Converter transformer main contact electrode material performance test device and method

Abstract

The application relates to a converter transformer main contact electrode material performance test device and method, wherein the device comprises: a plurality of contact electrodes constructed by different materials, sizes and surface roughness; a mechanical sensor module; an electrical sensor module; a mechanical motion control module for adjusting a spring compression block to obtain a plurality of positive pressure values meeting preset test requirements, and switching the dynamic contact and the static contact for multiple times through an electromagnet, and reading the mechanical and electrical sensor modules to obtain the electrical parameters and the mechanical sensing data of the multiple opening and closing state switching operations of each positive pressure value corresponding to the contact electrodes constructed by each material, size and surface roughness. Thus, the problems that the prior art cannot measure and control the surface roughness of the electrode, is difficult to install the sensor equipment for measuring the main contact branch related characteristics on the actual machine, and is also difficult to adjust the related parameters of the contact closure during the operation process are solved.

Description

Technical Field

[0001] This application relates to the field of high voltage engineering technology, and in particular to a test device and method for the performance of main contact electrode materials of converter transformers. Background Technology

[0002] my country's energy and load centers exhibit an inverse distribution, and ultra-high-voltage direct current (UHVDC) transmission technology is a crucial means to address the imbalance between energy supply and demand. In UHV projects, the on-load tap changer of the converter transformer is the primary means of voltage regulation. The main contacts of the tap changer are critical components for the stable operation of the tap changer and the entire converter transformer, enabling rapid tap switching. During actual operation, phenomena such as mechanical wear, transformer oil decomposition and gas generation due to discharge, solid impurity deposition, and electrode material erosion have been observed on the main contacts of the tap changer. These phenomena pose serious threats to the normal operation of the tap changer, rapid switching, and the safe operation of the converter transformer.

[0003] When the tap changer is closed, the main contacts bear the operating current of the transformer, requiring stable contact and a resistance value below the operating requirements. During switching, the main contacts must withstand the mechanical shock and electrical stress of completing the switching process within 100 milliseconds and maintain a stable connection after switching. The electrode ablation behavior and fatigue characteristics of the tap changer main contacts significantly affect the surface morphology and steady-state contact resistance of the tap changer electrodes. Conversely, factors such as the electrode material, surface roughness, closing speed of the main contacts, and pressure after closing affect the ablation characteristics and contact resistance of the tap changer main contacts. The combined effect of these factors makes the ablation fatigue characteristics of the tap changer main contacts quite complex. The static characteristics of the tap changer main contacts, especially parameters such as contact resistance, have a significant impact on the safe and stable operation of the tap changer. Therefore, studying the aging characterization parameters of the tap changer main contact electrodes is crucial for evaluating the operating status of the tap changer and even the converter transformer.

[0004] Currently, due to structural limitations of tap changers and safety requirements for actual operation, electrodes can only be disassembled during major equipment overhauls or scrapping, making it impossible to measure and control the surface roughness of the electrodes. Furthermore, sensors used to measure the displacement, pressure, temperature, contact resistance, and other characteristics of the main contact branches cannot be installed on the actual machine. During operation, it is also difficult to adjust parameters such as the contact closing speed and pressure, making it difficult to conduct in-depth research on the static and dynamic characteristics of the tap changer's main contacts. These issues urgently need to be addressed. Summary of the Invention

[0005] This application provides a testing device and method for the performance of main contact electrode materials of a converter transformer, which solves the problems of existing technologies that cannot measure and control the surface roughness of electrodes, are difficult to install sensor equipment for measuring the relevant characteristics of the main contact branch on the actual machine, and are difficult to adjust the relevant parameters of contact closure during operation.

[0006] The first aspect of this application provides a testing device for the material performance of main contact electrodes of a converter transformer, comprising: multiple contact electrodes constructed from different materials, sizes, and surface roughnesses; a mechanical sensor module for detecting the positive pressure borne by each group of contacts when the moving and stationary contacts in at least one set of contacts in the testing device are in contact and pressed together; an electrical sensor module for measuring the electrical parameters between the stationary and moving contacts; and a mechanical motion control module for acquiring multiple positive pressure values ​​from the mechanical sensor module that meet preset test requirements, controlling the moving and stationary contacts in the at least one set of contacts to perform multiple opening and closing state switching operations, and obtaining the electrical parameters and mechanical sensing data of each contact electrode constructed from each material, size, and surface roughness under each positive pressure value during multiple opening and closing state switching operations by reading the mechanical sensor module and the electrical sensor module.

