CN103216826A - Main steam pressure self-adaptive predictor of generator set of circulating fluidized bed boiler - Google Patents
Main steam pressure self-adaptive predictor of generator set of circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN103216826A CN103216826A CN2013101118006A CN201310111800A CN103216826A CN 103216826 A CN103216826 A CN 103216826A CN 2013101118006 A CN2013101118006 A CN 2013101118006A CN 201310111800 A CN201310111800 A CN 201310111800A CN 103216826 A CN103216826 A CN 103216826A
- Authority
- CN
- China
- Prior art keywords
- module
- input
- output
- steam pressure
- main steam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Feedback Control In General (AREA)
Abstract
The invention discloses a main steam pressure self-adaptive predictor of a generator set of a circulating fluidized bed boiler, which solves the problem that the stable control of the main steam pressure of the generator set of the circulating fluidized bed boiler is difficult to realize. A gain self-adaptive Smith predictor is constructed according to the Smith prediction principle, by utilizing the total coal supply quantity, the actual main steam pressure, and the opening of a control valve of a steam engine of the boiler as three input variables of the Smith predictor, the output of the predictor serves as predicted main steam pressure of the generator set, and a deviation between a predicted main steam pressure value and a main steam pressure set value is calculated and used as an input deviation of a master control PID of the boiler in coordination control. In a steady state, the predicted main steam pressure is equal to the actual main steam pressure, in a dynamic state, the predicted main steam pressure integrates a value of the influence of the total coal supply quantity of the generator set and the opening of the control valve of the steam engine on the main steam pressure, and under variable loads, due to the changes of the total coal supply quantity and the opening of the control valve of the steam engine, the input deviation of the master control PID of the boiler is timely eliminated, so that the master control of the boiler rapidly enters a new stable state.
Description
Technical field
The present invention relates to a kind of automaton, particularly a kind of main vapour pressure auto-adaptive estimate device of CFBB generating set is applied to that self adaptation is carried out in the boiler combustion of CFBB generating set and regulates control.
Background technology
Along with the raising of expanding economy and people's level of consumption, the proportion of household electricity is strengthening gradually, wherein has in the generating equipment installed capacity to be thermal power generation more than 75%, and coal is more and more higher as the consumption of primary energy.CFBB more and more is subject to people's attention as a kind of thermal power generation boiler of cleaning, and the use of Circulating Fluidized Bed Boilers is also more and more.But the combustion system of CFBB is the nonlinear system of a large time delay, close coupling, and it is serious to interact between each variable, and especially the hysteresis of CFBB stress reaction is bigger, makes the stable control of unit main vapour pressure be difficult to realize.
Summary of the invention
The invention provides a kind of main vapour pressure auto-adaptive estimate device of CFBB generating set, solved the technical problem that the stable control of the main vapour pressure of CFBB generating set is difficult to realize.
A kind of main vapour pressure auto-adaptive estimate device of CFBB generating set comprises addition module, subtraction block, multiplier module, division module, function module, one order inertia module and time delay module, the input s of subtraction block M4
1Main vapour pressure with the CFBB generating set
PT connects, the input s of the first function module M1
1Steam turbine pitch μ with the CFBB generating set
tConnect, the output of the first function module M1 respectively with the input s of subtraction block M4
2Input s with addition module M12
2Connect the input s of the output of subtraction block M4 and division module M5
1Connect the input s of the first multiplier module M3
1Guo Lu Give coal amount with the CFBB generating set
BT connects, the input s of the output of ratio module M2 and the first multiplier module M3
2Connect the input s of the output of the first multiplier module M3 and the second one order inertia module M7
1Connect the input s of the second one order inertia module M7
2Be connected the input s of the output of the second one order inertia module M7 and the 3rd one order inertia module M8 with switching signal
1Connect the input s of the 3rd one order inertia module M8
2Be connected with switching signal, the output of the 3rd one order inertia module M8 respectively with the input s of time delay module M9
1Input s with the second multiplier module M11
2Connect the input s of time delay module M9
2Be connected the input s of the output of time delay module M9 and the 4th one order inertia module M10 with switching signal
1Connect the input s of the 4th one order inertia module M10
2Be connected the input s of the output of the 4th one order inertia module M10 and division module M5 with switching signal
2Connect, the output of division module M5 is connected with the input of the first one order inertia module M6, the input s of the output of the first one order inertia module M6 and the second multiplier module M11
1Connect the input s of the output of the second multiplier module M11 and addition module M12
1Connect the output of addition module M12
P 1Be connected with boiler master pressure set points module.
