CN102354113A - Fuzzy hybrid control method for collecting main pressure systems of multiple coke ovens - Google Patents
Fuzzy hybrid control method for collecting main pressure systems of multiple coke ovens Download PDFInfo
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- CN102354113A CN102354113A CN2011102203702A CN201110220370A CN102354113A CN 102354113 A CN102354113 A CN 102354113A CN 2011102203702 A CN2011102203702 A CN 2011102203702A CN 201110220370 A CN201110220370 A CN 201110220370A CN 102354113 A CN102354113 A CN 102354113A
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Abstract
The invention discloses a fuzzy hybrid control method for collecting main pressure systems of multiple coke ovens, aiming at solving the problem of incapability of control due to large pressure fluctuation of collecting mains of the multiple coke ovens in a coking plant in the steel industry. The fuzzy hybrid control method comprises the steps of: firstly, determining a front suction set value of a horizontal pipe, regulating front suction of the horizontal pipe by adopting the traditional fuzzy hybrid control method combining PID (Proportion Integration Differentiation) control with fuzzy control, wherein the fuzzy control formula is as follows: Kp fuzzy=Kp traditional * delta P*K, the Kp is an amplification coefficient, the delta P is a front suction offset of the horizontal pipe, K is a fuzzy factor; and regulating the pressure of each collecting main by adopting the traditional PID control and fuzzy control combined fuzzy hybrid control method, wherein the fuzzy control formula is as follows: Kp fuzzy=Kp traditional *delta P*K, the Kp is an amplification coefficient, delta P is a pressure offset of each collecting main, K is a fuzzy factor and is generally in a range from 1/2 of dead regions and 1.5/2 of dead regions.
Description
Technical field
The present invention relates to automation control area, more particularly a kind of coke oven collecting main pressure detects, control method.
Background technology
In the steel industry; The coke-oven plant is responsible for carrying coke-oven gas to all coke-oven gas Subscriber Units; Stable and the coke-oven gas performance index of coke-oven gas system; Directly affect the ordinary production of all coke-oven gas Subscriber Units, and important meaning is all arranged for safety in production, coke oven life-span, environmental protection, the recovery of change product.And coke oven collecting main pressure requires accurately to be controlled in 80 ± 20Pa fluctuation range, and adjustable extent is very narrow.The disturbing factor that influences single collecting main pressure is quite a lot of: variation of pressure etc. behind the variation of suction, the fan blower machine before the fluctuation of big ups and downs, coal capacity and the blending ratio of pressure, the transverse tube in variation, the coke pushing of the coal gas generating capacity that each carbonization chamber of coke oven discharges of the coke from coalingging to, the operating process of coalingging; And be subjected to technology, manual operation restriction again seriously, therefore conventional control can't adapt to because the big ups and downs of the collecting main pressure that many Protean disturbing factors cause; Because the shared drum kit cooling system of multistage discharge; Arrange that asymmetric differing with drum cooling system distance causes the suction unreasonable distribution more greatly; When the total suction of certain collecting main pressure big ups and downs in time during balance; Just produced the also coupling phenomenon of big ups and downs of other collecting main pressure, the routine control of therefore total suction can't adapt to owing to the big ups and downs of collecting main pressure system its interference.Because the collecting main pressure system possesses complex characteristics such as non-linear, many disturbances, multivariate, time variation, positive and negative coupling; Therefore the control of many coke oven collecting main pressures is coking industry important research project; If put into operation successfully economic benefit and social benefit highly significant.See that from domestic situation regulate successfully very few, effect is often all undesirable.
Summary of the invention
The present invention seeks to overcoming the deficiency of above-mentioned prior art the fuzzy hybrid control method that is used for many coke oven collecting main pressure systems that provides a kind of many coke oven collecting main pressures in coke-oven plant that solve steel industry to fluctuate big uncontrollable problem.