[0007] Optionally, in one embodiment of this application, it further includes: a base; and a sliding module consisting of a slide rail and a slider, used to fix the stationary contact and the moving contact by the slider, and to carry the stationary contact and the moving contact to move linearly in the slide rail to open or close the stationary contact and the moving contact.

[0008] Optionally, in one embodiment of this application, it further includes: a displacement sensor for detecting displacement changes of the moving contact and the stationary contact during the switching of the opening and closing states of the moving contact and the stationary contact; a speed sensor for detecting speed changes of the moving contact and the stationary contact during the switching of the opening and closing states of the moving contact and the stationary contact; and a temperature sensor for detecting temperature rise of a preset contact resistance during the switching of the opening and closing states of the moving contact and the stationary contact.

[0009] Optionally, in one embodiment of this application, the mechanical sensor module includes: the positive pressure sensor, used to detect the positive pressure borne on each group of contacts when the moving contact contacts and presses against the stationary contact; and a fixed bracket, used to fix the positive pressure sensor.

[0010] Optionally, in one embodiment of this application, the electrical sensor module includes: a four-electrode low-resistance tester; an AC high-current generator for simulating and measuring the current information in the electrical parameters corresponding to each group of contacts during the operation of a preset tap changer; and a voltage sensor for simulating and measuring the voltage information in the electrical parameters corresponding to each group of contacts during the operation of a preset tap changer.

[0011] Optionally, in one embodiment of this application, the mechanical motion control module includes: a spring and a spring support; a screw for pulling the moving contact to perform linear motion via an electromagnet in the mechanical motion control module; the electromagnet for pulling the screw to cause the moving contact in each group of contacts to open or close with the stationary contact; and a spring compression block for adjusting the distance between itself and the spring support to adjust the positive pressure between the stationary contact and the moving contact.

[0012] A second aspect of this application provides a method for testing the material performance of main contact electrodes of a converter transformer, comprising the following steps: constructing multiple contact electrodes of different materials, sizes, and surface roughnesses, and constructing at least one set of contacts corresponding to the multiple contact electrodes of different materials, sizes, and surface roughnesses; when the moving contact and the stationary contact in the at least one set of contacts come into contact and are pressed together, detecting the positive pressure borne by each set of contacts, and measuring the electrical parameters between the stationary contact and the moving contact; adjusting a preset spring compression block to obtain multiple positive pressure values ​​that meet preset test requirements, and controlling the moving contact and the stationary contact in the at least one set of contacts to perform multiple opening and closing state switching operations, so as to obtain the electrical parameters and mechanical sensing data of the multiple opening and closing state switching operations under each positive pressure value corresponding to each contact electrode constructed with each material, size, and surface roughness.

[0013] A third aspect of this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the test method for the performance of the main contact electrode material of the converter transformer as described in the above embodiments.

[0014] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for testing the performance of the main contact electrode material of a converter transformer.

[0015] A fifth aspect of this application provides a computer program product, including a computer program that is executed to implement the above-described method for testing the performance of the main contact electrode material of a converter transformer.

[0016] Therefore, the embodiments of this application have the following beneficial effects:

[0017] Embodiments of this application may include multiple contact electrodes constructed from different materials, sizes, and surface roughnesses; a mechanical sensor module for detecting the normal pressure borne by each group of contacts when the moving and stationary contacts in at least one pre-set group of contacts in the test apparatus come into contact and press against each other; an electrical sensor module for measuring electrical parameters between the stationary and moving contacts; and a mechanical motion control module for acquiring multiple normal pressure values ​​from the mechanical sensor module that meet preset test requirements, and controlling the moving and stationary contacts in at least one group of contacts to perform multiple opening and closing state switching operations. Furthermore, by reading from the mechanical sensor module and the electrical sensor module, the electrical parameters and mechanical sensing data during multiple opening and closing state switching operations corresponding to each normal pressure value of the contact electrodes constructed from each material, size, and surface roughness can be obtained. This application can not only measure the static contact resistance of the tap changer main contact electrodes and the electrical stress during dynamic switching, but also measure the pressure, displacement, speed, and temperature of the tap changer main contacts. Simultaneously, it can control the mechanical parameters such as the contact closing speed and pressure, thereby providing experimental data support for the study of the ablation aging characteristics of the main contacts. This solves the problems of existing technologies being unable to measure and control the surface roughness of electrodes, the difficulty in installing sensor equipment to measure the relevant characteristics of the main contact branch on actual machines, and the difficulty in adjusting parameters such as the contact closing speed and pressure during operation.

[0018] Additional aspects and advantages of this application 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 this application. 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:

[0020] Figure 1 This is an example diagram of a test apparatus for the performance of main contact electrode materials of a converter transformer according to an embodiment of this application;

[0021] Figure 2 A schematic diagram of the topology connection of a test apparatus for the performance of main contact electrode materials of a converter transformer, provided as an embodiment of this application;

[0022] Figure 3 A front view of a test apparatus for the performance of main contact electrode materials of a converter transformer, provided as an embodiment of this application;

[0023] Figure 4 This is a flowchart illustrating a test method for the performance of main contact electrode materials of a converter transformer according to an embodiment of this application.

[0024] Figure 5This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0025] Among them, 10-Test device for the material performance of converter transformer main contact electrode; 1-Stationary contact, 2-Moving contact, 100-Contact electrode, 101-Stationary contact electrode, 102-Stationary contact electrode terminal, 103-Stationary contact electrode bearing component, 104-Moving contact electrode, 105-Moving contact electrode terminal, 106-Moving contact electrode bearing component; 200-Mechanical sensor module, 201-Positive pressure sensor, 202-Fixed bracket; 3-Sliding module, 31-Stationary contact slider, 32-Moving contact slider, 33-Slide rail; 300-Electrical sensor module; 4-Base; 400-Mechanical motion control module, 401-Spring, 402-Screw, 403-Spring compression block, 404-Spring bracket, 405-Electromagnet; 501-Memory, 502-Processor, 503-Communication interface. Detailed Implementation

[0026] The embodiments of this application are described in detail below. Examples of these embodiments are shown 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 this application, and should not be construed as limiting this application.

[0027] The following description, with reference to the accompanying drawings, describes a testing apparatus and method for the performance of converter transformer main contact electrode materials according to embodiments of this application. To address the problems mentioned in the background art, this application provides a testing apparatus for the performance of converter transformer main contact electrode materials. This apparatus includes multiple contact electrodes constructed from different materials, sizes, and surface roughnesses; a mechanical sensor module for detecting the normal pressure borne by each group of contacts when the moving and stationary contacts in at least one preset group of contacts come into contact and press against each other; an electrical sensor module for measuring electrical parameters between the stationary and moving contacts; and a mechanical motion control module for acquiring multiple normal pressure values ​​from the mechanical sensor module that meet preset test requirements, controlling the moving and stationary contacts in at least one group of contacts to perform multiple opening and closing state switching operations, and obtaining electrical parameters and mechanical sensing data for each normal pressure value corresponding to each contact electrode constructed from each material, size, and surface roughness during multiple opening and closing state switching operations by reading from the mechanical sensor module and the electrical sensor module. This application can not only measure the static contact resistance of the tap changer main contact electrodes and the electrical stress during dynamic switching, but also measure the pressure, displacement, speed, and temperature of the tap changer main contacts. Simultaneously, it can control mechanical parameters such as the contact closing speed and pressure, thus providing experimental data support for the study of the ablation and aging characteristics of the main contacts. This solves the problems of existing technologies, such as the inability to measure and control the surface roughness of electrodes, the difficulty in installing sensor equipment to measure the relevant characteristics of the main contact branch on actual machines, and the difficulty in adjusting parameters such as the contact closing speed and pressure during operation.

[0028] Specifically, Figure 1 This is a block diagram of a test apparatus for the performance of converter transformer main contact electrode materials according to an embodiment of this application.

