Pressing plate remote operation system and method based on servo motor and programmed control

Abstract

The invention discloses a pressing plate remote operation system and method based on a servo motor and programmed control. The system comprises a hard pressing plate module, a servo motor driving module, an auxiliary contact module, a software control module and a locking and alarming module. The method comprises the following steps: 1) self-checking a real-time state without alarm; 2) sending a remote instruction; 3) performing logic verification and locking; 4) servo motor driving; 5) state monitoring and feedback; and 6) performing exception handling and recovery. Compared with the prior art, the protection device has the advantages that on-off of a control loop is achieved, remote programmed operation instructions and logic verification functions of the software control module are matched, state monitoring of the contact module and safety guarantee of the locking and alarm module are assisted, remote control and programmed operation of functions of the protection device are achieved, the operation efficiency is improved, and the protection device is safe and reliable. The system reduces the risk of human errors, guarantees the safe and stable operation of a power system, has the flexibility of switching between a manual operation mode and an automatic operation mode, and meets different operation requirements.

Description

Technical Field

[0001] The present invention relates to the field of power system protection device control, and in particular to an intelligent pressure plate remote operation system and method based on a servo motor and programmed control. Background Art

[0002] In power systems, the tripping and closing output function of protective devices is usually enabled or disabled by manually plugging and unplugging hard pressure plates.

[0003] This traditional method has numerous drawbacks: First, operational efficiency is low, requiring manual on-site plugging and unplugging for each operation, which is time-consuming and labor-intensive. Second, it is prone to human error, such as the misplacement or omission of a pressure plate, which can cause the protective device to malfunction or fail to operate, posing a serious threat to the safe operation of the power system. Third, it cannot adapt to the development needs of intelligent substations, and cannot achieve remote monitoring and automated operation, which is not conducive to the intelligent operation, maintenance, and management of the power system. Although some improved pressure plate operation methods have emerged in the existing technology, most of them are only local optimizations and fail to fundamentally solve the above problems. They still suffer from defects such as complex operation, insufficient reliability, and low intelligence.

[0004] Therefore, an intelligent platen remote operating system and method based on servo motor and programmed control is in urgent need of research. Summary of the Invention

[0005] The purpose of the present invention is to provide an intelligent pressing plate remote operation system and method based on servo motor and programmed control, so as to overcome the problems of low efficiency, easy error and insufficient intelligence of manual operation of pressing plate in the prior art.

[0006] In order to solve the above technical problems, the present invention provides a technical solution: a remote operating system for a pressure plate based on a servo motor and programmed control, comprising a hard pressure plate module, a servo motor drive module, a software control module, an auxiliary contact module, and a locking and alarm module;

[0007] The hard pressure plate module is used to realize the physical opening and closing of the circuit through mechanical rotation, and control the tripping and closing output function of the protection device;

[0008] The servo motor driving module is mechanically connected to the hard pressing plate module, and drives the servo motor to rotate by receiving a control signal, thereby adjusting the rotation angle of the hard pressing plate to complete the on-off operation;

[0009] The software control module is in communication with the servo motor drive module, and is used to send remote operation instructions to the servo motor drive module and verify the correctness of the operation logic based on a preset program;

[0010] The auxiliary contact module is electrically connected to the hard pressing plate module, collects the opening and closing state signals of the hard pressing plate in real time, and transmits the state signals to the background system;

[0011] The locking and alarm module is connected to the auxiliary contact module and the software control module. When the status of the hard pressure plate is detected to be inconsistent with the preset logic, the locking mechanism is triggered to cut off the access to the relevant equipment and an alarm signal is generated and sent to the background system.

[0012] The servo motor drive module supports switching between manual operation mode and remote control mode, and the software control module includes a programmed operation logic library, which can automatically generate a pressure plate insertion and retraction sequence according to preset conditions.

[0013] As a preferred solution, the auxiliary contact module realizes status signal acquisition through photoelectric sensors or mechanical limit switches, and the signal transmission adopts the anti-interference redundant dual-channel RS485 communication protocol, and triggers automatic switching to the backup channel when the signal is lost.

[0014] As a preferred solution, the locking and alarm module integrates an audible and visual alarm device, and prohibits the execution of all remote operation instructions in the locked state.

[0015] As a preferred solution, the servo motor drive module adopts a PID control algorithm to adjust the rotation angle of the servo motor and is equipped with an overload protection circuit to automatically cut off the power supply when it detects that the motor torque exceeds the limit.

[0016] As a preferred solution, the software control module integrates a visual human-machine interface, supports real-time status display, operation history query and remote operation authority hierarchical management functions.

