Control method and system for high-speed wire finishing motor drive assembly without fuse technology

Abstract

The application discloses a kind of high line finish rolling motor drive assembly without fuse control method and system of technology in the technical field of steel production, no fuse control and main circuit breaker fast-break control unit is innovatively designed by no fuse and fast-break control, realizes the optimal control to no fuse matching;Matching coil safety combination and two-side current monitoring unit are innovatively designed by two-side current monitoring, realizes process quantization and accurate control to no fuse technology;Fault intelligent timing and leakage reactance intelligent current-limiting control unit is innovatively designed by leakage reactance intelligent current-limiting, realizes end flow accurate quantization control to no fuse technology;Sectional time thermal effect and intelligent response step sequence unit are innovatively designed by thermal effect intelligent response, realizes the optimal control to high line finish rolling motor drive assembly without fuse technology of technology.

Description

Technical Field

[0001] This invention relates to the technical field of steel production, and in particular to a control method and system for a fuse-free technology for a high-speed wire rod mill motor drive assembly. Background Technology

[0002] The finishing mill motor in a steel rolling mill's double-high-speed production line is crucial. Its transmission system directly affects the motor's long-term safe and stable operation. Furthermore, the operation and stability of the finishing mill transmission system itself directly impact the fault-free, safe, and stable operation of the overall finishing mill transmission system. However, existing technology has significant shortcomings and drawbacks. Current finishing mill transmission systems and components primarily rely on fuses and fusible wires for short-circuit or overcurrent protection. Because the finishing mill motor has a very high power output (6000KW), and the overall transmission torque and load current are also very large, the entire finishing mill transmission system directly drives a speed-increasing system, 10 roll box systems, and 10 cone box systems. Therefore, in actual production rolling processes… High currents are particularly prone to occur, and short-circuit high currents frequently occur throughout the entire transmission assembly process. Moreover, existing fuses and fusible wires exhibit time and magnitude lags, which leads to the amplification and prolongation of damage to the finishing mill motor and the finishing mill integrated transmission system caused by overload high currents and short-circuit overcurrents. Such damage is extremely severe, irreversible, and requires a very long processing time, resulting in very high equipment costs. Therefore, existing technology is incompatible with the actual operation of high-speed wire rod finishing mill motors and the finishing mill integrated transmission system, failing to promptly and quickly cut off faults, thus damaging the equipment and causing production interruptions and reduced output. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the invention, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] To address the aforementioned technical problems, the present invention aims to provide a control method for a high-speed wire rod mill motor drive assembly without fuses, specifically comprising the following steps:

[0005] Step S1: Design a fuse-free control component and control module. The precision rolling motor is designed to be fuse-free. In case of failure, the overcurrent limit is embedded in the transmission control component.

[0006] Step S2: Design the main circuit breaker instantaneous trip control module to ensure that the main circuit breaker can be instantaneously tripped within 80 milliseconds. The main circuit breaker is controlled by the drive control component.

[0007] Step S3: Design matching coil and safety combination control module. Each circuit breaker is equipped with a disconnection trip and undervoltage trip coil. The circuit breaker is operated through the backup safety combination unit.

[0008] Step S4: Design current monitoring modules for the input side and motor side to monitor the current on the input side and motor side. If there is an abnormal rate of rise or overcurrent, the controller will immediately switch the rectifier on the power supply side to inverter mode.

[0009] Step S5: Design a fuse-free intelligent timing control module. If a fault occurs during braking, i.e. when the motor side is operating in rectification mode and the grid side is operating in inverter mode, the frequency converters on both motor sides will immediately switch to inverter mode, and the DC current will be suppressed.

[0010] Step S6: Design a leakage reactance intelligent current limiting control module. When a short circuit occurs in the system, the main circuit breaker will immediately disconnect, and the magnitude of the short circuit current in the incoming line will be limited by the leakage reactance of the incoming transformer and the motor.

[0011] Step S7: Design a segmented time and thermal effect semiconductor control module. The circuit breaker will disconnect within a sufficient time to prevent further damage. The thermal effect semiconductor enables the thyristor to still be able to turn off after a short circuit current is generated.

[0012] Step S8: Design an intelligent response sequence connection and control module. According to the short-circuit sequence, the transmission system uses a fuse-free technology to deal with various accidents and protect the transmission system itself so that it can be shut down in time.

[0013] Optionally, the design of the finishing mill motor without fuses means that fuses and fuse wires are not used as high current protection in the entire finishing mill integrated transmission system; the fault situation means that the operation of related mechanical equipment on site is abnormal, resulting in high current or the main circuit is short-circuited, resulting in high current; the overcurrent limit is embedded design in the transmission control component, which means that the current protection is fast and efficient through systematic embedding inside the transmission component.

[0014] Optionally, the main circuit breaker refers to a high-voltage disconnecting circuit breaker located in the high-voltage chamber, used to disconnect the connection between the finishing mill integrated transmission system and the incoming line assembly; the quick-break control refers to the system's ability to quickly disconnect the main circuit when it receives an abnormal alarm or abnormal signal; within 80 milliseconds refers to the time limit that can meet the internal connection requirements of the system and will not cause damage to the equipment.

[0015] Optionally, the matching coil refers to a coil assembly designed based on the functional matching between the high-voltage circuit breaker and the finishing mill motor and the finishing mill integrated transmission system; the disconnection tripping refers to the intelligent tripping of the corresponding high-voltage circuit breaker in the event of a disconnection; the undervoltage tripping coil refers to the intelligent tripping of the high-voltage circuit breaker when the voltage drops, thereby avoiding related safety risks.

[0016] Optionally, the input side is the power input side of the system, which is used to introduce power; the motor side refers to the motor power input side of the system; the current on the input side and the motor side are a direct reflection of the operating status of the precision rolling motor integrated transmission system; abnormal rise rate or overcurrent is mainly detected by the actual value detection system.

[0017] Optionally, the intelligent timing control module for fuse-free faults is used to precisely quantify and connect the various small links in the fault process, thereby achieving precise quantitative matching; immediately switching to inverter state refers to performing reverse closed-loop correction control based on the fault phenomenon.

[0018] Optionally, the leakage reactance intelligent current limiting refers to current control through the characteristic attributes of the leakage reactance, thereby realizing intervention and control of the current change curve; when the system is short-circuited, it refers to the large current under the fault state of the system; the leakage reactance of the incoming transformer and motor refers to the characteristic attributes of the equipment itself and the parameter variables that can be matched with the trend.

[0019] Optionally, the segmented time refers to the segmented quantization and control designed based on the entire overcurrent fault process; thermal effect semiconductor control is based on the thermal effect characteristics to design fault process quantization identification and fast closed-loop control; the thyristor still has the ability to turn off refers to the thyristor being able to turn off under fault conditions by optimizing control and timing response.

[0020] Optionally, the intelligent response sequence connection refers to the efficient connection and quantitative connection between segmented intelligent fault responses; the short-circuit sequence refers to the excessive quantitative decomposition based on short-circuit faults, which can then achieve precise quantitative optimal timing control; the transmission system itself can shut down in time, which means that the system has sufficient margin to trigger and guarantee shutdown in the fault state.

[0021] It also includes a control system for the fuse-free technology of the high-speed wire rod mill motor drive assembly, the control system of which includes:

[0022] Fuse-free control and main circuit breaker instantaneous trip control unit, including

[0023] A fuse-free control assembly and control module are designed to withstand overcurrent in case of a fault; the overcurrent limit is embedded in the drive control assembly.

[0024] The main circuit breaker instantaneous trip control module is used to ensure that the main circuit breaker can be instantaneously tripped within 80 milliseconds. The main circuit breaker is controlled by the drive control component.

[0025] Matching coil safety assembly and two-sided current monitoring units, including

[0026] Matching coil and safety combination control module, used to equip each circuit breaker with a disconnection trip and undervoltage trip coil, the circuit breaker is operated through a backup safety combination unit;

[0027] The input side and motor side current monitoring module is used to monitor the current on the input side and motor side. If there is an abnormal rate of rise or overcurrent, the controller will immediately switch the rectifier on the power supply side to inverter mode.

[0028] Fault-based intelligent timing and leakage reactance intelligent current limiting control unit, including

[0029] The intelligent timing control module for fuse-free faults is used to prevent faults during braking, i.e., when the motor side is operating in rectification mode and the grid side is operating in inverter mode. The frequency converters on both motor sides immediately switch to inverter mode, and the DC current is suppressed.

[0030] The leakage reactance intelligent current limiting control module is used to immediately disconnect the main circuit circuit breaker when a short circuit occurs in the system, and to limit the magnitude of the short circuit current of the incoming line through the leakage reactance of the incoming line transformer and the motor.

[0031] Segmented time thermal effect and intelligent response sequence unit, including

[0032] The segmented time and thermal effect semiconductor control module is used to ensure that the circuit breaker disconnects within a sufficient time to prevent further damage. The thermal effect semiconductor enables the thyristor to still be able to turn off after a short-circuit current occurs.

[0033] The intelligent response sequence connection and control module is used to handle various accidents in the transmission system according to the short-circuit sequence using fuse-free technology, and protects the transmission system itself so that it can be shut down in time.

[0034] In summary, the present invention has at least one of the following beneficial effects:

[0035] 1. By designing the precision rolling mill motor with a fuse-free design, the overcurrent limit in case of a fault is embedded in the drive control assembly. Innovative design ensures the main circuit breaker can trip within 80 milliseconds. The main circuit breaker is controlled by the drive control center. Each circuit breaker must be equipped with a disconnection trip and undervoltage release coil, and the circuit breaker operates through a backup safety combination unit. The current on both the incoming line and the motor side is constantly monitored. If there is an abnormal rate of increase or overcurrent, the controller will immediately switch the rectifier on the power supply side to inverter mode. In the event of a fault during braking (i.e., when the motor side is operating in rectification mode and the grid side is operating in inverter mode), the frequency converters on both motor sides immediately switch to inverter mode, suppressing the DC current. The main circuit breaker trips immediately when a circuit occurs in the system. The magnitude of the incoming short-circuit current is limited by the leakage reactance of the incoming transformer and the motor. This enables intelligent and rapid cutting off and intelligent current reduction of the finishing mill motor and the finishing mill integrated transmission system under overload, high current and short circuit overcurrent conditions. This ensures that the equipment is not damaged and production is not affected under overload, high current and short circuit overcurrent conditions, thereby contributing to the long-term safe and stable operation of the high-speed wire rod finishing mill equipment and improving the output and daily operating rate of the high-speed wire rod.

[0036] 2. The fuse-free control and main circuit breaker instantaneous trip control unit achieves optimal control of fuse-free matching through innovative design of fuse-free and instantaneous trip control; the matching coil safety combination and two-sided current monitoring unit achieves process quantification and precise control of fuse-free technology through innovative design of two-sided current monitoring; the fault intelligent timing and leakage reactance intelligent current limiting control unit achieves precise quantitative control of end current reduction of fuse-free technology through innovative design of leakage reactance intelligent current limiting; and the segmented time thermal effect and intelligent response sequence unit achieves optimal control of fuse-free technology for high-speed wire rod mill motor drive components through innovative design of intelligent response to thermal effects. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a flowchart of the control method for the fuse-free technology of the high-speed wire rod mill motor drive assembly of the present invention;

[0039] Figure 2 This is a block diagram illustrating the control system principle of the fuse-free technology for the high-speed wire rod mill motor drive assembly of the present invention. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1-2 The present invention will be described in further detail below.

[0041] Example 1

[0042] Reference Figure 1 This invention discloses a control method for a fuse-free technology in the motor drive assembly of a high-speed wire rod mill, specifically including the following steps:

[0043] Step S1: Design a fuse-free control component and control module. The precision rolling motor is designed to be fuse-free. In case of failure, the overcurrent limit is embedded in the transmission control component.

[0044] The design of the finishing mill motor without fuses refers to the absence of fuses and fuse wires as high-current protection in the entire finishing mill integrated transmission system; the fault conditions refer to abnormal operation of related mechanical equipment on site, resulting in high current or short circuit in the main circuit, resulting in high current; the overcurrent limit is the embedded design in the transmission control component, which means that the current protection is achieved quickly and efficiently through systematic embedding within the transmission component.

[0045] Step S2: Design the main circuit breaker instantaneous trip control module to ensure that the main circuit breaker can be instantaneously tripped within 80 milliseconds. The main circuit breaker is controlled by the drive control component.

[0046] The main circuit breaker refers to the high-voltage disconnecting circuit breaker located in the high-voltage chamber, used to disconnect the connection between the finishing mill integrated transmission system and the incoming line assembly; the instantaneous disconnection control refers to the system's ability to quickly disconnect the main circuit when it receives an abnormal alarm or abnormal signal; within 80 milliseconds refers to the time limit that can meet the internal connection requirements of the system and will not cause damage to the equipment.

[0047] Step S3: Design matching coil and safety combination control module. Each circuit breaker is equipped with a disconnection trip and undervoltage trip coil. The circuit breaker is operated through the backup safety combination unit.

[0048] The matching coil refers to a coil assembly designed based on the functional matching between the high-voltage circuit breaker and the finishing mill motor and the finishing mill integrated transmission system; the disconnection tripping refers to the intelligent tripping of the corresponding high-voltage circuit breaker in the event of a disconnection; the undervoltage tripping coil refers to the intelligent tripping of the high-voltage circuit breaker when the voltage drops, thereby avoiding related safety risks.

[0049] Step S4: Design current monitoring modules for the input side and motor side to monitor the current on the input side and motor side. If there is an abnormal rate of rise or overcurrent, the controller will immediately switch the rectifier on the power supply side to inverter mode.

[0050] The input side is the power input side of the system, which is used to introduce power; the motor side refers to the power input side of the system's motor; the current on the input side and the motor side are a direct reflection of the operating status of the precision rolling motor integrated transmission system; abnormal rise rate or overcurrent is mainly detected by the actual value detection system.

[0051] Step S5: Design a fuse-free intelligent timing control module. If a fault occurs during braking, i.e. when the motor side is operating in rectification mode and the grid side is operating in inverter mode, the frequency converters on both motor sides will immediately switch to inverter mode, and the DC current will be suppressed.

[0052] The intelligent timing control module for faults without fuses is used to precisely quantify and connect the various small links in the fault process, thereby achieving precise quantitative matching; immediately switching to inverter mode refers to performing closed-loop correction control in the opposite direction based on the fault phenomenon.

[0053] Step S6: Design a leakage reactance intelligent current limiting control module. When a short circuit occurs in the system, the main circuit breaker will immediately disconnect, and the magnitude of the short circuit current in the incoming line will be limited by the leakage reactance of the incoming transformer and the motor.

[0054] The aforementioned intelligent current limiting of leakage reactance refers to current control through the characteristic attributes of leakage reactance, thereby realizing intervention and control of the current change curve; when the system is short-circuited, it refers to the large current under the fault state of the system; the leakage reactance of the incoming transformer and motor refers to the characteristic attributes of the equipment itself and the parameter variables that can be matched with the trend.

[0055] Step S7: Design a segmented time and thermal effect semiconductor control module. The circuit breaker will disconnect within a sufficient time to prevent further damage. The thermal effect semiconductor enables the thyristor to still be able to turn off after a short circuit current is generated.

[0056] The segmented time refers to the segmented quantization and control designed based on the entire overcurrent fault process. Thermal effect semiconductor control is based on the thermal effect characteristics to design fault process quantization identification and fast closed-loop control. The ability of the thyristor to still turn off means that under fault conditions, the thyristor can be turned off by optimizing control and timing response.

[0057] Step S8: Design an intelligent response sequence connection and control module. According to the short-circuit sequence, the transmission system uses a fuse-free technology to deal with various accidents and protect the transmission system itself so that it can be shut down in time.

[0058] The intelligent response sequence refers to the efficient connection and quantitative connection between segmented intelligent fault responses. The short-circuit sequence refers to the excessive quantitative decomposition based on short-circuit faults, which can then achieve precise quantitative optimal timing control. The transmission system itself can shut down in time, which means that the system has enough margin to trigger and ensure shutdown in the fault state.

[0059] Example 2

[0060] Reference Figure 2 Based on the same concept as Embodiment 1 above, this system also includes a control method for a fuse-free technology for the high-speed wire rod mill motor drive assembly.

[0061] It also includes a control system for the fuse-free technology of the high-speed wire rod mill motor drive assembly, the control system of which includes:

[0062] The fuseless control and main circuit breaker instantaneous trip control unit features functions such as fuseless control high load current identification, fuseless control short circuit current identification, fuseless control integrated components and connections, main circuit breaker instantaneous trip control coil matching and control, main circuit breaker instantaneous trip control signal transmission control, and main circuit breaker instantaneous trip control closed-loop feedback and confirmation. Through innovative design of fuseless and instantaneous trip control, the fuseless control and main circuit breaker instantaneous trip control unit achieves optimal control for fuseless matching; specifically including...

[0063] A fuse-free control assembly and control module are designed to withstand overcurrent in case of a fault; the overcurrent limit is embedded in the drive control assembly.

[0064] The main circuit breaker instantaneous trip control module is used to ensure that the main circuit breaker can be instantaneously tripped within 80 milliseconds. The main circuit breaker is controlled by the drive control component.

[0065] The matching coil safety assembly and dual-side current monitoring unit features functions such as intermediate transition connection of the matching coil safety assembly, symmetrical signal transmission and control of the matching coil safety assembly, drive execution of the matching coil safety assembly, control of the dual-side current monitoring sensor components, acquisition and transmission of dual-side current monitoring signals, and comparative analysis of dual-side current monitoring. Through innovative design of dual-side current monitoring, the matching coil safety assembly and dual-side current monitoring unit achieves quantified and precise control of the fuse-free technology process; specifically including...

[0066] Matching coil and safety combination control module, used to equip each circuit breaker with a disconnection trip and undervoltage trip coil, the circuit breaker is operated through a backup safety combination unit;

[0067] The input side and motor side current monitoring module is used to monitor the current on the input side and motor side. If there is an abnormal rate of rise or overcurrent, the controller will immediately switch the rectifier on the power supply side to inverter mode.

[0068] The fault-intelligent timing and leakage reactance intelligent current limiting control unit features fault-intelligent timing logic combination control, fault-intelligent timing drive connection and quantization control, fault-intelligent timing execution link combination control, leakage reactance intelligent current limiting control feature attribute matching, leakage reactance intelligent current limiting control intelligent current control, and leakage reactance intelligent current limiting control trend and curve control. Through innovative design of leakage reactance intelligent current limiting, the fault-intelligent timing and leakage reactance intelligent current limiting control unit achieves precise quantization control of the end-point current reduction in fuse-free technology; specifically including...

[0069] The intelligent timing control module for fuse-free faults is used to prevent faults during braking, i.e., when the motor side is operating in rectification mode and the grid side is operating in inverter mode. The frequency converters on both motor sides immediately switch to inverter mode, and the DC current is suppressed.

[0070] The leakage reactance intelligent current limiting control module is used to immediately disconnect the main circuit circuit breaker when a short circuit occurs in the system, and to limit the magnitude of the short circuit current of the incoming line through the leakage reactance of the incoming line transformer and the motor.

[0071] The piecewise thermal effect and intelligent response sequence unit features piecewise thermal effect segmented drive and attribute connection control, piecewise thermal effect curve interval matching control, piecewise thermal effect superposition control, intelligent response sequence signal recognition control, intelligent response sequence execution drive control, and intelligent response sequence link connection control. Through innovative design of intelligent response to thermal effects, the piecewise thermal effect and intelligent response sequence unit achieves optimized control of the fuse-free technology for high-speed wire rod mill motor drive components; specifically including...

[0072] The segmented time and thermal effect semiconductor control module is used to ensure that the circuit breaker disconnects within a sufficient time to prevent further damage. The thermal effect semiconductor enables the thyristor to still be able to turn off after a short-circuit current occurs.

[0073] The intelligent response sequence connection and control module is used to handle various accidents in the transmission system according to the short-circuit sequence using fuse-free technology, and protects the transmission system itself so that it can be shut down in time.

[0074] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A control method for a high-speed wire rod mill motor drive assembly without fuses, characterized in that: Specifically, the following steps are included: Step S1: Design a fuse-free control component and control module. The precision rolling motor is designed to be fuse-free. In case of failure, the overcurrent limit is embedded in the transmission control component. Step S2: Design the main circuit breaker instantaneous trip control module to ensure that the main circuit breaker can be instantaneously tripped within 80 milliseconds. The main circuit breaker is controlled by the drive control component. Step S3: Design matching coil and safety combination control module. Each circuit breaker is equipped with a disconnection trip and undervoltage trip coil. The circuit breaker is operated through the backup safety combination unit. Step S4: Design current monitoring modules for the input side and motor side to monitor the current on the input side and motor side. If there is an abnormal rate of rise or overcurrent, the controller will immediately switch the rectifier on the power supply side to inverter mode. Step S5: Design a fuse-free intelligent timing control module. If a fault occurs during braking, i.e. when the motor side is operating in rectification mode and the grid side is operating in inverter mode, the frequency converters on both motor sides will immediately switch to inverter mode, and the DC current will be suppressed. Step S6: Design a leakage reactance intelligent current limiting control module. When a short circuit occurs in the system, the main circuit breaker will immediately disconnect, and the magnitude of the short circuit current in the incoming line will be limited by the leakage reactance of the incoming transformer and the motor. Step S7: Design a segmented time and thermal effect semiconductor control module. The circuit breaker will disconnect within a sufficient time to prevent further damage. The thermal effect semiconductor enables the thyristor to still be able to turn off after a short circuit current is generated. Step S8: Design an intelligent response sequence connection and control module. According to the short-circuit sequence, the transmission system uses a fuse-free technology to deal with various accidents and protect the transmission system itself so that it can be shut down in time.

2. The control method for the high-speed wire rod mill motor drive assembly without fuses according to claim 1, characterized in that: The design of the finishing mill motor without fuses refers to the absence of fuses and fuse wires as high-current protection in the entire finishing mill integrated transmission system; the fault conditions refer to abnormal operation of related mechanical equipment on site, resulting in high current or short circuit in the main circuit, resulting in high current; the overcurrent limit is the embedded design in the transmission control component, which means that the current protection is achieved quickly and efficiently through systematic embedding within the transmission component.

3. The control method for the high-speed wire rod mill motor drive assembly without fuses according to claim 1, characterized in that: The main circuit breaker refers to the high-voltage disconnecting circuit breaker located in the high-voltage chamber, used to disconnect the connection between the finishing mill integrated transmission system and the incoming line assembly; the instantaneous disconnection control refers to the system's ability to quickly disconnect the main circuit when it receives an abnormal alarm or abnormal signal; within 80 milliseconds refers to the time limit that can meet the internal connection requirements of the system and will not cause damage to the equipment.

4. The control method for the high-speed wire rod mill motor drive assembly without fuses according to claim 1, characterized in that: The matching coil refers to a coil assembly designed based on the functional matching between the high-voltage circuit breaker and the finishing mill motor and the finishing mill integrated transmission system; the disconnection tripping refers to the intelligent tripping of the corresponding high-voltage circuit breaker in the event of a disconnection; the undervoltage tripping coil refers to the intelligent tripping of the high-voltage circuit breaker when the voltage drops, thereby avoiding related safety risks.

5. The control method for the high-speed wire rod mill motor drive assembly without fuses according to claim 1, characterized in that: The input side is the power input side of the system, which is used to introduce power; the motor side refers to the power input side of the system's motor; the current on the input side and the motor side are a direct reflection of the operating status of the precision rolling motor integrated transmission system; abnormal rise rate or overcurrent is mainly detected by the actual value detection system.

6. The control method for the high-speed wire rod mill motor drive assembly without fuses according to claim 1, characterized in that: The intelligent timing control module for faults without fuses is used to precisely quantify and connect the various small links in the fault process, thereby achieving precise quantitative matching; immediately switching to inverter mode refers to performing closed-loop correction control in the opposite direction based on the fault phenomenon.

7. The control method for the high-speed wire rod mill motor drive assembly without fuses according to claim 1, characterized in that: The aforementioned intelligent current limiting of leakage reactance refers to current control through the characteristic attributes of leakage reactance, thereby realizing intervention and control of the current change curve; when the system is short-circuited, it refers to the large current under the fault state of the system; the leakage reactance of the incoming transformer and motor refers to the characteristic attributes of the equipment itself and the parameter variables that can be matched with the trend.

8. The control method for the high-speed wire rod mill motor drive assembly without fuses according to claim 1, characterized in that: The segmented time refers to the segmented quantization and control designed based on the entire overcurrent fault process. Thermal effect semiconductor control is based on the thermal effect characteristics to design fault process quantization identification and fast closed-loop control. The ability of the thyristor to still turn off means that under fault conditions, the thyristor can be turned off by optimizing control and timing response.

9. The control method for the high-speed wire rod mill motor drive assembly without fuses according to claim 1, characterized in that: The intelligent response sequence refers to the efficient connection and quantitative connection between segmented intelligent fault responses. The short-circuit sequence refers to the excessive quantitative decomposition based on short-circuit faults, which can then achieve precise quantitative optimal timing control. The transmission system itself can shut down in time, which means that the system has enough margin to trigger and ensure shutdown in the fault state.

10. The control method for the high-speed wire rod mill motor drive assembly without fuses according to any one of claims 1-9, characterized in that: It also includes a control system for the fuse-free technology of the high-speed wire rod mill motor drive assembly, the control system of which includes: Fuse-free control and main circuit breaker instantaneous trip control unit, including The fuse-free control assembly and control module are designed to limit overcurrent in case of failure; the overcurrent limit is embedded in the drive control assembly. The main circuit breaker instantaneous trip control module is used to ensure that the main circuit breaker can be instantaneously tripped within 80 milliseconds. The main circuit breaker is controlled by the drive control component. Matching coil safety assembly and two-sided current monitoring units, including Matching coil and safety combination control module, used to equip each circuit breaker with a disconnection trip and undervoltage trip coil, the circuit breaker is operated through a backup safety combination unit; The input side and motor side current monitoring module is used to monitor the current on the input side and motor side. If there is an abnormal rate of rise or overcurrent, the controller will immediately switch the rectifier on the power supply side to inverter mode. Fault-based intelligent timing and leakage reactance intelligent current limiting control unit, including The intelligent timing control module for fuse-free faults is used to immediately switch the inverters on both motor sides to inverter mode and suppress DC current in the event of a fault during braking, i.e., when the motor side is operating in rectification mode and the grid side is operating in inverter mode. The leakage reactance intelligent current limiting control module is used to immediately disconnect the main circuit circuit breaker when a short circuit occurs in the system, and to limit the magnitude of the short circuit current of the incoming line through the leakage reactance of the incoming line transformer and the motor. Segmented time thermal effect and intelligent response sequence unit, including The segmented time and thermal effect semiconductor control module is used to ensure that the circuit breaker disconnects within a sufficient time to prevent further damage. The thermal effect semiconductor enables the thyristor to still be able to turn off after a short-circuit current occurs. The intelligent response sequence connection and control module is used to handle various accidents in the transmission system according to the short-circuit sequence using fuse-free technology, and protects the transmission system itself so that it can be shut down in time.

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