[0029] like Figure 1 As shown, the converter transformer main contact electrode material performance testing device 10 includes: multiple contact electrodes 100, a mechanical sensor module 200, an electrical sensor module 300, and a mechanical motion control module 400.

[0030] Among them, there are multiple contact electrodes 100 constructed from different materials, sizes and surface roughness.

[0031] It should be noted that the contacts in the embodiments of this application include a stationary contact 1 and a moving contact 2. The stationary contact 1 is composed of a stationary contact electrode 101, a stationary contact electrode terminal 102 and a stationary contact electrode support component 103, and the moving contact 2 is composed of a moving contact electrode 104, a moving contact electrode terminal 105 and a moving contact electrode support component 106.

[0032] In embodiments of this application, multiple contact electrodes (including a stationary contact electrode 101 and a moving contact electrode 104) can be constructed based on different materials, sizes, and surface roughness, such as... Figure 2 As shown, the contact electrode can be fixed on the electrode support component, which provides a stable mechanical connection and electrical insulation between the contact electrode and subsequent motion mechanisms, etc.

[0033] In specific implementation, the embodiments of this application may also add a quick-release device to the contacts, so that the contact electrodes can be quickly installed and removed, thereby facilitating the replacement of contact electrodes of different materials and different surface roughness.

[0034] Optionally, in one embodiment of this application, the converter transformer main contact electrode material performance testing device 10 of this application embodiment further includes: a base 4 and a sliding module 3.

[0035] Among them, base 4.

[0036] The sliding module 3, consisting of a slide rail 33 and a slider, is used to fix the stationary contact 1 and the moving contact 2 by means of the slider, and to carry the stationary contact 1 and the moving contact 2 to move linearly in the slide rail 33, so as to open or close the stationary contact 1 and the moving contact 2.

[0037] In the embodiments of this application, the converter transformer main contact electrode material performance testing device 10 further includes a base 4 and a sliding module 3.

[0038] The base 4 can be used to fix other components such as contacts and slide rails 33.

[0039] The sliding mechanism 3 (i.e., the sliding module) includes a slide rail 33 and a slider. There are two sliders, namely a stationary contact slider 31 and a moving contact slider 32, which are used to fix the stationary contact 1 and the moving contact 2 respectively. The slider can carry the stationary contact 1 and the moving contact 2 to slide linearly on the slide rail 33, so that the stationary contact 1 and the moving contact 2 can open and close. The slide rail 33 is fixed on the base and remains reliably stationary.

[0040] In actual implementation, the embodiments of this application should maintain a low frictional force between the slide rail 33 and the slider, so as to facilitate the free movement of the contact.

[0041] The mechanical sensor module 200 is used to detect the positive pressure borne by each set of contacts when the moving contact 2 and the stationary contact 1 of at least one set of contacts in the test device 10 come into contact and press together.

[0042] Furthermore, embodiments of this application also include a force sensor mechanism 200 (i.e., a force sensor module) to detect the positive pressure borne by each group of contacts when the moving contact 2 and the stationary contact 1 in the contacts come into contact and press against each other.

[0043] Optionally, in one embodiment of this application, the force sensor module 200 includes: a positive pressure sensor 201 and a fixed bracket 202.

[0044] Among them, the positive pressure sensor 201 is used to detect the positive pressure on each group of contacts when the moving contact 2 contacts and presses against the stationary contact 1.

[0045] The mounting bracket 202 is used to fix the positive pressure sensor 201.

[0046] Specifically, the mechanical sensor module 200 in this embodiment mainly includes a positive pressure sensor 201 and a fixed bracket 202.

[0047] The fixed bracket 202 can be used to fix the positive pressure sensor 201. After the positive pressure sensor 201 is fixed to the stationary contact 1, when the moving contact 2 contacts and presses against the stationary contact 1, the positive pressure sensor 201 can measure the positive pressure on the contact.

[0048] The electrical sensor module 300 is used to measure the electrical parameters between the stationary contact 1 and the moving contact 2.

[0049] Furthermore, embodiments of this application may also construct an electrical sensor mechanism 300 (i.e., an electrical sensor module) and connect it to the contact terminal block to measure electrical parameters such as the contact resistance between the stationary contact 1 and the moving contact 2.