[0017] The remote operation method of the pressing plate based on the servo motor and programmed control includes the following steps:

[0018] 1) Remote command transmission: The software control module sends an operation instruction to the servo motor drive module, and the instruction includes the type of the pressure plate and the target state;

[0019] 2) Servo motor drive: After the servo motor drive module parses the instruction, it drives the servo motor to rotate to the specified angle, driving the hard pressure module to complete the physical on-off action;

[0020] 3) Status monitoring and feedback: The auxiliary contact module detects the opening and closing status of the hard pressure plate in real time and feeds back the status signal to the software control module and the locking and alarm module;

[0021] 4) Logic verification and interlocking: The software control module compares the current state with the preset logic. If the state does not match, the interlocking and alarm module is triggered to cut off the access to the relevant equipment and generate an alarm signal;

[0022] 5) Abnormal handling and recovery: The operator checks the cause of the abnormality according to the alarm signal, and after correction, releases the lock through the software control module. The system re-executes the calibration and resumes normal operation.

[0023] As a preferred solution, the method supports programmed batch operations and can automatically execute multiple groups of pressure plate insertion and retraction tasks according to preset logic.

[0024] As a preferred solution, the operation instructions in step 1) include manual single-step operation instructions and programmed batch operation instructions, and the programmed operation must be executed after passing double password verification.

[0025] As a preferred solution, before the operation instruction in step 1) is sent, the operator's identity must be verified through face recognition or dynamic token, and an operation audit log must be generated in the background;

[0026] The status monitoring and feedback in step 3) includes a CRC check on the integrity of the signal transmission. If the check fails, the status signal is automatically retransmitted at least three times.

[0027] The advantages of the present invention compared with the existing technology are: the circuit is connected and disconnected by driving the hard pressure plate module through a servo motor, and the remote operation instructions and logic verification functions of the software control module, as well as the status monitoring of the auxiliary contact module and the safety protection of the locking and alarm module, realize remote control and programmed operation of the protection device function, improve operational efficiency, reduce the risk of human error, ensure the safe and stable operation of the power system, and at the same time have the flexibility of switching between manual and automatic operation modes to meet the operational requirements in different scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a block diagram of the present invention.

[0029] Figure 2 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is not limited to the specific implementation methods listed below, but also includes any reasonable combination of the specific implementation methods.

[0031] The remote operating system and method of the pressure plate based on servo motor and programmed control consists of the following core modules:

[0032] 1. Hard Pressure Plate Module: The core component is the hard pressure plate, which physically connects and disconnects the circuit through mechanical rotation, thereby controlling the tripping and closing output functions of the protective device. The structural design of the hard pressure plate must meet mechanical strength and electrical performance requirements to ensure reliable circuit connection and disconnection under long-term operation and frequent operation.

[0033] 2. Servo Motor Driver Module: This module is mechanically connected to the hard platen module and receives control signals to drive the servo motor. The servo motor's rotation angle is precisely controlled, driving the hard platen to achieve precise rotation angle adjustment, completing the circuit's on-off operation. The servo motor driver module uses a PID control algorithm to adjust the servo motor's rotation angle and is equipped with an overload protection circuit that automatically cuts off power when it detects excessive motor torque, preventing motor damage and improving system reliability and safety. The module also supports switching between manual and remote control modes to meet operational requirements in different situations.

[0034] 3. Software control module: It communicates with the servo motor drive module and is the core control unit of the entire system. It sends remote operation instructions to the servo motor drive module. These instructions contain information such as the type of pressure plate insertion and retraction and the target status. Before sending the instructions, the software control module will verify the operator's identity through facial recognition or dynamic tokens, and generate an operation audit log in the background to ensure the safety and traceability of the operation. The module also contains a programmed operation logic library that can automatically generate the pressure plate insertion and retraction sequence according to preset conditions, realize programmed batch operation, and improve operational efficiency. In addition, the software control module integrates a visual human-machine interface, supports real-time status display, operation history query and remote operation authority hierarchical management functions, which makes it convenient for operators to intuitively understand the system operation status and perform operation management.

[0035] 4. Auxiliary Contact Module: Mechanically connected to the hard platen module, it operates on a separate electrical circuit and is used to collect real-time signals about the hard platen's open and closed status. It utilizes mechanical limit switches to collect these signals, ensuring accuracy and reliability. Signal transmission utilizes a redundant, interference-resistant dual-channel RS485 protocol, triggering automatic switching to a backup channel in the event of signal loss, ensuring stable and accurate transmission of status signals to the backend system.

