CN106594793B - Fired power generating unit medium-speed pulverizer outlet temperature controls optimization method - Google Patents
Fired power generating unit medium-speed pulverizer outlet temperature controls optimization method Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 claims abstract description 24
- 238000012937 correction Methods 0.000 claims abstract description 5
- 239000003245 coal Substances 0.000 claims description 33
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- 238000012886 linear function Methods 0.000 claims description 6
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2223/00—Signal processing; Details thereof
- F23N2223/36—PID signal processing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2223/00—Signal processing; Details thereof
- F23N2223/44—Optimum control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2239/00—Fuels
- F23N2239/02—Solid fuels
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Abstract
The present invention relates to a kind of fired power generating unit medium-speed pulverizer outlet temperatures to control optimization method, it is to increase PID regulator in fired power generating unit distributed monitoring control system control logic configuration, increases chain control logic in fired power generating unit distributed monitoring control system control logic configuration；Increase the primary air pressure set point correct amount control loop interface based on the control optimization of medium-speed pulverizer outlet temperature in the control logic primary air pressure control loop configuration of fired power generating unit distributed monitoring control system, the output of primary air pressure set point correct amount chain control logic is introduced into the primary air pressure set point correct amount control loop interface based on the control optimization of medium-speed pulverizer outlet temperature, correction amount is controlled as primary air pressure；Control system puts into actual motion, and according to real time execution curve, on-line tuning fired power generating unit medium-speed pulverizer outlet temperature controls each control loop parameter, achieves the desired results.Real-time is good, and field adjustable process is simple, is convenient for Project Realization.
Description
Technical field
The invention belongs to thermal power generation unit automatic control technology field more particularly to a kind of fired power generating unit medium-speed pulverizers
Outlet temperature controls optimization method.It can be used for medium-speed pulverizer outlet temperature of the fired power generating unit in actual moving process to control automatically
System ensures unit in the process of running, automatically in the reasonable scope by the control of medium-speed pulverizer outlet temperature.
Background technology
Fired power generating unit often occurs that coal that medium-speed pulverizer is ground is changeable and medium-speed pulverizer in actual moving process
Entrance primary air measuring inaccuracy problem causes medium-speed pulverizer outlet temperature to control unstable, fluctuated, shadow when serious
Ring the safe and stable operation of coal pulverizer.Grid company requires online thermal power generation unit that must have frequency modulation peak regulating function, and carries
Specific technical indicator and evaluation method are gone out.Fired power generating unit coordinated control system is the highest controller in unit allocation,
It is responsible for coordinating steam turbine and the energy balance of boiler room controls, ensures that unit participates in the regulation quality of power grid frequency modulation peak regulation.Unit
It is multi-input multi-output system to coordinate control controlled device, with non-linear, parameter slow time-varying and large time lag and big inertia
Feature.It is especially embodied in the changeable controlling unit of operating condition and is related to medium-speed pulverizer during entire peak-frequency regulation
Startup, stopping, the control process such as coal-supplying amount increases, coal-supplying amount is reduced, the spatial load forecasting in order to meet coordinated control system wants
It asks, the control of medium-speed pulverizer outlet temperature must stablize, reliably, ensure that medium-speed pulverizer is safe and stable in the process of running, give
The control of medium-speed pulverizer outlet temperature brings many difficulties.
Numerous domestic scholars studied fired power generating unit medium-speed pulverizer outlet temperature control relevant issues in recent years
With discussion, such as《China Power》's《Improve influence of the medium-speed pulverizer outlet temperature to boiler operatiopn》, coal pulverizer outlet temperature
When degree rises to 95 DEG C by 75 DEG C, coal pulverizer import hot blast temperature is increased to 261.4 DEG C, is deposited without CO in coal pulverizer outlet breeze airflow
In the outlet of, air preheater, First air, Secondary Air temperature are declined, and hearth combustion and operating parameter variation are little, smoke evacuation
Temperature reduces by 7 DEG C or so, and boiler efficiency improves 0.37%, and standard coal consumption rate for generating declines 1.17 g/ (kWh).《Guangdong Electric Power》
's《A kind of application study of parameter adaptive PI type Fuzzy controller in overcritical pulverizer outlet temperature control system》For
Pulverizer outlet temperature is difficult to the shortcomings that controlling, and proposes a kind of parameter adaptive fuzzy proportional-integral (PI) control strategy, the control
System strategy can export adaptive fuzzy PI controllers using the real-time tendency combination fuzzy rule base during control
Partial scale factor carries out on-line tuning, when inlet temperature changes, dynamically controls the aperture of cold wind door guard plate, makes
System output is equal with given temperature, improves the dynamic characteristic of pulverizer outlet temperature control system.