Because the collecting main pressure system possesses non-linear; Many disturbances; Multivariate; Time variation; Complex characteristics such as positive and negative coupling; Therefore just because of its influence factor is many; So this patent is ignored to all influence factors of each collecting main pressure without exception; And each collecting main pressure employing is mixed control with classical PID control with the fuzzy control combination of fuzzy with modern control thought; From judgement; Self-organization; Multiparameter; Make under various strong jammings, getting back to stable state rapidly; Thereby the therefore ingenious just coupling that weakens suction formation before the transverse tube, the negative coupling that further ingenious elimination forms other collecting main pressures.It is the prerequisite place of whole collecting main pressure system stability that the in good time adjustment of the preceding suction of transverse tube reaches stable; And suction also possesses complex characteristics such as non-linear, many disturbances, multivariate, time variation before the transverse tube; Therefore native system to transverse tube before suction also adopt above-mentioned dimmed mixing controlling schemes to make under various strong jammings, getting back to stable state rapidly; Thereby the ingenious just coupling that weakens collecting main pressure formation, the negative coupling that forms between further each collecting main pressure of ingenious elimination.The inventive method is specifically:
(1) confirm the preceding suction setting value of transverse tube:
When coke oven is normally come out of the stove; The hand-driven return-flow valve that manual shift is positioned on the recirculatory pipe makes it open maximum; Regulating the automatic reflux valve that is positioned on the recirculatory pipe with manual mode on computers opens to 70% it; Regulate fan blower fan blade angle output (to regulate the fan blower revolution) with manual mode on computers again, with the collecting main pressure that guarantees coke oven farthest generally about 80Pa ± 20Pa; Other coke ovens are on computers with manual mode adjustment automatic regulating valve aperture separately, with stable collecting main pressure separately about 80Pa ± 20Pa; Gradually automatic reflux valve is opened to 50%, suction is decided to be the preceding suction setting value of transverse tube before the transverse tube of this moment.The big self-regulating effect that refluxes is stablize suction constantly changes with balance before the transverse tube gas yield, indirect stable set tracheal system, to prevent the fan blower surge.
(2) the fuzzy hybrid control method is regulated the preceding suction of transverse tube:
Adopt traditional PID control and fuzzy control (concrete formula is following) combination of fuzzy mixing control method to regulate the preceding suction of transverse tube, regulate reverse flow valve, divide three kinds of situation according to suction before the transverse tube:
1. under the metastable prerequisite of fan blower revolution, when the suction deviation was in dead zone range before the transverse tube, system did not drop into automatic control, makes its self-stabilization, was equivalent to manually; The suction dead zone range is about 3% of the preceding suction range of transverse tube before the transverse tube.
When 2. the suction deviation surpassed dead zone range and is lower than 2 times of dead zone ranges before the transverse tube, system dropped into PID control automatically;
3. the suction deviation suddenly strengthened when surpassing 2 times of dead zone ranges before the suction deviation surpassed dead zone range and transverse tube before the transverse tube; System drops into fuzzy control automatically; From judgement, self-organization, multiparameter; Automatically regulate amplification coefficient according to deviation; Suction is got back to rapidly on certain amplitude before making transverse tube, continues to drop into PID control more automatically.
The concrete formula of fuzzy control is: Kp blurs=Kp tradition * Δ P * K
Wherein: Kp is an amplification coefficient, and Δ P is a suction deviation before the transverse tube, and K is the fuzzy factor; The K value is generally 1.5 scopes of 1 to 2 times of dead band branch of 2 times of dead band branches; That is: (1-1.5)/2 times dead zone range.
(3) the fuzzy hybrid control method is regulated collecting main pressure;
Adopt traditional PID control and fuzzy control (concrete formula is following) combination of fuzzy mixing control method to regulate collecting main pressure separately, divide three kinds of situation:
When 1. the collecting main pressure deviation was in dead zone range, system did not drop into automatic control, made its self-stabilization, was equivalent to manually; The collecting main pressure dead zone range is about 3% of collecting main pressure range.
When 2. the collecting main pressure deviation surpassed dead zone range and is lower than 2 times of dead zone ranges, system dropped into PID control automatically;
3. the collecting main pressure deviation surpasses dead zone range and the collecting main pressure deviation suddenly strengthens when surpassing 2 times of dead zone ranges; System drops into fuzzy control automatically; From judgement, self-organization, multiparameter; Automatically regulate parameter according to amplitude of variation; Collecting main pressure is got back to rapidly on certain amplitude, continued to drop into PID control more automatically.
