Intelligent switch cabinet operation control system and method

Abstract

The application provides a kind of intelligent switch cabinet operation control system and method, including control unit, operating current acquisition module, soft start control unit, motor control unit, software anti-misoperation logic module, wherein, software anti-misoperation logic module is used to verify circuit breaker opening and closing state, electric chassis pose state, electric grounding knife opening and closing state and network cabinet door opening and closing state;Control unit is deployed in power monitoring system safety I area, and control unit is connected and interacted with remote host computer or sequential control host computer through communication interface, and communication interface supports the transmission of single task single command, combined task single command and combined task combined command, operating current acquisition module real-time acquisition motor operating current and wave recording, and wave recording data is uploaded to remote host computer or sequential control host computer for verification through communication interface.The application has low cost, with operating wave recording, soft start, multiple anti-misoperation and motor protection functions, to meet the requirements of "power monitoring system safety protection regulations" partition.

Description

Technical Field

[0001] This invention relates to the field of power system automation technology, specifically to an intelligent switchgear operation control system and method. Background Technology

[0002] With the advancement of enterprise power grid construction and the improvement of power system automation, the demand for one-button sequential control operation of 6kV to 10kV intelligent metal-enclosed armored high-voltage switchgear is becoming increasingly prominent. The existing intelligent monitoring devices for switchgear that integrate monitoring and sequential control have the problems of high cost and large size, which do not have obvious advantages in competitive projects, and cannot meet the zoning requirements in the "Regulations on Safety Protection of Power Monitoring Systems".

[0003] The disadvantages of existing technologies are as follows: (1) High costs and difficulty in market competition; (2) Large size, difficult to install; (3) It does not have the function of current acquisition and waveform recording for motor operation; (4) It does not have a soft start control function, which causes current to surge on the equipment and reduces the equipment life; (5) It does not have software error prevention function.

[0004] Therefore, there is an urgent need to develop a product that is primarily based on sequential control, has one-button sequential control and operation waveform recording functions, keeps costs within a reasonable range, is deployed in safety zone I, forms a high-end and low-end combination with existing devices, and is applied in competitive projects that are primarily based on one-button sequential control, with price advantage and operation waveform recording function as the main competitive advantages. Summary of the Invention

[0005] To address the problems of existing intelligent monitoring devices for switchgear that integrate monitoring and sequential control, such as high cost, large size, failure to meet safety zoning requirements, lack of operation waveform recording function, lack of soft start control and software error prevention function, this invention provides a low-cost, deployable intelligent switchgear operation control system and method with one-button sequential control and operation waveform recording functions in Safety Zone I.

[0006] The present invention achieves the above objectives through the following technical solutions: An intelligent switchgear operation and control system includes: Control unit; The current acquisition module uses a current sensor. The VCC pin of the current sensor is connected to the ADC channel of the control unit. The control unit synchronously acquires the VCC voltage to calculate the current acquisition accuracy. The soft-start control unit includes an IGBT Q2, a totem-pole drive circuit composed of transistors Q1 and Q3, and a high-frequency PWM control signal PWM1. The high-frequency PWM control signal PWM1 is connected to the timer pin of the control unit. The output of the totem-pole drive circuit is connected to the gate of the IGBT Q2. When PWM1 is high, the IGBT Q2 is turned on; when PWM1 is low, the IGBT Q2 is turned off. The IGBT Q2 is connected in series in the operating power supply circuit. The motor starting current is limited by controlling the operating power supply through high-frequency switching. The motor control unit adopts a single-coil forward and reverse rotation method, including relay K1, relay K2 and IGBT Q2. The GPIO1 pin of the control unit is connected to the coil control terminal of relay K1, and the GPIO2 pin of the control unit is connected to the coil control terminal of relay K2. The normally open contacts of relay K1 and relay K2 are connected to the DPC+ and DPC- terminals of the motor, respectively. IGBT Q2 is connected in series in the motor operating power supply circuit. The software anti-misoperation logic module is built into the control unit. The software anti-misoperation logic module is connected to the GPIO input pin of the control unit and is used to verify the circuit breaker opening and closing status, electric chassis vehicle position status, electric grounding switch opening and closing status, and cabinet door opening and closing status. The control unit is deployed in the safety zone I of the power monitoring system. The control unit connects and interacts with the remote host computer or sequential control host through the communication interface. The communication interface supports the transmission of single task single command, combined task single command, and combined task combined command. The operating current acquisition module collects the motor operating current in real time and records the waveform. The waveform data is sent to the remote host computer or sequential control host for verification through the communication interface.

[0007] According to the intelligent switchgear operation control system provided by the present invention, in the motor control unit, when GPIO1 is high and GPIO2 is low, relay K1 is energized and relay K2 is de-energized, the motor's DPC+ terminal is connected to the operating power supply +KM, and the motor's DPC- terminal is connected to the operating power supply +KM. When the high-frequency PWM control signal PWM1 controls the IGBT transistor Q2 to conduct, the motor rotates forward. When GPIO1 is low and GPIO2 is high, relay K1 is de-energized and relay K2 is energized, the motor's DPC+ terminal is connected to the operating power supply +KM, and the high-frequency PWM control signal PWM1 controls the IGBT transistor to conduct, the motor rotates in reverse.

[0008] According to the intelligent switchgear operation control system provided by the present invention, the control unit controls the forward and reverse rotation of the motor according to a predetermined timing sequence, wherein: When the motor rotates forward, the control unit executes actions in the following sequence: relay K1 turns on → IGBT Q2 turns on → IGBT Q2 turns off → relay K1 turns off. When the control motor reverses, the control unit executes actions in the following sequence: relay K2 turns on → IGBT Q2 turns on → IGBT Q2 turns off → relay K2 turns off.

