Novel energy-saving power distribution control method for wire drawing machine

Abstract

The invention provides a novel energy-saving power distribution control method for a wire drawing machine, belongs to the field of auxiliary power distribution of the wire drawing machine, and solves the problems of unstable power utilization, high energy consumption and the like during processing of an existing wire drawing machine. Comprising the following steps: energy-saving design of wire drawing machines: cascade energy-saving design of a plurality of wire drawing machine production lines and modular energy-saving design of the wire drawing machines; configuring the energy storage capacity of the wire drawing machine; the energy efficiency control unit monitors and analyzes working data of the energy storage battery; and energy efficiency economic control and safety protection are carried out at the same time. The energy storage capacity configuration of the wire drawing machine can be provided according to the electrical characteristics of the wire drawing machine, energy efficiency economic control and safety protection are carried out, economic charging and discharging logic is ensured on the premise of safety, and the characteristics of stable and reliable power utilization, green energy recovery and lowest power utilization cost are ensured under the condition of normal production of the wire drawing machine; and the energy efficiency control unit controls the energy storage battery to discharge to the alternating current bus to supply power to other loads except the wire drawing machine, so that the interest arbitrage function is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of auxiliary power distribution for wire drawing machines and relates to a novel energy-saving power distribution control method for wire drawing machines. Background Art

[0002] The wire drawing machine mainly uses the ductility of materials such as metal or plastic to apply tension to the material through the wire drawing die, so that the material gradually becomes thinner under the action of the die, and finally forms the required filaments. At present, there are two main types of glass fiber drawing machines, direct yarn drawing machines and cake yarn drawing machines.

[0003] The general components of the wire drawing machine are the machine body, control box, reversing disk, winding head A (operating machine head), winding head B (standby head, spare machine head, A and B alternate and serve as spare for each other), and wire arranger (to make the yarn swing left and right and wind around the machine head in a certain pattern). A glass fiber production line has about 200 wire drawing machines, which can be all direct yarn drawing machines or all cake yarn drawing machines, and there are also situations where both types are used at the same time.

[0004] However, the power consumption of multiple wire drawing machines is unstable when in use, and the local electricity price cannot fully match the load demand of the wire drawing machines, resulting in high power consumption, high power cost and damaged production benefits; the wire drawing machines have a large demand for braking energy recovery in the production process, and the current main solution to energy recovery is to use braking resistors, main motors and other methods to generate natural heat and consume, resulting in a large waste of energy.

[0005] How to develop energy-efficient and economical control methods and safety protection methods based on the electricity consumption characteristics of wire drawing machines, ensure stable and reliable electricity consumption, green energy recovery and lowest electricity cost under normal production conditions of wire drawing machines, and promote the rapid transformation of wire drawing machine production towards new energy is an urgent problem to be solved.

[0006] Based on this, we propose a new energy-saving power distribution control method for wire drawing machines. Summary of the invention

[0007] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose a new energy-saving power distribution control method for a wire drawing machine. The technical problem to be solved by the invention is: how to realize the configuration of the energy storage capacity, energy efficiency and economic control and safety protection of the wire drawing machine according to the electrical characteristics of the wire drawing machine, ensure stable and reliable electricity use, green energy recovery and the lowest electricity cost, and realize arbitrage.

[0008] The purpose of the present invention can be achieved by the following technical solutions: A new energy-saving power distribution control method for a wire drawing machine comprises the following steps: Step 1, energy-saving design of wire drawing machine: 1.1, cascade energy-saving design of multiple wire drawing machine production lines, 1 to M wire drawing machine mobile units are cascaded, where m is an integer greater than or equal to 1, and each of them is equipped with a set of slow-start unit, energy storage battery, conversion device and energy efficiency control unit; 1.2, modular energy-saving design of wire drawing machine, each wire drawing machine is equipped with a set of wire drawing machine mobile unit, slow-start unit, energy storage battery, conversion device and energy efficiency control unit; Step 2: Energy storage capacity configuration of wire drawing machine: 2.1. The power and capacity specifications of the energy storage battery are configured according to condition 1. Condition 1 is the total motor power P of the wire drawing machine. sum = =P 储能电池 And the total motor current I sum = =I 储能电池 , where m is the number of cascaded motor units of the wire drawing machine or the number of wire drawing machines, n is the number of corresponding conversion control modules in each wire drawing machine, m and n are both integers greater than or equal to 1, j is any value from 1 to m, and i is any value from 1 to n; 2.2, the power and capacity specifications of the energy storage battery are configured according to condition 2, and condition 2 is that the minimum voltage between D+ and D- at both ends of the conversion control module of the wire drawing machine is U min And the maximum value is U max The minimum voltage between B+ and B- of the energy storage battery is and the maximum value is , =U max + , =U min + ,in and 2.3. Configure the energy efficiency control unit, which collects the status of the energy storage battery in real time, and controls the corresponding electrical components to complete the charging and discharging of the energy storage battery according to the status of the energy storage battery. It also supports receiving remote control commands and completes the charging and discharging actions and protection management in combination with the status of the energy storage battery. Step 3: The energy efficiency control unit monitors and analyzes the working data of the energy storage battery. The voltage between the energy storage battery B+ and B- is U B The voltage between D+ and D- at both ends of the conversion control module of the wire drawing machine is U D , when the energy efficiency control unit monitors the voltage range of the energy storage battery [U th1 , U th2 ] and the battery temperature range [T th1 , T th2 ], and K1 or K2 is disconnected at this time, the energy efficiency control unit controls K2 to close and synchronously controls the slow-start unit to work until U B =U D * ,in is an integer less than 1, at which time K1 is closed to synchronously control the slow-start unit to stop working; Step four, perform energy efficiency and economic control and safety protection at the same time; when performing energy efficiency and economic control, energy control performs charge and discharge control and arbitrage according to the energy storage battery based on the operating characteristics of the wire drawing machine; when performing safety protection, it plays a role in protecting the energy storage battery, electrical circuits and personal safety.

