Spring operating mechanism circuit breaker tool test system based on phase selection closing
The spring-operated mechanism circuit breaker fixture test system with phase-selective closing solves the problems of closing time accuracy and load current adjustment in traditional test platforms, realizes high-precision closing control and dynamic working condition simulation, and improves test efficiency and flexibility.
Patent Information
- Application Number
- CN202511005940.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-22
- Publication Date
- 2025-10-17
AI Technical Summary
The traditional spring-operated mechanism circuit breaker test platform has the problem that the starting rotation moment of the angle detection sensor is not synchronized with the starting rotation moment of the closing half-shaft, the closing time accuracy is insufficient, and the test system cannot dynamically adjust the load current and simulate short-circuit current impact, resulting in low test flexibility and efficiency.
The fixture test system for circuit breaker with spring-operated mechanism for phase-selective closing includes a phase-selection control module, a fixture test module, and a data coordination module. It is fixedly connected to the closing half-shaft through an angle detection sensor. Combined with a microprocessor unit and servo motor drive, it dynamically adjusts the load current and closing speed to achieve precise closing control.
The closing phase accuracy is improved, and simulation tests can be performed under different working conditions, which improves test efficiency and accuracy. The closing error is less than 1ms, and the load current is dynamically adjusted to simulate short-circuit current impact.
Smart Images
Figure CN120802010A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of high-voltage circuit breaker intelligent control and testing, and particularly relates to a spring operating mechanism circuit breaker tool testing system based on phase selection closing. BACKGROUND
[0002] The high-voltage circuit breaker is a kind of important protection and control equipment in the power system, which can safely and reliably turn on, carry and break the current under normal and abnormal circuit conditions. When necessary (such as maintenance, scheduling), the load current in the circuit is turned on or off. When a serious fault such as short circuit occurs in the system, the huge fault current is automatically disconnected extremely quickly, cutting off the fault part, protecting other intact devices (such as generators, transformers, transmission lines, and electrical equipment) in the power system from damage and preventing the accident from expanding.
[0003] The normal opening and closing functions of the high-voltage circuit breaker are related to the safety of other devices in the system, so it is particularly important to test the opening and closing under different working conditions. At present, during the testing process using the traditional spring operating mechanism circuit breaker testing platform, the following problems are found: (1) The general circuit breaker is used as the testing platform, and no related sensors are integrated, so external sensors are needed for testing, and there will be a gap during installation, which causes the rotation starting time of the angle detection sensor to be out of synchronization with the rotation starting time of the closing half shaft, affecting the accuracy of the closing time; (2) The testing tool testing system mostly adopts a fixed driving mode, which cannot adjust the closing speed; it also cannot dynamically adjust the load current, so it cannot simulate dynamic working conditions such as short-circuit current impact; the testing flexibility is insufficient and the efficiency is low. SUMMARY
[0004] The purpose of the present application is to provide a spring operating mechanism circuit breaker tool testing system based on phase selection closing, which can test using the testing system, has high closing phase accuracy, and can realize simulation testing under different working conditions, improving the testing efficiency.
[0005] In order to achieve the above object, the utility model adopts the technical scheme: a spring operating mechanism circuit breaker tool testing system based on phase selection closing, characterized by: including phase selection control module, tool testing module and data cooperation module, the phase selection control module includes microprocessor unit, tool bus voltage detection sensor installed on the circuit breaker load side and angle detection sensor fixedly installed on the closing half shaft, the tool testing module includes adjustable AC load, monitoring unit and operating mechanism driven by servo motor, the adjustable AC load is used for adjusting load current, the monitoring unit is used for monitoring load current and the rotating speed of servo motor in real time, and monitoring data is transmitted to the data cooperation module, the data cooperation module issues preset load current to the phase selection control module and the tool testing module, the tool testing module feeds back measured load current to the data cooperation module, when there is difference between preset load current and measured load current, dynamic adjustment is carried out, the phase selection control module calculates the compensation time required for closing corresponding load current, and the PWM waveform output according to the compensation time is used for controlling servo motor rotation to carry out closing operation, and simultaneously, the phase selection control module judges the deviation of closing position and voltage zero point according to the data of angle detection sensor and tool bus voltage detection sensor, and if there is deviation, the compensation time is adjusted.
[0006] Further, the angle detection sensor and the closing half shaft are fixed together through a shaft coupling.