The concrete formula of fuzzy control is: Kp blurs=Kp tradition * Δ P * K
Wherein: Kp is an amplification coefficient, and Δ P is the collecting main pressure deviation, and K is the fuzzy factor; The K value is generally 1.5 scopes of 1 to 2 times of dead band branch of 2 times of dead band branches; That is: (1-1.5)/2 times dead zone range.
The state of regulating separately makes its relative amplitude of variation little, and ingenious naturally decoupling zero is simple and easy to realize that this is the adjusting aim of this method.
The inventive method automaticity is high; Control accuracy is high; Be simple and easy to realize; The control reliable and stable; Guarantee the ordinary production of coke-oven plant's ordinary production and all coke-oven gas Subscriber Units, when disturbance occurring, can be transferred to steady state (SS) rapidly; Guarantee the safe operation of whole coke-oven gas system, benefit very significantly.
Embodiment
The inventive method is on probation on three 4.3 meters 65 hole coke ovens of Taiyuan Iron & Steel Group Co., Ltd. coke-oven plant.The label of three coke ovens is respectively 4#, 5#, 6#, is four sections shared cover blower systems of discharge, and wherein the 4# coke oven is that 65 holes are divided into two sections discharges.5#, every of 6# coke oven are 65 holes also, are single discharge.The coke-oven gas of three coke oven generations combines in discharge separately earlier; Behind the manual and automatic twice variable valve on the U type pipe separately, air intake duct; The two-way pipeline of 5#, 6# coke oven converges two-way pipeline through its gas-liquid separator, 4# coke oven and converges through another gas-liquid separator and converge; Through the shared drum kit cooling system of primary cooler, so far the coke-oven gas of three coke oven generations is delivered to rear portion coal-gas recovering cleaning procedure through a drum kit cooling system then.
(1) confirms the preceding suction setting value of transverse tube; When coke oven is normally come out of the stove; At first hand-driven return-flow valve is opened maximum, automatic reflux valve and is manually opened 70%; Manual adjustments fan blower revolution to 4300 rev/min; The in good time manual adjustment control valve opening of each coke oven is with stable collecting main pressure separately; After the collecting main pressure of satisfied coke oven farthest reaches the control requirement, automatic reflux valve was opened at 50% o'clock, it is 1300Pa that the preceding suction of the transverse tube of this moment can be decided to be the preceding suction setting value of transverse tube.
(2) the fuzzy hybrid control method is regulated the preceding suction of transverse tube; Program in the PLC, and establish dead band 50Pa, carry out respectively according to three conditions:
1. suction deviation delta P is in dead zone range before the transverse tube, and system does not drop into automatic control.
2. the suction deviation is in 100Pa before the transverse tube, and system drops into PID control automatically: the Kp tradition is 0.5;
When 3. the suction deviation suddenly strengthened above 100Pa before the transverse tube, system dropped into fuzzy control automatically: with the fuzzy Kp tradition that replaces of Kp, Kp blurs=0.5 * Δ P * 0.01, gets back in the 100Pa, and system drops into PID control again automatically.
(3) the fuzzy hybrid control method is regulated collecting main pressure; Program in the same PLC, and establish dead band 20Pa, carry out respectively according to three conditions:
1. collecting main pressure deviation delta P in dead zone range, system does not drop into automatic control.
2. the collecting main pressure deviation is in 40Pa, and system drops into PID control automatically: the Kp tradition is 0.5;
When 3. the collecting main pressure deviation suddenly strengthened above 40Pa, system dropped into fuzzy control automatically: with the fuzzy Kp tradition that replaces of Kp, Kp blurs=0.5 * Δ P * 0.025, gets back in the 40Pa, and system drops into PID control again automatically.
Be applied to other system, dead band, deviation delta P, Kp tradition, K need to decide according to different on-the-spot process debuggings.
