CN102676713A - Feedforward feedback simulation method for TRT (Top Gas Pressure Recovery Turbine unit) blast furnace top pressure control stamping process and system therefor - Google Patents
Feedforward feedback simulation method for TRT (Top Gas Pressure Recovery Turbine unit) blast furnace top pressure control stamping process and system therefor Download PDFInfo
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Abstract
The invention provides a feedforward feedback simulation method for a TRT blast furnace top pressure control stamping process. Through establishing a feedforward feedback simulation system and utilizing a simulation method for the blast furnace stamping process, the rating curve of a stationary guide blade is utilized in advance for feedforward control of the opening degree of the stationary guide blade during stamping, the set value of the top pressure and the feedback value are compared, a controlled variable is output for feedback control of the stationary guide blade, and commissioning in the simulation system can ensure a more reasonable control scheme, so that the influence of direct online testing of different control schemes on the normal operation of the blast furnace can be avoided.
Description
Technical field
The present invention relates to TRT blast furnace roof pressure control field in the metallurgy industry.
Background technology
TRT is the abbreviation of Top Gas Pressure Recovery Turbine unit, is known as blast furnace gas excess pressure power generating device, and the HTHP coal gas that it utilizes blast furnace to produce promotes turbine, and then drives generator for electricity generation.According to statistics, the energy of 30%-40% in the recyclable blast furnace gas of TRT.Compare with the reducing valve group that blast furnace is traditional, can better stablize the blast furnace roof pressure, also reduced the sound pollution that the reducing valve group is brought greatly.TRT can not only bring huge economic benefit for iron and steel enterprise, also is the mark post engineering of energy-saving and emission-reduction simultaneously.Typical TRT technical process is shown in accompanying drawing 1.
TRT is in the process of control blast furnace roof pressure; Following of normal circumstances needs conventional PID can stablize the blast furnace roof pressure preferably, but blast furnace can cause the intensive disturbance to the blast furnace roof pressure when punching press, only depends on this moment conventional PID control can not the roof pressure fluctuation be maintained a small range; Certainly will produce certain influence to the ordinary production of blast furnace like this; But the better controlled scheme does not solve the influence of punching course to top pressure at present, and if the particular requirements such as continuity of producing owing to blast furnace simultaneously are slip-stick artist's on-line testing Different control scheme; Then be certain to the influence bigger, even the consequence of various hazardous takes place the normal generation of blast furnace.
Summary of the invention
The technical problem that the present invention will solve is: a kind of TRT blast furnace roof pressure control punching press feedforward emulation mode and system are provided, can in analogue system, debug, avoid directly on production line, testing impacting.
The present invention solves the problems of the technologies described above the technical scheme of being taked to be: a kind of TRT blast furnace roof pressure control punching course feedforward feedback emulation mode, and it is characterized in that: it may further comprise the steps:
1) to each integral part of TRT system, sets up each parts class emulation module respectively, and be each parts class emulation module editor and design variable, interface;
2) interface through each parts class emulation module connects parts class emulation module by actual TRT system, and regulates each module parameter and make system reach stable state;
3) characteristics and the control method of the actual TRT of analysis system punching course increase by 3 program class emulation modules, are respectively punching press interference module, feed forward control module and PID feedback control module; The punching press interference module is used for the influence of emulation punching course to the blast furnace roof pressure; The feed forward control module is used for when punching press, utilizing in advance the rating curve control stator blade aperture of stator blade; The PID feedback control module is used for that roof pressure set(ting)value and value of feedback are compared and export manipulated variable stator blade is controlled;
Described feed forward control module goes out to flow into the punching press jar according to the pressure reduction before and after the ram valve and gas flow coefficient calculations when punching press gas flow; Simultaneously calculate stator blade institute to aperture that should gas flow, when punching press, utilize the rating curve of stator blade to control the stator blade aperture in advance according to the rating curve of stator blade;
The PID feedback control module top pressure setting
and the feedback value
Compare constitute control deviation
:
Again in proportion, constitute manipulated variable u (t) through linear combination behind the differential, integral operation with controlled deviation
:
In the formula (2); U (t) is a manipulated variable;
is the ratio control gain;
is integration time constant;
is derivative time constant, and t is the time;
4) the system emulation parameter is set, carries out simulation calculating.