[0007] Further, the rotating speed range of the servo motor is 0-3000r / min and is adjustable.
[0008] Further, the data cooperation module carries out data interaction with the tool testing module through an OPC protocol, and transmits preset parameters to the tool testing module.
[0009] Further, the data cooperation module presets different time compensation values according to different load currents, and forms a compensation time table.
[0010] Further, in the testing process, a plurality of preset conditions support one-key switching.
[0011] Further, the angle detection sensor and the tool bus voltage detection sensor of the phase selection control module detect the deviation of opening and closing position and voltage zero point, record the deviation value, and simultaneously, the compensation time table is optimized and updated according to the deviation value.
[0012] Further, the servo motor rotor is integrated with an optical encoder, and the monitoring unit monitors the rotating speed of the servo motor by collecting the signal of the optical encoder.
[0013] Further, the operating mechanism comprises a driving wheel, a lead screw, a first sliding block, a first guide rail, a crank, a second sliding block, a second guide rail, a disconnecting spring and a closing spring; a driving wheel is mounted on the output shaft of the servo motor, the driving wheel is mounted on the end of the lead screw and engages with the driving wheel, the first sliding block is mounted on the lead screw and can slide on the first guide rail, the upper part of the crank is connected with the first sliding block through a push rod, the second sliding block is mounted on the lower cross bar of the crank and can slide on the second guide rail, one end of the disconnecting spring and the closing spring respectively contacts with the two ends of the lower cross bar of the crank through the first connecting frame, the other end of the disconnecting spring and the other end of the closing spring are connected with the disconnecting half shaft and the closing half shaft through the second connecting frame; after the tool test module receives the closing command of the phase selection control module, the servo motor drives the lead screw to rotate in the forward direction according to the control signal output by the phase selection control module, so that the first sliding block moves, and then the crank drives the closing spring to drive the closing half shaft to act; after the tool test module receives the disconnecting command of the phase selection control module, the servo motor drives the lead screw to rotate in the reverse direction according to the control signal output by the phase selection control module, so that the first sliding block moves, and then the crank drives the disconnecting spring to drive the disconnecting half shaft to act.
[0014] Further, the adjustable alternating current load communicates with the data cooperation module through the self-provided RS232 serial port, receives the control command from the data cooperation module, and dynamically adjusts the load current.
[0015] The beneficial effects of the present application are: 1. The angle detection sensor is fixedly installed on the closing half shaft, and the closing half shaft and the angle detection sensor are stably connected to form a whole, so that the closing position signal is directly obtained through the mechanical linkage of the closing half shaft, the signal delay caused by mechanical problems is eliminated, and the closing precision is improved; the phase control error is less than or equal to 1 ms.
[0016] 2. The microprocessor unit of the phase selection control module combines the bus voltage detection sensor data and the angle detection sensor data to detect the closing precision, dynamically adjusts the operating mechanism, and accurately controls the closing time at the voltage zero-crossing point.
[0017] 3. By setting the adjustable alternating current load, the control command from the data cooperation module is received, the load current is dynamically adjusted, different working conditions can be simulated, and the test time is shortened. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a system architecture diagram of the present application.
[0019] Figure 2 It is a schematic view of the integrated connection of the closing half shaft and the angle detection sensor in the present application.
[0020] Figure 3 It is a work flow chart of the phase selection control module in the present application.
[0021] Figure 4 This is a schematic diagram of the moment when the rotation angle of the closing half-axis reaches N and the voltage zero-crossing point coincides with each other in the present invention.
[0022] Figure 5 It is a structural block diagram of the tooling test module in the present invention.
[0023] Figure 6 It is a structural schematic diagram of the operating mechanism of the tooling test module in the present invention.
[0024] Figure 7 This is a system principle diagram of the present invention.
[0025] In the figure, 11 is the closing half shaft; 12 is the angle detection sensor; and connection part 13.
[0026] 20. Servo motor; 21. Drive wheel; 22. Lead screw; 23. First slider; 24. Push rod; 25. Crank arm; 26. Opening spring; 27. Closing spring; 28. First guide rail; 29. Second guide rail; 30. Support; 31. First connecting frame; 32. Second connecting frame. DETAILED DESCRIPTION
[0027] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the appended drawings of the embodiments of the present invention. Figures 1-7 , clearly and completely describing the technical solutions of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments derived by ordinary technicians in this field fall within the scope of protection of the present invention.
