CN110410367A - A kind of steam-driven induced draft fan guide vane adaptive-optimum control method - Google Patents
A kind of steam-driven induced draft fan guide vane adaptive-optimum control method Download PDFInfo
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- CN110410367A CN110410367A CN201910720755.1A CN201910720755A CN110410367A CN 110410367 A CN110410367 A CN 110410367A CN 201910720755 A CN201910720755 A CN 201910720755A CN 110410367 A CN110410367 A CN 110410367A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/08—Adaptations for driving, or combinations with, pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/462—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
The present invention discloses a kind of steam-driven induced draft fan guide vane adaptive-optimum control method, mainly includes the following steps: 1) to put into the multiple auxiliary systems of small turbine, small turbine red switch condition is preset, into warming-up mode；2) under warming-up mode, small turbine revolving speed R is in during continuing raising speed on air-introduced machine, and air-introduced machine guide vane controls combustion chamber draft using close loop control circuit；3) when small turbine revolving speed raising speed reaches revolving speed preset value on air-introduced machine, into rotational speed regulation mode, rotational speed regulation mode controls combustion chamber draft using closed-loop control；4) on the basis of step 3), when boiler air quantity or load raising, big guide vane opening Y is gradually opened to aperture setting value, discharges air-introduced machine guide vane closed loop states, air-introduced machine guide vane enters adjusted open loop mode.The present invention passes through the economic opening value Y of optimal guide vane 0 Corresponding aperture piecewise function f (x) set is cured in DCS scattered control system, realizes that air-introduced machine wicket gate control combustion chamber draft is whole-process automatic in the unit full load stage.
Description
Technical field
The present invention relates to steam-driven induced draft fan adaptive technique fields more particularly to a kind of steam-driven induced draft fan guide vane adaptively to seek
Excellent control method.
Background technique
With increasingly enlarged, current country's Thermal generation unit air-introduced machine conventional design of internal fuel station capacity
It is all made of motor driven, with the increase of generator unit capacity, is become increasingly using station service design when motor drive
Difficulty, capacity motor brings electricity consumption increase, electric motor starting electric current big after increasing, to can cause the larger raising of cost of investment.
Also occurred in the market multiple power plant because air-introduced machine starting current is excessive cause busbar voltage reduce and cause unit trip
Situation.
Conventional design is that air-introduced machine and desulphurization devices are designed optimization, is merged using booster fan with air-introduced machine
Scheme, then air-introduced machine maximum duty electrical power will close to 1.1 ten thousand kilowatts, since its power of motor is excessively high, station service design ten
Point difficulty, it is too low that excessive starting current also results in station-service 6KV module goddess of lightning's line voltage, influences the peace of other running equipments
Entirely.Therefore for million units, air-introduced machine uses small turbine drive, and the conversion of two-stage energy has been lacked compared with conventional design,
Energy-saving effect will be apparent upon, especially the relatively high developed area of rate for incorporation into the power network；If air-introduced machine and booster fan close
Two is use small turbine drive scheme together, and energy conservation effect can be more obvious.
And the steam-driven induced draft fan of the advanced power plant of fraction is strictly to use guide-vane for fan and small turbine rotational speed regulation at present
Combustion chamber draft.When closed-loop control is using small turbine revolving speed control combustion chamber draft, air-introduced machine guide vane is in artificial manually at this time
Stage.Since two kinds of regulative modes of air-introduced machine guide vane and small turbine revolving speed are acted on a controlled plant --- burner hearth is negative
Pressure, is easy there are coupling phenomenon, so that regulation quality cannot get effective guarantee in automatic control.This existing control loop
In, when small turbine rotational speed regulation combustion chamber draft, air-introduced machine guide vane uses regulative mode, although this mode reduces automatic tune
Difficulty is saved, but the artificial aperture of air-introduced machine guide vane cannot ensure that air-introduced machine small turbine economy obtains maximum performance.
Summary of the invention
It is above-mentioned to solve the purpose of the present invention is to provide a kind of steam-driven induced draft fan guide vane adaptive-optimum control method
The problem of background technique proposes.
A kind of steam-driven induced draft fan guide vane adaptive-optimum control method, which is characterized in that the control method is by small vapour
Turbine revolving speed control driving air-introduced machine wicket gate control combines to adjust boiler of power plant combustion chamber draft, mainly includes the following steps:
1) the multiple auxiliary systems of small turbine are put into, small turbine red switch condition are preset, into warming-up mode；
2) under warming-up mode, small turbine revolving speed R is in during continuing raising speed on air-introduced machine, and air-introduced machine guide vane uses closed loop control
Circuit processed controls combustion chamber draft；
3) when small turbine revolving speed R raising speed reaches revolving speed preset value on air-introduced machine, into rotational speed regulation mode, rotational speed regulation mode
Combustion chamber draft is controlled using closed-loop control；
4) on the basis of step 3), when boiler air quantity or load raising, big guide vane opening Y is gradually opened to aperture setting value, is released
Air-introduced machine guide vane closed loop states are put, air-introduced machine guide vane enters adjusted open loop mode.
Preferably, the adjusted open loop mode is automatic adjusument process, corresponds to guide vane most according to unit real-time load amount
The aperture piecewise function f (x) of excellent economic opening value determines that aperture piecewise function f (x) set is cured to DCS dispersion control
In system processed, so that guide vane opening point automatic Transition is to the Optimum Economic opening value to match with unit real-time load amount.
It is further preferred that the acquisition modes of the aperture piecewise function f (x) are as follows: 1. pass through unit typical load point pair
The load X answered 0 , in the two sides guide vane opening Y that guide-vane for fan designs economic aperture point, multiple aperture deviation Y are respectively set 1 To survey
Examination compares steam stream magnitude F 0 , respective function relationship at this time are as follows: Y=F(X 0 ), wherein Y 1 For aperture deviation, X 0 For unit load
Amount；
2. comparing steam stream magnitude F 0 Obtain the corresponding optimal economic opening value Y of guide vane of optimal economic aperture point 0 , fitting segmentation letter
Number, finally obtains different load point and corresponds to the economic opening value Y of optimal guide vane 0 Aperture piecewise function f (x): Y 0 =f(X 0 ), wherein
Y 0 For the economic opening value of optimal guide vane, X 0 For unit load amount.
Preferably, the revolving speed preset value is 2650r/min, and aperture setting value is 52%.
It is further preferred that minimum aperture deviation is also provided in the acquisition modes of the aperture piecewise function f (x),
It is denoted as Y min , the minimum aperture deviation is denoted as R by small turbine maximum speed max It corresponds to determination, and meets: Y >=
Y min , R≤R max 。
It is further preferred that the steam stream magnitude F 0 Be derived from four sections of steam extractions of unit, using online vapour measurement instrument come
It measures.
Preferably, when the step 4) guide vane opening is to aperture setting value, person on duty's switching button, including guide vane can be added
Adaptive investment button and the adaptive exit button of guide vane, for controlling whether air-introduced machine guide vane is in the adjusted open loop mode
Among.
Preferably, the small turbine red switch condition includes furnace pressure, air-supply instruction average value, air preheater exiting flue gas
Temperature averages and air preheater exit gas temperature failure.
Preferably, the air-introduced machine driving uses non-coaxial mode, passes through reduction gearing between air-introduced machine and small turbine
Case is coupled, and between the reduction gear box and air-introduced machine and small turbine, combines shaft coupling by diaphragm type and is coupled.
Due to taking above-mentioned technical solution, the beneficial effects of the present invention are: the present invention passes through the economic aperture of optimal guide vane
Value Y 0 Corresponding aperture piecewise function f (x) set is cured in DCS scattered control system, realizes air-introduced machine wicket gate control burner hearth
Negative pressure is whole-process automatic in the unit full load stage, and the air-introduced machine guide vane come that frequently varies to of unit load is avoided manually frequently to adjust
Section is not necessarily to operator intervention according to the corresponding air-introduced machine guide vane opening allocation strategy of unit load, reduces operation element amount,
Avoid maloperation hidden danger.
The adaptive opening value of air-introduced machine guide vane is the economic opening value of optimal guide vane, and same adjustment equipment is used and adaptively sought
Excellent control method, compared to the manual adjustment mode of traditional air-introduced machine guide vane, in the mesh for improving the economical operation of air-introduced machine small turbine
On greatly improve, reduce Turbine Steam consumption, greatly liberate substation operator workload, effectively improve the small vapour of air-introduced machine
Turbine efficiency saves cost of electricity-generating.
Detailed description of the invention
Illustrate technical solution of the present invention in order to clearer, it below will be to attached drawing needed in embodiment description
It is briefly described, it is clear that, drawings in the following description are only some embodiments of the invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is steam-driven induced draft fan guide vane opening control loop composition and connection relationship diagram of the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
A kind of steam-driven induced draft fan guide vane adaptive-optimum control method shown in FIG. 1 is please referred to, control method is by small vapour
Turbine revolving speed control driving air-introduced machine wicket gate control combines to adjust boiler of power plant combustion chamber draft, mainly includes the following steps:
1) the multiple auxiliary systems of small turbine are put into, small turbine red switch condition are preset, into warming-up mode；
2) under warming-up mode, small turbine revolving speed R is in during continuing raising speed on air-introduced machine, and air-introduced machine guide vane uses closed loop control
Circuit processed controls combustion chamber draft；
3) when small turbine revolving speed R raising speed reaches revolving speed preset value on air-introduced machine, into rotational speed regulation mode, rotational speed regulation mode
Combustion chamber draft is controlled using closed-loop control；
4) on the basis of step 3), when boiler air quantity or load raising, big guide vane opening Y is gradually opened to aperture setting value, is released
Air-introduced machine guide vane closed loop states are put, air-introduced machine guide vane enters adjusted open loop mode.
Adjusted open loop mode is automatic adjusument process, corresponds to guide vane Optimum Economic opening value according to unit real-time load amount
Aperture piecewise function f (x) determine that aperture piecewise function f (x) set is cured in DCS scattered control system, so that guide vane
Aperture point automatic Transition is to the Optimum Economic opening value to match with unit real-time load amount.
The acquisition modes of aperture piecewise function f (x) are as follows: 1. pass through the corresponding load X of unit typical load point 0 , in wind
Multiple aperture deviation Y are respectively arranged in the two sides guide vane opening Y that machine guide vane designs economic aperture point 1 Steam stream magnitude is compared to test
F 0 , respective function relationship at this time are as follows: Y=F(X 0 ), wherein Y 1 For aperture deviation, X 0 For unit load amount；
2. comparing steam stream magnitude F 0 Obtain the corresponding optimal economic opening value Y of guide vane of optimal economic aperture point 0 , fitting segmentation letter
Number, finally obtains different load point and corresponds to the economic opening value Y of optimal guide vane 0 Aperture piecewise function f (x): Y 0 =f(X 0 ), wherein
Y 0 For the economic opening value of optimal guide vane, X 0 For unit load amount.
In the present embodiment, revolving speed preset value is 2650r/min, and aperture setting value is 52%.
In the present embodiment, it is also provided with minimum aperture deviation in the acquisition modes of aperture piecewise function f (x), is denoted as
Y min , minimum aperture deviation is denoted as R by small turbine maximum speed max To correspond to determination, and satisfaction: Y >=Y min , R≤
R max 。
In the present embodiment, steam stream magnitude F 0 Four sections of steam extractions of unit are derived from, are measured using online vapour measurement instrument.
In the present embodiment, when step 4) guide vane opening is to aperture setting value, person on duty's switching button, such as Fig. 1 can be added
It is shown, including guide vane adaptively puts into button and the adaptive exit button of guide vane, for controlling whether air-introduced machine guide vane is in out
, can be according to special operation condition selectively switching guide vane self-adapting operation among ring regulative mode, i.e., whether selection guide vane opening function
It is placed in air-introduced machine guide vane circuit.
In the present embodiment, as shown in Figure 1, small turbine red switch condition includes furnace pressure, air-supply instruction average value, sky
Pre- device exit gas temperature average value and air preheater exit gas temperature failure.
In the present embodiment, air-introduced machine driving uses non-coaxial mode, passes through reducing gear between air-introduced machine and small turbine
Roller box is coupled, and between reduction gear box and air-introduced machine and small turbine, combines shaft coupling by diaphragm type and is coupled.Using soft in this way
Property shaft coupling+two-stage speed change for linking of mode, it is pioneering to belong to domestic power plant's same industry air-introduced machine driving, by big for a long time negative
As it can be seen that the non-coaxial mode technology maturation is reliable after lotus test run and operation, stable, performance basically reaches design requirement.
Steamer air-introduced machine guide vane self adaptive control detailed process of the invention and implementation are as follows:
1) the multiple auxiliary systems of small turbine are put into first, preset small turbine red switch condition, wherein red switch condition is preferentially examined
Consider furnace pressure, air-supply instruction average value, air preheater exit gas temperature average value and air preheater exit gas temperature failure to reach
To preset range condition, small turbine is enabled to can smoothly enter into warming-up mode.
2) under warming-up mode, small turbine revolving speed R is in during continuing raising speed on air-introduced machine, air-introduced machine guide vane at this time
Combustion chamber draft is controlled using close loop control circuit, closed loop adjusting is feedback regulation, and controlled output returns in a certain way
Apply a kind of control planning that control influences as the input terminal of control, and on input terminal.Here air-introduced machine guide vane rotational speed regulation
Object be combustion chamber draft, and combustion chamber draft affects adjusting output in turn as the input value of regulating loop.
3) small turbine revolving speed R continues raising speed when reaching revolving speed preset value on air-introduced machine, revolving speed preset value herein
Determine that preferred minimum value is 2650r/min according to test, so that small turbine enters rotational speed regulation mode, rotational speed regulation side
Formula is negative using closed-loop control control burner hearth, and same small turbine reaches simultaneously in output stable regulation combustion chamber draft, also by
The feed back input of combustion chamber draft is adjusted.
4) in above-mentioned steps 3) on the basis of, as the closed loop of small turbine and air-introduced machine guide vane is adjusted under control, boiler air
Amount or load can gradually rise, and need to meet and gradually open big guide vane opening Y to aperture setting value, discharge air-introduced machine guide vane closed loop
State, air-introduced machine guide vane enter adjusted open loop mode, and opened loop control herein refers to the system control mode of no feedback information, draw
Guide-vane for fan uses adjusted open loop mode, and the input terminal parameter of regulating loop is unit load, and output end is that air-introduced machine guide vane is opened
Y is spent, i.e., specific unit load corresponds to specific guide vane opening, to obtain unit load and guide vane opening respective function pass
System.
The aperture piecewise function f (x) of guide vane Optimum Economic opening value is corresponded to according to unit real-time load amount to determine, in order to
Aperture piecewise function f (x) set is cured to DCS scattered control system by the automatic adjusument process for meeting adjusted open loop mode
In, DCS scattered control system therein is generation current factory commonly use one by process control level and process monitoring level
Composition using communication network as the multi-level computer system of tie, abbreviation Distributed Control System carrys out coordinated control so as to the system
Generate electricity brand-name computer furnace, in the present embodiment, aperture piecewise function f (x) set is cured to DCS scattered control system, so that guide vane is opened
Point automatic Transition is spent to the Optimum Economic opening value to match with unit real-time load amount.
The acquisition modes of aperture piecewise function f (x) are as follows: pass through the corresponding load X of unit typical load point 0 , in blower
Multiple aperture deviation Y are respectively arranged in the two sides guide vane opening Y that guide vane designs economic aperture point 1 Steam stream magnitude F is compared to test 0 ,
Respective function relationship at this time are as follows: Y=F(X 0 ), wherein Y 1 For aperture deviation, X 0 For unit load amount.In the present embodiment, this is opened
The specific acquisition modes of degree piecewise function f (x) are are as follows: by test intended with multiple and different load X 0 , respectively choose 400MW,
Such 6 load points of 500MW, 600MW, 700MW, 800MW and 900MW, in this corresponding air-introduced machine guide vane economy of 6 load points
The two sides guide vane opening Y of aperture point, which are respectively arranged, chooses 5 aperture deviation Y 1 , then compare same load X 0 Under 5 apertures
Deviation Y 1 Corresponding steam stream magnitude F 0 , meet each stable conditions 5min or more, at this time respective function relationship are as follows: Y=F
(X 0 ), wherein Y 1 For aperture deviation, X 0 For unit load amount.As shown in table 1 below, it is led for unit load correspondence in the present embodiment
The economic aperture of leaf tests table.
In the present embodiment, it is also provided with minimum aperture deviation in the acquisition modes of aperture piecewise function f (x), is denoted as
Y min , minimum aperture deviation is denoted as R by small turbine maximum speed max To correspond to determination, and satisfaction: Y >=Y min , R≤
R max .Small turbine maximum speed R therein max Value is 5200r/min, because under working condition at full capacity, due to air inducing
Machine vibration characteristic limitation, when small turbine maximum speed reaches 5200r/min.Corresponding guide vane opening Y is opened beyond economy
Range is spent, so carrying out boundary limitation under the premise of ensuring safety.
1 unit load of table corresponds to the economic aperture test table of guide vane
Then according to comparing steam stream magnitude F shown in upper table 1 0 Obtain the corresponding optimal economic aperture of guide vane of optimal economic aperture point
Value Y 0 , it is fitted piecewise function, different load point is finally obtained and corresponds to the economic opening value Y of optimal guide vane 0 Aperture piecewise function f
(x): Y 0 =f(X 0 ), wherein Y 0 For the economic opening value of optimal guide vane, X 0 For unit load amount.It as shown in table 2 below, is the present embodiment
Middle unit load corresponds to the economic opening value Y of optimal guide vane 0 Aperture piecewise function table.
2 unit load of table corresponds to the economic opening value Y of optimal guide vane 0 Aperture piecewise function table
According to the aperture piecewise function table of table 2, realize air-introduced machine wicket gate control combustion chamber draft unit full load stage whole process from
It is dynamic, avoid the air-introduced machine guide vane come that frequently varies to of unit load from manually frequently adjusting, according to the corresponding air inducing of unit load
Machine guide vane opening allocation strategy is not necessarily to operator intervention, reduces operation element amount, also avoids maloperation hidden danger.Air-introduced machine guide vane
Adaptive opening value is the economic opening value of optimal guide vane, and same adjustment equipment uses adaptive-optimum control method, compared to biography
The manual adjustment mode of system air-introduced machine guide vane, greatly improves in the purpose for improving the economical operation of air-introduced machine small turbine,
Reduce Turbine Steam consumption, greatly liberate substation operator workload, effectively improve air-introduced machine small turbine efficiency, saves power generation
Cost.
Illustrate that power plant is according to the optimizing control by the above-mentioned elaboration to steamer air-introduced machine guide vane self adaptive control detailed process
Method processed finally realizes the target of economic stability operation, puts into operation effect from power plant is practical and verifies, power plant is to No. 4 machine the whole series
Starting and 168h test run, measuring technology index is outstanding than calculated value, and unit station service is practical during 168h test run
It is 2.86%, fewer than calculated value 3.103% 7.83%；The current comprehensive station service power consumption rate of annual unit that runs is no more than 2.75%；
Net coal consumption rate is slightly below theoretical calculation net coal consumption rate at full capacity, and the year before last actual power coal consumption in 17 years is 0.1g/ lower than calculated value
(kW·h)。
It is analyzed from economic benefit, deducts coal consumption for power generation and the increased cost of operating cost, separate unit steam-driven induced draft fan are annual
144.122 ten thousand yuan of the new profit, 2 576.488 ten thousand yuan of the new profit of unit years very little is put into, output benefit is fine, and guide vane is opened
The consumption that raw coal can be obviously saved after degree optimization, correspondingly reduces SO2、NOXAnd CO2Equal pollutant emissions, environmental benefit are bright
It is aobvious.
Particular embodiments described above, pair present invention solves the technical problem that, technical scheme and beneficial effects carry out
It is further described, it should be understood that the above is only a specific embodiment of the present invention, is not limited to this
Invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this hair
Within bright protection scope.
Claims (9)
1. a kind of steam-driven induced draft fan guide vane adaptive-optimum control method, which is characterized in that the control method is by small steamer
Machine revolving speed control driving air-introduced machine wicket gate control combines to adjust boiler of power plant combustion chamber draft, mainly includes the following steps:
1) the multiple auxiliary systems of small turbine are put into, small turbine red switch condition are preset, into warming-up mode；
2) under warming-up mode, small turbine revolving speed R is in during continuing raising speed on air-introduced machine, and air-introduced machine guide vane uses closed loop control
Circuit processed controls combustion chamber draft；
3) when small turbine revolving speed R raising speed reaches revolving speed preset value on air-introduced machine, into rotational speed regulation mode, rotational speed regulation mode
Combustion chamber draft is controlled using closed-loop control；
4) on the basis of step 3), when boiler air quantity or load raising, big guide vane opening Y is gradually opened to aperture setting value, is released
Air-introduced machine guide vane closed loop states are put, air-introduced machine guide vane enters adjusted open loop mode.