Be connected with the boiler master PID controller module of CFBB generating set on the described boiler master pressure set points module.
The present invention constructs a gain-adaptive prediction device, model as simulation loop fluidized-bed combustion boiler combustion characteristics, utilize boiler Zong Give coal amount, actual main vapour pressure and steam turbine pitch aperture as three input variables of prediction device, this prediction device output is unit and estimates main vapour pressure, and this estimates main vapour pressure and the main vapour pressure setting value asks deviation as the input deviation of coordinating boiler master PID in the control.This estimates pressure and equals actual main vapour pressure under stable state, dynamically estimating pressure superposition Zong Give coal amount and steam turbine pitch aperture value down to the main vapour pressure influence, when varying duty because the variation of total coal-supplying amount and steam turbine pitch aperture, the input deviation of boiler master PID is changed timely, make boiler master enter new stable state very soon, thereby realize the steady control of main vapour pressure.
Description of drawings
Fig. 1 is a structured flowchart of the present invention.
The specific embodiment
A kind of main vapour pressure auto-adaptive estimate device of CFBB generating set comprises addition module, subtraction block, multiplier module, division module, function module, one order inertia module and time delay module, the input s of subtraction block M4
1Main vapour pressure with the CFBB generating set
PT connects, the input s of the first function module M1
1Steam turbine pitch μ with the CFBB generating set
tConnect, the output of the first function module M1 respectively with the input s of subtraction block M4
2Input s with addition module M12
2Connect the input s of the output of subtraction block M4 and division module M5
1Connect the input s of the first multiplier module M3
1Guo Lu Give coal amount with the CFBB generating set
BT connects, the input s of the output of ratio module M2 and the first multiplier module M3
2Connect the input s of the output of the first multiplier module M3 and the second one order inertia module M7
1Connect the input s of the second one order inertia module M7
2 withSwitching signal connects, the input s of the output of the second one order inertia module M7 and the 3rd one order inertia module M8
1Connect the input s of the 3rd one order inertia module M8
2Be connected with switching signal, the output of the 3rd one order inertia module M8 respectively with the input s of time delay module M9
1Input s with the second multiplier module M11
2Connect the input s of time delay module M9
2Be connected the input s of the output of time delay module M9 and the 4th one order inertia module M10 with switching signal
1Connect the input s of the 4th one order inertia module M10
2Be connected the input s of the output of the 4th one order inertia module M10 and division module M5 with switching signal
2Connect, the output of division module M5 is connected with the input of the first one order inertia module M6, the input s of the output of the first one order inertia module M6 and the second multiplier module M11
1Connect the input s of the output of the second multiplier module M11 and addition module M12
1Connect the output of addition module M12
P 1Be connected with boiler master pressure set points module.
Be connected with the boiler master PID controller module of CFBB generating set on the described boiler master pressure set points module.
Specific implementation process of the present invention is as follows:
The actual pressure dynamic response characteristic test of the first step, process unit, adopt a ratio module M2, the first multiplier module M3, the second one order inertia module M7 and the 3rd one order inertia module M8 to constitute approximate two rank inertial elements series connection, come approximate representation test obtain according to pressure response characteristic from pot stove Give coal amount
BT changes to and generates the needed deferring procedure of corresponding quantity of steam; Adopt time delay module M9 and the 4th one order inertia module M10 approximate representation from generating steam to causing boiler heat storage energy variation needed time delay;
Second the step, according to the parameter under the unit different load, according to steam turbine pitch μ
tVariation is to the scope and the size of the influence of main vapour pressure, and with first function module M1 output as steam turbine pitch μ
tVariation is to estimating the influence value of pressure;
The 3rd step, main vapour pressure
PThe output valve that t deducts the first function module M1 obtains the output valve of subtraction block M4, and then obtains division module M5 output valve divided by the output valve of the 4th one order inertia module M10, again through the first one order inertia module M6, obtains main vapour pressure and adjusts coefficient;
The 4th step, the first one order inertia module M6 output valve multiply by the output valve that the 3rd one order inertia module M8 output valve obtains the second multiplier module M11, the output valve of adding the first function module M1 obtains addition module M12 output valve, obtains boiler prediction device output this moment and is and estimates pressure
P 1;
The 5th step,
P 1Ask deviation to send into boiler master PID computing with the boiler master pressure set points.
