CN111505966B

CN111505966B - Electrical control method and device for producing plate strip

Info

Publication number: CN111505966B
Application number: CN202010187719.6A
Authority: CN
Inventors: 李�杰; 蒋晓云; 宋贺飞; 史鸿晓; 郭飞; 尤瑞瑞; 樊景阳; 李甫; 杨光; 李应涛; 常少丽; 王竹青; 周文娟; 杨红宾; 张红亮; 马佳响
Original assignee: Luoyang Heyuan Control System Co ltd
Current assignee: Luoyang Heyuan Control System Co ltd
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2024-04-16
Anticipated expiration: 2040-03-17
Also published as: CN111505966A

Abstract

The invention discloses an electrical control method and device for producing a plate strip, which are applied to a plate strip production system comprising a harmonic compensation unit, a finishing line unit, a rolling mill unit and a cooling water unit, wherein the method comprises the following steps: determining switching states of all harmonic compensation branches in the harmonic compensation unit according to preset target compensation capacity; determining finishing line control parameters according to preset finishing target parameters of the plate strip to be finished entering the finishing line unit; determining rolling mill control parameters according to preset target rolling parameters of the metal to be rolled entering the rolling mill unit; determining cooling water control parameters of the cooling water unit according to preset target temperature distribution of the plate and strip; and controlling the production of the plate strip according to the switching state, the finishing line control parameter, the rolling mill control parameter and the cooling water control parameter, thereby further improving the qualification rate of the finished product of the plate strip and improving the production efficiency.

Description

Electrical control method and device for producing plate strip

Technical Field

The present application relates to the field of electrical control, and more particularly to an electrical control method and apparatus for producing sheet and strip.

Background

The plate strip is a rectangular section metal material with a large width-thickness ratio, is mainly produced by a rolling method, and is widely used in industries of bridges, ships, buildings, pressure vessels, automobile manufacturing, household appliances and the like which are closely related to life.

The electric control system is composed of a plurality of electric elements and is used for controlling a certain object or some objects, so that the controlled equipment can safely and reliably operate. The main functions of the electrical control system are: automatic control, protection, monitoring and measurement.

With the development of science, technology and industry, higher requirements are placed on various properties of the sheet and strip, including yield strength, tensile strength, elongation, magnetic induction, core loss (including hysteresis loss, eddy current loss, etc.), grain size, texture, etc., which require strict quality control of the sheet and strip production process. The plate and strip production process can comprise various processing flows, such as harmonic compensation, finishing lines, rolling by a rolling mill, cooling processes and the like, and the technology of applying an electric control system to the production process is also available in the prior art, so that the production efficiency is improved to a certain extent compared with manual control, but the control process is rough, the fineness of control parameters is not high, the qualification rate of the plate and strip finished products is affected, and a large number of manual operations are relied on, so that the further improvement of the production efficiency is limited.

Therefore, how to further improve the yield of the plate and strip products and improve the production efficiency is a technical problem to be solved at present.

Disclosure of Invention

The invention provides an electrical control method for producing a plate strip, which is applied to a plate strip production system comprising a harmonic compensation unit, a finishing line unit, a rolling mill unit and a cooling water unit and is used for solving the technical problems of low yield and low production efficiency of the plate strip in the prior art, and the method comprises the following steps:

determining switching states of harmonic compensation branches in the harmonic compensation unit according to preset target compensation capacity, wherein the harmonic compensation branches are connected in parallel with a power supply loop of a transmission device to be compensated;

determining finishing line control parameters according to preset finishing target parameters of the plate strip to be finished entering the finishing line unit, wherein the finishing line control parameters comprise continuous quenching control parameters, slitting control parameters, transverse cutting control parameters, foil pouring control parameters and cleaning line control parameters;

determining rolling mill control parameters according to preset target rolling parameters of metal to be rolled entering the rolling mill unit, wherein the rolling mill control parameters specifically comprise casting mill control parameters, composite rolling mill control parameters and continuous rolling mill control parameters;

Determining cooling water control parameters of the cooling water unit according to preset target temperature distribution of the plate and strip, wherein the cooling water control parameters specifically comprise closed cooling water control parameters and spray cooling water control parameters;

and controlling to produce the plate strip according to the switching state, the finishing line control parameter, the rolling mill control parameter and the cooling water control parameter.

Accordingly, the present invention also provides an electrical control apparatus for producing a plate strip, which is applied to a plate strip production system including a harmonic compensation unit, a finishing line unit, a rolling mill unit, and a cooling water unit, the electrical control apparatus comprising:

the first determining module is used for determining the switching state of each harmonic compensation branch in the harmonic compensation unit according to a preset target compensation capacity, and the harmonic compensation branch is connected in parallel with a power supply loop of the transmission device to be compensated;

the second determining module is used for determining finishing line control parameters according to preset finishing target parameters of the plate and strip to be finished entering the finishing line unit, wherein the finishing line control parameters comprise continuous quenching control parameters, slitting control parameters, transverse cutting control parameters, foil pouring control parameters and cleaning line control parameters;

The third determining module is used for determining rolling mill control parameters according to preset target rolling parameters of the metal to be rolled entering the rolling mill unit, wherein the rolling mill control parameters specifically comprise casting mill control parameters, compound rolling mill control parameters and continuous rolling mill control parameters;

a fourth determining module, configured to determine cooling water control parameters of the cooling water unit according to a preset target temperature distribution of the strip, where the cooling water control parameters specifically include a closed cooling water control parameter and a spray cooling water control parameter;

and the control module is used for controlling the production of the plate and strip according to the switching state, the finishing line control parameter, the rolling mill control parameter and the cooling water control parameter.

Accordingly, the present invention also proposes a computer-readable storage medium having stored therein instructions that, when run on a terminal device, cause the terminal device to perform the electrical control method for producing a sheet strip as described above.

Accordingly, the invention also proposes a computer program product which, when run on a terminal device, causes the terminal device to perform the electrical control method for producing a sheet strip as described above.