Press such scheme, the parts class emulation module in the said step 1) comprises:
Border A: be the first level pressure node, simulation gets into the pressure of the hot blast of blast furnace;
Pipeline A: comprise a pipe joint road, every pipe joint road comprises the fixedly valve and a container of aperture;
Bf model: comprise upper container and following container, connect by first variable valve between upper container and the following container; The aperture of first variable valve is a fixed value;
Pipeline B: comprise b pipe joint road, every pipe joint road comprises the fixedly valve and a container of aperture;
Stator blade: comprise second variable valve, the aperture of second variable valve is by the manipulated variable u (t) and the feed forward control module controls of described PID feedback control module output;
Boundary B: be the second level pressure node, simulation is through the pipe network gas pressure after the stator blade;
Ram valve: the switch of ram valve is controlled by described punching press interference module;
Punching press jar: comprise a container;
Border A, pipeline A, bf model, pipeline B, stator blade are connected with boundary B in order, tell a branch between pipeline B and the stator blade and are connected with ram valve, and the other end of ram valve is connected with the punching press jar;
Roof pressure set(ting)value in the PID feedback control module
is confirmed by the technology specialty; Value of feedback
is actual measured blast furnace roof pressure value, i.e. upper container force value in the bf model.
Press such scheme, specifically control scheme of said step 3) feed forward control module is:
If the pipeline pressure before the ram valve is
; Punching press jar internal pressure is
; The pressure reduction of
and
is
and
, at first calculates the gas flow
that flows into the punching press jar according to pressure reduction
:
Wherein
is orifice coefficient, and be relevant with the form of ram valve;
Rating curve according to this gas flow
and stator blade calculates the pairing aperture of stator blade then, controls the stator blade aperture in advance.
Press such scheme, it comprises that also step 5) compares simulation result and desired result, the system emulation parameter is debugged, to obtain optimization control parameter.
A kind of TRT blast furnace roof pressure control punching course feedforward feedback analogue system, it is characterized in that: it comprises parts generic module and program generic module;
Wherein the parts generic module comprises:
Border A: be the first level pressure node, simulation gets into the pressure of the hot blast of blast furnace;
Pipeline A: comprise a pipe joint road, every pipe joint road comprises the fixedly valve and a container of aperture;
Bf model: comprise upper container and following container, connect by first variable valve between upper container and the following container; The aperture of first variable valve is a fixed value;
Pipeline B: comprise b pipe joint road, every pipe joint road comprises the fixedly valve and a container of aperture;
Stator blade: comprise second variable valve, the aperture of second variable valve is by described feed forward control module controls;
Boundary B: be the second level pressure node, simulation is through the pipe network gas pressure after the stator blade;
Ram valve: the switch of ram valve is by the manipulated variable u (t) and the feed forward control module controls of described PID feedback control module output;
Punching press jar: comprise a container;
Border A, pipeline A, bf model, pipeline B, stator blade are connected with boundary B in order, tell a branch between pipeline B and the stator blade and are connected with ram valve, and the other end of ram valve is connected with the punching press jar;
The program generic module comprises:
The punching press interference module is used for the influence of emulation punching course to the blast furnace roof pressure;
The feed forward control module is used for when punching press, utilizing in advance the rating curve control stator blade aperture of stator blade; When punching press according to the gas flow of the pressure reduction before and after the ram valve with gas flow coefficient calculations inflow punching press jar; Simultaneously calculate stator blade institute to aperture that should gas flow, when punching press, utilize the rating curve of stator blade to control the stator blade aperture in advance according to the rating curve of stator blade;
The PID feedback control module is used for that roof pressure set(ting)value and value of feedback are compared and export manipulated variable to be controlled stator blade, roof pressure set(ting)value
and value of feedback
is compared constitute controlled deviation
:
Again in proportion, constitute manipulated variable u (t) through linear combination behind the differential, integral operation with controlled deviation
:
In the formula (2); U (t) is a manipulated variable;
is the ratio control gain;
is integration time constant;
is derivative time constant, and t is the time.