Claims (1)
1. fuzzy hybrid control method that is used for many coke oven collecting main pressure systems is characterized in that:
(1) confirm the preceding suction setting value of transverse tube:
When coke oven is normally come out of the stove; The hand-driven return-flow valve that manual shift is positioned on the recirculatory pipe makes it open maximum; Regulating the automatic reflux valve that is positioned on the recirculatory pipe with manual mode on computers opens to 70% it; Regulate the output of fan blower fan blade angle with manual mode on computers again, with the collecting main pressure that guarantees coke oven farthest at 80Pa ± 20Pa; Other coke ovens are on computers with manual mode adjustment automatic regulating valve aperture separately, with stable collecting main pressure separately about 80Pa ± 20Pa; Gradually automatic reflux valve is opened to 50%, suction is decided to be the preceding suction setting value of transverse tube before the transverse tube of this moment;
(2) the fuzzy hybrid control method is regulated the preceding suction of transverse tube:
Adopt traditional PID control and fuzzy control combination of fuzzy mixing control method to regulate the preceding suction of transverse tube, regulate reverse flow valve, divide three kinds of situation according to suction before the transverse tube:
1. under the metastable prerequisite of fan blower revolution, when the suction deviation was in dead zone range before the transverse tube, system did not drop into automatic control, makes its self-stabilization, was equivalent to manually; The suction dead zone range is about 3% of the preceding suction range of transverse tube before the transverse tube;
When 2. the suction deviation surpassed dead zone range and is lower than 2 times of dead zone ranges before the transverse tube, system dropped into PID control automatically;
3. the suction deviation suddenly strengthened when surpassing 2 times of dead zone ranges before the suction deviation surpassed dead zone range and transverse tube before the transverse tube; System drops into fuzzy control automatically; From judgement, self-organization, multiparameter; Automatically regulate amplification coefficient according to deviation; Suction is got back to rapidly on certain amplitude before making transverse tube, continues to drop into PID control more automatically;
The fuzzy control formula is: Kp blurs=Kp tradition * Δ P * K
Wherein: Kp is an amplification coefficient, and Δ P is a suction deviation before the transverse tube, and K is the fuzzy factor; The K value is usually in 1.5 scopes of 1 to 2 times of dead band branch of 2 times of dead band branches;
(3) the fuzzy hybrid control method is regulated collecting main pressure;
Adopt traditional PID control and fuzzy control combination of fuzzy mixing control method to regulate collecting main pressure separately, divide three kinds of situation:
When 1. the collecting main pressure deviation was in dead zone range, system did not drop into automatic control, made its self-stabilization, was equivalent to manually; The collecting main pressure dead zone range is about 3% of collecting main pressure range;
When 2. the collecting main pressure deviation surpassed dead zone range and is lower than 2 times of dead zone ranges, system dropped into PID control automatically;
3. the collecting main pressure deviation surpasses dead zone range and the collecting main pressure deviation suddenly strengthens when surpassing 2 times of dead zone ranges; System drops into fuzzy control automatically; From judgement, self-organization, multiparameter; Automatically regulate parameter according to amplitude of variation; Collecting main pressure is got back to rapidly on certain amplitude, continued to drop into PID control more automatically;
The fuzzy control formula is: Kp blurs=Kp tradition * Δ P * K
Wherein: Kp is an amplification coefficient, and Δ P is the collecting main pressure deviation, and K is the fuzzy factor; The K value is generally 1.5 scopes of 1 to 2 times of dead band branch of 2 times of dead band branches.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776045A (en) * | 2015-04-23 | 2015-07-15 | 武汉钢铁(集团)公司 | Suction regulation control method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009286983A (en) * | 2008-06-02 | 2009-12-10 | Jfe Steel Corp | Method and device for controlling coke oven collecting pipe pressure |
| CN101885969A (en) * | 2009-05-13 | 2010-11-17 | 中国神华能源股份有限公司 | Gas collector pressure control method |
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2011
- 2011-07-30 CN CN2011102203702A patent/CN102354113A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009286983A (en) * | 2008-06-02 | 2009-12-10 | Jfe Steel Corp | Method and device for controlling coke oven collecting pipe pressure |
| CN101885969A (en) * | 2009-05-13 | 2010-11-17 | 中国神华能源股份有限公司 | Gas collector pressure control method |
Non-Patent Citations (2)
| Title |
|---|
| 李壮举等: "基于模糊PD的焦炉集气管压力控制系统研究", 《冶金设备》 * |
| 赖旭芝等: "焦炉集气管的模糊专家控制方法及其应用", 《控制工程》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776045A (en) * | 2015-04-23 | 2015-07-15 | 武汉钢铁(集团)公司 | Suction regulation control method |
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Application publication date: 20120215 |