[0036] 5. Lockout and Alarm Module: Connected to the auxiliary contact module and software control module, it plays a key role in ensuring safety. When the hard plate status signal collected by the auxiliary contact module does not match the preset logic of the software control module, the module immediately triggers the lockout mechanism, cutting off the access to the relevant equipment to prevent the abnormal state from further expanding and causing equipment damage or system failure. At the same time, the lockout and alarm module integrates an audible and visual alarm device, which generates an alarm signal and sends it to the backend system, reminding operators to deal with abnormal situations in a timely manner. In the locked state, the module also prohibits the execution of all remote operation commands, avoiding incorrect operations under abnormal conditions and further improving system safety.

[0037] Operation process and working principle

[0038] Remote command sending

[0039] On the human-machine interface of the software control module, the operator selects the type of pressure plate to be applied or released, and the target state, based on actual needs. For example, applying a tripping pressure plate for a protective device or removing a signal pressure plate from the system is necessary. Before sending the command, the system requires the operator to authenticate themselves. Using a two-person password confirmation system, only authenticated operators can execute the command, ensuring operational security and authority management. Once authenticated, the software control module generates the corresponding command, which contains detailed information about the pressure plate application and release, such as the pressure plate number and the target state (applied or withdrawn), and sends it to the servo motor drive module.

[0040] Servo motor drive and hard pressure plate action

[0041] Upon receiving the operational instructions from the software control module, the servo motor driver module immediately parses the instructions, extracting the requirements for the platen's engagement and retraction. Based on the parsed results, the servo motor is then driven to rotate at a predetermined angle and direction. During this rotation, the servo motor, through a mechanical transmission mechanism, drives the hard platen in the hard platen module to rotate accordingly, thereby physically switching the circuit on and off. For example, when the platen is engaged, the servo motor rotates the hard platen to the closed position, completing the circuit; when the platen is withdrawn, the servo motor rotates the hard platen to the open position, disconnecting the circuit.

[0042] Condition monitoring and feedback

[0043] The auxiliary contact module monitors the open / close status of the hard pressure plate in real time during its operation. Once the hard pressure plate completes its rotation, the auxiliary contact module immediately collects the current status signal and uses mechanical limit switches to detect the actual position of the hard pressure plate to determine whether it has accurately reached the target state (engaged or disengaged). The collected status signal is then transmitted to the software control module and the locking and alarm module via a redundant dual-channel RS485 communication protocol. If the signal on one channel is lost during signal transmission, the system automatically switches to the backup channel, ensuring timely and accurate feedback of the status signal to the relevant modules.

[0044] Logic check and lockout

[0045] The software control module continuously receives real-time feedback from the auxiliary contact module regarding the hard platen status, comparing it against the preset operating logic. If the current status matches the preset logic, the operation is successful, allowing the next step to proceed. The system continues normal operation, and the platen status display is updated on the human-machine interface to provide the operator with an intuitive understanding of the operation results. However, if the current status does not match the preset logic, such as if the platen fails to engage or disengage correctly, the software control module quickly sends a signal to the lockout and alarm module, triggering the lockout mechanism. Upon receiving the signal, the lockout and alarm module immediately cuts off access to the relevant equipment, preventing serious consequences such as misoperation or failure of protective devices due to abnormal platen status. Simultaneously, the lockout and alarm module activates the audible and visual alarm system, generating an alarm signal that is sent to the backend system, alerting the operator to promptly address the abnormal situation. In the locked state, the system prohibits the execution of all remote operation commands, preventing further misoperation during the abnormal state and ensuring safe and stable system operation.

[0046] Exception handling and recovery

[0047] After receiving the alarm signal, the operator will rush to the scene according to the alarm information and check the cause of the abnormality. Possible reasons include mechanical jamming of the hard pressure plate, failure of the servo motor, abnormal signal acquisition or transmission of the auxiliary contact module, etc. The operator will take corresponding measures according to the specific cause, such as maintenance of the hard pressure plate, repair of the servo motor, or inspection of the communication line of the auxiliary contact module. After the cause of the abnormality is eliminated, the operator will initiate an application to release the lock through the software control module. The software control module will once again conduct a comprehensive inspection and verification of the current system status. After confirming that the system has returned to normal, it will send a release instruction to the lock and alarm module. After receiving the instruction, the lock and alarm module will release the lock state and allow the execution of remote operation instructions. The system will re-execute the logic check to ensure that the state of the hard pressure plate is consistent with the preset logic, and then resume normal operation, continue to perform subsequent pressure plate insertion and retraction operations or maintain normal working status.

[0048] Programmatic batch operations

[0049] In actual applications, there may be situations where multiple groups of pressure plates need to be put in and out in batches, such as when performing equipment maintenance or adjusting the system operation mode. The software control module of the present invention contains a programmed operation logic library. The operator only needs to select the corresponding programmed operation scenario on the human-machine interface, and the system will automatically generate the put-in and put-out sequence of multiple groups of pressure plates according to the preset logic. For example, before the start of a certain equipment maintenance work, the operator selects the programmed operation of "equipment maintenance mode". The software control module automatically identifies the protection device trip outlet pressure plate, related signal pressure plate, etc. that need to be exited according to the preset logic, and generates the pressure plate exit sequence in a reasonable order. Then, the system sequentially executes the above-mentioned remote command sending, servo motor drive, status monitoring and feedback, logic verification and locking and other operating processes to realize the automatic batch put-in and put-out of multiple groups of pressure plates, greatly improving operational efficiency and reducing the tediousness and error rate of manual operation. During the programmed operation process, each step of the operation will be strictly verified and confirmed according to the preset logic to ensure the safety and accuracy of the entire batch operation.

[0050] Example

[0051] Taking a main transformer protection device of a certain substation as an example, the application of the intelligent pressure plate remote operation system of the present invention is explained.

[0052] 1. Equipment debugging status: During the debugging phase after a new installation of a main transformer or an upgrade of a protection device, operators need to frequently operate the tripping and closing outlet pressure plate of the protection device to verify the logical function and action accuracy of the protection device. At this time, the operator uses the software control module and its logic on / off function to conveniently control the opening and closing status of the hard pressure plate. During the debugging process, the software control module sends operating instructions to the servo motor drive module according to the preset debugging logic, driving the servo motor to accurately adjust the rotation angle of the hard pressure plate and achieve rapid on / off of the pressure plate. The auxiliary contact module monitors the status of the pressure plate in real time and feeds back the status signal to the background system for real-time viewing and analysis by the debugging personnel to ensure the smooth progress of the debugging work.

[0053] 2. Normal operating status of the equipment: When the main transformer is put into normal operation, the system monitors the opening and closing status of the hard pressure plate. Assume that at a certain moment, the auxiliary contact module detects that the status of a certain functional pressure plate is inconsistent with the operating setting status. It may be due to external interference or servo motor failure, which causes the pressure plate to malfunction. At this time, the lock and alarm module immediately triggers the lock mechanism, cuts off the relevant tripping circuit, and activates the sound and light alarm device, sending an alarm signal to the background system. After receiving the alarm, the operation and maintenance personnel quickly went to the site to check and found that the drive circuit of the servo motor was loose, causing the servo motor to fail to accurately drive the pressure plate to the target position. After the operation and maintenance personnel repaired the line, they initiated an unlocking application through the software control module. The system re-checked the pressure plate status and unlocked it after confirming that it was normal. The main transformer protection device resumed normal operation, effectively avoiding the main transformer tripping accident caused by abnormal pressure plate status, and ensuring the normal power supply of the substation.

[0054] 3. Equipment Maintenance Operations: When the main transformer is scheduled for maintenance, the tripping output pressure plates of the relevant protective devices must be disengaged to prevent malfunction during the maintenance process. The operator initiates a programmed batch operation command through the software control module in the background, based on the preset maintenance logic. Based on the settings in the programmed operation logic library, the software control module automatically generates a sequence for disengaging multiple pressure plates and sends the operation commands to the servo motor driver module in sequence. The servo motor driver module drives the corresponding hard pressure plate module to complete the pressure plate disengagement operation. The auxiliary contact module monitors and provides real-time feedback on the pressure plate status to ensure accurate operation at every step. After all pressure plate disengagement operations are completed, the system automatically blocks the relevant equipment access to prevent malfunctions and sends maintenance status information to the background system. After the maintenance work is completed, the operator again uses the software control module to restore the pressure plates to their normal state according to the activation and deactivation logic, and the main transformer resumes operation. The entire process is efficient, accurate, and safe, significantly reducing the workload and risk of error of manual operation.

[0055] To sum up, the intelligent pressure plate remote operation system and method of the present invention, through the collaborative work of various modules, realizes the remote control, programmed operation, status monitoring, logic verification, locking and alarm functions of the pressure plate of the power system protection device, effectively improves the efficiency, accuracy and safety of the pressure plate operation, provides strong support for the intelligent operation and maintenance and management of the power system, and has significant practical value and broad application prospects.