Press such scheme, it is based on, and the Modelica language sets up.
Beneficial effect of the present invention is:
1, through the blast furnace punching course being set up the feedforward feedback analogue system and being used emulation mode; Through in analogue system, debugging; To confirm more reasonably to control scheme, avoid direct-on-line test Different control scheme, to the influence of the normal generation of blast furnace.
2, select for use the Modelica language to set up this analogue system; Compare with other modeling softwares; Can be convenient carry out modeling to physical system, and can be well this finds the solution the tight coupling parameter to flow, pressure, thereby can more truly, comprehensively reflect the running condition of TRT system.
Description of drawings
Fig. 1 is typical TRT process flow diagram.
Fig. 2 is a TRT blast furnace roof pressure control model diagram.
Fig. 3 is the punching course roof pressure curve of cyclical fluctuations.
Top pressure set(ting)value and process values curve when Fig. 4 controls for feedforward feedback.
Stator blade operation curve when Fig. 5 controls for feedforward feedback.
Fig. 6 is the feedback control schema.
Fig. 7 is PID feedback control module physical model figure.
Fig. 8 is the feed forward control schema.
Embodiment
Fig. 2 is a TRT blast furnace roof pressure control model diagram; It is the topological framework of whole TRT simplifying model; Border A produces a stable gas flow, gets into blast furnace through piping A, and gas flows out from furnace roof through the bed of material in blast furnace; And, flow out to boundary B at last through the stator blade in segment length's pipeline B inflow turbine; Before stator blade, there is a lateral to be connected to the punching press jar; On the pipeline between stator blade and the punching press jar ram valve is housed; Because ram valve is opened, when closing the blast furnace gas flow is had bigger influence, so the time that top pressure can be opened, close along with ram valve and ram valve is opened generation fluctuation.Native system and method will be simulated the influence of the switch of ram valve to the blast furnace roof pressure just, through attempting the Different control scheme to the stator blade aperture, make the fluctuation of blast furnace roof pressure minimum, utilize to actual production line after in native system, obtaining verifying again.
Blast furnace is divided into up and down two spaces by the bed of material, can equivalence be two airtight large containers, i.e. upper container and following container, and the bed of material can equivalence be a valve then, promptly first variable valve in punching course, can think that the aperture of first variable valve is a fixed value.Because there are pressure reduction in pipeline pressure (being the pressure that Q is ordered among Fig. 2) and punching press jar internal pressure before the ram valve; Cause the effusive gas flow of furnace roof to increase so can the furnace roof blast furnace gas be introduced batch can after ram valve is opened; If this moment, stator blade kept aperture before, then can cause top pressure to descend, therefore need when punching press, control the stator blade aperture; Reduce from the effusive blast furnace gas of stator blade, make the effusive gas flow of furnace roof steady relatively.
For actual TRT, the blast furnace furnace roof will have the pipeline of hundreds of rice to stator blade, so pass through stator blade and regulate tangible large time delay of top pressure existence.For the coal gas transmission pipeline, because pipeline is longer, total system there are two influences, the one, the crushing of coal gas in pipeline transmission, the 2nd, because coal gas is coercible gas, long pipeline plays a buffered effect in whole fluid system.For an independent container, be a first-order system, and pipeline B is not a straight pipeline; Directly equivalence is a large container; The centre has some resistance elements, and native system is that several vessels is middle across resistance element with its equivalence, forms a high order system.
1997, Modelica association of Sweden non-profit organization developed a kind of object oriented language Modelica that is applicable to large-scale complex isomery physics system modelling.Modelica is known as unified object-oriented physical system modeling language, adopts uniform way to describe to the system from different field, has thoroughly realized the seamless integrated and data exchange between the different field model.
The core of Modelica emulational language is an equation; It utilizes equation that various physical phenomenons are described; The slip-stick artist need not the too much simulation algorithm of paying close attention to; Only need to carry out math equation to the object that needs emulation and describe, utilize the emulation tool of Modelica that each simulation object is coupled together, how relevant Modelica instrument can determine automatic calculation equation variable; Need not manual intervention, so the process that finally the physical object process of simulation is just developed and for emulation tool large-scale system of equations found the solution.
The TRT blast furnace roof pressure control punching course feedforward feedback analogue system of present embodiment is set up based on the Modelica language, and it comprises parts generic module and program generic module.
Wherein the parts generic module comprises:
Border A: be the first level pressure node P
A, be used to simulate the pressure of the hot blast that gets into blast furnace; Be generally steady state value, P is set in the present embodiment
A=300kPa.
Pipeline A: comprise a pipe joint road, every pipe joint road comprises the fixedly valve and a container of aperture; A=3 in the present embodiment.
Bf model: comprise upper container and following container, connect by first variable valve between upper container and the following container; The aperture of first variable valve is set, and the aperture of first valve is fixed as 70% in the present embodiment.
Pipeline B: comprise b pipe joint road, every pipe joint road comprises the fixedly valve and a container of aperture; B=2 in the present embodiment.
Stator blade: comprise second variable valve, the aperture of second variable valve is by the manipulated variable u (t) and the feed forward control module controls of described PID feedback control module output.
Boundary B: be the second level pressure node P
B, simulation is through the pipe network gas pressure after the stator blade, and this value is a steady state value basically, and P is set in the present embodiment
B=100kPa.
Ram valve: the open and close of ram valve and switching time are controlled by described punching press interference module.
Punching press jar: comprise a container.
Border A, pipeline A, bf model, pipeline B, stator blade are connected with boundary B in order, before stator blade, have a lateral to be connected to the punching press jar, on the pipeline between stator blade and the punching press jar ram valve are housed.
When concrete modular design, for the design of container:
Container is cylindrical; Its diameter is
; Highly be
; This Vessel Design has two interfaces; An import
; An outlet
; Connect before and after being used for; Each interface inside all comprises two variablees; Flow
and pressure
, this interface produce automatically when being connected with the front and back module and connect equation.Container model inside has following equation:
1) inlet and outlet pressure equates:
;
2) import and export the variable quantity
that difference in flow equals container inner pressure.
In the following formula;
is intake pressure;
is top hole pressure;
is inlet flow rate;
is rate of discharge, and
is that container inner pressure is poor.
For pipeline, why be thought of as the form that valve adds container and simulate the characteristic of pipeline, be because gas has compressive characteristics, except the pressure-losses is arranged, long pipeline also has a buffered effect to gas when in long pipeline, flowing.Therefore consider to add the fixedly valve of aperture; Be used for the crushing that analog gas flows and produced at pipeline; The formula of reduction of crushing is
, and container then has the buffered effect.
is the pipeline crushing; K is the flow correction coefficient, and q is a flow.
As stated above, the physical size according to each parts class emulation module designs them respectively with requiring.
The program generic module comprises:
The punching press interference module is used for the influence of emulation punching course to the blast furnace roof pressure, the switch of control ram valve.When stable state, add the interference (not adding PID feedback control and feed forward control) of punching course, the top pressure fluctuation is as shown in Figure 3.Punching course is opened ram valve since 100s, when 500s, closes ram valve, and the aperture when whole process stator blade aperture remains on stable state is constant, and the 206kPa of top pressure during by stable state reduces to 193kPa, and 13kPa has descended.This simulation result is used for comparing with the simulation result that adds PID feedback control and feed forward control.
The PID feedback control module, figure is as shown in Figure 7 for its physical model, is used for that roof pressure set(ting)value and value of feedback are compared and export manipulated variable stator blade is controlled.
Where PID feedback control module will top pressure setting value
and the feedback value
Compare constitute control deviation
:
Again in proportion, constitute manipulated variable u (t) through linear combination behind the differential, integral operation with controlled deviation
:
In the formula (2); U (t) is a manipulated variable;
is the ratio control gain;
is integration time constant;
is derivative time constant, and t is the time;
Roof pressure set(ting)value in the PID feedback control module
is confirmed by the technology specialty; Value of feedback
is actual measured blast furnace roof pressure value, i.e. upper container force value in the bf model; Manipulated variable u (t) is used to control the aperture of second variable valve.
The feed forward control module is used for when punching press, utilizing in advance the rating curve control stator blade aperture of stator blade; Because the blast furnace punching press belongs to the interference that can foresee in advance, aperture that therefore in theory can be through the analysis of punching course being controlled in advance stator blade is to eliminate the influence of punching press to the blast furnace roof pressure.When punching press according to the gas flow of the pressure reduction before and after the ram valve with gas flow coefficient calculations inflow punching press jar; Simultaneously according to the rating curve of stator blade calculate stator blade to aperture that should gas flow; When punching press, utilize the rating curve control stator blade aperture of stator blade in advance, then can well eliminate the influence of punching course top pressure.
Suppose that preceding pipeline pressure is
to ram valve; Punching press jar internal pressure is
; Because there is pressure reduction
(
) in
and
; Cause the effusive gas flow of furnace roof to increase so can the furnace roof blast furnace gas be introduced batch can after ram valve is opened; If this moment, stator blade kept aperture before; Then can cause top pressure to descend; Therefore need when punching press, control the stator blade aperture in advance; Reduce from the effusive blast furnace gas of stator blade, make the effusive gas flow of furnace roof steady relatively.
First, according to pressure
calculate the inflow stamping tank gas flow
:
Wherein
is orifice coefficient, and be relevant with the form of ram valve;
Rating curve according to this gas flow
and stator blade calculates the pairing aperture of stator blade then, controls the stator blade aperture in advance.
TRT blast furnace roof pressure control punching course feedforward feedback emulation mode may further comprise the steps:
1) to each integral part of TRT system, sets up each parts class emulation module respectively, and be each parts class emulation module editor and design variable, interface.
2) interface through each parts class emulation module connects parts class emulation module by actual TRT system, and regulates each module parameter and make system reach stable state.
3) characteristics and the control method of the actual TRT of analysis system punching course increase by 3 program class emulation modules, are respectively punching press interference module, feed forward control module and PID feedback control module; The punching press interference module is used for the influence of emulation punching course to the blast furnace roof pressure; The feed forward control module is used for when punching press, utilizing in advance the rating curve control stator blade aperture of stator blade; The PID feedback control module is used for that roof pressure set(ting)value and value of feedback are compared and export manipulated variable stator blade is controlled;
Described feed forward control module controls schema is as shown in Figure 8; The gas flow that when punching press, goes out to flow into the punching press jar according to the pressure reduction before and after the ram valve and gas flow coefficient calculations; Simultaneously calculate stator blade institute to aperture that should gas flow, when punching press, utilize the rating curve of stator blade to control the stator blade aperture in advance according to the rating curve of stator blade.
Described PID feedback control module control flow chart is as shown in Figure 6, roof pressure set(ting)value
and value of feedback
is compared constitute controlled deviation
:
Again in proportion, constitute manipulated variable u (t) through linear combination behind the differential, integral operation with controlled deviation
:
In the formula (2); U (t) is a manipulated variable;
is the ratio control gain;
is integration time constant;
is derivative time constant, and t is the time.
4) the system emulation parameter is set, carries out simulation calculating.
5) simulation result and desired result are compared; The system emulation parameter is debugged; To obtain optimization control parameter; Specifically: the top pressure actual value and its set(ting)value that compare the upper container of bf model; Be value of feedback
and roof pressure set(ting)value
; Pid parameter and/or feedforward making time are debugged, made the process values of blast furnace roof pressure more near its set(ting)value.
Before PID drops into control, at first need the tuning PID parameter, several different methods tuning PID parameter is arranged in theory, but maximum examination method of still gathering of in actual engineering, using.The examination method of gathering is under the prerequisite that system allows; Through the response curve (like step response) of operation with closed ring viewing system,, gather the examination parameter repeatedly then according to of the roughly influence of each adjusting parameter to system response; Reaching satisfied system response, thereby confirm pid parameter.Generally take first ratio, back integration, the whole step of differential again.PID control does not need three whole participation controls under a lot of situations, but can change control strategy flexibly and easily, implements P, PI, PD or PID control, and what native system adopted is that PI controls.