[0009] According to the intelligent switchgear operation control system provided by the present invention, the control unit sets a time delay protection between relay operation and IGBT operation, wherein: When the motor is controlled to rotate forward, GPIO1 outputs a high level, GPIO2 outputs a low level, relay K1 is turned on, the motor's DPC+ terminal is connected to the operating power supply +KM, and the motor's DPC- terminal is connected to COM_OUT, thus establishing a power supply circuit for the motor to rotate forward. After relay K1 is turned on, after the first preset delay time T1, PWM1 outputs a drive signal, IGBT Q2 is turned on, and the motor rotates forward. When it is necessary to stop the motor from rotating forward, PWM1 stops outputting the drive signal, and IGBT Q2 is turned off. After the IGBT Q2 is turned off, after the second preset delay time T2, GPIO1 outputs a low level and GPIO2 outputs a high level, relay K1 is turned off, cutting off the motor power supply circuit; When the motor is reversed, GPIO1 outputs a low level and GPIO2 outputs a high level, relay K2 is turned on, the motor's DPC+ terminal is connected to COM_OUT, and the motor's DPC- terminal is connected to the operating power supply +KM, thus establishing the power supply circuit for motor reversal. After relay K2 is turned on, after the first preset delay time T1, PWM1 outputs a drive signal, IGBT Q2 is turned on, and the motor runs in reverse. When it is necessary to stop the motor from reversing, PWM1 stops outputting the drive signal, and IGBT Q2 is turned off. After the IGBT Q2 is turned off, after the second preset delay time T2, GPIO1 outputs a high level and GPIO2 outputs a low level, relay K2 is turned off, cutting off the motor power supply circuit; The first preset delay time T1 is not less than the stable closing time of the contacts of relay K1 or K2, and the second preset delay time T2 is not less than the turn-off tailing time of IGBT Q2.

[0010] According to the present invention, an intelligent switchgear operation control system includes a software anti-misoperation logic module with multiple interlocking conditions built-in for logically interlocking the actions of circuit breakers, electric grounding switches, electric chassis vehicles, and doors in each compartment, including: Interlocking condition 1: When the circuit breaker is in the closed state, the electric grounding switch must be in the open position; or, when the electric grounding switch is interlocked with the electric chassis vehicle and the electric chassis vehicle is in the test position, the electric grounding switch is allowed to be in the closed position. Interlocking condition 2: When the circuit breaker is in the closed state, the electric chassis vehicle must be in the test position or working position; Interlocking condition 3: When the electric chassis vehicle performs a rocking forward or rocking backward action, the circuit breaker must be in the open position, the electric grounding switch must be in the open position, and the mesh door or cabinet door associated with the electric chassis vehicle must be in the closed position. Interlocking condition 4: Before the electric grounding switch performs the closing action, the software anti-misoperation logic module first executes the verification of no power judgment program. Only when the verification of no power condition is met is the electric grounding switch allowed to perform the closing action. Interlocking condition 5: When the electric grounding switch performs a tripping or closing action, the electric chassis vehicle must be in the test position, and the mesh door or cabinet door associated with the electric grounding switch must be in the closed state. Interlocking condition six: When the circuit breaker compartment door is in the open position, the electric chassis vehicle must be in the test position; Interlocking condition seven: When the cable compartment door is opened or closed, the electric grounding switch must be in the closed position; If any interlocking condition is not met, the software error prevention logic module locks the corresponding operation command and outputs an alarm signal, prohibiting the execution of actions that violate the interlocking condition.

[0011] The intelligent switchgear operation control system provided by the present invention further includes a motor protection module, which includes a stall protection function. The motor protection module monitors the motor current value in real time. When the current value exceeds the preset stall current threshold and the duration exceeds the preset stall detection time, the motor is determined to be in a stall state. When the motor is determined to be in a stalled state, the motor protection module performs one of the following protection actions: Action 1: The control unit immediately stops the PWM1 output drive signal, IGBT Q2 is turned off, the motor stops running, and the current conducting state of relay K1 or K2 remains unchanged; Action 2: The control unit controls the motor to run in reverse, driving the electric chassis vehicle to retreat to the test position and then stopping the motor; When the motor is determined to be in a stalled state, the motor protection module immediately stops the PWM1 output drive signal, the IGBT Q2 is disconnected, and the motor immediately stops running. When the motor protection module determines that a stall has occurred, it sends a lockout signal to the software anti-misoperation logic module. The software anti-misoperation logic module locks all electric operation commands and prohibits any electric operation on the circuit breaker, electric grounding switch, and electric chassis until the stall condition is eliminated and the lockout is released after manual reset confirmation.

[0012] According to the present invention, an intelligent switchgear operation control system includes a motor protection module with an overtime protection function. The motor protection module has a built-in programmable timeout timer; When the motor starts running, the programmable timeout timer begins to start counting; When the programmable timeout timer reaches the set timeout period, the motor protection module immediately stops the PWM1 output drive signal, the IGBT Q2 is disconnected, the motor stops running immediately, and the motor protection module sends a timeout alarm signal to the host computer.

[0013] The intelligent switchgear operation control system provided by the present invention is further equipped with an operation interlocking device. The operation interlocking device is a hardware-level interlocking circuit, in which normally closed contacts controlled by the interlocking circuit are connected in series in all remote control operation control circuits, specifically including: The operation interlocking device includes an interlocking relay K3 and a normally closed contact K3-NC that is linked to the interlocking relay K3; the normally closed contact K3-NC is connected in series in the remote control operation control circuit; The coil of the interlocking relay K3 is jointly driven and controlled by the software anti-misoperation logic module and the motor protection module. When the software anti-misoperation logic module determines that any interlocking condition is not met, the software anti-misoperation logic module outputs the first interlocking signal to the coil of the interlocking relay K3, the interlocking relay K3 is energized, the normally closed contact K3-NC is opened, the remote control operation control circuit is cut off, and any remote control operation is prohibited. When the motor protection module determines that a stall has occurred or the timeout protection has been triggered, the motor protection module outputs a second lockout signal to the coil of the lockout relay K3. The lockout relay K3 is energized, and the normally closed contact K3-NC is opened, cutting off the remote control operation control circuit and prohibiting any remote control operation. When the software anti-misoperation logic module determines that all interlocking conditions are met and the motor protection module determines that there is no stall and no timeout protection is triggered, neither the software anti-misoperation logic module nor the motor protection module outputs a lockout signal. The lockout relay K3 is released, the normally closed contact K3-NC is restored to closed, the remote control operation control circuit is turned on, and remote control operation is allowed.