[0050] Optionally, in one embodiment of this application, the electrical sensor module 300 includes: a four-electrode low-resistance tester, an AC high-current generator, and a voltage sensor.

[0051] Among them is the four-electrode method low resistance tester.

[0052] An AC high-current generator is used to simulate and measure the current information in the electrical parameters corresponding to each group of contacts during the operation of a preset tap changer.

[0053] A voltage sensor is used to simulate and measure the voltage information in the electrical parameters corresponding to each group of contacts during the operation of a preset tap changer.

[0054] It should be noted that, in the embodiments of this application, the electrical sensor mechanism 300 may be composed of a four-electrode low-resistance tester, an AC high-current generator, or a voltage sensor, etc., so as to simulate and measure the electrical stress such as current and voltage on the contacts during the actual operation of the tap changer.

[0055] The mechanical motion control module 400 is used to acquire multiple positive pressure values ​​that meet the preset test requirements from the mechanical sensor module 200, and control the moving contact 2 and the stationary contact 1 in at least one set of contacts to perform multiple opening and closing state switching operations. It also reads the mechanical sensor module 200 and the electrical sensor module 300 to obtain the electrical parameters and mechanical sensing data of the contact electrodes constructed with each material, size and surface roughness for each positive pressure value during multiple opening and closing state switching operations.

[0056] Subsequently, the embodiments of this application also need to construct a mechanical motion control mechanism 400 (i.e., a mechanical motion control module), which obtains multiple positive pressure values ​​in the mechanical sensor module 200 that meet the preset test requirements by adjusting the spring compression block 403, and controls the moving contact 2 and the stationary contact 1 in the contacts to perform multiple opening and closing state switching operations by using an electromagnet 405. At the same time, the mechanical sensor module 200 and the electrical sensor module 300 are read to obtain the electrical parameters and mechanical sensing data of the contact electrodes constructed with each material, size and surface roughness under each positive pressure value during multiple opening and closing state switching operations.

[0057] Optionally, in one embodiment of this application, the mechanical motion control module 400 includes: a spring 401, a spring bracket 404, a screw 402, an electromagnet 405, and a spring compression block 403.

[0058] Among them, spring 401 and spring bracket 404.

[0059] The screw 402 is used to pull the moving contact 2 to perform linear motion via the electromagnet 405 in the mechanical motion control module 400.

[0060] Electromagnet 405 is used to pull screw 402 so that the moving contact 2 in each group of contacts can open or close with the stationary contact 1.

[0061] The spring compression block 403 is used to adjust the distance between itself and the spring support 404 to adjust the positive pressure between the stationary contact 1 and the moving contact 2.

[0062] Specifically, the mechanical motion control mechanism 400 in this application embodiment mainly includes a screw 402, a spring 401, a spring compression block 403, a spring bracket 404, an electromagnet 405, etc.

[0063] Among them, such as Figure 3 As shown, the screw 402 is fixed between the moving contact 2 and the electromagnet 405, so that the electromagnet 405 can pull the moving contact 2 to perform linear motion; the spring 401 passes through the screw 402, and its two ends are limited by the spring compression block 403 and the spring bracket 404 respectively; the spring compression block 403 and the screw 402 remain stationary, and the spring bracket 404 is fixed on the base 4.

[0064] In the embodiments of this application, the electromagnet 405 can be controlled by a computer and can automatically conduct tests in conjunction with the mechanical sensor mechanism 200 and the electrical sensor mechanism 300.

[0065] It should be noted that the spring compression block 403 is threaded onto the screw 402, which not only ensures that the spring compression block 403 can move back and forth, but also ensures that the spring compression block 403 will not slip when subjected to axial positive pressure, so that the pressure on the contact is stable and adjustable. In addition, there is a linear bearing between the spring support 404 and the screw 402, which not only ensures that the spring support 404 and the screw 402 can make stable axial movements, but also reduces radial displacement and axial friction.

[0066] In actual implementation, the embodiments of this application can adjust the compression of the spring 401 by adjusting the distance between the spring compression block 403 and the spring bracket 404, thereby adjusting the positive pressure between the stationary contact 1 and the moving contact 2.