[0009] The multiple cascade energy-saving design route of the wire drawing machine production line in step one includes several wire drawing machine excitation units, slow-start units, energy storage batteries, conversion devices and energy efficiency control units. The energy storage battery and the conversion device are connected by wires, and the AC bus and the conversion device are connected by wires. The wire drawing machine excitation unit includes a switching control module connected to the AC bus wires and a switching control module connected to the motor wires of the wire drawing machine. The switching control modules are electrically connected, and the wires between the switching control modules are electrically connected to the wires between the energy storage battery and the conversion device. K1 and K2 are respectively provided on the wires therein, and a buffer unit is provided on the positive pole wire. The slow-start unit, the energy storage battery, the conversion device and the switching control module connected to the motor wires of the wire drawing machine are all electrically connected to the energy efficiency control unit, and K1 and K2 are all electrically connected to the energy efficiency control unit. The energy efficiency control unit is electrically connected to the wires between the conversion device and the AC bus, and the connecting wire between the energy efficiency control unit and the motor of the wire drawing machine is a full-barrel signal transmission line.

[0010] The modular energy-saving design route of the wire drawing machine in the step one includes a slow-start unit, an energy storage battery, a conversion device and an energy efficiency control unit, and an exchange control module connected to the motor wires of the wire drawing machine. The exchange control modules are all connected to the wires between the AC busbars, the energy storage battery and the conversion device are connected by wires, the AC busbar and the conversion device are connected by wires, the wires between the exchange control modules are electrically connected to the wires between the energy storage battery and the conversion device, K1 and K2 are respectively provided on the wires there, and a buffer unit is provided on the positive wire, the slow-start unit, the energy storage battery, the conversion device and the exchange control module connected to the motor wires of the wire drawing machine are all electrically connected to the energy efficiency control unit, and K1 and K2 are all electrically connected to the energy efficiency control unit, the energy efficiency control unit is electrically connected to the wires between the conversion device and the AC busbar, and the connecting wires between the energy efficiency control unit and the motor of the wire drawing machine are full-barrel signal transmission lines.

[0011] Steps for energy efficiency and economic control in step 4: 4.1, the energy storage battery automatically discharges in the direction of the motor: when the winding head, wire arrangement reciprocating function, oiling or barrel change lateral movement corresponding to the motor M1~M2n in the wire drawing machine 1~m work, U B >U Dj, j is any value from 1 to m, then the energy storage battery automatically discharges toward the motor; 4.2. The motor that stops by braking discharges to the outside: When the winding head, wire arrangement reciprocating function, oiling or barrel changing transverse movement corresponding to the motors M1~M2n in the wire drawing machine 1~m stops by braking, the motor that stops by braking discharges to the outside; 4.3, the total voltage of the energy storage battery is lower than the battery discharge threshold U 放th Or the lowest cell voltage of the energy storage battery is lower than the cell discharge threshold And at this time in the charging time period, that is, when the energy efficiency control unit monitors that the total voltage of the energy storage battery is lower than the battery discharge threshold U 放th Or the lowest cell voltage of the energy storage battery is lower than the cell discharge threshold At this time, during the charging time period, the energy efficiency control unit controls K1 and K2 to be disconnected, and controls K3 to be closed, and controls the conversion device to charge the energy storage battery until the total voltage of the energy storage battery exceeds the battery charging threshold U 充th Or the highest cell voltage of the energy storage battery exceeds the cell charging threshold , then the energy efficiency control unit controls the conversion device to stop working and disconnects K3, and synchronously controls according to step 3; 4.4, control the energy storage battery to discharge to the AC bus, if it is in the discharge time period, and the power consumed by the motor running during this time period < ,in, is a coefficient less than 1, If there is remaining power in the energy storage battery, the energy efficiency control unit controls the energy storage battery to discharge to the AC bus to supply power to other loads except the wire drawing machine, thereby realizing the arbitrage function.

[0012] The motor that stops by braking in step 4.2 discharges externally in the following situations: 4.2.1 If P 发 >P 耗 , resulting in U B Dj , that is, if the total power P discharged by the motor is 发 >Total power P of the motor being run 耗 , resulting in U B Dj , j is any value from 1 to m, then the motor charges the energy storage battery; 4.2.2. The energy efficiency control unit detects a full-barrel signal: If the energy efficiency control unit detects a full-barrel signal and the energy storage battery cannot be charged at this time, the energy efficiency control unit controls K3 to close and controls the conversion device to discharge to the AC bus for energy recovery and utilization until the full-barrel signal disappears, and then controls K3 to open again to stop discharging to the AC bus; 4.2.3 If P​​发 <P 耗 , that is, if the total power P discharged by the motor is 发 <Total power P of the motor being run 耗 , 4.2.3A, if there is U B Dj , j is any value from 1 to m, and it is not in the charging time period, then K1 is controlled to be disconnected to prevent the conversion control module from charging the energy storage battery; 4.2.3A, if there is U B >U Dj , j is any value from 1 to m, then the energy storage battery automatically discharges toward the motor.

[0013] The operation characteristics of the wire drawing machine for energy efficiency and economic control in step 4 include: a full barrel signal of the wire drawing machine and a full barrel motor braking signal; 1) a full barrel signal of the wire drawing machine: as a pre-braking signal of the wire drawing machine brake motor, to prepare for charging the energy storage battery; 2) a full barrel motor braking signal is a voltage U across the conversion control module of the wire drawing machine. D , at this time, the conditions for instantaneous determination of whether to charge.

[0014] The power flow of the energy-saving design circuit of the wire drawing machine in step 3 and step 4.1 is from the AC bus and the energy storage battery to the motor of the wire drawing machine.

[0015] In the step 4.2.1, the power flow of the wire drawing machine energy-saving design circuit is from the motor of the wire drawing machine to the AC bus and the energy storage battery.

[0016] The full-bore signal in step 4.2.2 is the pressure signal output by the pressure sensor on the winding head reel or is used to identify whether the reel is full based on the full-bore speed characteristics of the wire drawing machine motor. According to the wire drawing machine motor operation curve, t1 is the motor acceleration climbing time, t2 is the stable speed running time, when t>(t1+t2), the winding head corresponding to the motor is full.

[0017] In step 4.2.2, the energy efficiency control unit monitors the full barrel signal and performs advance charging and discharging preparation according to the running time t of the wire drawing machine motor; 1) It is known that the wire drawing machine needs time t3=t1+t2 to fill the barrel and the power consumption is Q0; 2) When the wire drawing machine starts drawing, the energy storage battery power is at Q1. It is expected that the remaining power of the energy storage battery when the wire drawing machine is full is Q2=Q1-Q0; 3) The external discharge amount of the wire drawing machine from full barrel braking to shutdown is Q3, which is the braking energy; ​4) According to the operating energy data set (Q0, Q3, t)k of the wire drawing machine, where k is the length of the time series from the start of the wire drawing machine's operation to the current position. It is predicted that if the rechargeable amount Q4 of the energy storage battery is less than Q3 after time t, the energy efficiency control unit controls the energy storage unit K3 to close and discharge to the power grid during the peak time period before the full bobbin signal of the wire drawing machine occurs. The discharge amount Q5 is Q4 - Q3, preparing the charging energy space for the energy storage battery and simultaneously conducting discharge arbitrage.

