the type of current transformer. Specifically, the pallet base plate is made of larch wood that has been steamed and dried. The resin in larch has high anti-corrosion properties, and the wood is hard, making it resistant to deformation after steaming and drying, while also possessing electrical insulation properties. A 2mm thick stainless steel plate is installed on the wooden base plate. The bottom mounting plate of the current transformer is connected to the grounding mechanism through the stainless steel plate, ensuring the current transformer meets the grounding requirements of the base plate during high-voltage testing. A limiting stop bar is installed on the tooling plate to restrict the current transformer to a fixed area on the tooling plate, preventing it from falling during transport. The information identification component is a barcode.

[0033] Compatible tooling trays for user asset transformers, such as Figure 3As shown, the compatible tooling tray specifically includes an insulating base plate 401, a metal grounding plate 402, a high-voltage insulation device 408, a conductive plate 407, a primary terminal 406, a primary connecting wire 409, a secondary terminal 410, a secondary connecting wire 411, a limiting device, and an information identification component 405. The primary terminal is connected to the primary connecting wire via the conductive plate. The conductive plate is mounted on the high-voltage insulation device, which is mounted on the insulating base plate. The primary terminal is also connected to the automatic electrical wiring device of the current transformer, and the primary connecting wire is also connected to the primary terminal of the current transformer. The secondary terminal is connected to the secondary connecting wire, and the secondary terminal is also connected to the automatic electrical wiring device of the current transformer, and the secondary connecting wire is also connected to the secondary terminal of the current transformer. The limiting device includes a limiting pin 404 and a limiting stop 403. The cooperation of the limiting pin and the limiting stop restricts the current transformer within the fixed area of ​​the tooling tray. The information identification component is used to identify the type of current transformer. Specifically, the pallet base is also made of steamed and dried larch wood, with a 2mm thick stainless steel plate installed on top to meet the grounding requirements during high-voltage testing. The high-voltage insulating column is 320mm high and 80mm in diameter, cast with epoxy resin, and has an insulation strength exceeding 42KV. The surface of the column is machined with threads to increase the high-voltage creepage distance. Limit pins and limit bars are installed on the tooling plate to prevent the transformer from falling during transportation. Standardized electrical conversion interfaces are provided, with the pallet surface reserved with standardized conversion interfaces that match the primary / secondary automatic wiring devices. Regardless of the terminal position of the transformer itself, electrical connection can be completed through the conversion interfaces. A modular positioning structure is adopted, with built-in adjustable positioning slots and elastic limit components. Combined with a PLC-controlled electric adjustment mechanism, the positioning range can be automatically adjusted according to the diameter and height of the transformer, adapting to the physical dimensions of State Grid standards and user asset transformers. The information identification component is a barcode.

[0034] This embodiment of the automated verification items covers the power frequency withstand voltage test of primary to secondary and ground of voltage and current transformers, the power frequency withstand voltage test of secondary to ground of voltage and current transformers, the induced withstand voltage test of voltage transformers, the insulation resistance test of primary to secondary and ground of voltage and current transformers, the insulation resistance test of secondary to ground of voltage and current transformers, the error test of voltage and current transformers, the inter-turn insulation test of current transformers, the magnetic saturation margin test of current transformers, and the excitation characteristic test of voltage transformers, which can fully meet the verification requirements of 10kV voltage and current transformers.

[0035] A fully compatible automated verification method for current transformers includes the following steps: Place and fix the current transformer to be tested on the compatible tooling tray, and send the information of the current transformer to the control device; The current transformer conveyor transports the tooling pallet to the calibration station; Based on the information from the instrument transformer, the control device drives the automatic electrical wiring device of the instrument transformer to work and complete the automatic electrical wiring of the instrument transformer; at the same time, the control device obtains the test plan matching the information of the instrument transformer and controls the test measurement device of the instrument transformer to work, completes the measurement of the operating parameters of the instrument transformer and uploads the measurement parameters. The automatic electrical wiring device of the current transformer is reset and disconnected from the terminals of the current transformer. The current transformer conveying device transfers the tooling pallet to the unloading station, takes out the current transformer that has been calibrated, and completes the calibration process.

[0036] Instrument transformers include standard instrument transformers and user-general-purpose instrument transformers. For standard instrument transformers, the secondary electrical automatic wiring device automatically connects to the secondary terminals of the instrument transformer. For user-general-purpose instrument transformers, the secondary electrical automatic wiring device automatically connects to the secondary terminals.

[0037] The specific implementation process is as follows: 1. Material loading For the two different types of instrument trays, operators distinguish between State Grid instrument transformers and general user instrument transformers according to the type of instrument transformer, and place the instrument transformer to be tested on the corresponding compatible instrument tray; enter the instrument transformer information, including instrument transformer model, specifications, manufacturer, and submitting unit, through a barcode scanner, and start the verification process after the information is entered.