After finishing, parameter tuning can move The model; Begin punching press at 100s in the present embodiment; Feed forward control begins to reduce stator blade aperture (this time can be made corresponding adjustment according to practical situation) at 80s in advance; And punching press finishes when 500s, and then ram valve will be closed, so stator blade recovers aperture (this time can be made corresponding adjustment according to practical situation) in advance at 450s; Adopt PID control simultaneously.Roof pressure fluctuation and stator blade operation curve such as Fig. 4, shown in Figure 5 after regulating, as can be seen from the figure, blast furnace roof pressure error is+0.4/-0.4kPa in the whole regulate process, stator blade aperture scope is between 28% ~ 52%.
Claims (6)
1. a TRT blast furnace roof pressure is controlled punching course feedforward feedback emulation mode, and it is characterized in that: it may further comprise the steps:
1) to each integral part of TRT system, sets up each parts class emulation module respectively, and be each parts class emulation module editor and design variable, interface;
2) interface through each parts class emulation module connects parts class emulation module by actual TRT system, and regulates each module parameter and make system reach stable state;
3) characteristics and the control method of the actual TRT of analysis system punching course increase by 3 program class emulation modules, are respectively punching press interference module, feed forward control module and PID feedback control module; The punching press interference module is used for the influence of emulation punching course to the blast furnace roof pressure; The feed forward control module is used for when punching press, utilizing in advance the rating curve control stator blade aperture of stator blade; The PID feedback control module is used for that roof pressure set(ting)value and value of feedback are compared and export manipulated variable stator blade is controlled;
Described feed forward control module goes out to flow into the punching press jar according to the pressure reduction before and after the ram valve and gas flow coefficient calculations when punching press gas flow; Simultaneously calculate stator blade institute to aperture that should gas flow, when punching press, utilize the rating curve of stator blade to control the stator blade aperture in advance according to the rating curve of stator blade;
The PID feedback control module top pressure setting
and the feedback value
Compare constitute control deviation
:
Again in proportion, constitute manipulated variable u (t) through linear combination behind the differential, integral operation with controlled deviation
:
（2），
In the formula (2); U (t) is a manipulated variable;
is the ratio control gain;
is integration time constant;
is derivative time constant, and t is the time;
4) the system emulation parameter is set, carries out simulation calculating.
2. TRT blast furnace roof pressure control punching course feedforward feedback emulation mode according to claim 1, it is characterized in that: the parts class emulation module in the said step 1) comprises:
Border A: be the first level pressure node, simulation gets into the pressure of the hot blast of blast furnace;
Pipeline A: comprise a pipe joint road, every pipe joint road comprises the fixedly valve and a container of aperture;
Bf model: comprise upper container and following container, connect by first variable valve between upper container and the following container; The aperture of first variable valve is a fixed value;
Pipeline B: comprise b pipe joint road, every pipe joint road comprises the fixedly valve and a container of aperture;
Stator blade: comprise second variable valve, the aperture of second variable valve is by the manipulated variable u (t) and the feed forward control module controls of described PID feedback control module output;
Boundary B: be the second level pressure node, simulation is through the pipe network gas pressure after the stator blade;
Ram valve: the switch of ram valve is controlled by described punching press interference module;
Punching press jar: comprise a container;
Border A, pipeline A, bf model, pipeline B, stator blade are connected with boundary B in order, tell a branch between pipeline B and the stator blade and are connected with ram valve, and the other end of ram valve is connected with the punching press jar;
Roof pressure set(ting)value in the PID feedback control module
is confirmed by the technology specialty; Value of feedback
is actual measured blast furnace roof pressure value, i.e. upper container force value in the bf model.
3. TRT blast furnace roof pressure control punching course feedforward feedback emulation mode according to claim 1, it is characterized in that: specifically control scheme of said step 3) feed forward control module is:
Suppose that preceding pipeline pressure is
to ram valve; Punching press jar internal pressure is
; The pressure reduction of
and
is
and
, at first calculates the gas flow
that flows into the punching press jar according to pressure reduction
:
Wherein
is orifice coefficient, and be relevant with the form of ram valve;
Rating curve according to this gas flow
and stator blade calculates the pairing aperture of stator blade then, controls the stator blade aperture in advance.