[0018] Steps for safety protection in step 4 above: 4A. The total voltage of the energy storage battery is lower than the battery discharge threshold U 放th Or the lowest single - cell voltage of the energy storage battery is lower than the single - cell discharge threshold And it is not in the charging time period at this time. That is, during the operation of the wire drawing machine, the energy efficiency control unit monitors that the total voltage of the energy storage battery is lower than the battery discharge threshold U 放th Or the lowest single - cell voltage of the energy storage battery is lower than the single - cell discharge threshold And it is not in the charging time period at this time, then the energy efficiency control unit controls K1 and K2 to disconnect, playing a protective role for the energy storage battery until it enters the charging time period, and then charging the energy storage battery according to step 6; 4B. The battery temperature of the energy storage battery exceeds the battery temperature range [T th1 , T th2 . That is, during the operation of the wire drawing machine, the energy efficiency control unit monitors that the battery temperature of the energy storage battery exceeds the battery temperature range [T th1 , T th2 . Then the energy efficiency control unit controls K1 and K2 to disconnect, playing a protective role for the energy storage battery until the battery temperature returns to the specified range, and then operating according to step 4.3; 4C. Any of A1~Am exceeds the maximum current operation threshold I th . That is, during the operation of the wire drawing machine, any of A1~Am exceeds the maximum current operation threshold I th . Then the energy efficiency control unit controls K1 and K2 to disconnect, playing a protective role for the electrical circuit until the main current of the wire drawing machine returns to normal, and then operating according to step 3; 4D. When any one of the 1~M wire drawing machines needs to be repaired, the energy efficiency control unit controls K1 and K2 to disconnect, ensuring that the electrical circuit is de - energized, playing a role in personal safety protection until the repair is completed, and then operating according to step 3.

[0019] Compared with the prior art, the new energy - saving power distribution control method of this wire drawing machine has the following advantages: According to the electrical characteristics of the wire drawing machine, the energy storage capacity configuration of the wire drawing machine is proposed, and energy efficiency and economic control and safety protection are carried out according to the electricity consumption characteristics of the wire drawing machine, to ensure the economic charging and discharging logic under the premise of safety, to ensure stable and reliable electricity consumption, green energy recovery and the lowest electricity cost under normal production of the wire drawing machine, and to promote the rapid transformation of the wire drawing machine production to the direction of new energy; energy recovery control logic and economic charging and discharging logic, the energy efficiency control unit controls the energy storage battery to discharge to the AC bus, to supply power to other loads except the wire drawing machine, and realize the arbitrage function. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic flow chart of the method of the present invention.

[0021] Figure 2 It is a schematic flow chart of step one in the present invention.

[0022] Figure 3 It is a schematic flow diagram of step 2 in the present invention.

[0023] Figure 4 It is a schematic flow diagram of step three in the present invention.

[0024] Figure 5 It is a flow chart of energy efficiency and economic control in step 4 of the present invention.

[0025] Figure 6 It is a schematic diagram of the process of step 4.2 in the present invention.

[0026] Figure 7 It is a schematic diagram of the safety protection process in step 4 of the present invention.

[0027] Figure 8 It is a schematic diagram of the route design of Example 1 of the present invention.

[0028] Fig. 9 It is a schematic diagram of the route design of Example 2 of the present invention.

[0029] Fig.10 It is a schematic diagram of the discharge power flow of the energy storage battery in the present invention.

[0030] Fig.11 It is a schematic diagram of the operation of the motor of the wire drawing machine in the present invention.

[0031] Fig.12 It is a schematic diagram of the power flow of the present invention discharging to the power grid.

[0032] Fig.13 It is a schematic diagram of the charging power flow of the energy storage battery in the present invention. DETAILED DESCRIPTION

[0033] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0034] like Figure 1-Figure 13 As shown, the novel energy-saving power distribution control method for the wire drawing machine includes the following steps: Step 1, energy-saving design of wire drawing machine: 1.1, cascade energy-saving design of multiple wire drawing machine production lines, 1 to M wire drawing machine motor units are cascaded, and each of them is equipped with a set of slow-start unit, energy storage battery, conversion device and energy efficiency control unit; 1.2, modular energy-saving design of wire drawing machine, each wire drawing machine is equipped with a set of wire drawing machine motor unit, slow-start unit, energy storage battery, conversion device and energy efficiency control unit; Step 2: Energy storage capacity configuration of wire drawing machine: 2.1. The power and capacity specifications of the energy storage battery are configured according to condition 1. Condition 1 is the total motor power P of the wire drawing machine. sum = =P 储能电池 And the total motor current I sum = =I 储能电池 , where m is the number of cascaded motor units of the wire drawing machine or the number of wire drawing machines, n is the number of corresponding conversion control modules in each wire drawing machine, m and n are both integers greater than or equal to 1, j is any value from 1 to m, and i is any value from 1 to n; 2.1. The power and capacity specifications of the energy storage battery are configured according to condition 2. Condition 2 is that the minimum voltage between D+ and D- at both ends of the conversion control module of the wire drawing machine is U min And the maximum value is U max The minimum voltage between B+ and B- of the energy storage battery is and the maximum value is , =U max + , =U min + ,in and 2.3. Configure the energy efficiency control unit, which collects the status of the energy storage battery in real time, and controls the corresponding electrical components to complete the charging and discharging of the energy storage battery according to the status of the energy storage battery. It also supports receiving remote control commands and completes the charging and discharging actions and protection management in combination with the status of the energy storage battery. Step 3: The energy efficiency control unit monitors and analyzes the working data of the energy storage battery. The voltage between the energy storage battery B+ and B- is U B The voltage between D+ and D- at both ends of the conversion control module of the wire drawing machine is U D , when the energy efficiency control unit monitors the voltage range of the energy storage battery [U th1 , U th2 ] and the battery temperature range [Tth1 , T th2 ], and K1 or K2 is disconnected at this time, the energy efficiency control unit controls K2 to close and synchronously controls the slow-start unit to work until U B =U D * (in is an integer less than 1), at this time, close K1 to synchronously control the slow-start unit to stop working; Step four, perform energy efficiency and economic control and safety protection at the same time; when performing energy efficiency and economic control, energy control performs charge and discharge control and arbitrage according to the energy storage battery based on the operating characteristics of the wire drawing machine; when performing safety protection, it plays a role in protecting the energy storage battery, electrical circuits and personal safety.

[0035] The multiple cascade energy-saving design route of the wire drawing machine production line in step one includes several wire drawing machine excitation units, slow-start units, energy storage batteries, conversion devices and energy efficiency control units. The energy storage battery and the conversion device are connected by wires, and the AC bus and the conversion device are connected by wires. The wire drawing machine excitation unit includes a switching control module connected to the AC bus wires and a switching control module connected to the motor wires of the wire drawing machine. The switching control modules are electrically connected, and the wires between the switching control modules are electrically connected to the wires between the energy storage battery and the conversion device. K1 and K2 are respectively provided on the wires there, and a buffer unit is provided on the positive pole wire. The slow-start unit, the energy storage battery, the conversion device and the switching control module connected to the motor wires of the wire drawing machine are all electrically connected to the energy efficiency control unit, and K1 and K2 are all electrically connected to the energy efficiency control unit. The energy efficiency control unit is electrically connected to the wires between the conversion device and the AC bus. The connecting wire between the energy efficiency control unit and the motor of the wire drawing machine is a full-barrel signal transmission line, such as Figure 8 shown.

[0036] The modular energy-saving design route of the wire drawing machine in step one includes a slow-start unit, an energy storage battery, a conversion device and an energy efficiency control unit, an exchange control module connected to the motor wires of the wire drawing machine, the exchange control modules are all connected to the wires between the AC bus, the energy storage battery and the conversion device are connected by wires, the AC bus and the conversion device are connected by wires, the wires between the exchange control modules are electrically connected to the wires between the energy storage battery and the conversion device, K1 and K2 are respectively provided on the wires there, and a buffer unit is provided on the positive wire, the slow-start unit, the energy storage battery, the conversion device and the exchange control module connected to the motor wires of the wire drawing machine are all electrically connected to the energy efficiency control unit, and K1 and K2 are all electrically connected to the energy efficiency control unit, the energy efficiency control unit is electrically connected to the wires between the conversion device and the AC bus, and the connecting wires between the energy efficiency control unit and the motor of the wire drawing machine are full-barrel signal transmission lines, such as Fig. 9 shown.

[0037] Steps for energy efficiency and economic control in step 4: 4.1, the energy storage battery automatically discharges in the direction of the motor: when the winding head, wire arrangement reciprocating function, oiling or barrel change lateral movement corresponding to the motor M1~M2n in the wire drawing machine 1~m work, U B >U Dj (j is any value from 1 to m), the energy storage battery automatically discharges toward the motor; 4.2. The motor that stops by braking discharges to the outside: When the winding head, wire arrangement reciprocating function, oiling or barrel changing transverse movement corresponding to the motors M1~M2n in the wire drawing machine 1~m stops by braking, the motor that stops by braking discharges to the outside; 4.3, the total voltage of the energy storage battery is lower than the battery discharge threshold U 放th Or the lowest cell voltage of the energy storage battery is lower than the cell discharge threshold And at this time in the charging time period, that is, when the energy efficiency control unit monitors that the total voltage of the energy storage battery is lower than the battery discharge threshold U 放th Or the lowest cell voltage of the energy storage battery is lower than the cell discharge threshold At this time, during the charging time period, the energy efficiency control unit controls K1 and K2 to be disconnected, and controls K3 to be closed, and controls the conversion device to charge the energy storage battery until the total voltage of the energy storage battery exceeds the battery charging threshold U 充th Or the highest cell voltage of the energy storage battery exceeds the cell charging threshold , then the energy efficiency control unit controls the conversion device to stop working and disconnects K3, and simultaneously performs control according to step 3; 4.4, control the energy storage battery to discharge to the AC bus, if it is in the discharge time period, and the power consumed by the motor running during this time period < ,in, is a coefficient less than 1, If it is the remaining power of the battery, the energy efficiency control unit controls the energy storage battery to discharge to the AC bus to supply power to other loads except the wire drawing machine, thereby realizing the arbitrage function.

[0038] The motor that stops by braking in step 4.2 discharges externally in the following situations: 4.2.1 If P 发 >P 耗 , resulting in U B Dj , that is, if the total power P discharged by the motor is 发 >Total power P of the motor being run 耗 , resulting in U B Dj (j is any value from 1 to m), then the motor charges the energy storage battery; ​​4.2.2. The energy efficiency control unit detects a full-barrel signal: If the energy efficiency control unit detects a full-barrel signal and the energy storage battery cannot be charged at this time, the energy efficiency control unit controls K3 to close and controls the conversion device to discharge to the AC bus for energy recovery and utilization until the full-barrel signal disappears, and then controls K3 to open again to stop discharging to the AC bus; 4.2.3 If P 发 <P 耗 , that is, if the total power P discharged by the motor is 发 <Total power P of the motor being run 耗 , 4.2.3A, if there is U B Dj (j is any value from 1 to m), and it is not in the charging time period, then K1 is controlled to be disconnected to prevent the conversion control module from charging the energy storage battery; 4.2.3B, if there is U B >U Dj (j is any value from 1 to m), then the energy storage battery automatically discharges toward the motor.

[0039] The operation characteristics of the wire drawing machine for energy efficiency and economic control in step 4 include: full barrel signal of the wire drawing machine and full barrel motor braking signal; 1) Full barrel signal of the wire drawing machine: as the pre-braking signal of the wire drawing machine brake motor, to prepare for charging the energy storage battery; 2) Full barrel motor braking signal is the voltage U at both ends of the conversion control module D , at this time, the conditions for instantaneous determination of whether to charge.

[0040] The power flow of the wire drawing machine energy-saving design circuit in step 3 and step 4.1 is from the AC bus and the energy storage battery to the motor of the wire drawing machine, such as Fig.10 shown.

[0041] In step 4.2.1, the power flow of the wire drawing machine energy-saving design circuit is from the wire drawing machine motor to the AC bus and energy storage battery, such as Fig.13 shown.