[0038] 2. Transfer The roller conveyor assembly of the current transformer conveying device transfers the tooling tray containing the current transformers to be calibrated to the voltage calibration station. The modular positioning mechanism of the tray automatically adjusts the position of the tray to complete the physical positioning of the current transformers and ensure accurate subsequent wiring.

[0039] 3. Automatic wiring for voltage workstations The PLC controller drives the cylinder of the automatic secondary electrical wiring device for the current transformer to complete the secondary terminal wiring. This device is compatible with two types of tooling trays. For the model 1 tray, the automatic secondary electrical wiring device automatically connects to the secondary terminals of the current transformer; for the model 2 tray, the electrical connection is completed by automatically connecting the pre-wired terminals.

[0040] Based on the transformer type (voltage / current), the PLC controller drives the transformer's primary electrical automatic wiring device to complete the primary terminal wiring. The photoelectric sensor provides real-time feedback of the wiring being in place, ensuring accurate wiring before proceeding to the subsequent testing phase.

[0041] 4. Automated testing The calibration software matches the corresponding test scheme based on the transformer information entered by barcode, controls the voltage and current transformer test measurement device to switch test circuits, and completes the preset voltage test items in sequence. During the test, various data are automatically collected and uploaded to the industrial computer to generate real-time test records.

[0042] After the current transformer completes the power frequency withstand voltage and insulation resistance tests at the voltage station, it is moved to the current test station by the conveyor line. The calibration software controls the voltage and current transformer test and measurement device to switch test circuits and complete the preset current test items in sequence. The test data is also automatically collected and uploaded.

[0043] 5. Feeding After all tests are completed, the primary / secondary automatic wiring device is reset and disconnected from the transformer terminals; the conveying device transfers the tooling pallet to the unloading station, and the operator takes out the calibrated transformer to complete the single calibration process.

[0044] Compared with the prior art, this embodiment has the following significant advantages: 1. Strong compatibility: By designing two types of compatible tooling trays, coupled with standardized electrical conversion interfaces and modular positioning structures, it can be adapted to 10kV voltage and current transformers of different models and sizes in accordance with State Grid standards and user assets. This solves the technical problem that user asset transformers cannot be adapted to automated calibration lines, and realizes automated calibration of all types of transformers.

[0045] 2. High degree of automation: The PLC and industrial computer are used for collaborative control to realize the full automation of the current transformer conveying, automatic wiring, test item switching, and data acquisition and uploading. No manual intervention is required, which reduces the labor intensity of operators and avoids the safety risks caused by manual operation.

[0046] 3. High verification efficiency: Equipped with a dual-station wiring mechanism, it can simultaneously perform wiring verification of two current transformers, meeting the needs of large-scale batch verification.

[0047] 4. Reliable calibration accuracy: The photoelectric sensor provides feedback on the wiring connection to ensure accuracy; the calibration software automatically matches the test plan to achieve automatic data acquisition, avoiding errors caused by manual reading and recording, and improving the accuracy and reliability of the calibration data.

[0048] 5. High safety: The high-voltage components use epoxy resin cast insulating pillars to increase the high-voltage creepage distance; the entire verification process does not require manual contact with the high-voltage terminals, effectively reducing the probability of electric shock and other safety accidents, and ensuring the personal safety of operators.

[0049] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.

[0050] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A fully compatible automated verification device for instrument transformers, characterized in that: include: An automatic electrical wiring device for instrument transformers is used to automatically wire instrument transformers and connect them to the working circuit. A current transformer testing and measuring device, which is connected to the current transformer and measures its operating parameters; The compatible tooling tray is equipped with a standardized electrical conversion interface and a modular positioning structure for placing different types of current transformers. A current transformer conveying device is used to transport a compatible tooling pallet containing current transformers to the calibration station; The control device is used to control the operation of the automatic electrical wiring device for instrument transformers, the instrument transformer testing and measuring device, the compatible tooling tray, and the instrument transformer conveying device.

2. The fully compatible automated verification device for current transformers according to claim 1, characterized in that, The aforementioned automatic electrical wiring device for current transformers includes an automatic electrical wiring device for secondary current transformers. The automatic electrical wiring device for secondary current transformers includes an electrical wiring module, a solenoid valve, a cylinder, and a photoelectric sensor. The electrical wiring module, solenoid valve, cylinder, and photoelectric sensor are all connected to the control device via a PLC controller.

