Device and method for testing performance of main contact electrode material of converter transformer

Abstract

The invention relates to a converter transformer main contact electrode material performance test device and method, and the device comprises a plurality of contact electrodes which are constructed by different materials, sizes and surface roughness; a mechanical sensor module; an electrical sensor module; the mechanical motion control module is used for adjusting a spring compression block to obtain a plurality of positive pressure values meeting preset test requirements, controlling a moving contact and a static contact to perform multiple opening and closing switching through an electromagnet, and reading mechanical and electrical sensor modules; and obtaining electrical parameters and mechanical sensing data of the contact electrode constructed by each material, size and surface roughness under each positive pressure value during multiple opening and closing state switching operations. Therefore, the problems that in the prior art, the surface roughness of an electrode cannot be measured and controlled, sensor equipment for measuring the relevant characteristics of a main contact branch is difficult to install on a real machine, and relevant parameters of contact closing are difficult to adjust in the operation process are solved.

Description

Technical Field

[0001] The present application relates to the field of high voltage engineering technology, and in particular to a device and method for testing the performance of main contact electrode materials of a converter transformer. Background Art

[0002] my country's energy and load centers are distributed inversely, and UHV DC transmission technology is an important means to solve the regional imbalance between energy and demand. In UHV projects, the on-load voltage-changing tap changer of the converter transformer is the main means of voltage regulation of the converter transformer. Among them, the main contact of the tap changer is one of the important components for the stable operation of the tap changer and the entire converter transformer, as well as the rapid switching of the tap position. In the actual operation process, mechanical wear, transformer oil decomposition and gas production caused by discharge, solid impurity deposition, and electrode material ablation were observed on the main contacts of the tap changer. These phenomena have caused serious hidden dangers to the normal operation of the tap changer, rapid switching, and safe operation of the converter transformer.

[0003] The main contact of the tap changer bears the operating current of the transformer when the tap changer remains connected, requiring the contact of the main contact to be stable and the resistance value to be lower than the operating requirements; during the switching process, the main contact of the tap changer needs to withstand the mechanical impact and electrical stress of the switching process within 100 milliseconds, and continue to maintain a stable connection after the switching. The electrode ablation behavior and fatigue characteristics of the tap changer main contact have an important influence on the surface morphology of the tap changer electrode, the steady-state contact resistance of the electrode, and other characteristics. The material, surface roughness, closing speed of the main contact, and pressure after closing of the contact electrode will in turn affect the ablation characteristics and contact resistance of the tap changer main contact. The combined effect of these factors will make the ablation fatigue characteristics of the tap changer main contact more complicated. The static characteristics of the tap changer main contact, especially the parameters such as contact resistance, have a great influence on the safe and stable operation of the tap changer. Therefore, studying the aging characterization parameters of the tap changer main contact electrode is also very important for evaluating the operating status of the tap changer and even the converter transformer.

[0004] At present, due to the structural limitations of the tap changer and the safety requirements of the actual machine operation, the electrodes can only be disassembled when the equipment is overhauled or scrapped, and the surface roughness of the electrodes cannot be measured and controlled; and the sensors used to measure the displacement, pressure, temperature, contact resistance and other characteristics of the main contact branch cannot be installed on the actual machine. It is also difficult to adjust the speed, pressure and other parameters of the contact closure during the operation of the actual machine, making it difficult to conduct in-depth research on the static and dynamic characteristics of the main contacts of the tap changer, which needs to be solved urgently. Summary of the invention

[0005] The present application provides a device and method for testing the performance of the main contact electrode materials of a converter transformer to solve the problems that the prior art cannot measure and control the surface roughness of the electrode, it is difficult to install sensor equipment for measuring the relevant characteristics of the main contact branch on the actual machine, and it is also difficult to adjust the relevant parameters of the contact closure during operation.