[0028] like Figure 1 As shown in the figure, the fixture test system for a spring-operated circuit breaker with phase-selective closing consists of three core modules: the phase-selection control module, the fixture test module, and the data coordination module. Data exchange between the different modules can be performed via serial and / or network ports, supporting closed-loop verification of virtual software and physical fixtures. The closing command from the phase-selection module triggers the load simulation module's operating condition switching, achieving precise synchronization between the action and the load. The data coordination module uses virtual software to set and send a preset load current to the phase-selection control module and the fixture test module. The fixture test module feeds back the measured load current to the data coordination module, dynamically adjusting any discrepancies. The phase-selection control module calculates the compensation time required for the corresponding load current and controls the servo motor's rotation based on the PWM waveform output by the compensation time to perform the closing operation. Simultaneously, the phase-selection control module detects the closing accuracy and deviation from the voltage zero crossing point using the angle detection sensor and the fixture bus voltage detection sensor. If any deviation exists, the compensation time corresponding to the load current is adjusted.
[0029] Specifically, the phase selection control module comprises a microprocessor unit, a tool bus voltage detection sensor and an angle detection sensor installed on the closing half shaft. The tool bus voltage detection sensor is installed on the load side (outlet side) of the circuit breaker. When the circuit breaker is in the open state, the load side has no voltage, and when the circuit breaker is in the closed state, the load side has voltage. The time point when the voltage appears is the closing time point.
[0030] As shown in Figure 2 The application integrates the closing half shaft 11 and the angle detection sensor 12, and the closing half shaft 11 and the angle detection sensor 12 are connected through the connecting part 13. Specifically, the connecting part 13 is a fixed coupling, which can connect the closing half shaft 11 and the angle detection sensor 12 together, and after connection, the two do not have relative displacement. In this way, the closing position signal is directly obtained through the mechanical linkage of the closing half shaft, and the signal delay caused by mechanical problems is eliminated. The closing half shaft is a mechanical rotating shaft for driving the circuit breaker contact to separate, and the end thereof is connected to the rotating shaft of the sector plate through a plane-arc surface cooperation to realize interlocking.
[0031] The microprocessor unit has the following functions: obtaining the bus voltage zero-crossing point according to the voltage detection sensor data; obtaining the rotating angle of the closing half shaft according to the angle detection sensor data, and then obtaining the closing position, and for the same circuit breaker test platform, the rotating angle is fixed as N; issuing a closing instruction to dynamically adjust the operating mechanism through the output PWM waveform. As shown in Figure 3 The microprocessor unit combines the bus voltage detection sensor data and the angle detection sensor data to accurately control the closing time at the voltage zero-crossing point through dynamic adjustment of the operating mechanism. As shown in Figure 4 The time point when the rotating angle reaches N coincides with the voltage zero-crossing point.
[0032] As shown in Figure 5 The tool test module mainly comprises an adjustable AC load, a monitoring unit and an operating mechanism driven by a servo motor. The servo motor receives the PWM signal output by the phase selection module to adjust the closing speed, and the rotating speed range is adjustable from 0 to 3000 r / min. The resistance-inductance composite circuit of the adjustable AC load is used to adjust the load current. The monitoring unit is used to monitor the rotating speed of the servo motor and the load current in real time, and the monitoring data is transmitted to the data collaboration module.
[0033] The application drives the driving wheel through the servo motor, and the rotating speed of the servo motor is provided by the PWM signal of the phase selection control module. The higher the frequency of the PWM signal, the faster the rotating speed of the servo motor, and the faster the rotating speed of the driving wheel. At the same time, an optical encoder is integrated on the rotor of the servo motor, and the output signal of the encoder is provided to the monitoring unit to monitor the rotating speed of the servo motor. That is, the closing speed can be dynamically adjusted.
[0034] The application can effectively improve the test efficiency by receiving the control command from the data cooperation module through the RS232 serial port of the adjustable AC load integrated in the tool test module, and dynamically adjusting the load current. The monitoring unit monitors the actual load current through the current sensor installed at the output end of the adjustable AC load. That is, the adjustable AC load realizes full-scene coverage test from no-load to short-circuit current impact.