Compared with the prior art, the invention has the following beneficial effects:

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic flow chart of an electrical control method for producing a sheet strip according to an embodiment of the present invention;

FIG. 2 shows a schematic diagram of a harmonic compensation branch in an embodiment of the invention;

FIG. 3 is a schematic diagram of a harmonic compensation control system according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a harmonic compensation function test screen according to an embodiment of the present invention;

FIG. 5 is a schematic view of a continuous quenching control system monitoring screen in an embodiment of the invention;

FIG. 6 is a schematic diagram of a monitor screen of a slitting control system according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a cross cut control system monitor screen in an embodiment of the invention;

FIG. 8 is a schematic diagram of a monitoring screen of the foil backing control system according to an embodiment of the invention;

FIG. 9 is a schematic diagram showing a control screen of an auxiliary machine of a cleaning line in an embodiment of the present invention;

FIG. 10 is a schematic view of a main drive frame of a cleaning line according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of a main screen of a cleaning line according to an embodiment of the present invention;

FIG. 12 is a schematic view of a trend of the cleaning line according to an embodiment of the present invention;

FIG. 13 is a schematic view of a casting machine control system monitoring screen in an embodiment of the present invention;

FIG. 14 is a schematic diagram of a main frame of a tandem mill control system according to an embodiment of the present invention;

FIG. 15 is a schematic diagram of a main frame of a tandem mill control system according to an embodiment of the present invention;

FIG. 16 is a schematic view showing an auxiliary machine control screen of a tandem mill control system according to an embodiment of the present invention;

FIG. 17 is a schematic diagram of a main screen of a closed cooling water control system according to an embodiment of the present invention;

FIG. 18 is a schematic diagram of a main screen of a spray cooling water control system in an embodiment of the invention;

fig. 19 shows a schematic structural view of an electrical control device for producing a sheet strip according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

As described in the background art, the prior art has low qualification rate and low production efficiency of the finished product of the plate and the strip.

In order to solve the above problems, an embodiment of the present application provides an electrical control method for producing a strip, which controls the production of the strip according to a switching state, a finishing line control parameter, a rolling mill control parameter, and a cooling water control parameter, thereby further improving the yield of the strip and improving the production efficiency.

The flow chart of the electrical control method for producing the plate strip, which is provided by the embodiment of the invention and is shown in fig. 1, is applied to a plate strip production system comprising a harmonic compensation unit, a finishing line unit, a rolling mill unit and a cooling water unit, and comprises the following steps:

step S101, determining switching states of all harmonic compensation branches in the harmonic compensation unit according to preset target compensation capacity, wherein the harmonic compensation branches are connected with a power supply loop of a transmission device to be compensated in parallel.

Specifically, since harmonics are generated in the production system of the plate and strip, the harmonics refer to various sub-components which are obtained by performing fourier series decomposition on periodic non-sinusoidal ac quantities and are larger than integer multiples of fundamental frequency, and are commonly called higher harmonics, interference of the higher harmonics can affect electric energy quality, and power factors can be increased through harmonic compensation to reduce equipment capacity and power loss, stabilize voltage and improve power supply quality, improve power transmission stability and power transmission capacity in long-distance power transmission, and balance active and reactive power of three-phase loads. Harmonic compensation also takes account of harmonic governance. The capacitor is also connected in series with the reactor in harmonic compensation, the capacitor and the reactor form a filter, series resonance occurs under the harmonic frequency of specific times, and the impedance of the harmonic of specific times is very low, so that the harmonic in the system flows in the filter and does not flow to a system connecting point any more, and the function of filtering the harmonic is achieved.

In a specific application scenario of the present application, as shown in fig. 2, a schematic diagram of a harmonic compensation branch is shown, a harmonic compensation unit includes a plurality of harmonic compensation branches, each harmonic compensation branch is connected in parallel with a power supply loop of a transmission device to be compensated to implement in-situ harmonic compensation, and a switching state of each harmonic compensation branch in the harmonic compensation unit is determined according to a preset target compensation capacity.

In order to better control harmonic compensation, in a preferred embodiment of the present application, the switching state of each harmonic compensation branch in the harmonic compensation unit is determined according to a preset target compensation capacity, which specifically is:

determining that motors and motor fans of an uncoiler, a left coiling machine, a first host machine, a second host machine and a right coiling machine in the harmonic compensation unit are switched on, and no alarm signal exists;

determining that the left and right tension in the harmonic compensation unit is qualified and rising to a target speed;

determining the compensation capacity of each power supply loop according to the preset target compensation capacity;

and switching each harmonic compensation branch according to the compensation capacity of each power supply loop, and determining the switching state.

Specifically, in the specific application scenario of the present application, the harmonic compensation unit includes an uncoiler, a left coiler, a first host, a second host, a right coiler and other devices, the motors and motor fans of the devices are determined to be switched on, no alarm signal is generated, the left and right tension in the harmonic compensation unit is determined to be qualified and the speed is increased to a target speed, so that the harmonic compensation unit is started, the compensation capacity of each power supply loop is determined according to a preset target compensation capacity, each harmonic compensation branch is switched according to the compensation capacity of each power supply loop, the switching state is determined, and as shown in fig. 4, the harmonic compensation branches of 15 loops can be switched on.

It should be noted that, a person skilled in the art may perform harmonic compensation on loops of different devices according to actual needs, may perform automatic switching, or may perform manual switching, and other ways of determining switching states of each harmonic compensation branch in the harmonic compensation unit according to a preset target compensation capacity all belong to the protection scope of the present application.

In order to obtain an accurate preset target compensation capacity, in a preferred embodiment of the present application, the harmonic compensation branch includes a thyristor, an anti-harmonic reactor and a capacitor, where the preset target compensation capacity is calculated by a formula:

wherein Q is the preset target compensation capacity, P is the active power,for the power factor angle before reactive power compensation,and the power factor angle after reactive compensation.

Specifically, the thyristor can realize that the switching harmonic compensation branch is not disturbed, and the reactance capacitance filtering branch is equivalent to a low-impedance channel, so that the corresponding harmonic current mostly flows into the branch. Thereby achieving the purposes of absorbing harmonic current, reducing the injection value of harmonic current at the system side and reducing the distortion rate of system voltage.

It should be noted that, the solution of the above preferred embodiment is only one specific implementation solution proposed in the present application, and other ways of determining the preset target compensation capacity are all within the protection scope of the present application.

Step S102, determining finishing line control parameters according to preset finishing target parameters of the plate strip to be finished entering the finishing line unit, wherein the finishing line control parameters specifically comprise continuous quenching control parameters, slitting control parameters, transverse cutting control parameters, foil pouring control parameters and cleaning line control parameters.

Specifically, the finishing line comprises processing flows of continuous quenching, longitudinal cutting, transverse cutting, foil pouring, cleaning line and the like. Mainly carries out secondary deep processing on the cold-rolled sheet strip, and meets the use requirements of different industries. And determining finishing line control parameters according to preset finishing target parameters of the plate strip to be finished entering the finishing line unit, wherein the finishing line control parameters specifically comprise continuous quenching control parameters, slitting control parameters, transverse cutting control parameters, foil pouring control parameters and cleaning line control parameters.

In order to obtain accurate finishing line control parameters, in a preferred embodiment of the present application, the finishing line unit specifically includes a continuous quenching unit, a slitting unit, a transverse cutting unit, a foil rewinding unit and a cleaning line unit, and the finishing line control parameters are determined according to preset finishing target parameters of the plate strip to be finished entering the finishing line unit, specifically:

Determining that motors of a frequency converter, a rectifying fan, pre-machine straightening, post-machine straightening and a pinch roll in the continuous quenching unit are switched on, and no alarm signal exists; heating is started according to the target furnace temperature; determining that the left and right tension in the continuous quenching unit is qualified and increases the speed to a target speed; determining the continuous quenching control parameters according to the preset finishing target parameters, wherein the continuous quenching control parameters comprise the temperatures of upper and lower areas of a quenching furnace, heating time, maximum speed, acceleration and deceleration time, uncoiling, coiling initial coil diameter and coiling initial thickness;

determining that an uncoiler, an upper cutter disc, a lower cutter disc, an upper coil, a lower coil, a slitter edge, a first hydraulic machine, a second hydraulic machine and an auxiliary motor in the slitting unit are switched on, and no alarm signal exists; determining that the uncoiling tension, the coiling tension and the uncoiling tension in the slitting unit are qualified and the coiling tension and the uncoiling tension are accelerated to the target speed; determining the slitting control parameters according to the preset finishing target parameters, wherein the slitting control parameters comprise a shearing width, an uncoiling coil diameter, an uncoiling thickness, a cutter disc diameter, a maximum speed, an acceleration and deceleration time, an upper coil diameter, a lower coil diameter and a waste edge coil diameter;

determining that an uncoiler, post-machine straightening, scissors, a conveyor belt, a first hydraulic machine, a second hydraulic machine and an auxiliary motor in the transverse cutting unit are switched on, and no alarm signal exists; determining that the tension in the transverse cutting unit is qualified and is accelerated to a target speed; determining the transverse cutting control parameters according to the preset finishing target parameters, wherein the transverse cutting control parameters comprise a shearing length, a shearing number, an uncoiling coil diameter, an uncoiling thickness, a maximum speed, an acceleration and deceleration time and a straightening gap;

Determining that a motor and a motor fan of a large uncoiling, a small uncoiling, a pinch roll and a coiling machine in the foil pouring unit are switched on, and no alarm signal exists; determining that the left and right tension in the foil rewinding unit is qualified and increases the speed to a target speed; determining the foil pouring control parameters according to the preset finishing target parameters, wherein the foil pouring control parameters comprise coil diameter, loop height, loop speed regulating quantity and uncoiling torque limiting;

determining a first closing state set corresponding to an auxiliary hydraulic pump station, a high-pressure pump station, a process lubrication pump station, an uncoiler, a coiling machine, a first motor and a second motor in a cleaning line unit according to the preset finishing target parameters; determining the control parameters of the cleaning line according to the first closing state set;

and determining the finishing line control parameters according to the continuous quenching control parameters, the slitting control parameters, the transverse cutting control parameters, the foil pouring control parameters and the cleaning line control parameters.

As described above, the finishing line unit specifically includes a continuous quenching unit, a slitting unit, a transverse cutting unit, a foil rewinding unit, and a cleaning line unit.

The continuous quenching unit generally adopts a roller hearth type heat treatment furnace to complete the heating process, adopts a roller quenching machine to complete the processes of quenching, controls cooling and the like, comprises equipment such as a frequency converter, a rectifying fan, pre-machine straightening, post-machine straightening, a pinch roll and the like, and mainly comprises the temperature of upper and lower areas of a quenching furnace, heating time, maximum speed, acceleration and deceleration time, uncoiling, initial coiling diameter and initial coiling thickness.

The longitudinal cutting is a cutting mode along the longer length of the plate and strip, is suitable for longitudinal cutting work of the metal strip, and is used for rewinding the slit narrow strip into a coil, and the main equipment comprises an uncoiler, an upper cutter disc, a lower cutter disc, an upper coil, a lower coil, a slitter edge, a first hydraulic press, a second hydraulic press and auxiliary equipment, wherein the main control parameters are cutting width, uncoiling coil diameter, uncoiling thickness, cutter disc diameter, maximum speed, acceleration and deceleration time, upper coil diameter, lower coil diameter and slitter edge coil diameter.

The transverse cutting is used for uncoiling, leveling, sizing and shearing the metal plate strip into flat plates with required lengths and stacking the flat plates. The main equipment in the transverse cutting unit comprises an uncoiler, machine post straightening, scissors, a conveyor belt, a first hydraulic machine, a second hydraulic machine and an auxiliary motor, and the main control parameters comprise shearing length, shearing number, uncoiling coiling diameter, uncoiling thickness, maximum speed, acceleration and deceleration time and straightening clearance.

The foil pouring is to roll metal into foil, the main equipment of the foil pouring unit comprises a large uncoiling roll, a small uncoiling roll, a pinch roll and a coiling machine, the control parameters mainly comprise the coiling diameter, the loop height, the loop speed regulating quantity and the uncoiling torque limiting limit, wherein the loop is used as a loop quantity detecting device to measure the loop quantity between frames, the loop quantity is kept constant through the regulation of a loop height control system, and the stable continuous rolling process is ensured. The loop also serves as an actuator for constant small tension control of the strip, minimizing coupling and cross-talk between the frames and between functions due to variations in strip tension.

The main equipment in the cleaning line unit comprises an auxiliary hydraulic pump station, a high-pressure pump station, a process lubrication pump station, an uncoiler, a coiling machine, a first motor and a second motor, different equipment is started according to different operation requirements, and main control parameters are set of closing states of all the equipment.

The finishing line control parameters are obtained by determining a plurality of control parameters for each equipment unit based on the target control parameters for each equipment unit in the finishing line unit.

It should be noted that the solution of the above preferred embodiment is only one specific implementation solution proposed in the present application, and other ways of determining the finishing line control parameter according to the preset finishing target parameter of the sheet strip to be finished entering the finishing line unit are all within the protection scope of the present application.

Step S103, determining rolling mill control parameters according to preset target rolling parameters of the metal to be rolled entering the rolling mill unit, wherein the rolling mill control parameters specifically comprise casting mill control parameters, compound rolling mill control parameters and continuous rolling mill control parameters.

Specifically, the rolling mill is a device for realizing a metal rolling process, the rolling mill comprises different types, and rolling mill control parameters can be determined according to preset target rolling parameters of metal to be rolled entering the rolling mill unit, wherein the rolling mill control parameters specifically comprise casting mill control parameters, composite rolling mill control parameters and continuous rolling mill control parameters.

In order to obtain accurate rolling mill control parameters, in a preferred embodiment of the present application, the rolling mill units specifically include a casting mill unit, a compound mill unit and a tandem mill unit, and the rolling mill control parameters are determined according to preset target rolling parameters of the metal to be rolled entering the rolling mill unit, specifically:

determining that motors for upper roller, lower roller, coiling, upper spray gun, lower spray gun, titanium wire machine, first hydraulic pump, second hydraulic pump, pump for hydraulic pump, high-pressure pump, main machine lubrication and coiling lubrication in the casting and rolling machine unit are switched on, and no alarm signal is generated; determining casting and rolling machine control parameters according to the preset target rolling parameters, wherein the casting and rolling machine control parameters specifically comprise spray gun frequency, titanium wire machine frequency, upper and lower roller diameters and finished product thickness;

determining that an external pump station in the compound rolling mill unit normally operates without an alarm signal; starting the compound rolling mill unit to press; determining the control parameters of the compound rolling mill according to the preset target rolling parameters, wherein the control parameters of the compound rolling mill comprise displacement, pressure, position gain, pressure gain, offset step length and adjustment step length;

determining a second closing state set corresponding to an uncoiler, a first-frame motor, a second-frame motor, a third-frame motor, a fourth-frame motor, a coiling machine, an auxiliary hydraulic pump station, a high-pressure pump station and a process lubrication pump station in the tandem mill unit according to the preset target rolling parameters; determining the continuous rolling mill control parameters according to the second closing state set;

And determining the rolling mill control parameters according to the casting mill control parameters, the compound rolling mill control parameters and the continuous rolling mill control parameters.

As described above, the rolling mill units specifically include a casting mill unit, a clad mill unit, and a tandem mill unit.

The casting and rolling machine is to roll the metal blank repeatedly into a plate, and the equipment of the casting and pressing machine unit comprises an upper roller, a lower roller, coiling, an upper spray gun, a lower spray gun, a titanium wire machine, a first hydraulic pump, a second hydraulic pump, a pump for the hydraulic pump, a high-pressure pump, main machine lubrication and coiling lubrication, wherein the control parameters are spray gun frequency, titanium wire machine frequency, upper roller diameter, lower roller diameter and finished product thickness.

The composite rolling mill is to make different metals into alloy plates, and the control parameters of the composite rolling mill are specifically displacement, pressure, position gain, pressure gain, offset step length and adjustment step length.

The continuous rolling mill is used for continuously and deeply processing the plate strip and the plate, and equipment in the continuous rolling mill unit comprises an uncoiler, a first-frame motor, a second-frame motor, a third-frame motor, a fourth-frame motor, a coiling machine, an auxiliary hydraulic pump station, a high-pressure pump station and a process lubrication pump station, wherein control parameters are a closing state set of each equipment.

The mill control parameters are obtained by determining a plurality of control parameters for each plant unit based on the target control parameters for each plant unit in the mill unit.

It should be noted that the solution of the above preferred embodiment is only one specific implementation solution proposed in the present application, and other ways of determining the rolling mill control parameters according to the preset target rolling parameters of the metal to be rolled entering the rolling mill unit are all within the protection scope of the present application.

Step S104, determining cooling water control parameters of the cooling water unit according to preset target temperature distribution of the plate strip, wherein the cooling water control parameters specifically comprise closed cooling water control parameters and spray cooling water control parameters.

Specifically, in order to eliminate the processing hardness of the plate strip, the plate strip is recrystallized and the plasticity of the plate strip is recovered, in the process, the plate strip is required to be subjected to heat treatment, annealing and other operations, and after the plate strip is annealed, the plate strip is required to be cooled to a certain temperature, so that the next processing procedure or storage and transportation can be performed. The cooling water units are used for cooling the plate and strip materials so as to meet the requirements of the production process. And determining cooling water control parameters of the cooling water unit according to preset target temperature distribution of the plate and strip, wherein the cooling water control parameters specifically comprise closed cooling water control parameters and spray cooling water control parameters.

In order to determine accurate cooling water control parameters, in a preferred embodiment of the present application, the cooling water unit includes a closed cooling water unit and a spray cooling water unit, and the cooling water control parameters of the cooling water unit are determined according to a preset target temperature distribution of the strip, specifically:

Determining that motors of a first spray pump, a second spray pump, a first fan, a second fan, a first circulating pump, a second circulating pump and a third circulating pump in the closed cooling water unit are switched on, and no alarm signal exists; starting the closed cooling water unit; determining closed cooling water control parameters according to the preset target temperature distribution, wherein the closed cooling water control parameters specifically comprise a circulating water tank water level, a water collecting tank water level, a spray water tank temperature, a first rolling mill actual water inlet temperature, a second rolling mill actual water inlet temperature, a first three-way valve opening degree and a second three-way valve opening degree;

determining that the uncoiling and coiling diameters in the spray cooling water unit are correctly set, the thickness and width of the incoming materials are correctly set, and no alarm signal is generated; selecting a tension mode or an elongation mode; the direct current motors in the spray cooling water unit are normally operated in a switching-on and switching-off mode; the switching-on and switching-off operation of each alternating current motor in the spray cooling water unit is normal; determining a spray cooling water control parameter according to the preset target temperature distribution, wherein the spray cooling water control parameter specifically comprises a spray position and a spray duration;

and determining the cooling water control parameter according to the closed cooling water control parameter and the spraying cooling water control parameter.

As described above, the cooling water unit includes a closed cooling water unit and a spray cooling water unit.

The closed water is closed cooling water, the cooling water circulates in a closed system, the cooling water is generally cooled by open water through a water-water exchanger, and the equipment of the closed cooling water unit comprises a first spray pump, a second spray pump, a first fan, a second fan, a first circulating pump, a second circulating pump and a third circulating pump, wherein the control parameters are the water level of a circulating water tank, the water level of a water collecting tank, the temperature of the spraying water tank, the actual water inlet temperature of a first rolling mill, the actual water inlet temperature of a second rolling mill, the opening degree of a first three-way valve and the opening degree of a second three-way valve.

The spraying cooling water is used for spraying water on the plate and strip for cooling, and the main equipment of the spraying cooling water unit comprises a direct current motor and an alternating current motor, and the control parameters are the spraying position and the spraying time.

The cooling water control parameters are obtained by determining a plurality of control parameters for each of the equipment units based on the target control parameters for each of the equipment units in the cooling water unit.

It should be noted that the solution of the above preferred embodiment is only one specific implementation solution provided in the present application, and other ways of determining the cooling water control parameters of the cooling water unit according to the preset target temperature distribution of the strip are all within the protection scope of the present application.

And step S105, controlling the production of the plate strip according to the switching state, the finishing line control parameter, the rolling mill control parameter and the cooling water control parameter.

In order to facilitate the user to acquire the historical data record, in a preferred embodiment of the present application, the method further includes receiving a data query instruction of the user;

and displaying the historical data record according to the data query instruction.

By applying the technical scheme, the switching state of each harmonic compensation branch in the harmonic compensation unit is determined according to the preset target compensation capacity, and the harmonic compensation branch is connected in parallel with a power supply loop of a transmission device to be compensated; determining finishing line control parameters according to preset finishing target parameters of the plate strip to be finished entering the finishing line unit, wherein the finishing line control parameters comprise continuous quenching control parameters, slitting control parameters, transverse cutting control parameters, foil pouring control parameters and cleaning line control parameters; determining rolling mill control parameters according to preset target rolling parameters of metal to be rolled entering the rolling mill unit, wherein the rolling mill control parameters specifically comprise casting mill control parameters, composite rolling mill control parameters and continuous rolling mill control parameters; determining cooling water control parameters of the cooling water unit according to preset target temperature distribution of the plate and strip, wherein the cooling water control parameters specifically comprise closed cooling water control parameters and spray cooling water control parameters; and controlling the production of the plate strip according to the switching state, the finishing line control parameter, the rolling mill control parameter and the cooling water control parameter, thereby further improving the qualification rate of the finished product of the plate strip and improving the production efficiency.

In order to further explain the technical idea of the invention, the technical scheme of the invention is described with specific application scenarios.

The embodiment of the invention provides an electrical control system based on a produced plate strip based on the electrical control method of the produced plate strip, which is applied to the plate strip production system comprising a harmonic compensation unit, a finishing line unit, a rolling mill unit and a cooling water unit, and the produced plate strip is controlled according to a switching state, a finishing line control parameter, a rolling mill control parameter and a cooling water control parameter, so that the yield of the finished product of the plate strip is further improved, and the production efficiency is improved.

The electrical control system for producing the plate and strip comprises a harmonic compensation control system, a finishing line control system, a rolling mill control system and a cooling water control system, and the respective systems are described below.

1. The harmonic compensation control system mainly aims at improving the power factor to reduce equipment capacity and power loss, stabilizing voltage and improving power supply quality, improving transmission stability and transmission capacity in long-distance transmission and balancing active and reactive power of a three-phase load. Harmonic compensation also takes account of harmonic governance. The capacitor is also connected in series with the reactor in harmonic compensation, the capacitor and the reactor form a filter, series resonance occurs under the harmonic frequency of specific times, and the impedance of the harmonic of specific times is very low, so that the harmonic in the system flows in the filter and does not flow to a system connecting point any more, and the function of filtering the harmonic is achieved.

A microcomputer reactive compensation controller, a thyristor, a harmonic elimination reactor and a capacitor can be adopted to realize a harmonic elimination undisturbed switching mode; the reactive power compensation device is connected with the transmission device in parallel to realize local harmonic compensation and calculate compensation capacity:

wherein: q is the preset target compensation capacity, P is the active power,for the power factor angle before reactive power compensation,and for the power factor angle after reactive compensation, designing the capacity configuration of the scheme according to analysis, calculation and equipment working conditions and combining the experiences of reactive compensation and harmonic wave management.

Fig. 2 is a schematic diagram of a compensating branch, which is designed according to the components, the magnitude and the reactive power requirements of the harmonic current. For harmonics, the LC filter leg corresponds to a low impedance path, causing a substantial portion of the corresponding harmonic current to flow into the leg. Thereby achieving the purposes of absorbing harmonic current, reducing the injection value of harmonic current at the system side and reducing the distortion rate of system voltage. Meanwhile, the device can also provide the capacitive reactive power for a system or a load, and improves the system work factor.

The control method based on the harmonic compensation control system comprises the following steps:

1. clicking "harmonic compensation" to enter a main picture of the harmonic compensation control system, as shown in fig. 3;

2. Clicking the main transmission to enter a main transmission picture to determine that the main motors are switched on and the operation table has no emergency stop signal;

3. clicking the main picture to return;

4. starting the system, and setting left and right tension;

5. operating the speed-up button to a required speed;

6. clicking a parameter setting button of a main menu, and entering a parameter setting picture;

7. setting the capacity of each loop, and setting motor parameters according to motor nameplates;

8. clicking an output test menu to enter an output test picture, as shown in fig. 4;

9. in the picture of 'output test', each loop can be switched, and the output state of each loop can be tested under the condition that the main loop is not electrified.

The harmonic compensation control system can also record and archive the reactive power, active power, current and other important parameters of each motor in the rolling process.

2. The finishing line control system comprises a continuous quenching unit, a slitting unit, a transverse cutting unit, a foil pouring machine and a cleaning unit. The finishing line mainly carries out secondary deep processing on the cold-rolled sheet strip, and meets the use requirements of different industries.

The finishing line control system adopts an advanced control system structure of centralized management and decentralized control in the current industrial control field, is a real process control system, and breaks down the danger of the whole system to the minimum, thereby ensuring the reliability of the whole system to the greatest extent.

The finishing line control system further comprises a continuous quenching control system, a slitting control system, a transverse cutting control system, a foil pouring control system and a cleaning line control system, and the systems are respectively described below.