[0006] The first aspect of the present application provides a material performance test device for the main contact electrode of a converter transformer, comprising: a plurality of contact electrodes constructed of different materials, sizes and surface roughnesses; a mechanical sensor module, used to detect the positive pressure borne by each group of contacts when the moving contacts and the static contacts in at least one group of contacts preset in the test device are in contact and pressed; an electrical sensor module, used to measure the electrical parameters between the static contact and the moving contact; a mechanical motion control module, used to obtain a plurality of positive pressure values ​​in the mechanical sensor module that meet the preset test requirements, and control the moving contacts and the static contacts in the at least one group of contacts to perform multiple open and close state switching operations, and by reading the mechanical sensor module and the electrical sensor module, the electrical parameters and mechanical sensing data of the multiple open and close state switching operations under each positive pressure value corresponding to the contact electrode constructed of each material, size and surface roughness can be obtained.

[0007] Optionally, in one embodiment of the present application, it also includes: a base; a sliding module composed of a slide rail and a slider, used to fix the static contact and the moving contact through the slider, and carry the static contact and the moving contact to perform linear motion in the slide rail to open or close the static contact and the moving contact.

[0008] Optionally, in one embodiment of the present application, it also includes: a displacement sensor for detecting displacement change information of the moving contact and the static contact during the switching of the opening and closing states of the moving contact and the static contact; a speed sensor for detecting speed change information of the moving contact and the static contact during the switching of the opening and closing states of the moving contact and the static contact; and a temperature sensor for detecting temperature rise information of a preset contact resistance during the switching of the opening and closing states of the moving contact and the static contact.

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

[0010] Optionally, in one embodiment of the present application, the electrical sensor module includes: a four-electrode low resistance tester; an AC high current generator, 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 switch; and a voltage sensor, 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 switch.

[0011] Optionally, in one embodiment of the present application, the mechanical motion control module includes: a spring and a spring bracket; a screw rod, used to pull the moving contact to perform linear motion through an electromagnet in the mechanical motion control module; the electromagnet is used to pull the screw rod so that the moving contact in each group of contacts is disconnected or closed with the static contact; and a spring compression block is used to adjust the distance between it and the spring bracket to adjust the positive pressure between the static contact and the moving contact.

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

[0013] The third aspect of the present application provides an electronic device, comprising: 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 converter transformer main contact electrode material performance test method as described in the above embodiment.

[0014] A fourth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, which, when executed by a processor, implements the above-mentioned converter transformer main contact electrode material performance test method.

[0015] A fifth aspect of the present application provides a computer program product, including a computer program, which is executed to implement the above-mentioned converter transformer main contact electrode material performance test method.

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

[0017] The embodiments of the present application may include a plurality of contact electrodes constructed of different materials, sizes and surface roughnesses; a mechanical sensor module for detecting the positive pressure borne by each group of contacts when the moving contact and the static contact in at least one group of contacts preset in the test device are in contact and pressed; an electrical sensor module for measuring the electrical parameters between the static contact and the moving contact; a mechanical motion control module for obtaining a plurality of positive pressure values ​​that meet the preset test requirements in the mechanical sensor module, and controlling the moving contact and the static contact in at least one group of contacts to perform multiple open and close state switching operations, and by reading the mechanical sensor module and the electrical sensor module, the electrical parameters and mechanical sensing data of the multiple open and close state switching operations corresponding to each positive pressure value of the contact electrode constructed of each material, size and surface roughness can be obtained. The present application can not only measure the static contact resistance of the main contact electrode of the tap switch and the electrical stress during dynamic switching, but also measure the pressure, displacement, speed and temperature of the main contact of the tap switch, and can also control the mechanical parameters such as the speed and pressure of the contact closure, thereby providing experimental data support for the study of the ablation aging characteristics of the main contact. This solves the problems that the prior art cannot measure and control the surface roughness of the electrode, it is difficult to install sensor equipment for measuring the relevant characteristics of the main contact branch on the actual machine, and it is also difficult to adjust parameters such as the speed and pressure of contact closing during operation.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 This is an exemplary diagram of a converter transformer main contact electrode material performance test device according to an embodiment of the present application;

[0021] Figure 2 A topological connection diagram of a converter transformer main contact electrode material performance test device provided in one embodiment of the present application;