[0035] As shown in Figure 6 The operating mechanism driven by the servo motor 20 includes a driving wheel 21, a lead screw 22, a first sliding block 23, a push rod 24, a crank arm 25, a split spring 26, a closing spring 27, a first guide rail 28, a second guide rail 29, and a second sliding block. The servo motor 20, the first guide rail 28, and the second guide rail 29 are respectively installed on the workbench. The output shaft of the servo motor 20 is connected with a driving wheel, the lead screw 22 is installed on the workbench through a support 30, the driving wheel 21 is installed at the end of the lead screw 22 and is engaged with the driving wheel, and the first sliding block 23 is installed on the lead screw 22 and can slide on the first guide rail 28. The crank arm 25 is in the shape of an inverted “T”, the vertical rod of the crank arm 25 is connected with the first sliding block 23 through the push rod 24, and the second sliding block is installed on the lower horizontal rod of the crank arm and can slide on the second guide rail. One end of the split spring 26 and one end of the closing spring 27 are respectively in contact with the two ends of the horizontal rod of the crank arm 25 through a first connecting frame 31, and the other end of the split spring 26 and the other end of the closing spring 27 are respectively connected with the split shaft and the closing shaft through a second connecting frame 32.
[0036] In the initial state, the crank arm 25 is in the default position. After the tool test module receives the closing command of the phase selection control module, the servo motor 20 rotates in the positive direction according to the PWM rotating speed control signal and the direction control signal output by the phase selection control module, drives the lead screw to rotate, moves the first sliding block, and then drives the closing spring 27 to drive the closing shaft to operate. After the tool test module receives the split command of the phase selection control module, the servo motor rotates in the reverse direction according to the control signal output by the phase selection control module, drives the lead screw to rotate, moves the first sliding block, and then drives the split spring 26 to drive the split shaft to operate, and performs the split operation.
[0037] After the tool test module receives the closing command of the phase selection module, the servo motor 20 rotates in the positive direction according to the PWM rotating speed control signal and the direction control signal output by the phase selection module, the driving wheel 21 rotates in the positive direction, the lead screw rotates in the positive direction and pushes the sliding block and the push rod to move forward, and then the closing spring stores energy and performs the closing operation. After the tool test module receives the split command of the phase selection module, the servo motor rotates in the reverse direction according to the PWM rotating speed control signal and the direction control signal output by the phase selection module, the driving wheel rotates in the reverse direction, the lead screw rotates in the reverse direction and pushes the sliding block and the push rod to move backward, and then the split spring stores energy and performs the split operation.
[0038] The data coordination module is mainly composed of an industrial computer and virtual software. The data coordination module presets different time compensation values according to different load currents. The data coordination module transmits the preset parameters to the tool test module through the OPC protocol for data interaction. At the same time, the data coordination module collects the servo motor speed and load current through the monitoring unit of the tool test module, compares the collected measured values with the preset values, and iterates the compensation time of different load currents combined with the measured data. As shown in FIG. 2, in the working process, the data coordination module. Figure 7
[0039] (1) The data coordination module simulates different working conditions by presetting the values of different load currents, and transmits these values to the adjustable AC load of the tool test module. The monitoring unit of the tool test module feeds back the actual load current monitored to the data coordination module, and the data coordination module resets if there is a deviation.
[0040] (2) The data coordination module simulates different working conditions by presetting the values of different load currents, and transmits these values to the phase selection control module. The phase selection control module calculates the compensation time by substituting these values into the phase selection algorithm, and finally outputs different PWM waveforms to control the rotation of the servo motor of the tool test module according to different compensation times.
[0041] (3) The phase selection control module first presets a compensation time table for different load currents according to empirical values. The empirical values refer to the compensation time values corresponding to different load currents according to historical experience data.
[0042] (4) The angle detection sensor and the tool bus voltage detection sensor of the phase selection control module detect the deviation of the opening and closing position and the voltage zero point, record the deviation value, and modify and optimize the compensation time corresponding to different load currents in (3).
[0043] (5) After repeating the above test steps, the granularity of the load current can be subdivided, and the accuracy of the compensation time required for each load current can also be improved.
[0044] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details and do not limit the application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the specification. The embodiments are selected and described in detail in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited by the claims and their entire scope and equivalents.