Claims (2)
1. the main vapour pressure auto-adaptive estimate device of a CFBB generating set, comprise addition module, subtraction block, multiplier module, division module, function module, one order inertia module and time delay module, it is characterized in that the input s of subtraction block (M4)
1Main vapour pressure with the CFBB generating set
PT connects, the input s of first function module (M1)
1Steam turbine pitch μ with the CFBB generating set
tConnect, the output of first function module (M1) respectively with the input s of subtraction block (M4)
2And the input s of addition module (M12)
2Connect the input s of the output of subtraction block (M4) and division module (M5)
1Connect the input s of first multiplier module (M3)
1Guo Lu Give coal amount with the CFBB generating set
BT connects, the input s of the output of ratio module (M2) and first multiplier module (M3)
2Connect the input s of the output of first multiplier module (M3) and the second one order inertia module (M7)
1Connect the input s of the second one order inertia module (M7)
2Be connected the input s of the output of the second one order inertia module (M7) and the 3rd one order inertia module (M8) with switching signal
1Connect the input s of the 3rd one order inertia module (M8)
2Be connected with switching signal, the output of the 3rd one order inertia module (M8) respectively with the input s of time delay module (M9)
1Input s with second multiplier module (M11)
2Connect the input s of time delay module (M9)
2Be connected the input s of the output of time delay module (M9) and the 4th one order inertia module (M10) with switching signal
1Connect the input s of the 4th one order inertia module (M10)
2Be connected the input s of the output of the 4th one order inertia module (M10) and division module (M5) with switching signal
2Connect, the output of division module (M5) is connected with the input of the first one order inertia module (M6), the input s of the output of the first one order inertia module (M6) and second multiplier module (M11)
1Connect the input s of the output of second multiplier module (M11) and addition module (M12)
1Connect the output of addition module (M12)
P 1Be connected with boiler master pressure set points module.
2. the main vapour pressure auto-adaptive estimate device of a kind of CFBB generating set according to claim 1, it is characterized in that, be connected with the boiler master PID controller module of CFBB generating set on the described boiler master pressure set points module.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201310111800.6A CN103216826B (en) | 2013-04-02 | 2013-04-02 | Main steam pressure self-adaptive predictor of generator set of circulating fluidized bed boiler |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201310111800.6A CN103216826B (en) | 2013-04-02 | 2013-04-02 | Main steam pressure self-adaptive predictor of generator set of circulating fluidized bed boiler |
Publications (2)
Publication Number | Publication Date |
---|---|
CN103216826A true CN103216826A (en) | 2013-07-24 |
CN103216826B CN103216826B (en) | 2015-03-11 |
Family
ID=48814854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201310111800.6A Active CN103216826B (en) | 2013-04-02 | 2013-04-02 | Main steam pressure self-adaptive predictor of generator set of circulating fluidized bed boiler |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN103216826B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103411213A (en) * | 2013-08-05 | 2013-11-27 | 浙江大学 | Power consumption prediction system and method for fans of circulating fluidized bed boiler |
CN103574598A (en) * | 2013-11-09 | 2014-02-12 | 国家电网公司 | Coordinative feed-forward control system of circulating fluidized bed unit |
CN103616913A (en) * | 2013-08-05 | 2014-03-05 | 浙江大学 | Circulating fluidized bed boiler induced-draft fan current prediction system and method |
CN106123005A (en) * | 2016-06-23 | 2016-11-16 | 国网新疆电力公司电力科学研究院 | The coal-supplying amount pre-control method of coal unit boiler feed-forward |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07210208A (en) * | 1994-01-12 | 1995-08-11 | Hitachi Ltd | Autotuning method for thermal power plant and thermal power plant controller utilizing the same |
JP2001041403A (en) * | 1999-07-30 | 2001-02-13 | Babcock Hitachi Kk | Boiler controller |
US20040081549A1 (en) * | 2002-10-28 | 2004-04-29 | Vadim Shapiro | Method and apparatus for improving steam turbine control |
CN102588011A (en) * | 2012-03-06 | 2012-07-18 | 山西省电力公司电力科学研究院 | Steam engine main control system of large fossil power unit |