[0042] The full drum signal in step 4.2.2 is the pressure signal output by the pressure sensor of the winding drum on the winding head or is used to identify whether the drum is full according to the full drum speed characteristics of the wire drawing machine motor. The wire drawing machine motor running working curve, such as Fig.11 As shown, t1 is the motor acceleration climbing time, t2 is the stable speed running time, and when t>(t1+t2), the winding head corresponding to the motor is full.

[0043] In step 4.2.2, the energy efficiency control unit monitors the full cylinder signal and Fig.11 The running time t is used for advance charging and discharging preparation; 1) It is known that the wire drawing machine needs time t3=t1+t2 to fill the barrel and the power consumption is Q0; ​2) When the energy storage battery has a power level of Q1 at the start of wire drawing by the wire drawing machine, it is estimated that the remaining power of the energy storage battery when the wire drawing machine is full of spools will be Q2 = Q1 - Q0; 3) The external discharge amount of the wire drawing machine from full spool braking to shutdown is Q3, that is, Fig.11 the braking energy in 4) According to the operating energy dataset (Q0, Q3, t)k of this wire drawing machine, where k is the length of the time series since the wire drawing machine started running; it is estimated that if the rechargeable amount Q4 of the energy storage battery is less than Q3 after time t, the energy efficiency control unit controls the energy storage unit K3 to close and discharge to the power grid during the peak time period before the full spool signal of the wire drawing machine occurs. The discharge amount Q5 is Q4 - Q3, preparing a charging energy space for the energy storage battery and simultaneously performing discharge arbitrage. The discharge method is as Fig.12 shown.

[0044] Steps for safety protection in step four: 4A. The total voltage of the energy storage battery is lower than the battery discharge threshold U 放th or the lowest single - cell voltage of the energy storage battery is lower than the single - cell discharge threshold and it is not in the charging time period at this time. That is, during the operation of the wire drawing machine, the energy efficiency control unit monitors that the total voltage of the energy storage battery is lower than the battery discharge threshold U 放th or the lowest single - cell voltage of the energy storage battery is lower than the single - cell discharge threshold and it is not in the charging time period at this time. Then the energy efficiency control unit controls K1 and K2 to disconnect, playing a protective role for the energy storage battery until it enters the charging time period, and then charging the energy storage battery according to step six; 4B. The battery temperature of the energy storage battery exceeds the battery temperature range [T th1 , T th2 . That is, during the operation of the wire drawing machine, the energy efficiency control unit monitors that the battery temperature of the energy storage battery exceeds the battery temperature range [T th1 , T th2 . Then the energy efficiency control unit controls K1 and K2 to disconnect, playing a protective role for the energy storage battery until the temperature of the energy storage battery returns to the specified range, and then operating according to step 4.3; 4C. Any of A1 to Am exceeds the maximum current operation threshold I th . That is, during the operation of the wire drawing machine, any of A1 to Am exceeds the maximum current operation threshold I th . Then the energy efficiency control unit controls K1 and K2 to disconnect, playing a protective role for the electrical circuit until the main current of the wire drawing machine returns to normal, and then operating according to step three; 4D. When any one of the 1 - M wire drawing machines needs to be repaired, the energy efficiency control unit controls K1 and K2 to disconnect, ensuring that the electrical circuit is de - energized, playing a role in personal safety protection until the repair is completed, and then operating according to step three.

[0045] Example 1 is a cascade energy-saving design for multiple wire drawing machine production lines, and its specific electrical topology is as follows: Figure 8 As shown, there are 1 to M wire drawing machine motor units cascaded, equipped with a set of slow-start unit, energy storage battery, conversion device and energy efficiency control unit (which can be installed in one box or in multiple boxes), with production line type multiple wire drawing machine cascade energy control function, among which M1~M2n correspond to the driving motors in the wire drawing machines, and the randomly allocated motors drive several wire drawing winding heads, wire arrangement reciprocating function, oiling and barrel changing transverse movement.

[0046] Embodiment 2 is a modular energy-saving design of a wire drawing machine, and its specific electrical topology is as follows: Fig. 9 As shown, each wire drawing machine has a set of wire drawing machine motor unit, slow-start unit, energy storage battery, conversion device and energy efficiency control unit (which can be installed in one box or in multiple boxes), with modular energy control function, among which M1~M2n correspond to the driving motors in the wire drawing machine, and the randomly allocated motors drive several wire drawing winding heads, wire arrangement reciprocating function, oiling and barrel changing transverse movement.

[0047] The energy control function method described in the above-mentioned embodiment 1 and embodiment 2 includes the energy storage capacity configuration of the wire drawing machine, energy efficiency and economic control, and safety protection.

[0048] Wire drawing machine energy storage capacity configuration method: The power and capacity specifications of the energy storage battery are configured according to the following two conditions: Condition 1: The total motor power P of the wire drawing machine sum = =P 储能电池 And the total motor current I sum = =I 储能电池 ; Where m is the number of cascaded motor units of the wire drawing machine or the number of wire drawing machines, n is the number of corresponding transformation control modules in each wire drawing machine, m and n are both integers greater than or equal to 1, j is any value from 1 to m, and i is any value from 1 to n; Condition 2: The minimum voltage between D+ and D- at both ends of the wire drawing machine's conversion control module is U min And the maximum value is U max The minimum voltage between B+ and B- of the energy storage battery is and the maximum value is , =U max + , =U min + ,in and is the tuning coefficient.

[0049] At the same time, an energy efficiency control unit is configured, which collects the status of the energy storage battery in real time, and controls the corresponding electrical components to complete the charging and discharging of the energy storage battery according to the status of the energy storage battery. It also supports accepting remote control commands and completes charging and discharging actions and protection management in combination with the status of the energy storage battery.

[0050] The energy efficiency control unit monitors and analyzes the working data of the energy storage battery. The voltage between the energy storage battery B+ and B- is U B The voltage between D+ and D- at both ends of the conversion control module of the wire drawing machine is U D , when the energy efficiency control unit monitors the voltage range of the energy storage battery [U th1 , U th2 ] and the battery temperature range [T th1 , T th2 ], and K1 or K2 is disconnected at this time, the energy efficiency control unit controls K2 to close and synchronously controls the slow-start unit to work until U B =U D * (in is an integer less than 1), at this time, close K1 to synchronously control the slow-start unit to stop working, and the power flow direction is as follows: Fig.10 shown.