1. Continuous quenching control system

The corresponding continuous quenching control process is as follows:

(1) Clicking 'continuous quenching' to enter a main transmission picture of a continuous quenching control system, as shown in fig. 5;

(2) Clicking the transmission switch-on to determine that all motors are switched on and no fault signal exists;

(3) Returning to the main picture;

(4) Starting the system, and setting left and right tension;

(5) Setting the furnace temperature and starting heating;

(6) Operating the speed-up button to a required speed;

(7) Clicking the parameter setting to perform parameter setting in a numerical value input box;

(8) Setting the temperature and heating time of the upper and lower areas of the quenching furnace;

(9) Setting maximum speed and acceleration and deceleration time;

(10) The initial winding diameter and thickness of the uncoiling and coiling are set.

The continuous quenching control system can also record and archive the current, the rotating speed, the furnace temperature and other important parameters of each motor in the production process.

2. Slitter control system

The corresponding slitting control process is as follows:

(1) Clicking a slitter unit to enter a main transmission picture of a slitter control system, as shown in fig. 6;

(2) Clicking the transmission switch-on to determine that all motors are switched on and no emergency stop signal exists;

(3) Returning to the main picture;

(4) Starting a system, and setting uncoiling, coiling and uncoiling tension;

(5) Setting a shearing width;

(6) Checking the state of the board surface;

(7) Operating the speed-up button to a required speed;

(8) Clicking the parameter setting to perform parameter setting in a numerical value input box;

(9) Setting the uncoiling coil diameter and thickness;

(10) Setting the diameter of a cutter head;

(11) Setting maximum speed and acceleration and deceleration time;

(12) Setting up the upper roll and the lower roll diameter

(13) Setting the winding diameter of the slitter edge.

The slitting control system can also record and archive the current, the rotating speed and other important parameters of each motor in the production process.

3. Transverse cutting control system

The corresponding transversal control procedure is as follows:

(1) Clicking a transverse cutting unit to enter a main transmission picture of a transverse cutting control system, as shown in figure 7;

(3) Returning to the main picture;

(4) Starting a system, and setting tension;

(5) Setting a shearing length and the number of sheets;

(6) Operating the speed-up button to a required speed;

(8) Clicking a numerical value input box to set parameters;

(9) Setting the uncoiling coil diameter and thickness;

(10) Setting maximum speed and acceleration and deceleration time;

(11) Fine tuning the straightening gap.

The transverse cutting control system can also record and archive the current, the rotating speed and other important parameters of each motor in the production process.

4. Foil rewinding control system

The corresponding foil rewinding control process is as follows:

(1) Clicking the foil pouring machine set to enter a main transmission picture of the foil pouring control system, as shown in fig. 8;

(2) Setting parameters in a numerical value input frame of a monitoring picture;

(3) Clicking the transmission switch-on to determine that all motors are switched on and no emergency stop signal exists;

(4) Starting the system, and setting left and right tension;

(5) Operating the speed-up button to a required speed;

(6) Setting the diameters and the heights of loops of the coils;

(7) And setting the loop speed adjustment quantity, and limiting the uncoiling torque.

The foil rewinding control system can also record and archive the current, the rotating speed and other important parameters of each motor in the production process.

5. Cleaning line control system

The corresponding cleaning line control process is as follows:

(1) Clicking a cleaning unit to enter a cleaning unit picture;

(2) And (3) auxiliary closing, namely clicking an auxiliary machine control menu in a main picture, and opening an auxiliary machine control picture, as shown in fig. 9. The auxiliary machine control picture comprises start-stop control of auxiliary equipment such as an auxiliary hydraulic pump station, a high-pressure pump station, process lubrication and the like, and a user starts a corresponding motor according to actual needs. If the remote pump station is at the maintenance position, corresponding display is made on the picture.

(3) The main drive is switched on, and the main drive menu is clicked in the lower menu to open the main drive picture, as shown in fig. 10. The main transmission picture comprises the switching-on control of main transmission equipment such as uncoiler switching-on, coiling machine switching-on, S1 motor switching-on, S2 motor switching-on and the like, and a user switches on each motor from the picture before starting up, so that a main loop of the system is electrified. In the running process of the system, a user can monitor the running state (including opening and closing) of each main transmission in the picture. The picture also comprises an uncoiling operation table, and the emergency stop button of the main operation table is in a state.

(4) Monitoring, and producing after all the devices are ready. Clicking on the "home" button below the screen brings up the home as shown in fig. 11. The user can monitor various main data in the production process on this screen. The user inputs the inlet thickness, the inlet initial winding diameter, the outlet initial winding diameter, the unwinding tension and the winding tension according to the production process.

(5) Data record query

As shown in fig. 12, if the user needs to view various data in the production process, the user may click on the "trend chart" button to enter the data record viewing screen. The picture comprises an uncoiler data curve, a coiling motor data curve, an S1 motor data curve and an S2 motor data curve. The user can view the images respectively according to the needs, and can also display and view the images simultaneously.

The wash line control system also displays the current status of the pump station and motor sensing elements. Clicking the "fault record" button in the lower right hand corner of fig. 12 can query information such as time of occurrence of fault, fault point, cause of fault, etc.

3. Rolling mill control system

The advanced rolling mill comprises a casting mill, a compound rolling mill and a continuous rolling unit. The casting and rolling machine repeatedly rolls the aluminum ingot into a plate; the composite rolling mill is to make different metals into alloy plates; the continuous rolling unit is used for continuously and deeply processing the plate strip and the plate.

The rolling mill control system further comprises a casting mill control system, a compound mill control system and a continuous mill control system, and the control systems are respectively described below.

1. Casting and rolling machine control system

The corresponding casting and rolling machine control process is as follows:

(1) Clicking the casting machine to enter a main transmission picture of a casting machine control system, as shown in fig. 13;

(3) Clicking the alarm picture confirms no fault and returns to the monitoring picture.

(4) Entering a monitoring picture, and setting parameters;

(5) Setting the frequency of a spray gun, the frequency of a titanium wire machine, the roller diameters of an upper roller and a lower roller and the thickness of a finished product.

The casting and rolling machine control system can also record and archive the current, rotation speed, tension and other important parameters of each motor in the rolling process.

2. Control system of composite rolling mill

The corresponding control process of the compound rolling mill is as follows:

(1) Clicking the compound rolling mill to enter a main transmission picture of a casting and rolling mill control system, as shown in fig. 14;

(2) Determining that each parameter is normal and giving an alarm without faults;

(3) Determining normal operation of an external pump station;

(4) Starting the system, and pressing;

(5) Setting displacement or pressure to perform closed-loop operation after the pressing is completed;

(6) Clicking the parameter setting to perform parameter setting in a numerical value input box;

(7) Setting each position and pressure gain;

(8) Setting offset and adjustment step length.

The control system of the compound rolling mill can also record and archive the displacement, pressure and other important parameters of the oil cylinder in the production process.

3. Tandem mill control system

The corresponding tandem mill control process may be:

(1) Clicking a continuous rolling mill, and entering a continuous rolling mill picture;

(2) As shown in fig. 15, all the devices are ready for production. Clicking the "home" button below the screen enters the home. The user can monitor various main data in the production process on this screen. The user inputs the inlet thickness, the outlet thickness, the initial winding diameter, the unwinding tension, the winding tension and the machine train speed according to the production process requirement.

(3) Clicking a main transmission menu in the lower menu, and opening a main transmission picture. The main transmission picture comprises the switching-on control of main transmission equipment such as uncoiler switching-on, one-frame motor switching-on, two-frame motor switching-on, three-frame motor switching-on, four-frame motor switching-on, coiling switching-on and the like, and a user switches on each motor from the picture before starting up, so that a main loop of the system is electrified. In the running process of the system, a user can monitor the running state (including opening and closing) of each main transmission in the picture. The picture also comprises the states of the uncoiling operation tables and the emergency stop buttons of the main operation table.

(4) As shown in fig. 16, the "auxiliary control" menu is clicked on the main screen, and the auxiliary control screen is opened. The auxiliary machine control picture comprises start-stop control of auxiliary equipment such as an auxiliary hydraulic pump station, a high-pressure pump station, process lubrication and the like, and a user starts a corresponding motor according to actual needs. If the remote pump station is at the maintenance position, corresponding display is made on the picture.

As shown in fig. 16, if a user needs to view various data in the production process, he can click the "trend chart" button to enter a data record view screen, which contains some important data curves of the main motor including (motor current, motor rotation speed, given tension, unwind and wind-up reel diameters). The user can view the images respectively according to the needs, and can also display and view the images simultaneously. If the system fails, clicking a fault record button below the picture to enter fault alarm, and checking the information page. The page can display the current state of the pump station and the motor detection element. The information such as fault occurrence time, fault point, fault reason and the like can be queried by clicking the lower right corner fault record button.

4. Cooling water control system

And the cooling system comprises closed cooling water cooling and spray cooling. The cooling systems are used for cooling the plate and strip materials so as to meet the requirements of the production process.

The cooling water control system comprises a closed cooling water control system and a spraying cooling water control system.

1. Closed cooling water control system

As shown in fig. 17, which is a schematic diagram of a main picture of a closed cooling water control system, the closed cooling water control process is as follows:

(1) First, the spray pump is started:

(1) and (5) turning on a spray pump starting switch on the electric cabinet to see whether the running indicator lamp on the picture is on or not.

(2) Checking whether the running direction of the water pump is consistent with the labeling direction of the water pump. If the power supply is turned off immediately after the reverse rotation, the three wires of the motor are replaced by two wires, and the switch is turned on newly.

(3) Observing the water level of the water collecting tank, if the water level of the water pump is low, the spray water pump can suck air to cause air

Chamber ", so please note the running water level.

(2) Starting a fan:

(1) and opening a fan starting switch on the electric cabinet.

(2) The running direction of the blower is checked. The fan of the company is used for exhausting air, namely hot air is exhausted from the air duct, if the fan is found to be in an air suction state, the power supply is immediately turned off, two three wires of the motor are replaced, and the switch is newly turned on.

(3) If the tower type selected by you is a belt drive, the belt will be stretched in the early stages of operation, so the first inspection and adjustment will be performed for 1-2 days of operation. And then periodically performing inspection and adjustment.

(3) Starting a circulating water pump:

(1) and (5) turning on a circulating water pump starting switch on the electric cabinet to see whether the running indicator lamp on the picture is on or not.

(2) After the start of the operation, the flow rate control valve was gradually opened to adjust the amount of water described by the name plate of the cooling tower.

(3) And (3) paying attention to the water level of the circulating water tank, timely supplementing water into the water tank, and when a buzzer for alarming the liquid level on the electric control box sounds, indicating that timely water supplementing is needed. And (3) injection: during operation, vibration, noise, circulating water temperature, current, and the like are sufficiently noted, and the presence or absence of abnormality is often confirmed. The vibration and noise sources are mainly the motor, the speed reducer and the fan rotating parts, so that attention is paid to no minute abnormality.

2. Spray cooling water control system

As shown in fig. 18, a schematic diagram of an alternating-current operation screen of the spray cooling water control system is shown, and the corresponding spray cooling water control process is as follows:

(1) Checking whether the system has an alarm or not, and whether various indications are normal or not. And (3) whether the uncoiling and coiling diameters are set correctly or not. Either tension mode or elongation mode is selected.

(2) Whether the setting of the uncoiling and coiling coil diameters is correct, and the setting of the thickness and the width of the incoming materials is correct. Selecting a tension mode or an elongation mode;

(3) Performing switching-on and switching-off operation on the direct current motor;

(4) If the fault exists, firstly checking the fault code, finding out the corresponding fault description, and performing the next operation after the fault is removed;

(5) Performing switching-on and switching-off operation on the alternating current motor;

(6) The red indication is an overhaul state indication. After the AC motor is switched on, the running state of the motor is confirmed on site;

(7) And the auxiliary pump station is displayed, and alarm signals of the centering pump station, the water storage tank, the filter tank, the low-pressure cleaning and high-pressure cleaning equipment are displayed, so that the running state of the equipment is convenient to check.

(8) Displaying the state of a limit switch signal of the field mechanical equipment;

(9) Displaying the running state of the motor fan;

(10) And (5) inputting equipment roller diameter parameters.

(11) The speed and current of each motor can be displayed in real time, and the uncoiling tension and the coiling tension can be displayed;

(12) The speed, current, uncoiling tension, coiling tension and other historical trends of each motor can be queried, and the field engineer can conveniently remove faults.