CN102607053A (en) * | 2012-02-29 | 2012-07-25 | 东南大学 | Intermittent control method for eliminating static deviation of main steam pressure of fossil fuel fired power unit |
-
2013
- 2013-04-02 CN CN201310111800.6A patent/CN103216826B/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07210208A (en) * | 1994-01-12 | 1995-08-11 | Hitachi Ltd | Autotuning method for thermal power plant and thermal power plant controller utilizing the same |
JP2001041403A (en) * | 1999-07-30 | 2001-02-13 | Babcock Hitachi Kk | Boiler controller |
US20040081549A1 (en) * | 2002-10-28 | 2004-04-29 | Vadim Shapiro | Method and apparatus for improving steam turbine control |
CN102607053A (en) * | 2012-02-29 | 2012-07-25 | 东南大学 | Intermittent control method for eliminating static deviation of main steam pressure of fossil fuel fired power unit |
CN102588011A (en) * | 2012-03-06 | 2012-07-18 | 山西省电力公司电力科学研究院 | Steam engine main control system of large fossil power unit |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103411213A (en) * | 2013-08-05 | 2013-11-27 | 浙江大学 | Power consumption prediction system and method for fans of circulating fluidized bed boiler |
CN103616913A (en) * | 2013-08-05 | 2014-03-05 | 浙江大学 | Circulating fluidized bed boiler induced-draft fan current prediction system and method |
CN103574598A (en) * | 2013-11-09 | 2014-02-12 | 国家电网公司 | Coordinative feed-forward control system of circulating fluidized bed unit |
CN103574598B (en) * | 2013-11-09 | 2015-11-04 | 国家电网公司 | A kind of circulating fluidized bed unit cooperative feedforward control system |
CN106123005A (en) * | 2016-06-23 | 2016-11-16 | 国网新疆电力公司电力科学研究院 | The coal-supplying amount pre-control method of coal unit boiler feed-forward |
Also Published As
Publication number | Publication date |
---|---|
CN103216826B (en) | 2015-03-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Iovine et al. | Nonlinear control of a DC microgrid for the integration of photovoltaic panels | |
Ray et al. | A robust firefly–swarm hybrid optimization for frequency control in wind/PV/FC based microgrid | |
Yu et al. | Risk assessment of integrated electrical, natural gas and district heating systems considering solar thermal CHP plants and electric boilers | |
Meng et al. | Adaptive power capture control of variable-speed wind energy conversion systems with guaranteed transient and steady-state performance | |
CN101509656B (en) | Supercritical DC furnace synthesis type coordinating control method | |
CN103216826B (en) | Main steam pressure self-adaptive predictor of generator set of circulating fluidized bed boiler | |
Xie et al. | Implicit model predictive control of a full bridge DC–DC converter | |
JP6046890B2 (en) | Steam turbine loading method and loading system | |
Babaei et al. | Salp swarm algorithm‐based fractional‐order PID controller for LFC systems in the presence of delayed EV aggregators | |
Kalsi et al. | Aggregated modeling of thermostatic loads in demand response: A systems and control perspective | |
CN105429170A (en) | Micro-grid inverter droop control method based on adjustable virtual impedance | |
CN107453408B (en) | Micro-grid energy optimization scheduling method considering uncertainty | |
CN107294133A (en) | control method and device of photovoltaic-diesel composite power supply system | |
CN106707756A (en) | Extended state observer-integrated supercritical thermal power unit turbine-boiler coordinated control method | |
CN113889999B (en) | Active disturbance rejection control method and system for restraining voltage fluctuation of direct-current micro-grid | |
CN103574598B (en) | A kind of circulating fluidized bed unit cooperative feedforward control system | |
Abhilash et al. | Multi area load frequency control of power system involving renewable and non-renewable energy sources | |
Ravindran et al. | Flexible demand response in smart grid based Automatic Generation Control | |
Gusain et al. | Energy flexibility analysis using fmuworld | |
CN112363397B (en) | Steam pressure fluctuation feedforward control method, storage medium and system for thermal power generating unit | |
Aerts et al. | Study and simulation of DC micro grid topologies in Caspoc | |
Greenwood et al. | Control Systems for a Dynamic Multi-Physics Model of a Nuclear Hybrid Energy System | |
Bendtsen et al. | Efficient desynchronization of thermostatically controlled loads | |
Alfstad | Performance evaluation of combined heat and power (CHP) applications in low-energy houses | |
Delgado-Gomes et al. | A biological approach for energy management in smart grids and hybrid energy storage systems |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant |