CN205862191U - A kind of controllable silicon low-frequency power control system being applied to large power, electrically slag hearth - Google Patents
A kind of controllable silicon low-frequency power control system being applied to large power, electrically slag hearth Download PDFInfo
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- CN205862191U CN205862191U CN201620571517.0U CN201620571517U CN205862191U CN 205862191 U CN205862191 U CN 205862191U CN 201620571517 U CN201620571517 U CN 201620571517U CN 205862191 U CN205862191 U CN 205862191U
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Abstract
This utility model relates to a kind of controllable silicon low-frequency power control system being applied to large power, electrically slag hearth, including: main 6RA70 controller, from 6RA70 controller, pulsed drive amplification module I, pulsed drive amplification module II, controllable silicon cabinet, PLC200 and touch screen；The core of power control system described in the utility model is 6RA70 controller, its digitized is utilized to shift to the control characteristic triggering and being exceedingly fast, improve response speed and the control accuracy of power control system, two 6RA70 controllers use master & slave control to export 12 groups of pulse waves, the pulsation making electric power output voltage is less, export more stable, simultaneously with PLC200 and the combination of touch screen, improve the operability of power control system, portable, in electroslag furnace industry, Large Copacity electroslag furnace uses this low frequency control system, there is power supply magnetic interference minimum, without kelvin effect, power supply control accuracy is high, the advantages such as power supply output continuously adjustabe and power factor height, greatly improve the quality of electroslag furnace melting iron and steel.
Description
Technical field
This utility model relates to electric and electronic technical field, a kind of controllable silicon being applied to large power, electrically slag hearth
Low-frequency power control system.
Background technology
At present in electroslag furnace industry, what electroslag furnace commonly used is exchange stove, and domestic electroslag furnace power supply major part is adopted
With electrical network single phase alternating current power supply of directly power supply after transformer pressure-reducing, power control system uses simple from Rhizoma Nelumbinis, or hands
Dynamic control, the most gradually develops into PLC (programmable logic controller (PLC)) and controls.Such as Liaoning electroslag furnace producer, electroslag furnace structure
For single-phase bipolar electrode series system, its power supply uses power frequency single-phase transformer, and transformer secondary output has 7 taps, point 7 grades of pressure regulation
Output.Power supply controls to use on-load tap-changer of transformer mode to control, in order to ensure the stability in reflow process, in remelting
Before process starts, need manually regulation sub-connecting switch of transformer conversion gear, to reach the output voltage of melting requirement.
The mode that the power supply of exchange stove uses transformator directly to power easily causes unbalanced power supply, and networking impedance variation is big,
Electromagnetic interference is serious, manually regulation power supply output in fusion process simultaneously, there is manual operation labor intensity big, and power supply exports
Regulation is discontinuous, is vulnerable to the fluctuation of line voltage, the problems such as electric power output voltage precision is extremely low.Thus in reflow process more
Cannot ensure the stability of the molten speed of slag gentleness, these all quality and technical specification impact on electroslag furnace casting product are very big, enter
And affect the quality of melting iron and steel.
Utility model content
There is manual operation for power control method in the electroslag furnace of existing market loaded down with trivial details, voltage-regulation is discontinuous, shadow
Ringing the technical problems such as power factor and current balance type degree, Control of Voltage precision are low, the purpose of this utility model is to provide one
It is applied to the controllable silicon low-frequency power control system of large power, electrically slag hearth.
For reaching object above, this utility model adopts the technical scheme that:
A kind of controllable silicon low-frequency power control system being applied to large power, electrically slag hearth, including: main 6RA70 controller, from
6RA70 controller, pulsed drive amplification module I, pulsed drive amplification module II, controllable silicon cabinet, PLC200 and touch screen；
Described controllable silicon cabinet includes controllable silicon cabinet I and controllable silicon cabinet II；
Described touch screen is for realizing setting and the display of controllable silicon low-frequency power control system parameter；
Calculated with actual values output that described PLC200 feeds back for the parameter set according to touch screen and controllable silicon cabinet are given
Definite value；
Described main 6RA70 controller is for the set-point according to PLC200 output and the synchronizing signal of controllable silicon cabinet feedback
Calculate pulse-triggered position and export direct impulse or reverse impulse；
Described pulse position output direct impulse or the reverse impulse following main 6RA70 controller from 6RA70 controller；
Described pulsed drive amplification module I is for carrying out power amplification to the output pulse of main 6RA70 controller；
Described pulsed drive amplification module II is for carrying out power amplification to from the output pulse of 6RA70 controller；
Described controllable silicon cabinet I is for receiving the output pulse of pulsed drive amplification module I, and triggers controllable silicon output forward
Voltage or backward voltage；
Described controllable silicon cabinet II is for receiving the output pulse of pulsed drive amplification module II, and just triggers controllable silicon output
To voltage or backward voltage.
On the basis of such scheme, described PLC200 includes that PID (PID) controls and commutates.
On the basis of such scheme, described PID control is fed back for the parameter setting touch screen and controllable silicon cabinet
Actual value carries out ratio calculating；Commutation is for calculating the commutating frequency of main 6RA70 controller output pulse.
On the basis of such scheme, when described commutating frequency is zero, main 6RA70 controller only exports direct impulse.
On the basis of such scheme, described main 6RA70 controller and between 6RA70 controller use device agreement enter
Row communication, described set-point and the control word receiving main 6RA70 controller from 6RA70 controller.
On the basis of such scheme, described controllable silicon cabinet I and controllable silicon cabinet II are connected in parallel.
On the basis of such scheme, the analog output port of described PLC200 and the analog quantity of main 6RA70 controller
Connected by hardware connection between input port.
On the basis of such scheme, the port 0 of described PLC200 is configured to main website, main 6RA70 controller be configured to from
Stand, by the protocol realization data communication of standard USS.
On the basis of such scheme, described PLC200 is provided with standard Profibus-DP communication interface, it is possible to achieve remote
Process control.
The controllable silicon low-frequency power control system being applied to large power, electrically slag hearth described in the utility model, having following has
Benefit effect:
1, the core of power control system uses the ripe perfect 6RA70 controller of Siemens, utilizes its digitized to shift to
The control characteristic triggered and be exceedingly fast, improves response speed and the control accuracy of power control system, two 6RA70 controllers
Master & slave control exports 12 groups of pulse waves so that the pulsation of electric power output voltage is less, exports more stable, it is ensured that power supply controls system
The control accuracy of system and quickly trigger characteristic and reliability；
2,6RA70 controller and SIEMENS PLC 200 and the combination of touch screen, improve grasping of power control system
The property made, portability and extensibility；
3, open loop in this power control system uses, the control mode of outer closed loop, both ensure that the response speed of system, again
Ensure that the stable output of power control system；
4, in electroslag furnace industry, Large Copacity electroslag furnace uses this low frequency control system, have power supply magnetic interference minimum,
Without advantages such as kelvin effect, power supply control accuracy height, power supply output continuously adjustabe and power factor are high, greatly improve electroslag furnace
The quality of melting iron and steel.
Accompanying drawing explanation
This utility model has a drawings described below:
Fig. 1 is power control system theory diagram；
Fig. 2 is power control system composition frame chart；
Fig. 3 is double narrow pulse waveform figures of Siemens's 6RA70 controller output；
Fig. 4 is the individual pulse row oscillogram of 6RA70 controller output.
Detailed description of the invention
Below in conjunction with accompanying drawing 1 to accompanying drawing 4, this utility model is described in further detail.