[0014] According to the present invention, an intelligent switchgear operation control system is provided, wherein the control unit directly controls the operation of the electric chassis vehicle and the electric grounding switch, specifically including: Remote control function: The control unit establishes a communication connection with the remote host computer through a communication interface. The remote host computer sends operation instructions to the control unit. After receiving the operation instructions, the control unit first sends the operation instructions to the software anti-misoperation logic module for interlocking condition verification, and then sends the verified operation instructions to the motor protection module for protection condition verification. When both the interlocking conditions and protection conditions are met, the control unit drives the electric chassis vehicle or electric grounding switch to perform the corresponding operation. Manual / automatic operation switching and locking function: The control unit is equipped with an operation mode selection switch, which includes a manual mode position and an automatic mode position. The control unit determines the current operation mode according to the current position of the operation mode selection switch. Operation results are sent to the sequential control host for verification: After the control unit drives the electric chassis vehicle or electric grounding switch to complete one operation, the control unit executes the following verification and upload process: The control unit collects the actual position status signals of the electric chassis vehicle or the electric grounding switch. The actual position status signals include one or more of the following: rocking in to position signal, rocking out to position signal, grounding switch closed signal, and grounding switch open signal. The control unit compares the actual position status signal with the target position status in the operation command to generate operation result verification data. The operation result verification data includes one or more of the following: whether the operation was successful, the actual position reached, and the operation time. The control unit sends the operation result verification data to the sequential control host through the communication interface; Step 4: After receiving the operation result verification data, the sequential control host compares the operation result verification data with the operation ticket pre-stored in the sequential control host. If the comparison is consistent, the sequential control host sends a verification pass confirmation signal to the control unit. The control unit records this operation as a successful operation and releases the relevant lock. If the comparison is inconsistent, the sequential control host sends a verification abnormality alarm signal to the control unit. The control unit executes abnormal handling actions.

[0015] A method for intelligent switchgear operation control, characterized in that the method is applied to the aforementioned intelligent switchgear operation control system, and includes the following steps: S1: The control unit receives the operation command and determines the type of the operation command. When the operation command is a circuit breaker operation command, the control unit controls the circuit breaker to open or close through the protection device operation circuit. When the operation command is an electric chassis vehicle or electric grounding switch operation command, the control unit directly drives the electric chassis vehicle or electric grounding switch to perform the corresponding operation. S2: The control unit establishes bidirectional communication with the sequential control host, and receives operation commands from the sequential control host. The operation commands include one of the following: single task single command, combined task single command, and combined task combined command, and execute single control operation, sequential control operation, or combined control operation. S3: During the motor startup process of the electric chassis vehicle or electric grounding switch, the control unit controls the IGBT tube to switch on and off through the high-frequency square wave of PWM1 to achieve soft start of the motor and limit the motor starting current to within 2 to 3 times the rated current. S4: Real-time acquisition of motor operating current, recording and storing the operating current, calculating the peak value, effective value and waveform characteristics of motor current based on the recorded data, and analyzing whether the motor operation process is normal. S5: Perform software error prevention logic verification. When any interlocking condition is not met, the control unit immediately locks the current operation, prohibits the output of drive signals, and sends lockout alarm information to the sequential control host and the local operation panel at the same time. S6: After the operation is completed, the operation result verification data is sent to the sequential control host. The sequential control host compares and verifies the operation result verification data with the pre-stored operation ticket.

[0016] Therefore, compared with the prior art, the intelligent switchgear operation control system and method proposed in this invention have the following beneficial effects: 1. This invention focuses on sequential control operation, stripping away unnecessary monitoring functions and keeping product costs below 1,000 yuan. Compared with the original intelligent monitoring device that integrates monitoring and sequential control, the cost is significantly reduced. In competitive projects where one-click sequential control is the main feature, it forms a high-end and low-end combination with high-end devices with its price advantage, significantly enhancing market competitiveness.

[0017] 2. This invention is deployed in Security Zone I of the power monitoring system, which meets the requirements of the "Regulations on Security Protection of Power Monitoring Systems" regarding security zoning. It solves the problem that the original integrated monitoring and control device could not meet the security zoning deployment requirements due to its mixed functions, thus ensuring the safe operation of the power monitoring system.

[0018] 3. This invention realizes one-button sequential control of circuit breakers, electric chassis vehicles and electric grounding switches, supports multiple control command forms such as single task single command, combined task single command and combined task combined command, and supports the switching and interlocking of remote control, manual operation and automatic operation, which greatly improves the operation efficiency of switchgear and reduces the intensity of manual operation and the risk of misoperation.

[0019] 4. This invention uses IGBT high-frequency on / off control to achieve soft starting of the motor, limiting the starting current to 2 to 3 times the rated current (the starting current of the motor can reach 5 to 7 times the rated current when starting directly), effectively reducing the current surge in the motor windings and bearings, and extending the service life of the equipment; at the same time, soft starting can avoid sudden drops in grid voltage, improve power supply reliability, and meet the power quality requirements of smart grids.

[0020] 5. This invention features multiple motor protection functions: first, soft-start protection, limiting the starting current; second, motor stall protection, allowing the motor to stop and retract to the test position when stalled, and immediately stop when stalled again, locking electric operation after stalling; third, overtime protection, with a programmable overtime period, immediately stopping the motor after the overtime period. These protection mechanisms effectively prevent equipment damage caused by abnormal motor operation, ensuring the safe and stable operation of the switchgear.

[0021] 6. This invention employs a dual anti-misoperation scheme combining hardware anti-misoperation circuitry and software anti-misoperation logic. The software anti-misoperation logic includes 11 interlocking conditions, covering multi-dimensional interlocking verification of circuit breaker opening and closing, electric chassis vehicle rocking in / out, electric grounding switch opening and closing, cabinet door opening and closing status, etc. Automatic interlocking operation is triggered if any condition is not met. The hardware anti-misoperation circuit connects the contacts controlled by the interlocking circuit in series in the remote control operation control loop, strictly prohibiting any empty program runs. This effectively prevents misoperation from both hardware and software levels, avoiding equipment damage and personal injury accidents.

[0022] 7. This invention adopts a simplified design based on sequential control, which is compact, easy to install, and suitable for switch cabinets of different sizes. It overcomes the shortcomings of the original integrated monitoring and sequential control device, which is large in size and difficult to install, and is easy to deploy flexibly in various cabinet spaces.

[0023] 8. The motor control circuit of this invention adopts a relay + IGBT approach, which is less expensive than the traditional H-bridge circuit. At the same time, it adopts a reasonable operation sequence (relay on → IGBT on → IGBT off → relay off) to prevent the relay from sticking when it is engaged / disengaged, which reduces hardware costs and improves the reliability of the operation circuit.

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of an embodiment of an intelligent switchgear operation and control system of the present invention.

[0026] Figure 2 This is a schematic diagram illustrating the interaction principle between the control unit and sequential control in an embodiment of an intelligent switchgear operation and control system of the present invention.

[0027] Figure 3 This is a logic hardware circuit diagram of the control unit in an embodiment of an intelligent switchgear operation and control system of the present invention.

[0028] Figure 4 This is a circuit diagram of the operating current acquisition module in an embodiment of an intelligent switchgear operation control system of the present invention.

[0029] Figure 5 This is a circuit diagram of the soft-start control unit in an embodiment of an intelligent switchgear operation and control system of the present invention.

[0030] Figure 6 This is a circuit diagram of the motor control unit in an embodiment of an intelligent switchgear operation and control system of the present invention. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0032] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0033] An embodiment of an intelligent switchgear operation control system See Figures 1 to 6 This embodiment provides an intelligent switchgear operation control system, including: The control unit uses a high-end microcontroller with a main frequency of no less than 600MHz; The operating current acquisition module uses a CC6920SO-10A Hall effect current sensor. The VCC pin of the current sensor is connected to the ADC channel of the control unit. The control unit synchronously acquires the VCC voltage to calculate the current acquisition accuracy. The soft-start control unit includes an IGBT Q2, a totem-pole drive circuit composed of transistors Q1 and Q3, and a high-frequency PWM control signal PWM1. The high-frequency PWM control signal PWM1 is connected to the timer pin of the control unit. The output of the totem-pole drive circuit is connected to the gate of the IGBT Q2. When PWM1 is high, the IGBT Q2 is turned on; when PWM1 is low, the IGBT Q2 is turned off. The IGBT Q2 is connected in series in the operating power supply circuit. The motor starting current is limited by controlling the operating power supply through high-frequency switching. The motor control unit adopts a single-coil forward and reverse rotation method, including relay K1, relay K2 and IGBT Q2. The GPIO1 pin of the control unit is connected to the coil control terminal of relay K1, and the GPIO2 pin of the control unit is connected to the coil control terminal of relay K2. The normally open contacts of relay K1 and relay K2 are connected to the DPC+ and DPC- terminals of the motor, respectively. IGBT Q2 is connected in series in the motor operating power supply circuit. The software anti-misoperation logic module is built into the control unit. The software anti-misoperation logic module is connected to the GPIO input pin of the control unit and is used to verify the circuit breaker opening and closing status, electric chassis vehicle position status, electric grounding switch opening and closing status, and cabinet door opening and closing status. If any interlocking condition is not met, the output of the motor control unit is locked. The control unit is deployed in the safety zone I of the power monitoring system. The control unit connects and interacts with the remote host computer or sequential control host through the communication interface. The communication interface supports the transmission of single task single command, combined task single command, and combined task combined command. The operating current acquisition module collects the motor operating current in real time and records the waveform. The waveform data is sent to the remote host computer or sequential control host for verification through the communication interface.

[0034] Furthermore, such as Figure 3 As shown, this embodiment uses a high-end microcontroller with a main frequency of up to 600MHz, which can collect the motor opening and closing operation current in real time and perform waveform analysis to ensure the integrity and accuracy of the operation waveform data, providing a real-time and reliable data foundation for equipment status monitoring and fault diagnosis.

[0035] Specifically, this embodiment uses the GD32H759IMT6 microcontroller as the control core, and its pin connections are as follows: Reset and Watchdog: The RST pin is connected to the WDG (watchdog) circuit for system reset monitoring; Memory interface: The SPI interface connects FRAM (ferroelectric memory) and NOR FLASH (program memory) for data storage and program execution; Real-time clock: The IIC interface connects to the RTC (Real-Time Clock) module to provide a time base; Analog signal acquisition: The ADC pin is connected to the operating current acquisition circuit to acquire the motor operating current in real time; Communication interfaces: The UART interface enables communication with external devices via an RS485 conversion circuit, and the RMII interface enables network communication via an electrical port conversion circuit. Digital control: The GPIO pins are connected to the input detection circuit, the output control circuit, the chassis / grounding switch operation drive circuit, and the PWM pin is connected to the soft start control circuit.

[0036] The AC220V input power is converted to 5V system power by the LH15-23B05R2 power module. The 5V system power is then regulated to 3.3V by the LM1085IS-3.3 linear regulator to power the core microcontroller GD32H759IMT6 and peripheral circuits.

[0037] The input detection circuit inputs switch status signals to the microcontroller through GPIO pins; the output control circuit outputs control signals to drive external devices through GPIO pins; the chassis vehicle / grounding switch operation drive circuit controls the forward and reverse rotation of the motor through GPIO pins; the soft start control unit outputs high-frequency square wave signals through PWM pins to control the on / off state of the IGBT to achieve soft start of the motor; the operating current acquisition unit converts the current signal into a digital quantity through ADC pins for processing by the microcontroller.

[0038] Furthermore, such as Figure 4 As shown, this embodiment uses a CC6920SO-10A Hall effect current sensor to collect the motor operating current in real time and record the current waveform during the operation process. After the operation is completed, the motor operation process can be analyzed based on the recorded waveform data, providing reliable data support for equipment fault diagnosis and operating status assessment. This is a function that the original device did not have.

[0039] In the motor control unit, when GPIO1 is high and GPIO2 is low, relay K1 is energized and relay K2 is de-energized. The motor's DPC+ terminal is connected to the operating power supply +KM, and the motor's DPC- terminal is connected to the operating power supply +KM. When the high-frequency PWM control signal PWM1 controls the IGBT Q2 to conduct, the motor rotates forward. When GPIO1 is low and GPIO2 is high, relay K1 is de-energized and relay K2 is energized. The motor's DPC+ terminal is connected to the operating power supply +KM, and the high-frequency PWM control signal PWM1 controls the IGBT to conduct, and the motor rotates in reverse.

[0040] In this embodiment, the control unit controls the forward and reverse rotation of the motor according to a predetermined timing sequence, wherein: When the motor rotates forward, the control unit executes actions in the following sequence: relay K1 turns on → IGBT Q2 turns on → IGBT Q2 turns off → relay K1 turns off. When the control motor reverses, the control unit executes actions in the following sequence: relay K2 turns on → IGBT Q2 turns on → IGBT Q2 turns off → relay K2 turns off.

[0041] Furthermore, the control unit incorporates a time delay protection between relay operation and IGBT operation, wherein: When the motor is controlled to rotate forward, GPIO1 outputs a high level, GPIO2 outputs a low level, relay K1 is turned on, the motor's DPC+ terminal is connected to the operating power supply +KM, and the motor's DPC- terminal is connected to COM_OUT, thus establishing a power supply circuit for the motor to rotate forward. After relay K1 is turned on, after the first preset delay time T1, PWM1 outputs a drive signal, IGBT Q2 is turned on, and the motor rotates forward. When it is necessary to stop the motor from rotating forward, PWM1 stops outputting the drive signal, and IGBT Q2 is turned off. After the IGBT Q2 is turned off, after the second preset delay time T2, GPIO1 outputs a low level and GPIO2 outputs a high level, relay K1 is turned off, cutting off the motor power supply circuit; When the motor is reversed, GPIO1 outputs a low level and GPIO2 outputs a high level, relay K2 is turned on, the motor's DPC+ terminal is connected to COM_OUT, and the motor's DPC- terminal is connected to the operating power supply +KM, thus establishing the power supply circuit for motor reversal. After relay K2 is turned on, after the first preset delay time T1, PWM1 outputs a drive signal, IGBT Q2 is turned on, and the motor runs in reverse. When it is necessary to stop the motor from reversing, PWM1 stops outputting the drive signal, and IGBT Q2 is turned off. After the IGBT Q2 is turned off, after the second preset delay time T2, GPIO1 outputs a high level and GPIO2 outputs a low level, relay K2 is turned off, cutting off the motor power supply circuit; The first preset delay time T1 is not less than the stable closing time of the contacts of relay K1 or K2, and the second preset delay time T2 is not less than the turn-off tailing time of IGBT Q2.

[0042] In this embodiment, the software anti-misoperation logic module has built-in multiple interlocking conditions for logically interlocking the actions of the circuit breaker, electric grounding switch, electric chassis vehicle, and each compartment door, including: Interlocking condition 1: When the circuit breaker is in the closed state, the electric grounding switch must be in the open position; or, when the electric grounding switch is interlocked with the electric chassis vehicle and the electric chassis vehicle is in the test position, the electric grounding switch is allowed to be in the closed position. Interlocking condition 2: When the circuit breaker is in the closed state, the electric chassis vehicle must be in the test position or working position; Interlocking condition 3: When the electric chassis vehicle performs a rocking forward or rocking backward action, the circuit breaker must be in the open position, the electric grounding switch must be in the open position, and the mesh door or cabinet door associated with the electric chassis vehicle must be in the closed position. Interlocking condition 4: Before the electric grounding switch performs the closing action, the software anti-misoperation logic module first executes the verification of no power judgment program. Only when the verification of no power condition is met is the electric grounding switch allowed to perform the closing action. Interlocking condition 5: When the electric grounding switch performs a tripping or closing action, the electric chassis vehicle must be in the test position, and the mesh door or cabinet door associated with the electric grounding switch must be in the closed state. Interlocking condition six: When the circuit breaker compartment door is in the open position, the electric chassis vehicle must be in the test position; Interlocking condition seven: When the cable compartment door is opened or closed, the electric grounding switch must be in the closed position; If any interlocking condition is not met, the software error prevention logic module locks the corresponding operation command and outputs an alarm signal, prohibiting the execution of actions that violate the interlocking condition.

[0043] In this embodiment, a motor protection module is also included, which includes stall protection and timeout protection functions. Stall protection function: The motor protection module monitors the motor current value in real time. When the current value exceeds the preset stall current threshold and the duration exceeds the preset stall detection time, the motor is determined to be in a stall state. When the motor is determined to be in a stalled state, the motor protection module performs one of the following protection actions: Action 1: The control unit immediately stops the PWM1 output drive signal, IGBT Q2 is turned off, the motor stops running, and the current conducting state of relay K1 or K2 remains unchanged; Action 2: The control unit controls the motor to run in reverse, driving the electric chassis vehicle to retreat to the test position and then stopping the motor; When the motor is determined to be in a stalled state, the motor protection module immediately stops the PWM1 output drive signal, the IGBT Q2 is disconnected, and the motor immediately stops running. When the motor protection module determines that a stall has occurred, it sends a lockout signal to the software anti-misoperation logic module. The software anti-misoperation logic module locks all electric operation commands and prohibits any electric operation on the circuit breaker, electric grounding switch, and electric chassis until the stall condition is eliminated and the lockout is released after manual reset confirmation.

[0044] Timeout protection function: The motor protection module has a built-in programmable timeout timer. The timeout period of the programmable timeout timer can be modified through the host computer or local parameter setting interface. The adjustable range of the timeout period is T3_min~T3_max. When the motor starts running, the programmable timeout timer begins to start counting; When the programmable timeout timer reaches the set timeout period, the motor protection module immediately stops the PWM1 output drive signal, the IGBT Q2 is turned off, the motor stops running immediately, and the motor protection module sends a timeout alarm signal to the host computer at the same time. Among them, the stall protection function and the overtime protection function operate independently, and the motor can be stopped independently when either protection function is triggered.

[0045] In this embodiment, an operation interlocking device is also provided. The operation interlocking device is a hardware-level interlocking circuit, in which normally closed contacts controlled by the interlocking circuit are connected in series in all remote control operation control circuits. Specifically, it includes: The interlocking device includes an interlocking relay K3 and a normally closed contact K3-NC that is linked to the interlocking relay K3; The normally closed contact K3-NC is connected in series in the remote control circuit, which includes, but is not limited to: Circuit breaker tripping control circuit; Circuit breaker closing control circuit; Electric grounding switch tripping control circuit; Electric grounding switch closing control circuit; The electric chassis vehicle is rocked into the control circuit; Electric chassis vehicle rocking back control circuit; The coil of the latching relay K3 is jointly driven and controlled by the software anti-misoperation logic module and the motor protection module, specifically including: When the software anti-misoperation logic module determines that any interlocking condition is not met, the software anti-misoperation logic module outputs the first interlocking signal to the coil of the interlocking relay K3. The interlocking relay K3 is energized, the normally closed contact K3-NC is opened, the remote control operation control circuit is cut off, and any remote control operation is prohibited. When the motor protection module determines that a stall has occurred or the timeout protection has been triggered, the motor protection module outputs a second lockout signal to the coil of the lockout relay K3. The lockout relay K3 is energized, and the normally closed contact K3-NC is opened, cutting off the remote control operation control circuit and prohibiting any remote control operation. When the software anti-misoperation logic module determines that all interlocking conditions are met and the motor protection module determines that there is no stall and no timeout protection is triggered, neither the software anti-misoperation logic module nor the motor protection module outputs a lockout signal. The lockout relay K3 is released, the normally closed contact K3-NC is restored to closed, the remote control operation control circuit is turned on, and remote control operation is allowed. Among them, the operation interlocking device operates independently of the software anti-misoperation logic module. When the software anti-misoperation logic module malfunctions or crashes, the motor protection module can still independently output the second interlocking signal to drive the interlocking relay K3 to operate, ensuring that the remote control operation control circuit is reliably cut off under any abnormal circumstances.

[0046] The control unit communicates with the software anti-misoperation logic module, the motor protection module, and the operation interlocking device. The control unit directly controls the operation of the electric chassis vehicle and the electric grounding switch, specifically including: Remote control function: The control unit establishes a communication connection with the remote host computer through a communication interface. The remote host computer sends operation instructions to the control unit. After receiving the operation instructions, the control unit first sends the operation instructions to the software anti-misoperation logic module for interlocking condition verification, and then sends the verified operation instructions to the motor protection module for protection condition verification. When both the interlocking conditions and protection conditions are met, the control unit drives the electric chassis vehicle or electric grounding switch to perform the corresponding operation. Manual / automatic operation switching and locking function: The control unit is equipped with an operation mode selection switch, which includes a manual mode position and an automatic mode position. The control unit determines the current operation mode according to the current position of the operation mode selection switch. When the operation mode selection switch is in the manual mode position: The control unit allows operators to send operation commands directly through the local manual operation panel. After receiving the manual operation command, the control unit sequentially executes the interlocking condition verification of the software anti-misoperation logic module and the protection condition verification of the motor protection module. After the verification is passed, the electric chassis vehicle or electric grounding switch is driven to perform the corresponding operation. At the same time, the control unit blocks all automatic operation commands from the remote host computer and prohibits the execution of any remote automatic operation. When the operation mode selection switch is in the automatic mode position: The control unit allows a remote host computer or sequential control host to send automatic operation commands. After receiving the automatic operation command, the control unit sequentially executes the interlocking condition verification of the software anti-misoperation logic module and the protection condition verification of the motor protection module. After the verification is passed, the electric chassis vehicle or electric grounding switch is driven to perform the corresponding operation. At the same time, the control unit blocks all manual operation commands from the local manual operation panel and prohibits the execution of any local manual operation. Manual and automatic modes are mutually interlocked, specifically including: When the control unit is in manual mode, if it detects an automatic operation command from a remote host computer or sequential control host, the control unit will directly discard the automatic operation command and output a mode conflict alarm signal. When the control unit is in automatic mode, if a manual operation command is detected from the local manual operation panel, the control unit will discard the manual operation command and output a mode conflict alarm signal. When the operation mode selection switch is switched from manual mode to automatic mode, or from automatic mode to manual mode, the control unit executes the mode switching confirmation procedure. The mode switching confirmation procedure includes: confirming that there is no operation command being executed, confirming that the electric chassis vehicle and the electric grounding switch are both stationary, and confirming that all interlocking conditions of the software anti-misoperation logic module are met. Only when all three conditions are met will the control unit allow the mode switching to be completed; otherwise, the control unit will lock the operation mode selection switch and output a switching prohibition alarm signal. Operation results are sent to the sequential control host for verification: After the control unit drives the electric chassis vehicle or electric grounding switch to complete one operation, the control unit executes the following verification and upload process: Step 1: The control unit collects the actual position status signal of the electric chassis vehicle or the electric grounding switch. The actual position status signal includes one or more of the following: rocking in to position signal, rocking out to position signal, grounding switch closed signal, and grounding switch open signal. Step 2: The control unit compares the actual position status signal with the target position status in the operation command to generate operation result verification data. The operation result verification data includes one or more of the following: whether the operation was successful, the actual position reached, and the operation time. Step 3: The control unit sends the operation result verification data to the sequential control host through the communication interface; Step 4: After receiving the operation result verification data, the sequential control host compares the operation result verification data with the operation ticket pre-stored in the sequential control host. If they match, the sequential control host sends a verification pass confirmation signal to the control unit, which records the operation as successful and releases the relevant interlock. If they do not match, the sequential control host sends a verification error alarm signal to the control unit, which immediately performs the following error handling actions: The drive operation interlock device is activated, the interlock relay K3 is energized, the normally closed contact K3-NC is opened, and all remote control operation control circuits are cut off. Simultaneously send operation abnormality alarm information to both the remote host computer and the local operation panel; Lock the electric chassis vehicle and the electric grounding switch, and prohibit any subsequent operations until manual intervention confirms and resolves the abnormal state.

[0047] An embodiment of an intelligent switchgear operation control method This embodiment provides an intelligent switchgear operation control method, which is applied to the above-mentioned intelligent switchgear operation control system and includes the following steps: S1: The control unit receives the operation command and determines the type of the operation command. When the operation command is a circuit breaker operation command, the control unit controls the circuit breaker to open or close through the protection device operation circuit. When the operation command is an electric chassis vehicle or electric grounding switch operation command, the control unit directly drives the electric chassis vehicle or electric grounding switch to perform the corresponding operation. S2: The control unit establishes bidirectional communication with the sequential control host, and receives operation commands from the sequential control host. The operation commands include one of the following: single task single command, combined task single command, and combined task combined command, and execute single control operation, sequential control operation, or combined control operation. S3: During the motor startup process of the electric chassis vehicle or electric grounding switch, the control unit controls the IGBT tube to switch on and off through the high-frequency square wave of PWM1 to achieve soft start of the motor and limit the motor starting current to within 2 to 3 times the rated current. S4: Real-time acquisition of motor operating current, recording and storing the operating current, calculating the peak value, effective value and waveform characteristics of motor current based on the recorded data, and analyzing whether the motor operation process is normal. S5: Perform software error prevention logic verification. When any interlocking condition is not met, the control unit immediately locks the current operation, prohibits the output of drive signals, and sends lockout alarm information to the sequential control host and the local operation panel at the same time. S6: After the operation is completed, the operation result verification data is sent to the sequential control host. The sequential control host compares and verifies the operation result verification data with the pre-stored operation ticket.

[0048] In step S2 above, when a single task single command is received, the control unit performs a single control operation, completes the disconnection or connection of a single device, and then returns to the standby state. When a combined task order command is received, the control unit executes the sequential control operations of multiple devices in the order of device actions preset in the combined task order command. When a combined task command is received, the control unit decomposes the combined task command into multiple sub-tasks and executes the combined control operations of multiple groups of devices in parallel or sequentially.

[0049] In step S3 above, the frequency of the PWM1 high-frequency square wave is not less than 10kHz, the duty cycle gradually increases linearly from 0% to 100%, and the soft start time does not exceed 500ms.

[0050] In step S4 above, when the waveform data shows that the motor current exceeds 3 times the rated current and the duration exceeds 200ms, the motor is determined to be operating abnormally, and the protection action is triggered.

[0051] In step S5 above, before performing any operation, the control unit performs software anti-misoperation logic verification, which includes one or more of the following: equipment status verification, electrical interlock verification, and mechanical interlock verification.

[0052] In step S6 above, after the operation is completed, the control unit collects the actual position status signal of the controlled device, compares the actual position status signal with the target position status in the operation command, and generates operation result verification data. The control unit sends the operation result verification data to the sequential control host through the communication interface; The sequential control host compares and verifies the operation result verification data with the pre-stored operation ticket; When the comparison is successful, the sequential control host sends a verification confirmation signal, the control unit records the operation as a successful operation and releases the phase lock; When the comparison is inconsistent, the sequential control host sends out a verification abnormality alarm signal, the control unit drives the operation interlock device to act, cuts off all remote control operation control loops, locks the controlled equipment, and prohibits any subsequent operation until manual intervention confirms and resolves the abnormal state.

[0053] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. An intelligent switchgear operation control system, characterized in that, include: Control unit; The current acquisition module uses a current sensor. The VCC pin of the current sensor is connected to the ADC channel of the control unit. The control unit synchronously acquires the VCC voltage to calculate the current acquisition accuracy. The soft-start control unit includes an IGBT Q2, a totem-pole drive circuit composed of transistors Q1 and Q3, and a high-frequency PWM control signal PWM1. The high-frequency PWM control signal PWM1 is connected to the timer pin of the control unit. The output of the totem-pole drive circuit is connected to the gate of the IGBT Q2. When PWM1 is high, the IGBT Q2 is turned on; when PWM1 is low, the IGBT Q2 is turned off. The IGBT Q2 is connected in series in the operating power supply circuit. The motor starting current is limited by controlling the operating power supply through high-frequency switching. The motor control unit adopts a single-coil forward and reverse rotation method, including relay K1, relay K2 and IGBT Q2. The GPIO1 pin of the control unit is connected to the coil control terminal of relay K1, and the GPIO2 pin of the control unit is connected to the coil control terminal of relay K2. The normally open contacts of relay K1 and relay K2 are connected to the DPC+ and DPC- terminals of the motor, respectively. IGBT Q2 is connected in series in the motor operating power supply circuit. The software anti-misoperation logic module is built into the control unit. The software anti-misoperation logic module is connected to the GPIO input pin of the control unit and is used to verify the circuit breaker opening and closing status, electric chassis vehicle position status, electric grounding switch opening and closing status, and cabinet door opening and closing status. The control unit is deployed in the safety zone I of the power monitoring system. The control unit connects and interacts with the remote host computer or sequential control host through the communication interface. The communication interface supports the transmission of single task single command, combined task single command, and combined task combined command. The operating current acquisition module collects the motor operating current in real time and records the waveform. The waveform data is sent to the remote host computer or sequential control host for verification through the communication interface.

2. The system according to claim 1, characterized in that: In the motor control unit, when GPIO1 is high and GPIO2 is low, relay K1 is energized and relay K2 is de-energized. The motor's DPC+ terminal is connected to the operating power supply +KM, and the motor's DPC- terminal is connected to the operating power supply +KM. When the high-frequency PWM control signal PWM1 controls the IGBT Q2 to conduct, the motor rotates forward. When GPIO1 is low and GPIO2 is high, relay K1 is de-energized and relay K2 is energized. The motor's DPC+ terminal is connected to the operating power supply +KM, and the high-frequency PWM control signal PWM1 controls the IGBT to conduct, and the motor rotates in reverse.

3. The system according to claim 2, characterized in that, The control unit controls the forward and reverse rotation of the motor according to a predetermined timing sequence, wherein: When the motor rotates forward, the control unit executes actions in the following sequence: relay K1 turns on → IGBT Q2 turns on → IGBT Q2 turns off → relay K1 turns off. When the control motor reverses, the control unit executes actions in the following sequence: relay K2 turns on → IGBT Q2 turns on → IGBT Q2 turns off → relay K2 turns off.

4. The system according to claim 3, characterized in that, The control unit incorporates a time delay protection between relay operation and IGBT operation, wherein: When the motor is controlled to rotate forward, GPIO1 outputs a high level, GPIO2 outputs a low level, relay K1 is turned on, the motor's DPC+ terminal is connected to the operating power supply +KM, and the motor's DPC- terminal is connected to COM_OUT, thus establishing a power supply circuit for the motor to rotate forward. After relay K1 is turned on, and after the first preset delay time T1, PWM1 outputs a drive signal, IGBT Q2 is turned on, and the motor rotates forward. When it is necessary to stop the motor from rotating forward, PWM1 stops outputting the drive signal, and IGBT Q2 is turned off. After IGBT Q2 is turned off, after the second preset delay time T2, GPIO1 outputs a low level and GPIO2 outputs a high level, relay K1 is turned off, cutting off the motor power supply circuit; When the motor is reversed, GPIO1 outputs a low level and GPIO2 outputs a high level, relay K2 is turned on, the motor's DPC+ terminal is connected to COM_OUT, and the motor's DPC- terminal is connected to the operating power supply +KM, thus establishing the power supply circuit for motor reversal. After relay K2 is turned on, after the first preset delay time T1, PWM1 outputs a drive signal, IGBT Q2 is turned on, and the motor runs in reverse. When it is necessary to stop the motor from reversing, PWM1 stops outputting the drive signal, and IGBT Q2 is turned off. After the IGBT Q2 is turned off, after the second preset delay time T2, GPIO1 outputs a high level and GPIO2 outputs a low level, relay K2 is turned off, cutting off the motor power supply circuit; The first preset delay time T1 is not less than the stable closing time of the contacts of relay K1 or K2, and the second preset delay time T2 is not less than the turn-off tailing time of IGBT Q2.

5. The system according to claim 1, characterized in that, The software's anti-misoperation logic module has multiple interlocking conditions built-in to logically interlock the actions of circuit breakers, electric grounding switches, electric chassis vehicles, and various doors, including: Interlocking condition 1: When the circuit breaker is in the closed state, the electric grounding switch must be in the open position; or, when the electric grounding switch is interlocked with the electric chassis vehicle and the electric chassis vehicle is in the test position, the electric grounding switch is allowed to be in the closed position. Interlocking condition 2: When the circuit breaker is in the closed state, the electric chassis vehicle must be in the test position or working position; Interlocking condition 3: When the electric chassis vehicle performs a rocking forward or rocking backward action, the circuit breaker must be in the open position, the electric grounding switch must be in the open position, and the mesh door or cabinet door associated with the electric chassis vehicle must be in the closed position. Interlocking condition 4: Before the electric grounding switch performs the closing action, the software anti-misoperation logic module first executes the verification of no power judgment program. Only when the verification of no power condition is met is the electric grounding switch allowed to perform the closing action. Interlocking condition 5: When the electric grounding switch performs a tripping or closing action, the electric chassis vehicle must be in the test position, and the mesh door or cabinet door associated with the electric grounding switch must be in the closed state. Interlocking condition six: When the circuit breaker compartment door is in the open position, the electric chassis vehicle must be in the test position; Interlocking condition seven: When the cable compartment door is opened or closed, the electric grounding switch must be in the closed position; If any interlocking condition is not met, the software error prevention logic module locks the corresponding operation command and outputs an alarm signal, prohibiting the execution of actions that violate the interlocking condition.

6. The system according to claim 1, characterized in that, It also includes a motor protection module, which includes stall protection functionality. The motor protection module monitors the motor current value in real time. When the current value exceeds the preset stall current threshold and the duration exceeds the preset stall detection time, the motor is determined to be in a stall state. When the motor is determined to be in a stalled state, the motor protection module performs one of the following protection actions: Action 1: The control unit immediately stops the PWM1 output drive signal, IGBT Q2 is turned off, the motor stops running, and the current conducting state of relay K1 or K2 remains unchanged; Action 2: The control unit controls the motor to run in reverse, driving the electric chassis vehicle to retreat to the test position and then stopping the motor; When the motor is determined to be in a stalled state, the motor protection module immediately stops the PWM1 output drive signal, the IGBT Q2 is disconnected, and the motor immediately stops running. When the motor protection module determines that a stall has occurred, it sends a lockout signal to the software anti-misoperation logic module. The software anti-misoperation logic module locks all electric operation commands and prohibits any electric operation on the circuit breaker, electric grounding switch, and electric chassis until the stall condition is eliminated and the lockout is released after manual reset confirmation.

7. The system according to claim 6, characterized in that, The motor protection module includes an overtime protection function: The motor protection module has a built-in programmable timeout timer; When the motor starts running, the programmable timeout timer begins to start counting; When the programmable timeout timer reaches the set timeout period, the motor protection module immediately stops the PWM1 output drive signal, the IGBT Q2 is disconnected, the motor stops running immediately, and the motor protection module sends a timeout alarm signal to the host computer.

8. The system according to any one of claims 1 to 7, characterized in that, It is also equipped with an operation interlocking device, which is a hardware-level interlocking circuit. Normally closed contacts controlled by the interlocking circuit are connected in series in all remote control operation control circuits. Specifically, these include: The operation interlocking device includes an interlocking relay K3 and a normally closed contact K3-NC that is linked to the interlocking relay K3; the normally closed contact K3-NC is connected in series in the remote control operation control circuit; The coil of the interlocking relay K3 is jointly driven and controlled by the software anti-misoperation logic module and the motor protection module. When the software anti-misoperation logic module determines that any interlocking condition is not met, the software anti-misoperation logic module outputs the first interlocking signal to the coil of the interlocking relay K3, the interlocking relay K3 is energized, the normally closed contact K3-NC is opened, the remote control operation control circuit is cut off, and any remote control operation is prohibited. When the motor protection module determines that a stall has occurred or the timeout protection has been triggered, the motor protection module outputs a second lockout signal to the coil of the lockout relay K3. The lockout relay K3 is energized, and the normally closed contact K3-NC is opened, cutting off the remote control operation control circuit and prohibiting any remote control operation. When the software anti-misoperation logic module determines that all interlocking conditions are met and the motor protection module determines that there is no stall and no timeout protection is triggered, neither the software anti-misoperation logic module nor the motor protection module outputs a lockout signal. The lockout relay K3 is released, the normally closed contact K3-NC is restored to closed, the remote control operation control circuit is turned on, and remote control operation is allowed.

9. The system according to any one of claims 1 to 7, characterized in that, The control unit directly controls the operation of the electric chassis vehicle and the electric grounding switch, specifically including: Remote control function: The control unit establishes a communication connection with the remote host computer through a communication interface. The remote host computer sends operation instructions to the control unit. After receiving the operation instructions, the control unit first sends the operation instructions to the software anti-misoperation logic module for interlocking condition verification, and then sends the verified operation instructions to the motor protection module for protection condition verification. When both the interlocking conditions and protection conditions are met, the control unit drives the electric chassis vehicle or electric grounding switch to perform the corresponding operation. Manual / automatic operation switching and locking function: The control unit is equipped with an operation mode selection switch, which includes a manual mode position and an automatic mode position. The control unit determines the current operation mode according to the current position of the operation mode selection switch. Operation results are sent to the sequential control host for verification: After the control unit drives the electric chassis vehicle or electric grounding switch to complete one operation, the control unit executes the following verification and upload process: The control unit collects the actual position status signals of the electric chassis vehicle or the electric grounding switch. The actual position status signals include one or more of the following: rocking in to position signal, rocking out to position signal, grounding switch closed signal, and grounding switch open signal. The control unit compares the actual position status signal with the target position status in the operation command to generate operation result verification data. The operation result verification data includes one or more of the following: whether the operation was successful, the actual position reached, and the operation time. The control unit sends the operation result verification data to the sequential control host through the communication interface; Step 4: After receiving the operation result verification data, the sequential control host compares the operation result verification data with the operation ticket pre-stored in the sequential control host. If the comparison is consistent, the sequential control host sends a verification pass confirmation signal to the control unit. The control unit records this operation as a successful operation and releases the relevant lock. If the comparison is inconsistent, the sequential control host sends a verification abnormality alarm signal to the control unit. The control unit executes abnormal handling actions.

10. An intelligent switchgear operation control method, characterized in that, This method, applied to an intelligent switchgear operation control system as described in any one of claims 1 to 9, includes the following steps: S1: The control unit receives the operation command and determines the type of the operation command. When the operation command is a circuit breaker operation command, the control unit controls the circuit breaker to open or close through the protection device operation circuit. When the operation command is an electric chassis vehicle or electric grounding switch operation command, the control unit directly drives the electric chassis vehicle or electric grounding switch to perform the corresponding operation. S2: The control unit establishes bidirectional communication with the sequential control host, and receives operation commands from the sequential control host. The operation commands include one of the following: single task single command, combined task single command, and combined task combined command, and execute single control operation, sequential control operation, or combined control operation. S3: During the motor startup process of the electric chassis vehicle or electric grounding switch, the control unit controls the IGBT tube to switch on and off through the high-frequency square wave of PWM1 to achieve soft start of the motor and limit the motor starting current to within 2 to 3 times the rated current. S4: Real-time acquisition of motor operating current, recording and storing the operating current, calculating the peak value, effective value and waveform characteristics of motor current based on the recorded data, and analyzing whether the motor operation process is normal. S5: Perform software error prevention logic verification. When any interlocking condition is not met, the control unit immediately locks the current operation, prohibits the output of drive signals, and sends lockout alarm information to the sequential control host and the local operation panel at the same time. S6: After the operation is completed, the operation result verification data is sent to the sequential control host. The sequential control host compares and verifies the operation result verification data with the pre-stored operation ticket.

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