[0051] Energy efficiency and economic control are carried out while safety protection is performed at the same time; when energy efficiency and economic control is performed, energy control performs charge and discharge control and arbitrage according to the operating characteristics of the energy storage battery based on the wire drawing machine; when safety protection is performed, it plays a role in protecting the energy storage battery, electrical circuits and personal safety.

[0052] Energy efficiency and economic control are carried out according to the following steps: When the motors M1-M2n in the wire drawing machines 1-m correspond to the winding head, the wire arrangement reciprocating function, the oiling or the barrel changing transverse movement, etc., U B >U Dj (j is any value from 1 to m), the energy storage battery automatically discharges toward the motor, and the power flow direction is as follows: Fig.10 shown.

[0053] When the winding head, wire arrangement reciprocating function, oiling or barrel changing transverse operation corresponding to the motors M1-M2n in the wire drawing machines 1-m are braked and stopped, the braked motors are discharged to the outside, and the following situations exist: B1) If the total power P discharged by the motor 发 >Total power P of the motor being run 耗 , resulting in U B Dj (j is any value from 1 to m), then the motor charges the energy storage battery, and the power flows as follows:​ Fig.13 as shown; B2) If the energy efficiency control unit detects a full bobbin signal and the energy storage battery cannot be charged at this time, the energy efficiency control unit controls K3 to close, controls the conversion device to discharge to the AC bus, and recovers and utilizes energy until the full bobbin signal disappears, and then controls K3 to open again to stop discharging to the AC bus; Here, the full bobbin signal is the pressure signal output by the pressure sensor on the bobbin of the winding head. It is also possible to identify whether the bobbin is full according to the full bobbin rotation speed characteristics of the wire drawing machine motor. For example, Fig.11 as shown in the working curve, t1 is the motor acceleration and climbing time, t2 is the stable rotation speed operation time. When t > (t1 + t2), the winding head corresponding to the motor is full bobbin; The energy efficiency control unit monitors the full bobbin signal and makes preparations for advance charge and discharge according to Fig.11 the running time t; 1) It is known that the time required for the wire drawing machine to be full bobbin is t3 = t1 + t2 and the power consumption is Q0; 2) When the wire drawing machine starts drawing, the power of the energy storage battery is Q1, and it is estimated that the remaining power of the energy storage battery when the wire drawing machine is full bobbin is Q2 = Q1 - Q0; 3) The external discharge amount of the wire drawing machine from full bobbin braking to shutdown is Q3, that is, Fig.11 the braking energy in; 4) According to the running energy data set (Q0, Q3, t)k of this wire drawing machine, where k is the time series length from the start of the wire drawing machine to the current position; it is estimated that if the rechargeable amount Q4 of the energy storage battery is < Q3 after t time, the energy efficiency control unit controls the energy storage unit K3 to close and discharge to the power grid during the peak time period before the full bobbin signal of the wire drawing machine occurs, and the discharge amount Q5 is Q4 - Q3, preparing the charging energy space for the energy storage battery and simultaneously conducting discharge arbitrage; the discharge method is as Fig.12 shown;

[0054] B3) If the total power P of the motor discharging externally 发 <the total power P of the motor consuming power during operation 耗 , if there exists U B <U Dj (j is any value from 1 to m), and it is not within the charging time period at this time, then control K1 to open at this time to prevent charging the energy storage battery from the conversion control module; if there exists U B >U Dj (j is any value from 1 to m), then the energy storage battery automatically discharges towards the motor at this time.

[0055] C) When the energy efficiency control unit monitors that the total voltage of the energy storage battery is lower than the battery discharge threshold U 放th or the lowest single - cell voltage of the energy storage battery is lower than the single - cell discharge threshold At this time, during the charging period, the energy efficiency control unit controls K1 and K2 to be disconnected, and controls K3 to be closed, and controls the conversion device to charge the energy storage battery until the total voltage of the energy storage battery exceeds the battery charging threshold U 充th Or the highest cell voltage of the energy storage battery exceeds the cell charging threshold At this time, the energy efficiency control unit controls the conversion device to stop working and disconnects K3, and simultaneously controls the monitoring and analysis of the energy storage battery working data according to the above energy efficiency control unit.

[0056] D) If it is in the discharge time period, and the amount of electricity consumed by the motor running during this time period < ,in, is a coefficient less than 1, is the remaining power of the battery; then the energy efficiency control unit controls the energy storage battery to discharge to the AC bus to supply power to other loads except the wire drawing machine, thereby realizing the arbitrage function.

[0057] Safety protection methods: During the entire life cycle of the wire drawing machine, the safety protection method is as follows: 1) During the operation of the wire drawing machine, the energy efficiency control unit monitors that the total voltage of the energy storage battery is lower than the battery discharge threshold U 放th Or the lowest cell voltage of the energy storage battery is lower than the cell discharge threshold If it is not in the charging time period, the energy efficiency control unit controls K1 and K2 to disconnect, which protects the energy storage battery until it enters the charging time period, and then charges the energy storage battery according to the above D) control; 2) During the operation of the wire drawing machine, the energy efficiency control unit monitors that the battery temperature of the energy storage battery exceeds the battery temperature range [T th1 , T th2 ], the energy efficiency control unit controls K1 and K2 to disconnect, which protects the energy storage battery until the temperature of the energy storage battery returns to the specified range, and then acts according to C) above; 3) When the wire drawing machine is running, A1~Am arbitrarily exceeds the maximum current operation threshold I th , the energy efficiency control unit controls K1 and K2 to disconnect, which plays a role in protecting the electrical circuit until the main current of the wire drawing machine returns to normal, and then the energy efficiency control unit monitors and analyzes the working data of the energy storage battery; 4) When any of the 1 to m wire drawing machines needs maintenance, the energy efficiency control unit controls K1 and K2 to disconnect, ensuring that the electrical circuit is out of power, thus protecting personal safety. After the maintenance is completed, the energy efficiency control unit monitors and analyzes the working data of the energy storage battery.

[0058] The present invention proposes a storage capacity configuration for the wire drawing machine according to the electrical characteristics of the wire drawing machine, performs energy efficiency and economic control and safety protection according to the electricity consumption characteristics of the wire drawing machine, ensures the economic charging and discharging logic under the premise of safety, ensures stable and reliable electricity consumption, green energy recovery and lowest electricity cost under normal production of the wire drawing machine, and promotes the rapid transformation of the wire drawing machine production towards new energy; energy recovery control logic and economic charging and discharging logic, the energy efficiency control unit controls the energy storage battery to discharge to the AC bus, supplies power to other loads except the wire drawing machine, and realizes the arbitrage function.