To achieve the above technical object, an embodiment of the present application further provides an electrical control device for producing a plate and strip, which is applied to a plate and strip production system including a harmonic compensation unit, a finishing line unit, a rolling mill unit, and a cooling water unit, as shown in fig. 19, the device includes:

The first determining module 601 is configured to determine a switching state of each harmonic compensation branch in the harmonic compensation unit according to a preset target compensation capacity, where the harmonic compensation branch is connected in parallel with a power supply loop of the transmission device to be compensated;

a second determining module 602, configured to determine finishing line control parameters according to preset finishing target parameters of the sheet strip to be finished entering the finishing line unit, where the finishing line control parameters specifically include a continuous quenching control parameter, a slitting control parameter, a transverse cutting control parameter, a foil pouring control parameter, and a cleaning line control parameter;

a third determining module 603, configured to determine rolling mill control parameters according to preset target rolling parameters of the metal to be rolled entering the rolling mill unit, where the rolling mill control parameters specifically include a casting mill control parameter, a composite rolling mill control parameter, and a tandem rolling mill control parameter;

a fourth determining module 604, configured to determine cooling water control parameters of the cooling water unit according to a preset target temperature distribution of the strip, where the cooling water control parameters specifically include a closed cooling water control parameter and a spray cooling water control parameter;

the control module 605 is used for controlling the production of the plate strip according to the switching state, the finishing line control parameter, the rolling mill control parameter and the cooling water control parameter.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, one of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An electrical control method for producing a plate strip, applied to a plate strip production system including a harmonic compensation unit, a finishing line unit, a rolling mill unit, and a cooling water unit, the method comprising:

controlling production of the plate strip according to the switching state, the finishing line control parameter, the rolling mill control parameter and the cooling water control parameter;

the switching state of each harmonic compensation branch in the harmonic compensation unit is determined according to the preset target compensation capacity, and specifically comprises the following steps:

switching each harmonic compensation branch according to the compensation capacity of each power supply loop, and determining the switching state;

The finishing line unit specifically comprises a continuous quenching unit, a slitting unit, a transverse cutting unit, a foil pouring unit and a cleaning line unit, and determines finishing line control parameters according to preset finishing target parameters of the plate strip to be finished entering the finishing line unit, specifically:

determining that motors of a frequency converter, a rectifying fan, pre-machine straightening, post-machine straightening and a pinch roll in the continuous quenching unit are switched on, and no alarm signal exists; heating is started according to the target furnace temperature;

determining that the left and right tension in the continuous quenching unit is qualified and increases the speed to a target speed; determining the continuous quenching control parameters according to the preset finishing target parameters, wherein the continuous quenching control parameters comprise the temperatures of upper and lower areas of a quenching furnace, heating time, maximum speed, acceleration and deceleration time, uncoiling, coiling initial coil diameter and coiling initial thickness; determining that an uncoiler, an upper cutter disc, a lower cutter disc, an upper coil, a lower coil, a slitter edge, a first hydraulic machine, a second hydraulic machine and an auxiliary motor in the slitting unit are switched on, and no alarm signal exists;

determining that the uncoiling tension, the coiling tension and the uncoiling tension in the slitting unit are qualified and the coiling tension and the uncoiling tension are accelerated to the target speed; determining the slitting control parameters according to the preset finishing target parameters, wherein the slitting control parameters comprise a shearing width, an uncoiling coil diameter, an uncoiling thickness, a cutter disc diameter, a maximum speed, an acceleration and deceleration time, an upper coil diameter, a lower coil diameter and a waste edge coil diameter; determining that an uncoiler, post-machine straightening, scissors, a conveyor belt, a first hydraulic machine, a second hydraulic machine and an auxiliary motor in the transverse cutting unit are switched on, and no alarm signal exists;

Determining that the tension in the transverse cutting unit is qualified and is accelerated to a target speed; determining the transverse cutting control parameters according to the preset finishing target parameters, wherein the transverse cutting control parameters comprise a shearing length, a shearing number, an uncoiling coil diameter, an uncoiling thickness, a maximum speed, an acceleration and deceleration time and a straightening gap;

determining that a motor and a motor fan of a large uncoiling, a small uncoiling, a pinch roll and a coiling machine in the foil pouring unit are switched on, and no alarm signal exists; determining that the left and right tension in the foil rewinding unit is qualified and increases the speed to a target speed;

determining the foil pouring control parameters according to the preset finishing target parameters, wherein the foil pouring control parameters comprise coil diameter, loop height, loop speed regulating quantity and uncoiling torque limiting; determining a first closing state set corresponding to an auxiliary hydraulic pump station, a high-pressure pump station, a process lubrication pump station, an uncoiler, a coiling machine, a first motor and a second motor in a cleaning line unit according to the preset finishing target parameters; determining the control parameters of the cleaning line according to the first closing state set;

determining the finishing line control parameters according to the continuous quenching control parameters, the slitting control parameters, the transverse cutting control parameters, the foil rewinding control parameters and the cleaning line control parameters;

The rolling mill unit specifically comprises a casting mill unit, a compound rolling mill unit and a continuous rolling mill unit, and the rolling mill control parameters are determined according to preset target rolling parameters of the metal to be rolled entering the rolling mill unit, specifically:

Determining the mill control parameters according to the casting mill control parameters, the composite mill control parameters and the tandem mill control parameters;

the cooling water unit comprises a closed cooling water unit and a spraying cooling water unit, and the cooling water control parameters of the cooling water unit are determined according to the preset target temperature distribution of the plate strip, specifically:

2. The method of claim 1, wherein the harmonic compensation branch comprises a thyristor, an anti-harmonic reactor, and a capacitor, the preset target compensation capacity being calculated by the formula:

wherein Q is the preset target compensation capacity, P is the active power,for the power factor angle before reactive compensation, +.>And the power factor angle after reactive compensation.

3. The method of claim 1, further comprising,

receiving a data query instruction of a user;

4. An electrical control device for producing a plate strip, applied to a plate strip production system including a harmonic compensation unit, a finishing line unit, a rolling mill unit and a cooling water unit, characterized in that the electrical control device comprises:

5. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored therein instructions, which, when run on a terminal device, cause the terminal device to perform the electrical control method for producing a sheet strip according to any one of claims 1-4.

6. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored therein a computer program which, when run on a terminal device, causes the terminal device to perform the electrical control method for producing a sheet strip according to any one of claims 1-4.