[0022] Figure 3 A front view of a converter transformer main contact electrode material performance test device provided in one embodiment of the present application;

[0023] Figure 4 A flow chart of a method for testing the performance of a main contact electrode material of a converter transformer provided according to an embodiment of the present application;

[0024] Figure 5A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0025] Among them, 10-converter transformer main contact electrode material performance test device; 1-static contact, 2-moving contact, 100-contact electrode, 101-static contact electrode, 102-static contact electrode terminal, 103-static 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-static 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 DESCRIPTION

[0026] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0027] The following describes the material performance test device and method of the main contact electrode of the converter transformer of the embodiment of the present application with reference to the accompanying drawings. In view of the problems mentioned in the above background technology, the present application provides a material performance test device for the main contact electrode of the converter transformer, in which a plurality of contact electrodes constructed of different materials, sizes and surface roughness are included; a mechanical sensor module, which is used to detect the positive pressure borne by each group of contacts when the moving contact and the static contact in at least one group of contacts preset in the test device are in contact and pressed; an electrical sensor module, which is used to measure the electrical parameters between the static contact and the moving contact; a mechanical motion control module, which is used to obtain multiple positive pressure values ​​that meet the preset test requirements in the mechanical sensor module, and control the moving contact and the static contact in at least one group of contacts to perform multiple open and close state switching operations, and by reading the mechanical sensor module and the electrical sensor module, the electrical parameters and mechanical sensing data of the multiple open and close state switching operations under each positive pressure value corresponding to the contact electrode constructed of each material, size and surface roughness are obtained. This application can not only measure the static contact resistance of the tap switch main contact electrode and the electrical stress during dynamic switching, but also measure the pressure, displacement, speed and temperature of the tap switch main contact, and can also control mechanical parameters such as the speed and pressure of the contact closure, thereby providing experimental data support for the study of the ablation aging characteristics of the main contact. Thus, the existing technology is unable to measure and control the surface roughness of the electrode, it is difficult to install sensor equipment for measuring the main contact branch-related characteristics on the actual machine, and it is also difficult to adjust the speed, pressure and other parameters of the contact closure during operation.

[0028] Specifically, Figure 1 Schematic diagram of a block diagram of a converter transformer main contact electrode material performance test device according to an embodiment of the present application.

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

[0030] Therein, a plurality of contact electrodes 100 are constructed of different materials, sizes and surface roughnesses.

[0031] It should be noted that the contacts in the embodiment of the present application include a stationary contact 1 and a moving contact 2, wherein the stationary contact 1 is composed of a stationary contact electrode 101, a stationary contact electrode terminal 102 and a stationary contact electrode bearing 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 bearing component 106.

[0032] In the embodiment of the present application, a plurality of contact electrodes (including a stationary contact electrode 101 and a moving contact electrode 104) may be constructed based on different materials, sizes and surface roughnesses, such as Figure 2 As shown, the contact electrode can be fixed on an electrode carrying component, and the electrode carrying component provides a stable mechanical connection and electrical insulation between the contact electrode and a subsequent motion mechanism, etc.

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

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

[0035] Among them, the base 4.

[0036] The sliding module 3 composed of the slide rail 33 and the slider is used to fix the static contact 1 and the moving contact 2 through the slider, and carry the static contact 1 and the moving contact 2 to perform linear motion in the slide rail 33 to open or close the static contact 1 and the moving contact 2.

[0037] In the embodiment of the present 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 may 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, wherein 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 be opened and closed; the slide rail 33 is fixed on the base to keep it reliably still.

[0040] In actual implementation, the embodiment of the present application should keep the friction between the slide rail 33 and the slider low, 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 group of contacts when the moving contact 2 and the stationary contact 1 in at least one group of contacts preset in the test device 10 are in contact and pressed.

[0042] In addition, the embodiment of the present application further includes a mechanical sensor mechanism 200 (ie, a mechanical 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 are in contact and pressed.

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

[0044] 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 fixing bracket 202 is used to fix the positive pressure sensor 201 .

[0046] Specifically, the mechanical sensor module 200 in the embodiment of the present application mainly includes a positive pressure sensor 201 and a fixing bracket 202 .