[0059] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A new energy-saving power distribution control method for a wire drawing machine, characterized in that: The following steps are involved: Step 1: Energy-saving design of wire drawing machine: Cascade energy-saving design of multiple wire drawing machine production lines, cascade of 1 to m wire drawing machine motor units, equipped with a set of slow-start unit, energy storage battery, conversion device and energy efficiency control unit; modular energy-saving design of wire drawing machine, each wire drawing machine is equipped with a set of wire drawing machine motor unit, slow-start unit, energy storage battery, conversion device and energy efficiency control unit; Step 2: Wire drawing machine energy storage capacity configuration: configure the power and capacity specifications of the energy storage battery; configure the energy efficiency control unit; Step 3: The energy efficiency control unit monitors and analyzes the working data of the energy storage battery. The voltage between the energy storage battery B+ and B- is U B The voltage between D+ and D- at both ends of the conversion control module of the wire drawing machine is U D , when the energy efficiency control unit monitors the voltage range of the energy storage battery [U th1 , U th2 ] and the battery temperature range [T th1 , T th2 ], and K1 or K2 is disconnected at this time, the energy efficiency control unit controls K2 to close and synchronously controls the slow-start unit to work until U B =U D * ,in is an integer less than 1, at which time K1 is closed to synchronously control the slow-start unit to stop working; Step 4: When performing energy efficiency and economic control, energy control performs charge and discharge control and arbitrage according to the operating characteristics of the energy storage battery based on the wire drawing machine; while performing safety protection at the same time, it plays a role in protecting the energy storage battery, electrical circuits and personal safety.

2. A new energy-saving power distribution control method for a wire drawing machine according to claim 1, characterized in that: The power and capacity specifications of the energy storage battery in step 2 are configured according to conditions 1 and 2. Condition 1 is the total motor power P of the wire drawing machine. sum = =P 储能电池 And the total motor current I sum = =I 储能电池， Where m is the number of cascaded motor units of the wire drawing machine or the number of wire drawing machines, n is the number of corresponding conversion control modules in each wire drawing machine, m and n are both integers greater than or equal to 1, j is any value from 1 to m, and i is any value from 1 to n; condition 2 is that the minimum voltage between D+ and D- at both ends of the conversion control module of the wire drawing machine is U min And the maximum value is U max The minimum voltage between B+ and B- of the energy storage battery is and the maximum value is , =U max + , =U min + ,in and is the tuning coefficient; The energy efficiency control unit configured in step 2 is an energy efficiency control unit that collects the state of the energy storage battery in real time, and controls the corresponding electrical components to complete the charging and discharging of the energy storage battery according to the state of the energy storage battery, and also supports receiving remote control commands, and completes the charging and discharging actions and protection management in combination with the state of the energy storage battery; The multiple cascade energy-saving design route of the wire drawing machine production line in step one includes several wire drawing machine excitation units, slow-start units, energy storage batteries, conversion devices and energy efficiency control units. The energy storage battery and the conversion device are connected by wires, and the AC bus and the conversion device are connected by wires. The wire drawing machine excitation unit includes a switching control module connected to the AC bus wires and a switching control module connected to the motor wires of the wire drawing machine. The switching control modules are electrically connected, and the wires between the switching control modules are electrically connected to the wires between the energy storage battery and the conversion device. K1 and K2 are respectively provided on the wires therein, and a buffer unit is provided on the positive pole wire. The slow-start unit, the energy storage battery, the conversion device and the switching control module connected to the motor wires of the wire drawing machine are all electrically connected to the energy efficiency control unit, and K1 and K2 are all electrically connected to the energy efficiency control unit. The energy efficiency control unit is electrically connected to the wires between the conversion device and the AC bus, and the connecting wire between the energy efficiency control unit and the motor of the wire drawing machine is a full-barrel signal transmission line.

3. A new energy-saving power distribution control method for a wire drawing machine according to claim 2, characterized in that: The modular energy-saving design route of the wire drawing machine in the step one includes a slow-start unit, an energy storage battery, a conversion device and an energy efficiency control unit, and an exchange control module connected to the motor wires of the wire drawing machine. The exchange control modules are all connected to the wires between the AC busbars, the energy storage battery and the conversion device are connected by wires, the AC busbar and the conversion device are connected by wires, the wires between the exchange control modules are electrically connected to the wires between the energy storage battery and the conversion device, K1 and K2 are respectively provided on the wires there, and a buffer unit is provided on the positive wire, the slow-start unit, the energy storage battery, the conversion device and the exchange control module connected to the motor wires of the wire drawing machine are all electrically connected to the energy efficiency control unit, and K1 and K2 are all electrically connected to the energy efficiency control unit, the energy efficiency control unit is electrically connected to the wires between the conversion device and the AC busbar, and the connecting wires between the energy efficiency control unit and the motor of the wire drawing machine are full-barrel signal transmission lines.

4. A new energy-saving power distribution control method for a wire drawing machine according to claim 3, characterized in that: Steps for energy efficiency and economic control in step 4: 4.1, the energy storage battery automatically discharges in the direction of the motor: when the winding head, wire arrangement reciprocating function, oiling or barrel change lateral movement corresponding to the motor M1~M2n in the wire drawing machine 1~m work, U B >U Dj , j is any value from 1 to m, then the energy storage battery automatically discharges toward the motor; 4.2, Discharge of the motor during braking and shutdown: When the motors M1 - M2n in the wire drawing machines 1 - m corresponding to the winding heads, reciprocating functions of wire arranging, oiling, or barrel-changing cross movement work are braked and shut down, the motors during braking and shutdown discharge externally at this time; 4.3, the total voltage of the energy storage battery is lower than the battery discharge threshold U 放th Or the lowest cell voltage of the energy storage battery is lower than the cell discharge threshold And at this time in the charging time period, that is, when the energy efficiency control unit monitors that the total voltage of the energy storage battery is lower than the battery discharge threshold U 放th Or the lowest cell voltage of the energy storage battery is lower than the cell discharge threshold At this time, during the charging time period, the energy efficiency control unit controls K1 and K2 to be disconnected, and controls K3 to be closed, and controls the conversion device to charge the energy storage battery until the total voltage of the energy storage battery exceeds the battery charging threshold U 充th Or the highest cell voltage of the energy storage battery exceeds the cell charging threshold , then the energy efficiency control unit controls the conversion device to stop working and disconnects K3, and synchronously controls according to step 3; 4.4, control the energy storage battery to discharge to the AC bus, if it is in the discharge time period, and the power consumed by the motor running during this time period < ,in, is a coefficient less than 1, If it is the remaining power of the battery, the energy efficiency control unit controls the energy storage battery to discharge to the AC bus to supply power to other loads except the wire drawing machine, thereby realizing the arbitrage function.