2. a kind of steam-driven induced draft fan guide vane adaptive-optimum control method according to claim 1, which is characterized in that described
Adjusted open loop mode is automatic adjusument process, and the aperture point of guide vane Optimum Economic opening value is corresponded to according to unit real-time load amount
Section function f (x) determines that aperture piecewise function f (x) set is cured in DCS scattered control system, so that guide vane opening
Automatic Transition is put to the Optimum Economic opening value to match with unit real-time load amount.
3. a kind of steam-driven induced draft fan guide vane adaptive-optimum control method according to claim 2, which is characterized in that described
The acquisition modes of aperture piecewise function f (x) are as follows: 1. pass through the corresponding load X of unit typical load point 0 , set in guide-vane for fan
Multiple aperture deviation Y are respectively arranged in the two sides guide vane opening Y for counting economic aperture point 1 Steam stream magnitude F is compared to test 0 , right at this time
Answer functional relation are as follows: Y=F(X 0 ), wherein Y 1 For aperture deviation, X 0 For unit load amount；
2. comparing steam stream magnitude F 0 Obtain the corresponding optimal economic opening value Y of guide vane of optimal economic aperture point 0 , fitting segmentation letter
Number, finally obtains different load point and corresponds to the economic opening value Y of optimal guide vane 0 Aperture piecewise function f (x): Y 0 =f(X 0 ), wherein
Y 0 For the economic opening value of optimal guide vane, X 0 For unit load amount.
4. a kind of steam-driven induced draft fan guide vane adaptive-optimum control method according to claim 1, which is characterized in that described
Revolving speed preset value is 2650r/min, and aperture setting value is 52%.
5. a kind of steam-driven induced draft fan guide vane adaptive-optimum control method according to claim 3, which is characterized in that described
It is also provided with minimum aperture deviation in the acquisition modes of aperture piecewise function f (x), is denoted as Y min , the minimum aperture deviation
By small turbine maximum speed, it is denoted as R max To correspond to determination, and satisfaction: Y >=Y min , R≤R max 。
6. a kind of steam-driven induced draft fan guide vane adaptive-optimum control method according to claim 3, which is characterized in that described
Steam stream magnitude F 0 Four sections of steam extractions of unit are derived from, are measured using online vapour measurement instrument.
7. a kind of steam-driven induced draft fan guide vane adaptive-optimum control method according to claim 1, which is characterized in that described
When step 4) guide vane opening is to aperture setting value, person on duty's switching button can be added, including guide vane adaptively puts into button and leads
The adaptive exit button of leaf, for controlling whether air-introduced machine guide vane is among the adjusted open loop mode.
8. a kind of steam-driven induced draft fan guide vane adaptive-optimum control method according to claim 1, which is characterized in that described
Small turbine red switch condition includes furnace pressure, air-supply instruction average value, air preheater exit gas temperature average value and air preheater
Exit gas temperature failure.
9. a kind of steam-driven induced draft fan guide vane adaptive-optimum control method according to claim 1, which is characterized in that described
Air-introduced machine driving uses non-coaxial mode, is coupled between air-introduced machine and small turbine by reduction gear box, the reduction gearing
Between case and air-introduced machine and small turbine, shaft coupling is combined by diaphragm type and is coupled.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112383254A (en) * | 2020-12-07 | 2021-02-19 | 中国长江电力股份有限公司 | Guide vane opening degree analog quantity segmentation open-loop control method and system |
| CN112923393A (en) * | 2021-03-31 | 2021-06-08 | 西安热工研究院有限公司 | Induced draft fan guide vane control system and method in auxiliary machine fault load reduction process |
| CN113325700A (en) * | 2021-05-31 | 2021-08-31 | 西安热工研究院有限公司 | Fan opening and efficiency online calculation method based on fan performance curve |
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| CN113325700B (en) * | 2021-05-31 | 2022-06-28 | 西安热工研究院有限公司 | Fan opening and efficiency online calculation method based on fan performance curve |
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