[0047] Among them, the fixing bracket 202 can be used to fix the positive pressure sensor 201, and after the positive pressure sensor 201 is fixed to the static contact 1, when the moving contact 2 contacts and presses the static 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 electrical parameters between the stationary contact 1 and the moving contact 2 .

[0049] Furthermore, the embodiment of the present application may also construct an electrical sensor mechanism 300 (ie, an electrical sensor module) and connect it to the contact terminal 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 the present 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, the four-electrode low resistance tester.

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

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

[0054] It should be noted that in the embodiment of the present application, the electrical sensor mechanism 300 can be composed of a four-electrode low resistance tester, an AC high current generator or a voltage sensor, so as to simulate and measure electrical stresses such as current and voltage on the contacts when the tap changer is actually running.

[0055] The mechanical motion control module 400 is used to obtain multiple positive pressure values ​​that meet the preset test requirements in the mechanical sensor module 200, and control the moving contact 2 and the static contact 1 in at least one group of contacts to perform multiple open and close state switching operations, and by reading 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 of each material, size and surface roughness during multiple open and close state switching operations under each positive pressure value.

[0056] Afterwards, the embodiment of the present application also needs to construct a mechanical motion control mechanism 400 (i.e., a mechanical motion control module), and by adjusting the spring compression block 403, obtain multiple positive pressure values ​​that meet the preset test requirements in the mechanical sensor module 200, and control the moving contact 2 and the static contact 1 in the contact through the electromagnet 405 to perform multiple open and close state switching operations, and at the same time read the mechanical sensor module 200 and the electrical sensor module 300 to obtain the electrical parameters and mechanical sensing data of multiple open and close state switching operations under each positive pressure value corresponding to the contact electrode constructed of each material, size and surface roughness.

[0057] Optionally, in one embodiment of the present 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 through the electromagnet 405 in the mechanical motion control module 400.

[0060] The electromagnet 405 is used to pull the screw 402 so as to open or close the moving contact 2 and the stationary contact 1 in each contact group.

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

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

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

[0064] In the embodiment of the present application, the electromagnet 405 can be controlled by a computer and can cooperate with the mechanical sensor mechanism 200 and the electrical sensor mechanism 300 to automatically perform tests.

[0065] It should be noted that the spring compression block 403 is inserted into the screw rod 402 in the form of an internal thread, which not only ensures that the spring compression block 403 can move forward and backward, but also ensures that the spring compression block 403 does not slide away when subjected to axial positive pressure, so that the pressure borne by the contact is stable and adjustable; in addition, there is a linear bearing between the spring bracket 404 and the screw rod 402, which not only ensures that the spring bracket 404 and the screw rod 402 can perform stable axial movement, but also reduces radial displacement and axial friction.

[0066] In actual implementation, the embodiment of the present application can adjust the distance between the spring compression block 403 and the spring bracket 404 to adjust the compression amount of the spring 401, thereby adjusting the positive pressure between the static contact 1 and the moving contact 2.

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

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

[0069] The speed sensor is used to detect the speed change information of the moving contact 2 and the stationary contact 1 during the switching process of the opening and closing states of the moving contact 2 and the stationary contact 1.

[0070] The temperature sensor is used to detect the temperature rise information of the preset contact resistance during the switching process of the moving contact 2 and the stationary contact 1 between the open and closed states.

[0071] As a feasible method, the converter transformer main contact electrode material performance test device 10 of the embodiment of the present application may also include a displacement sensor, a speed sensor and a temperature sensor to measure the displacement and speed changes of the moving contact 2 and the static contact 1 during the switching process, and measure the temperature rise information caused by the Joule heat generated in the contact resistance and other parts.