5. A new energy-saving power distribution control method for a wire drawing machine according to claim 4, characterized in that: In the step 4.2, the external discharge of the motor during braking and shutdown has the following situations: 4.2.1 If P 发 >P 耗 , leading to U B Dj , that is, if the total power P discharged by the motor is 发 >Total power P of the motor being run 耗 , leading to U B Dj , j is any value from 1 to m, then the motor charges the energy storage battery;​​ 4.2.2, The energy efficiency control unit detects the full barrel signal: If the energy efficiency control unit detects the full barrel signal and the energy storage battery cannot be charged at this time, the energy efficiency control unit controls K3 to close, controls the conversion device to discharge to the AC bus, and conducts energy recovery and utilization until the full barrel signal disappears, and then controls K3 to disconnect again to stop discharging to the AC bus; 4.2.3 If P 发 <P 耗 , that is, if the total power P discharged by the motor is 发 <Total power P of the motor being run 耗 , 4.2.3A, if there is U B Dj , j is any value from 1 to m, and it is not in the charging time period, then K1 is controlled to be disconnected to prevent the conversion control module from charging the energy storage battery; 4.2.3B, if there is U B >U Dj , j is any value from 1 to m, then the energy storage battery automatically discharges toward the motor.​ 6. A new energy-saving power distribution control method for a wire drawing machine according to claim 5, characterized in that: The operation characteristics of the wire drawing machine for energy efficiency and economic control in step 4 include: a full barrel signal of the wire drawing machine and a full barrel motor braking signal; 1) a full barrel signal of the wire drawing machine: as a pre-braking signal of the wire drawing machine brake motor, to prepare for charging the energy storage battery; 2) a full barrel motor braking signal is a voltage U across the conversion control module of the wire drawing machine. D , at this time, the conditions for instantaneous determination of whether to charge.

7. A new energy-saving power distribution control method for a wire drawing machine according to claim 6, characterized in that: In the steps three and 4.1, the power flow direction of the energy-saving design circuit of the wire drawing machine is from the AC bus and the energy storage battery to the motors of the wire drawing machine; in the step 4.2.1, the power flow direction of the energy-saving design circuit of the wire drawing machine is from the motors of the wire drawing machine to the AC bus and the energy storage battery.

8. A new energy-saving power distribution control method for a wire drawing machine according to claim 7, characterized in that: In the step 4.2.2, the full barrel signal is the pressure signal output by the pressure sensor on the winding head's reel or identifies whether the barrel is full according to the full barrel rotation speed characteristics of the wire drawing machine motor. According to the operating curve of the wire drawing machine motor, where t1 is the motor acceleration and ramp-up time, t2 is the stable rotation speed operating time, when t > (t1 + t2), the winding head corresponding to the motor is full.

9. A new energy-saving power distribution control method for a wire drawing machine according to claim 8, characterized in that: In the step 4.2.2, the energy efficiency control unit monitors the full barrel signal and makes preparations for charging and discharging in advance according to the operating time t of the wire drawing machine motor; 1) It is known that the time required for the wire drawing machine to be full is t3 = t1 + t2 and the power consumption is Q0; 2) When the wire drawing machine starts drawing, the power of the energy storage battery is Q1, and it is expected that the remaining power of the energy storage battery when the wire drawing machine is full is Q2 = Q1 - Q0; 3) The external discharge amount of the wire drawing machine from full barrel braking to shutdown is Q3, which is the braking energy; 4) According to the operating energy dataset (Q0, Q3, t)k of this wire drawing machine, where k is the time series length from the start of the wire drawing machine's operation to the current position; it is expected that if the rechargeable amount Q4 of the energy storage battery after t time is < Q3, the energy efficiency control unit controls the energy storage unit K3 to close and discharge to the power grid during the peak time period before the full barrel signal of the wire drawing machine occurs, and the discharge amount Q5 is Q4 - Q3, preparing a charging energy space for the energy storage battery and simultaneously conducting discharge arbitrage.

10. A new energy-saving power distribution control method for a wire drawing machine according to claim 9, characterized in that: The steps for safety protection in step four: 4A, the total voltage of the energy storage battery is lower than the battery discharge threshold U 放th Or the lowest cell voltage of the energy storage battery is lower than the cell discharge threshold And at this time, it is not in the charging time period, that is, during the operation of the wire drawing machine, the energy efficiency control unit monitors that the total voltage of the energy storage battery is lower than the battery discharge threshold U 放th Or the lowest cell voltage of the energy storage battery is lower than the cell discharge threshold If it is not in the charging time period, the energy efficiency control unit controls K1 and K2 to disconnect, so as to protect the energy storage battery until the charging time period is entered, and then controls to charge the energy storage battery according to step 6; 4B. The battery temperature of the energy storage battery exceeds the battery temperature range [T th1 , T th2 ], that is, during the operation of the wire drawing machine, the energy efficiency control unit monitors that the battery temperature of the energy storage battery exceeds the battery temperature range [T th1 , T th2 ], the energy efficiency control unit controls K1 and K2 to disconnect, which protects the energy storage battery until the battery temperature returns to the specified range, and then proceeds according to step 4.3; 4C, A1~Am arbitrarily exceeds the maximum current operation threshold I th , that is, during the operation of the wire drawing machine, A1~Am arbitrarily exceeds the maximum current operation threshold I th , the energy efficiency control unit controls K1 and K2 to disconnect, which protects the electrical circuit until the main current of the wire drawing machine returns to normal, and then acts according to step three; 4D. When any one of the 1 - M wire drawing machines needs to be repaired, the energy efficiency control unit controls K1 and K2 to disconnect, ensuring that the electrical circuit is de-energized, providing personal safety protection until after the repair is completed, and then operating according to step three.

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