[0067] Optionally, in one embodiment of this application, the converter transformer main contact electrode material performance testing device 10 further includes: a displacement sensor, a speed sensor, and a temperature sensor.

[0068] The displacement sensor is used to detect the displacement changes of the moving contact 2 and the stationary contact 1 during the switching of the opening and closing states of the moving contact 2 and the stationary contact 1.

[0069] A speed sensor is used to detect the speed changes of the moving contact 2 and the stationary contact 1 during the switching of their open and closed states.

[0070] A temperature sensor is used to detect the temperature rise of the preset contact resistance during the switching of the opening and closing states of the moving contact 2 and the stationary contact 1.

[0071] As one possible approach, the converter transformer main contact electrode material performance testing device 10 of this application embodiment may further include a displacement sensor, a velocity sensor and a temperature sensor, to measure the displacement and velocity changes of the moving contact 2 and the stationary contact 1 during the switching process, as well as the temperature rise information caused by Joule heat generated in parts such as contact resistance.

[0072] In summary, the embodiments of this application can not only measure the static contact resistance of the tap changer main contact electrode and the electrical stress during dynamic switching, but also measure the pressure, displacement, speed and even temperature of the tap changer main contact, and control the mechanical parameters such as the contact closing speed and pressure, thereby providing experimental data support for the study of the ablation aging characteristics of the main contact.

[0073] The converter transformer main contact electrode material performance testing device according to the embodiments of this application includes multiple contact electrodes 100 constructed from different materials, sizes, and surface roughnesses; a mechanical sensor module 200, used to detect the positive pressure borne by each group of contacts when the moving contact 2 and the stationary contact 1 in at least one group of contacts in the testing device 10 come into contact and are pressed together; an electrical sensor module 300, used to measure the electrical parameters between the stationary contact 1 and the moving contact 2; and a mechanical motion control module 400, used to acquire multiple positive pressure values ​​that meet the preset test requirements from the mechanical sensor module, and control the moving contact 2 and the stationary contact 1 in at least one group of contacts to perform multiple opening and closing state switching operations, and to obtain the electrical parameters and mechanical sensing data of the contact electrodes constructed from each material, size, and surface roughness under each positive pressure value during multiple opening and closing state switching operations by reading the mechanical sensor module and the electrical sensor module. This application can not only measure the static contact resistance of the tap changer main contact electrodes and the electrical stress during dynamic switching, but also measure the pressure, displacement, speed and temperature of the tap changer main contacts. At the same time, it can also control the mechanical parameters such as the contact closing speed and pressure, thereby providing experimental data support for the study of the ablation and aging characteristics of the main contacts.

[0074] Secondly, with reference to the accompanying drawings, a test method for the performance of the main contact electrode material of the converter transformer according to an embodiment of this application is described.

[0075] Figure 4 This is a flowchart illustrating a test method for the performance of main contact electrode materials of a converter transformer, provided in an embodiment of this application.

[0076] like Figure 4 As shown, the test method for the performance of the main contact electrode material of the converter transformer includes the following steps:

[0077] In step S401, multiple contact electrodes of different materials, sizes and surface roughness are constructed, and at least one set of contacts is constructed using multiple contact electrodes of different materials, sizes and surface roughness.

[0078] In step S402, when the moving contact and stationary contact in at least one set of contacts come into contact and press together, the positive pressure borne by each set of contacts is detected, and the electrical parameters between the stationary contact and the moving contact are measured.

[0079] In step S403, the preset spring compression block is adjusted to obtain multiple positive pressure values ​​that meet the preset test requirements, and the moving and stationary contacts in at least one group of contacts are controlled to perform multiple opening and closing state switching operations to obtain electrical parameters and mechanical sensing data of multiple opening and closing state switching operations under each positive pressure value for each contact electrode constructed with each material, size and surface roughness.

[0080] The following example illustrates the execution logic of the test method for the performance of the main contact electrode material of the converter transformer of this application.