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

[0073] A converter transformer main contact electrode material performance test device proposed in an embodiment of the present application includes a plurality of contact electrodes 100 constructed of 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 static contact 1 in at least one group of contacts preset in the test device 10 are in contact and pressed; an electrical sensor module 300, used to measure the electrical parameters between the static contact 1 and the moving contact 2; a mechanical motion control module 400, used to obtain a plurality of positive pressure values ​​that meet the preset test requirements in the mechanical sensor module, and control the moving contact 2 and the static contact 1 in at least one group of contacts to perform multiple open and close state switching operations, and by reading the mechanical sensor module and the electrical sensor module, the electrical parameters and mechanical sensing data of the multiple open and close state switching operations under each positive pressure value corresponding to the contact electrode constructed of each material, size and surface roughness are obtained. This application can not only measure the static contact resistance of the tap switch main contact electrode and the electrical stress during dynamic switching, but also measure the pressure, displacement, speed and temperature of the tap switch main contact. At the same time, it can also control mechanical parameters such as the speed and pressure of contact closing, thereby providing experimental data support for the study of the ablation aging characteristics of the main contact.

[0074] Next, a converter transformer main contact electrode material performance test method proposed in an embodiment of the present application is described with reference to the accompanying drawings.

[0075] Figure 4 A flow chart of a method for testing the performance of main contact electrode materials of a converter transformer provided in an embodiment of the present application.

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

[0077] In step S401, a plurality of contact electrodes with different materials, sizes and surface roughness are constructed, and at least one corresponding group of contacts is constructed by using the plurality of contact electrodes with different materials, sizes and surface roughness.

[0078] In step S402, when the moving contact and the stationary contact in at least one group of contacts are in contact and pressed together, the positive pressure borne by each group 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 contacts and the static contacts in at least one group of contacts are controlled to perform multiple open and close state switching operations to obtain the electrical parameters and mechanical sensing data of the multiple open and close state switching operations under each positive pressure value corresponding to the contact electrodes constructed of each material, size and surface roughness.

[0080] The following describes the execution logic of the converter transformer main contact electrode material performance test method of the present application through an embodiment.

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

[0082] S1: manufacturing contact electrodes, controlling the material, size and surface roughness of the contact electrodes, or using the contact electrodes of the actual tap changer as the contact electrodes; drilling and tapping the contact electrodes to facilitate the connection between the contacts and the mechanical motion control mechanism and the contact electrode terminals;

[0083] S2: Fixed contact electrode and contact electrode bearing component, forming a complete contact 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: Start the electromagnet in the mechanical motion control mechanism, so that the electromagnet pulls the screw, drives the moving contact in the contact and the static contact in the contact to open and close, and records and collects electrical and mechanical sensor data through the electrical sensor mechanism and the mechanical sensor mechanism;

[0086] S5: repeat S4 to obtain the accumulated electrical and mechanical sensing data under different closing times;

[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 the specific implementation process, the embodiment of the present application can construct an electrical sensing mechanism through an AC high current generator and a voltage sensor to adjust the current of the high current generator in the above S3, so as to obtain electrical and mechanical sensing data under different currents.

[0090] It can be understood that the embodiments of the present application are capable of well measuring the static contact resistance of the contact, the transient electrical stress of the contact during dynamic switching, and the static pressure of the contact and the pressure changes during switching; in addition, the embodiments of the present application can also conveniently adjust the positive pressure of the control contact during measurement, thereby simulating the measurement of the electrical characteristics of the contact electrode under different pressures.

[0091] It should be noted that the above explanation of the embodiment of the converter transformer main contact electrode material performance test device is also applicable to the converter transformer main contact electrode material performance test method of this embodiment, which will not be repeated here.

[0092] According to the material performance test method of the main contact electrode of the converter transformer proposed in the embodiment of the present application, by constructing a plurality of contact electrodes of different materials, sizes and surface roughness, and constructing at least one corresponding group of contacts by using a plurality of contact electrodes of different materials, sizes and surface roughness; when the moving contact and the static contact in at least one group of contacts are in contact and pressed, the positive pressure borne by each group of contacts is detected, and the electrical parameters between the static contact and the moving contact are measured; the preset spring compression block is adjusted to obtain a plurality of positive pressure values ​​that meet the preset test requirements, and the moving contact and the static contact in at least one group of contacts are controlled to perform multiple opening and closing state switching operations, so as to obtain the electrical parameters and mechanical sensing data of multiple opening and closing state switching operations under each positive pressure value corresponding to the contact electrode constructed by each material, size and surface roughness. The present application can not only measure the static contact resistance of the main contact electrode of the tap switch and the electrical stress during dynamic switching, but also measure the pressure, displacement, speed and temperature of the main contact of the tap switch, and at the same time, it can also control the mechanical parameters such as the speed and pressure of the contact closure, thereby providing experimental data support for the study of the ablation aging characteristics of the main contact.