[0056] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above and, without departing from the purpose of the present invention, designs structures and embodiments similar to the technical solution without creatively designing, they shall fall within the scope of protection of the present invention.

Claims

1. The remote operating system of the platen based on servo motor and programmed control is characterized by: Including hard pressure plate module, servo motor drive module, software control module, auxiliary contact module, locking and alarm module; The hard pressure plate module is used to realize the physical opening and closing of the circuit through mechanical rotation, and control the tripping and closing output of the protection device and the maintenance status function; The servo motor driving module is mechanically connected to the hard pressing plate module, and drives the servo motor to rotate according to a set angle by receiving a control signal, thereby adjusting the rotation angle of the hard pressing plate to complete the on-off operation; The software control module is in communication with the servo motor drive module, and is used to send remote operation instructions to the servo motor drive module, and preset an AND gate program to verify the correctness of the operation logic based on the static angle of the servo motor and the auxiliary contact; The auxiliary contact module and the hard pressure plate module collect the opening and closing status and signals of the hard pressure plate in real time through different circuits, and transmit the status signals to the background system; The locking and alarm module is connected to the auxiliary contact module and the software control module. When the status of the hard pressure plate is detected to be inconsistent with the preset logic, the locking mechanism is triggered to cut off the remote control operation or program operation path, and an alarm signal is generated and sent to the background system; The servo motor drive module supports switching between manual operation mode and remote control mode, and the software control module contains a programmed operation logic library, which can automatically generate a pressure plate insertion and withdrawal sequence according to preset conditions, and embed it into the substation programmed operation process to complete one-button sequential control operation of primary and secondary equipment.

2. The remote control system for the pressing plate based on servo motor and programmed control according to claim 1 is characterized in that: The auxiliary contact module realizes status signal acquisition through mechanical limit switches, and the signal transmission adopts the anti-interference redundant dual-channel RS485 communication protocol, and triggers automatic switching to the backup channel when the signal is lost.

3. The remote control system for the pressing plate based on servo motor and programmed control according to claim 1 is characterized in that: The locking and alarm module integrates an audible and visual alarm device, and prohibits the execution of all remote operation instructions in the locked state.

4. The remote control system for a pressure plate based on a servo motor and programmed control according to claim 1 is characterized in that: The servo motor drive module uses a PID control algorithm to adjust the servo motor rotation angle and is equipped with an overload protection circuit to automatically cut off the power supply when it detects that the motor torque exceeds the limit.

5. The remote control system for the pressing plate based on servo motor and programmed control according to claim 1 is characterized in that: The software control module integrates a visual human-machine interface and supports real-time status display, operation history query and remote operation authority hierarchical management functions.

6. A remote operation method for a pressure plate based on a servo motor and programmed control, characterized in that: The following steps are involved: 1) Remote command transmission: The software control module sends an operation instruction to the servo motor drive module, and the instruction includes the type of the pressure plate and the target state; 2) Servo motor drive: After the servo motor drive module parses the instruction, it drives the servo motor to rotate to the specified angle, driving the hard pressure plate module to complete the physical on-off action; 3) Status monitoring and feedback: The auxiliary contact module detects the opening and closing status of the hard pressure plate in real time and feeds back the status signal to the software control module and the locking and alarm module; 4) Logic verification and interlocking: The software control module compares the current state with the preset logic. If the state does not match, the interlocking and alarm module is triggered to cut off the access to the relevant equipment and generate an alarm signal; 5) Abnormal handling and recovery: The operator checks the cause of the abnormality according to the alarm signal, and after correction, releases the lock through the software control module. The system re-executes the calibration and resumes normal operation.

7. The method for remotely operating a pressure plate based on a servo motor and programmed control according to claim 6, characterized in that: The method supports programmed batch operations and can automatically execute multiple groups of pressure plate insertion and withdrawal tasks according to preset logic.

8. The method for remotely operating a pressure plate based on a servo motor and programmed control according to claim 6, characterized in that: The operation instructions in step 1) include manual single-step operation instructions and programmed batch operation instructions, and the programmed operation must be executed after passing double password verification.

9. The method for remotely operating a pressure plate based on a servo motor and programmed control according to claim 6, characterized in that: Before sending the operation instruction in step 1), the operator's identity must be verified through face recognition or dynamic token, and an operation audit log must be generated in the background; The status monitoring and feedback in step 3) includes a CRC check on the integrity of the signal transmission. If the check fails, the status signal is automatically retransmitted at least three times.

10. The method for remotely operating a pressure plate based on a servo motor and programmed control according to claim 9, characterized in that: The dynamic token is confirmed by a double password.

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