[0081] The execution process of the test method for the performance of the main contact electrode material of the converter transformer in this application is as follows:

[0082] S1: Manufacture contact electrodes, control the material, size and surface roughness of the contact electrodes, or use the contact electrodes of the actual tap changer as contact electrodes; drill holes and tap the contact electrodes to facilitate the connection of the contacts with the mechanical motion control mechanism and the contact electrode terminals;

[0083] S2: The fixed contact electrode and the contact electrode bearing component form a complete contact that is insulated from the base and sliding mechanism;

[0084] S3: Adjust the spring compression block until the reading of the positive pressure sensor in the mechanical sensor mechanism reaches the preset positive pressure value of the test;

[0085] S4: Activate the electromagnet in the mechanical motion control mechanism so that the electromagnet pulls the screw, causing the moving contact in the contacts to open and close with the stationary contact in the contacts. Record and collect electrical and mechanical sensing data through the electrical sensing mechanism and the mechanical sensor mechanism.

[0086] S5: Repeat S4 to obtain the cumulative electrical and mechanical sensing data under different closure counts;

[0087] S6: Repeat S3 and S5 to obtain electrical and mechanical sensing data under different pressures;

[0088] S7: Repeat S1 to S6 to obtain electrical and mechanical sensing data under different electrode materials and electrode surface roughness.

[0089] In specific implementation, the embodiments of this application can construct an electrical sensing mechanism by using an AC high current generator and a voltage sensor to adjust the current of the high current generator in the above S3, thereby obtaining electrical and mechanical sensing data under different current conditions.

[0090] It is understood that the embodiments of this application can effectively measure the static contact resistance of the contacts, the transient electrical stress of the contacts during dynamic switching, and the static pressure of the contacts and the pressure changes during switching. In addition, the embodiments of this application can also conveniently adjust and control the positive pressure of the contacts during measurement, thereby simulating the electrical characteristics of the contact electrodes under different pressures.

[0091] It should be noted that the foregoing explanation of the embodiment of the test device for the performance of the main contact electrode material of the converter transformer also applies to the test method for the performance of the main contact electrode material of the converter transformer in this embodiment, and will not be repeated here.

[0092] According to the test method for the material performance of converter transformer main contact electrodes proposed in this application, multiple contact electrodes of different materials, sizes, and surface roughness are constructed, and at least one set of contacts is constructed accordingly using these electrodes. When the moving and stationary contacts in the at least one set of contacts come into contact and press against each other, the normal pressure borne by each set of contacts is detected, and the electrical parameters between the stationary and moving contacts are measured. A preset spring compression block is adjusted to obtain multiple normal pressure values ​​that meet preset test requirements, and the moving and stationary contacts in the at least one set of contacts are controlled to perform multiple opening and closing state switching operations to obtain the electrical parameters and mechanical sensing data of multiple opening and closing state switching operations under each normal pressure value corresponding to each material, size, and surface roughness of the contact electrodes. This application can not only measure the static contact resistance of the tap changer main contact electrodes and the electrical stress during dynamic switching, but also measure the pressure, displacement, speed, and temperature of the tap changer main contacts. It can also control the mechanical parameters such as the contact closing speed and pressure, thereby providing experimental data support for the study of the ablation aging characteristics of the main contacts.

[0093] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device may include:

[0094] The memory 501, the processor 502, and the computer program stored on the memory 501 and capable of running on the processor 502.

[0095] When the processor 502 executes the program, it implements the test method for the performance of the main contact electrode material of the converter transformer provided in the above embodiments.

[0096] Furthermore, electronic devices also include:

[0097] Communication interface 503 is used for communication between memory 501 and processor 502.

[0098] The memory 501 is used to store computer programs that can run on the processor 502.

[0099] The memory 501 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0100] If the memory 501, processor 502, and communication interface 503 are implemented independently, then the communication interface 503, memory 501, and processor 502 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 5 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0101] Optionally, in a specific implementation, if the memory 501, processor 502, and communication interface 503 are integrated on a single chip, then the memory 501, processor 502, and communication interface 503 can communicate with each other through an internal interface.

[0102] Processor 502 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0103] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the above-described method for testing the performance of the main contact electrode material of a converter transformer.

[0104] This application also provides a computer program product, including a computer program, which, when executed, is used to implement the above-described test method for the performance of the main contact electrode material of the converter transformer.