A kind of controllable silicon low-frequency power control system being applied to large power, electrically slag hearth, including: main 6RA70 controller, from
6RA70 controller, pulsed drive amplification module I, pulsed drive amplification module II, controllable silicon cabinet, PLC200 and touch screen；
Described controllable silicon cabinet includes controllable silicon cabinet I and controllable silicon cabinet II；
Described touch screen is for realizing setting and the display of controllable silicon low-frequency power control system parameter；
Calculated with actual values output that described PLC200 feeds back for the parameter set according to touch screen and controllable silicon cabinet are given
Definite value；
Described main 6RA70 controller is for the set-point according to PLC200 output and the synchronizing signal of controllable silicon cabinet feedback
Calculate pulse-triggered position and export direct impulse or reverse impulse；
Described pulse position output direct impulse or the reverse impulse following main 6RA70 controller from 6RA70 controller；
Described pulsed drive amplification module I is for carrying out power amplification to the output pulse of main 6RA70 controller；
Described pulsed drive amplification module II is for carrying out power amplification to from the output pulse of 6RA70 controller；
Described controllable silicon cabinet I is for receiving the output pulse of pulsed drive amplification module I, and triggers controllable silicon output forward
Voltage or backward voltage；
Described controllable silicon cabinet II is for receiving the output pulse of pulsed drive amplification module II, and just triggers controllable silicon output
To voltage or backward voltage.
On the basis of such scheme, described PLC200 includes that PID (PID) controls and commutates.
On the basis of such scheme, described PID control is fed back for the parameter setting touch screen and controllable silicon cabinet
Actual value carries out ratio calculating；Commutation is for calculating the commutating frequency of main 6RA70 controller output pulse.
On the basis of such scheme, when described commutating frequency is zero, main 6RA70 controller only exports direct impulse.
On the basis of such scheme, described main 6RA70 controller and between 6RA70 controller use device agreement enter
Row communication, described set-point and the control word receiving main 6RA70 controller from 6RA70 controller.
On the basis of such scheme, described controllable silicon cabinet I and controllable silicon cabinet II are connected in parallel.
On the basis of such scheme, the analog output port of described PLC200 and the analog quantity of main 6RA70 controller
Connected by hardware connection between input port.
On the basis of such scheme, the port 0 of described PLC200 is configured to main website, main 6RA70 controller be configured to from
Stand, by the protocol realization data communication of standard USS.
On the basis of such scheme, described PLC200 is provided with standard Profibus-DP communication interface, it is possible to achieve remote
Process control.
Principal and subordinate's 6RA70 controller in the controllable silicon low-frequency power control system used in this large power, electrically slag hearth can produce
There are 12 groups of positive and negative triggering pulses that digitized is shifted to, by pulsed drive amplification module, 12 groups of positive and negative triggering pulses are carried out
Can trigger controllable silicon after power amplification and export forward and reverse voltage, output frequency 0～5Hz is adjustable, and control core part uses west gate
The 6RA70 controller of two 32 multiprocessors of subsidiary, two controllers use master & slave control, and master controller is responsible for calculating arteries and veins
Rush trigger position and export pulse, following the pulse position output pulse of master controller from controller, thus system has computing
The advantages such as speed is fast, control accuracy is high and control characteristic is fast.This power control system has open loop, loop pressure-stabilizing and closed loop current stabilization
Deng control function, can be applied to 12 arteries and veins rectification circuits in industrial each field voltage and current control, have simultaneously low frequency 0～
5Hz output characteristics.Can be realized setting and the display of power control system parameter by human-computer interaction device's touch screen, power supply controls
The theory diagram of system is as shown in Figure 1.
Meanwhile, the control mode of controllable silicon low-frequency power control system described in the utility model has following three kinds:
1) opened loop control: in power control system, main 6RA70 controller is internal uses opened loop control, according to set-point and
Synchronizing signal, calculates and triggers pulse position, utilize the fast operation of 6RA70 controller, pulsed ultrafast characteristic, it is ensured that
There is in the low-frequency operation of large power, electrically slag hearth the advantages such as useful work is many, smelting heat efficiency is high in the cycle.
2) master & slave control: use the master & slave control of device agreement in 6RA70 controller, will main 6RA70 controller
Set-point and control word are sent to from controller by communication, so that following main 6RA70 from the pulse-triggered of 6RA70 controller
Controller.
3) closed loop control: by touch screen setting voltage or electric current, control system gathers real-time voltage and current simultaneously
Feedback, regulates through PID closed loop in SIEMENS PLC 200 after treatment, calculates output set-point, can be selected by parameter
It is sent to 6RA70 controller: (1) passes through hardware connection, the analog quantity of PLC200 by the either type in following two mode
The analog input port of output port extremely main 6RA70 controller；(2) by USS communication, the port 0 of PLC200 is configured to main
Standing, main 6RA70 controller is configured to slave station, by the protocol realization data communication of standard USS.
The low frequency output of power control system, the program in touch screen setpoint frequency, i.e. PLC200 is according to frequency setting
Value automatically adjusts 6RA70 controller and exports the commutating frequency of forward and reverse pulse, when frequency setting is zero, and the most only output forward arteries and veins
Punching.
Controllable silicon low-frequency power control system described in the utility model uses all-digitized demodulator scheme, public with SIEMENS
The SIMOREG 6RA70 controller that department produces is control core, is aided with S7-200PLC and TP array of touch screen, and power supply controls system
System composition frame chart is as shown in Figure 2.
6RA70 controller uses 32 multiprocessors to control, digitized phase-shifting trigger, and self-adaptive current regulates, has pole
Fast control characteristic, is arranged by inner parameter, and triggering pulse is set to double burst pulse, and the cycle is 20ms, as it is shown on figure 3,
Pulse front edge is relatively steep, and strong interference immunity has and triggers by force performance, it is ensured that controllable silicon can be by fast and reliable ground triggering and conducting.
As shown in Figure 4, it can be seen that about individual pulse row, shake is less than 25us；Every 6RA70 controller is again one four simultaneously
The controller of quadrant, exportable 6 groups of direct impulses or 6 groups of reverse impulses, by 6RA70 controller inner parameter Dead Time
Arrange, it is ensured that the safety and reliability that the commutation of 6RA70 controller runs.
The modular construction of 6RA70 controller, its standard configuration is expanded realizes various high-performance scheme, can complete set
Become in all of automated system.In large power, electrically slag hearth power control system, owing to separate unit 6RA70 controller is only capable of defeated
Go out 6 group pulses, thus at least need to use two 6RA70 controller extension output 12 group pulses.Two 6RA70 controllers use
Master & slave control both can ensure that control speed and the control accuracy of system, and the output electric current that can realize again two controllable silicon cabinets is equal
Weighing apparatus.
Power control system, gets final product output frequency and the setting value of flexible low-frequency power by TP array of touch screen,
And output continuously adjustabe, there is control accuracy high, simple operation.Meanwhile, system provides mark by SIEMENS PLC 200 for client
Quasi-Profibus-DP communication interface, facilitates client to pass through master system and realizes the complete operation to this power control system.
PLC200 in the controllable silicon low-frequency power control system being applied to large power, electrically slag hearth described in the utility model
Have the following characteristics that
1) 14 railway digital amount input, through light-coupled isolation, is reserved as the on-off model collection of system；
2) 10 railway digital amount output, is used as to drive relay or signal lights etc., meets system extension requirement；
3) 6 road analog input, as voltage, the collection of current signal, controls computing for system；
4) 4 programmable analog quantitys 0-10V in tunnel or 4-20mA output, can drive 6RA70 to control by output analog signals
Device processed triggering pulse, or extension instrument etc., for system expanded application.
5) providing a RS485 interface with Profibus-DP agreement, address 0-99 is adjustable, baud rate 0-
12Mbps self adaptation, monitors for consumer remote and controls.
The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.
Claims (9)
1. the controllable silicon low-frequency power control system being applied to large power, electrically slag hearth, it is characterised in that including: main 6RA70
Controller, from 6RA70 controller, pulsed drive amplification module I, pulsed drive amplification module II, controllable silicon cabinet, PLC200 and touch
Touch screen；
Described controllable silicon cabinet includes controllable silicon cabinet I and controllable silicon cabinet II；
Described touch screen is for realizing setting and the display of controllable silicon low-frequency power control system parameter；
Described PLC200 is used for the parameter according to touch screen setting and the calculated with actual values of controllable silicon cabinet feedback and exports set-point；
Described main 6RA70 controller calculates for the synchronizing signal of the set-point according to PLC200 output and controllable silicon cabinet feedback
Pulse-triggered position also exports direct impulse or reverse impulse；
Described pulse position output direct impulse or the reverse impulse following main 6RA70 controller from 6RA70 controller；
Described pulsed drive amplification module I is for carrying out power amplification to the output pulse of main 6RA70 controller；
Described pulsed drive amplification module II is for carrying out power amplification to from the output pulse of 6RA70 controller；
Described controllable silicon cabinet I is for receiving the output pulse of pulsed drive amplification module I, and triggers controllable silicon output forward voltage
Or backward voltage；
Described controllable silicon cabinet II is for receiving the output pulse of pulsed drive amplification module II, and triggers controllable silicon output forward electricity
Pressure or backward voltage.
It is applied to the controllable silicon low-frequency power control system of large power, electrically slag hearth the most as claimed in claim 1, it is characterised in that
Described PLC200 includes PID control and commutation.
It is applied to the controllable silicon low-frequency power control system of large power, electrically slag hearth the most as claimed in claim 2, it is characterised in that
Described PID controls the actual value of the parameter for setting touch screen and controllable silicon cabinet feedback and carries out ratio calculating；Commutation is used for
Calculate the commutating frequency of main 6RA70 controller output pulse.
It is applied to the controllable silicon low-frequency power control system of large power, electrically slag hearth the most as claimed in claim 3, it is characterised in that
When described commutating frequency is zero, main 6RA70 controller only exports direct impulse.
It is applied to the controllable silicon low-frequency power control system of large power, electrically slag hearth the most as claimed in claim 1, it is characterised in that
Described main 6RA70 controller and use device agreement to communicate between 6RA70 controller, described connects from 6RA70 controller
Receive set-point and the control word of main 6RA70 controller.
It is applied to the controllable silicon low-frequency power control system of large power, electrically slag hearth the most as claimed in claim 1, it is characterised in that
Described controllable silicon cabinet I and controllable silicon cabinet II are connected in parallel.
It is applied to the controllable silicon low-frequency power control system of large power, electrically slag hearth the most as claimed in claim 1, it is characterised in that
Between analog output port and the analog input port of main 6RA70 controller of described PLC200 by hardware connection even
Connect.
It is applied to the controllable silicon low-frequency power control system of large power, electrically slag hearth the most as claimed in claim 1, it is characterised in that
The port 0 of described PLC200 is configured to main website, and main 6RA70 controller is configured to slave station, is led to by standard USS protocol realization data
Letter.
It is applied to the controllable silicon low-frequency power control system of large power, electrically slag hearth the most as claimed in claim 1, it is characterised in that
Described PLC200 is provided with standard Profibus-DP communication interface, it is possible to achieve remotely control.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620571517.0U CN205862191U (en) | 2016-06-14 | 2016-06-14 | A kind of controllable silicon low-frequency power control system being applied to large power, electrically slag hearth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620571517.0U CN205862191U (en) | 2016-06-14 | 2016-06-14 | A kind of controllable silicon low-frequency power control system being applied to large power, electrically slag hearth |
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| Publication Number | Publication Date |
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| CN205862191U true CN205862191U (en) | 2017-01-04 |
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| CN201620571517.0U Active CN205862191U (en) | 2016-06-14 | 2016-06-14 | A kind of controllable silicon low-frequency power control system being applied to large power, electrically slag hearth |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190912 Address after: 100034 Beijing city Xicheng District Xishiku Street No. 31 A District Patentee after: BEIJING JINGYI JINGYE ELECTRIC TECHNOLOGY CO., LTD. Address before: 100031 No. 68 Xinhua Street, Beijing, Xicheng District Patentee before: Jingyi Chunshu Rectifier Co., Ltd., Beijing |
|
| TR01 | Transfer of patent right |