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

[0094] A memory 501 , a processor 502 , and a computer program stored in the memory 501 and executable on the processor 502 .

[0095] When the processor 502 executes the program, the converter transformer main contact electrode material performance test method provided in the above embodiment is implemented.

[0096] Furthermore, the electronic device further comprises:

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

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

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

[0100] If the memory 501, the processor 502 and the communication interface 503 are implemented independently, the communication interface 503, the memory 501 and the processor 502 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

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

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

[0103] The embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the above-mentioned converter transformer main contact electrode material performance test method is implemented.

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

[0105] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0106] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0107] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0108] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways as necessary and then storing it in a computer memory.

[0109] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0110] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0111] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0112] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A converter transformer main contact electrode material performance test device, characterized in that: include: Multiple contact electrodes constructed of different materials, sizes, and surface roughness; A mechanical sensor module, used for detecting the positive pressure borne by each group of contacts when the moving contacts and the stationary contacts in at least one group of contacts preset in the test device are in contact and pressed together; An electrical sensor module, used for measuring electrical parameters between the stationary contact and the moving contact; The mechanical motion control module is used to obtain multiple positive pressure values ​​that meet preset test requirements in the mechanical sensor module, and control the moving contacts and the static contacts in the at least one group of contacts to perform multiple open and close state switching operations, and to obtain the electrical parameters and mechanical sensing data of multiple open and close state switching operations under each positive pressure value corresponding to the contact electrodes constructed of each material, size and surface roughness by reading the mechanical sensor module and the electrical sensor module.

2. The device according to claim 1, characterized in that Also includes: Base; The sliding module composed of a slide rail and a slider is used to fix the static contact and the moving contact through the slider, and carry the static contact and the moving contact to perform linear motion in the slide rail to open or close the static contact and the moving contact.

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

4. The device according to claim 1, characterized in that The mechanical sensor module comprises: The positive pressure sensor is used to detect the positive pressure on each group of contacts when the moving contact contacts and the static contact are pressed together; A fixing bracket is used to fix the positive pressure sensor.

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

6. The device according to claim 1, characterized in that The mechanical motion control module comprises: Springs and spring supports; A screw rod, used for pulling the moving contact to perform linear motion through the 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 and the static contact can be opened or closed; The spring compression block is used to adjust the distance between the spring support and the spring support to adjust the positive pressure between the static contact and the moving contact.

7. A method for testing the performance of main contact electrode materials of a converter transformer, characterized in that: The following steps are involved: Constructing a plurality of contact electrodes of different materials, sizes and surface roughnesses, and constructing at least one corresponding group of contacts by using the plurality of contact electrodes of different materials, sizes and surface roughnesses; When the moving contact and the stationary contact in the at least one group of contacts are in contact and pressed, the positive pressure borne by each group of contacts is detected, and the electrical parameters between the stationary contact and the moving contact are measured; The preset spring compression block is adjusted to obtain multiple positive pressure values ​​that meet the preset test requirements, and the moving contact and the static contact in the at least one group of contacts are controlled to perform multiple open and close state switching operations to obtain the electrical parameters and mechanical sensing data of the multiple open and close state switching operations under each positive pressure value corresponding to the contact electrode constructed of each material, size and surface roughness.

8. An electronic device, characterized in that: include: 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 method for testing the performance of the main contact electrode material of the converter transformer as claimed in claim 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the converter transformer main contact electrode material performance testing method as claimed in claim 7.

10. A computer program product, comprising a computer program, characterized in that The computer program is executed to implement the converter transformer main contact electrode material performance testing method as claimed in claim 7.

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