4. TRT blast furnace roof pressure control punching course feedforward feedback emulation mode according to claim 1, it is characterized in that: it comprises that also step 5) compares simulation result and desired result, the system emulation parameter is debugged, to obtain optimization control parameter.
5. a TRT blast furnace roof pressure is controlled punching course feedforward feedback analogue system, and it is characterized in that: it comprises parts generic module and program generic module;
Wherein the parts generic module comprises:
Border A: be the first level pressure node, simulation gets into the pressure of the hot blast of blast furnace;
Pipeline A: comprise a pipe joint road, every pipe joint road comprises the fixedly valve and a container of aperture;
Bf model: comprise upper container and following container, connect by first variable valve between upper container and the following container; The aperture of first variable valve is a fixed value;
Pipeline B: comprise b pipe joint road, every pipe joint road comprises the fixedly valve and a container of aperture;
Stator blade: comprise second variable valve, the aperture of second variable valve is by described feed forward control module controls;
Boundary B: be the second level pressure node, simulation is through the pipe network gas pressure after the stator blade;
Ram valve: the switch of ram valve is by the manipulated variable u (t) and the feed forward control module controls of described PID feedback control module output;
Punching press jar: comprise a container;
Border A, pipeline A, bf model, pipeline B, stator blade are connected with boundary B in order, tell a branch between pipeline B and the stator blade and are connected with ram valve, and the other end of ram valve is connected with the punching press jar;
The program generic module comprises:
The punching press interference module is used for the influence of emulation punching course to the blast furnace roof pressure;
The feed forward control module is used for when punching press, utilizing in advance the rating curve control stator blade aperture of stator blade; When punching press according to the gas flow of the pressure reduction before and after the ram valve with gas flow coefficient calculations inflow punching press jar; Simultaneously calculate stator blade institute to aperture that should gas flow, when punching press, utilize the rating curve of stator blade to control the stator blade aperture in advance according to the rating curve of stator blade;
The PID feedback control module is used for that roof pressure set(ting)value and value of feedback are compared and export manipulated variable to be controlled stator blade, roof pressure set(ting)value
and value of feedback
is compared constitute controlled deviation
:
Again in proportion, constitute manipulated variable u (t) through linear combination behind the differential, integral operation with controlled deviation
:
In the formula (2); U (t) is a manipulated variable;
is the ratio control gain;
is integration time constant;
is derivative time constant, and t is the time.
6. TRT blast furnace roof pressure according to claim 5 control punching course feedforward feedback analogue system is characterized in that: it is based on, and the Modelica language sets up.
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|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107299168A (en) * | 2017-08-04 | 2017-10-27 | 北京首钢股份有限公司 | A kind of method and device of control blast furnace top pressure |
| CN110106298A (en) * | 2019-04-23 | 2019-08-09 | 宣化钢铁集团有限责任公司 | Improve the stable and safe control method of blast furnace top pressure |
| CN111665877A (en) * | 2020-06-18 | 2020-09-15 | 北京七星华创流量计有限公司 | Pressure control method and device and photovoltaic equipment |
| CN115354096A (en) * | 2022-08-18 | 2022-11-18 | 中天钢铁集团有限公司 | TRT stationary blade control method and system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107299168A (en) * | 2017-08-04 | 2017-10-27 | 北京首钢股份有限公司 | A kind of method and device of control blast furnace top pressure |
| CN110106298A (en) * | 2019-04-23 | 2019-08-09 | 宣化钢铁集团有限责任公司 | Improve the stable and safe control method of blast furnace top pressure |
| CN111665877A (en) * | 2020-06-18 | 2020-09-15 | 北京七星华创流量计有限公司 | Pressure control method and device and photovoltaic equipment |
| CN111665877B (en) * | 2020-06-18 | 2023-04-14 | 北京七星华创流量计有限公司 | Pressure control method and device and photovoltaic equipment |
| CN115354096A (en) * | 2022-08-18 | 2022-11-18 | 中天钢铁集团有限公司 | TRT stationary blade control method and system |
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| CN102676713B (en) | 2014-03-12 |
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