3. The fully compatible automated verification device for current transformers according to claim 2, characterized in that, The aforementioned automatic electrical wiring device for instrument transformers also includes an automatic primary electrical wiring device for instrument transformers. This device includes an automatic primary electrical wiring device for voltage transformers and an automatic primary electrical wiring device for current transformers. The automatic primary electrical wiring device for voltage transformers includes a high-voltage primary circuit wiring mechanism and a high-voltage primary circuit experimental switching mechanism. The high-voltage primary circuit wiring mechanism includes an automatic A-pole contact crimping mechanism, an automatic B-pole contact crimping mechanism, a standard voltage transformer primary high-voltage switching mechanism, and a withstand voltage / insulation primary switching mechanism. The automatic A-pole contact crimping mechanism and the automatic B-pole contact crimping mechanism are respectively mounted on a two-axis moving platform. A servo motor controls the two-axis moving platform to adjust the positions of the A-pole and B-pole contacts in the X-axis and Y-axis directions, respectively. The automatic primary electrical wiring device for current transformers includes an automatic connection mechanism and a multi-position switching module for automatic current connection under different transformation ratios. The automatic primary electrical wiring device for current transformers is mounted on a moving platform equipped with a servo motor. The moving platform is used to adjust the positions of the automatic primary electrical wiring device for current transformers in the X-axis and Y-axis directions.

4. The fully compatible automated verification device for current transformers according to claim 2, characterized in that, The aforementioned automatic secondary electrical wiring device for instrument transformers includes two sub-devices: an automatic wiring device for the secondary terminals of voltage instrument transformers and an automatic wiring device for the secondary terminals of current instrument transformers. The instrument transformer testing and measuring device includes a voltage testing and measuring device and a current testing and measuring device. The voltage testing and measuring device is connected to the automatic wiring device for the secondary terminals of voltage instrument transformers via an electrical switching device, and the current testing and measuring device is connected to the automatic wiring device for the secondary terminals of current instrument transformers via an electrical switching device.

5. The fully compatible automated verification device for current transformers according to claim 1, characterized in that, The compatible tooling tray specifically includes an insulating base plate, a metal grounding plate, a limiting device, and an information identification component. The metal grounding plate, the limiting device, and the information identification component are all mounted on the insulating base plate. The metal grounding plate is connected to the grounding mechanism to ensure that the current transformer meets the grounding requirements of the insulating base plate during testing. The limiting device includes a limiting stop bar, which restricts the current transformer to a fixed area of ​​the tooling tray. The information identification component is used to identify the type of current transformer.

6. The fully compatible automated verification device for current transformers according to claim 1, characterized in that, The compatible tooling tray specifically includes an insulating base plate, a metal grounding plate, a high-voltage insulation device, a conductive plate, primary terminals, primary connecting wires, secondary terminals, secondary connecting wires, a limiting device, and an information identification component. The primary terminals are connected to the primary connecting wires via the conductive plate, which is mounted on the high-voltage insulation device, which is mounted on the insulating base plate. The primary terminals are also connected to the automatic electrical wiring device for the current transformer, and the primary connecting wires are also connected to the primary terminals of the current transformer. The secondary terminals are connected to the secondary connecting wires, which are also connected to the automatic electrical wiring device for the current transformer, and the secondary connecting wires are also connected to the secondary terminals of the current transformer. The limiting device includes a limiting pin and a limiting stop bar, which, through their cooperation, restrict the current transformer to a fixed area on the tooling tray. The information identification component is used to identify the type of current transformer.

7. The fully compatible automated verification device for current transformers according to claim 1, characterized in that, The aforementioned transformer is a 10kV voltage and current transformer.

8. The fully compatible automated verification device for current transformers according to claim 1, characterized in that, The control device controls the operation of the automatic electrical wiring device for the instrument transformer, the instrument transformer testing and measuring device, the compatible tooling tray, and the instrument transformer conveying device via a PLC.

9. A fully compatible automated verification method for instrument transformers, based on the fully compatible automated verification device for instrument transformers as described in any one of claims 1-8, characterized in that, Includes the following steps: Place and fix the current transformer to be tested on the compatible tooling tray, and send the information of the current transformer to the control device; The current transformer conveyor transports the tooling pallet to the calibration station; Based on the information from the instrument transformer, the control device drives the automatic electrical wiring device of the instrument transformer to work and complete the automatic electrical wiring of the instrument transformer; at the same time, the control device obtains the test plan matching the information of the instrument transformer and controls the test measurement device of the instrument transformer to work, completes the measurement of the operating parameters of the instrument transformer and uploads the measurement parameters. The automatic electrical wiring device of the current transformer is reset and disconnected from the terminals of the current transformer. The current transformer conveying device transfers the tooling pallet to the unloading station, takes out the current transformer that has been calibrated, and completes the calibration process.

10. The fully compatible automated verification method for current transformers according to claim 9, characterized in that, The aforementioned instrument transformers include standard instrument transformers and user-general-purpose instrument transformers. For standard instrument transformers, the automatic secondary electrical wiring device automatically connects to the secondary terminals of the instrument transformer. For user-general-purpose instrument transformers, the automatic secondary electrical wiring device automatically connects to the secondary terminals.

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