Claims
1. A tooling test system for a spring-operated circuit breaker with phase-selective closing, characterized by: Includes phase selection control module, tooling test module and data collaboration module; The phase selection control module includes a microprocessor unit, a tool bus voltage detection sensor installed on the load side of the circuit breaker, and an angle detection sensor fixedly installed on the closing half shaft; The tooling test module includes an adjustable AC load, a monitoring unit, and an operating mechanism driven by a servo motor; the adjustable AC load is used to adjust the load current; the monitoring unit is used to monitor the load current and the speed of the servo motor in real time and transmit the monitoring data to the data coordination module; The data coordination module sends the preset load current to the phase selection control module and the tooling test module, and the tooling test module feeds back the measured load current to the data coordination module. When there is a difference between the preset load current and the measured load current, dynamic adjustment is performed; the phase selection control module calculates the compensation time required for closing the corresponding load current, and controls the rotation of the servo motor to perform the closing operation according to the PWM waveform output according to the compensation time. At the same time, the phase selection control module determines the deviation between the closing position and the voltage zero point based on the data of the angle detection sensor and the tooling bus voltage detection sensor, and adjusts the compensation time if there is a deviation.
2. The spring-operated circuit breaker fixture test system based on phase-selective closing according to claim 1 is characterized in that: The angle detection sensor and the closing half shaft are fixed together through a coupling.
3. The tooling test system for a spring-operated circuit breaker with phase-selective closing according to claim 1 is characterized in that: The speed range of the servo motor is adjustable from 0 to 3000 r / min.
4. The tooling test system for a circuit breaker with a spring-operated mechanism based on phase-selective closing according to claim 1 is characterized in that: The data collaboration module exchanges data with the tooling test module through the OPC protocol and transmits preset parameters to the tooling test module.
5. The tooling test system for a circuit breaker with a spring-operated mechanism based on phase-selective closing according to claim 4 is characterized in that: The data coordination module presets different time compensation values according to different load currents and creates a compensation time table.
6. The tooling test system for a circuit breaker with a spring-operated mechanism based on phase-selective closing according to claim 5 is characterized in that: During the test, multiple preset working conditions can be switched with one click.
7. The tooling test system for a circuit breaker with a spring-operated mechanism based on phase-selective closing according to claim 5 is characterized in that: The angle detection sensor of the phase selection control module and the tooling bus voltage detection sensor detect the deviation between the opening and closing positions and the voltage zero crossing point, and record the deviation values, and optimize and update the compensation schedule based on these deviation values.
8. The tooling test system for a circuit breaker with a spring-operated mechanism based on phase-selective closing according to claim 1 is characterized in that: A photoelectric encoder is integrated on the rotor of the servo motor, and the monitoring unit monitors the rotational speed of the servo motor by collecting signals from the photoelectric encoder.
9. The tooling test system for a circuit breaker with a spring-operated mechanism based on phase-selective closing according to claim 1 is characterized in that: The operating mechanism includes a driving wheel, a lead screw, a first slider, a first guide rail, a crank arm, a second slider, a second guide rail, an opening spring, and a closing spring; a driving wheel is mounted on the output shaft of the servo motor, the driving wheel is mounted on the end of the lead screw and meshes with the driving wheel, the first slider is mounted on the lead screw and can slide on the first guide rail, the upper part of the crank arm is connected to the first slider via a push rod, the second slider is mounted on the lower cross bar of the crank arm and can slide on the second guide rail, one end of the opening spring and the closing spring are respectively in contact with the two ends of the lower cross bar of the crank arm via a first connecting frame, and the other end of the opening spring and the other end of the closing spring are respectively connected to the opening half-shaft and the closing half-shaft via a second connecting frame; When the tooling test module receives the closing command from the phase selection control module, the servo motor drives the lead screw to rotate in the forward direction according to the control signal output by the phase selection control module, so that the first slider moves, thereby prompting the crank arm to drive the closing spring to drive the closing half-axis to move; when the tooling test module receives the opening command from the phase selection control module, the servo motor drives the lead screw to rotate in the reverse direction according to the control signal output by the phase selection control module, so that the first slider moves, thereby prompting the crank arm to drive the opening spring to drive the opening half-axis to move.
10. The tooling test system for a circuit breaker with a spring-operated mechanism based on phase-selective closing according to claim 1, characterized in that: The adjustable AC load communicates with the data coordination module via its own RS232 serial port, receives control commands from the data coordination module, and dynamically adjusts the load current.