[0105] 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.

[0106] 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, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0107] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N 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.

[0108] 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 by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0109] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. 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.

[0110] Those skilled in the art will understand that all or part of the steps of the methods 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, the program includes one or a combination of the steps of the method embodiments.

[0111] 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.

[0112] 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 testing device for the performance of main contact electrode materials of a converter transformer, characterized in that, include: Multiple contact electrodes constructed from different materials, sizes, and surface roughness; A mechanical sensor module is used to detect the positive pressure borne by each set of contacts when the moving and stationary contacts of at least one set of contacts in the test device come into contact and press against each other. An electrical sensor module is used to measure electrical parameters between the stationary contact and the moving contact; The mechanical motion control module is used to acquire multiple positive pressure values ​​that meet the preset test requirements from the mechanical sensor module, and control the moving contact and stationary contact in the at least one set of contacts to perform multiple opening and closing state switching operations. It also reads the mechanical sensor module and the electrical sensor module to obtain the electrical parameters and mechanical sensing data of the contact electrodes constructed with each material, size and surface roughness for each positive pressure value during multiple opening and closing state switching operations. The mechanical motion control module includes: Springs and spring supports; The screw is used to pull the moving contact to perform linear motion via an electromagnet in the mechanical motion control module; The electromagnet is used to pull the screw so that the moving contact in each group of contacts can open or close with the stationary contact. A spring compression block is used to adjust the distance between itself and the spring support to adjust the positive pressure between the stationary contact and the moving contact.

2. The apparatus according to claim 1, characterized in that, Also includes: Base; A sliding module consisting of a slide rail and a slider is used to fix the stationary contact and the moving contact via the slider, and to carry the stationary contact and the moving contact to move linearly in the slide rail to open or close the stationary contact and the moving contact.

3. The apparatus according to claim 1, characterized in that, Also includes: A displacement sensor is used to detect the displacement changes of the moving contact and the stationary contact during the switching of the opening and closing states of the moving contact and the stationary contact. A speed sensor is used to detect the speed change information of the moving contact and the stationary contact during the switching of the opening and closing states of the moving contact and the stationary contact; A temperature sensor is used to detect the temperature rise of the preset contact resistance during the switching of the opening and closing states of the moving contact and the stationary contact.

4. The apparatus according to claim 1, characterized in that, The mechanical sensor module includes: A positive pressure sensor is used to detect the positive pressure borne on each group of contacts when the moving contact contacts and presses against the stationary contact; A mounting bracket is used to fix the positive pressure sensor.

5. The apparatus according to claim 1, characterized in that, The electrical sensor module includes: Four-electrode method low resistance tester; An AC high-current generator is used to simulate and measure the current information in the electrical parameters corresponding to each group of contacts during the operation of a preset tap changer; A voltage sensor is used to simulate and measure the voltage information in the electrical parameters corresponding to each group of contacts during the operation of a preset tap changer.

6. A test method for the performance of main contact electrode materials of a converter transformer, characterized in that, Includes the following steps: Construct multiple contact electrodes of different materials, sizes and surface roughness, and construct at least one corresponding set of contacts using the multiple contact electrodes of different materials, sizes and surface roughness; When the moving contact and the stationary contact in the at least one set of contacts come into contact and press against each other, the positive pressure borne by each set of contacts is detected, and the electrical parameters between the stationary contact and the moving contact are measured. Adjust the preset spring compression block to obtain multiple positive pressure values ​​that meet the preset test requirements, and control the moving contact and stationary contact in the at least one set of contacts to perform multiple opening and closing state switching operations, so as to obtain the electrical parameters and mechanical sensing data of the contact electrodes constructed with each material, size and surface roughness under each positive pressure value during multiple opening and closing state switching operations.

7. An electronic device, characterized in that, include: The system includes a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the test method for the performance of the main contact electrode material of the converter transformer as described in claim 6.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the test method for the performance of the main contact electrode material of the converter transformer as described in claim 6.

9. A computer program product, comprising a computer program, characterized in that, The computer program is executed to implement the test method for the performance of the main contact electrode material of the converter transformer as described in claim 6.

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