The above document is mainly from the benefit of raising pulverizer outlet temperature, the parameter tuning of coal pulverizer cold wind door guard plate
Etc. be expounded, and conclusion (of pressure testing) and parameter tuning method when obtaining, but cold First air is controlled to fired power generating unit and is adjusted
Door, heat primary air adjust door, the coordination of primary air fan outlet pressure control executing agency ensures medium-speed pulverizer outlet temperature
It meets the requirements and is not studied targetedly.
Invention content
For the above-mentioned prior art the problem of, the present invention provide a kind of fired power generating unit medium-speed pulverizer outlet temperature
Control optimization method gives full play to its purpose is to solve the problems, such as that fired power generating unit medium-speed pulverizer outlet temperature automatically controls
Equipment potential ensures the stability of medium-speed pulverizer outlet temperature while meeting power grid frequency modulation peak regulation requirement.
The purpose of the present invention is what is be achieved through the following technical solutions：
Fired power generating unit medium-speed pulverizer outlet temperature controls optimization method, is in fired power generating unit distributed monitoring control system
The cold First air that medium-speed pulverizer is designed in control logic configuration adjusts door control logic, heat primary air adjusts door control logic and
Primary air pressure set point correct amount control logic controls cold First air and adjusts door, heat primary air adjusting door, primary air fan outlet
The coordination of pressure control executing agency ensures that medium-speed pulverizer outlet temperature is met the requirements, and specifically includes following steps：
The first step：Increase following PID regulator in the control logic configuration of fired power generating unit distributed monitoring control system：In
The cold First air of speed coal mill outlet temperature adjusts door PID regulator, and the heat primary air of medium-speed pulverizer outlet temperature adjusts door
PID regulator；
Second step：Increase following chain control logic in the control logic configuration of fired power generating unit distributed monitoring control system：
Medium-speed pulverizer heat primary air adjusts the aperture chain control logic of door, and primary air pressure set point correct amount chain control is patrolled
Volume；
Third walks：Increase in the control logic primary air pressure control loop configuration of fired power generating unit distributed monitoring control system
Add the primary air pressure set point correct amount control loop interface based on the control optimization of medium-speed pulverizer outlet temperature, and will be primary
The output of wind pressure set point correct amount chain control logic is introduced into one based on the control optimization of medium-speed pulverizer outlet temperature
Correction amount in secondary wind pressure set point correct amount control loop interface as primary air pressure control；
4th step：Control system puts into actual motion, according to real time execution curve, on-line tuning fired power generating unit middling speed coal-grinding
Machine outlet temperature controls each control loop relevant parameter, is finally reached expected control effect.
The cold First air of medium-speed pulverizer outlet temperature described in the first step adjusts door PID regulator：Medium-speed pulverizer
Coal machine outlet temperature actual measured value A, medium-speed pulverizer outlet temperature artificial settings value desired value B calculate the difference C of A and B,
PID arithmetic is carried out to difference C, PID arithmetic show that the cold First air of medium-speed pulverizer outlet temperature adjusts door opening degree instruction；Middling speed
The heat primary air of pulverizer outlet temperature adjusts door PID regulator：Medium-speed pulverizer outlet temperature actual measured value A, in
Speed coal mill outlet temperature artificial settings value desired value D calculates the difference E of A and D, and PID arithmetic, PID arithmetic are carried out to difference E
Show that the heat primary air of medium-speed pulverizer outlet temperature adjusts door opening degree instruction.
The aperture chain control logic that medium-speed pulverizer heat primary air described in second step adjusts door includes：Work as medium-speed pulverizer
When the cold First air of coal machine outlet temperature adjusts door aperture less than F, the heat primary air of medium-speed pulverizer outlet temperature is adjusted under door
It is G to limit chain aperture, and the upper limit 100, the adjustable range that control heat primary air adjusts door PID regulator is G ~ 100, works as medium-speed pulverizer
When the cold First air of coal machine outlet temperature adjusts door aperture more than H, the heat primary air of medium-speed pulverizer outlet temperature is adjusted under door
It is I to limit chain aperture, and the upper limit 100, the adjustable range that control heat primary air adjusts door PID regulator is I ~ 100, works as medium-speed pulverizer
When coal machine entrance primary air pressure is less than J, the heat primary air of medium-speed pulverizer outlet temperature adjusts door locking and closes, control heat one
Secondary wind adjusts the locking of door PID regulator and closes, when medium-speed pulverizer outlet, First air speed is less than K, medium-speed pulverizer outlet
The heat primary air of temperature adjusts door locking and closes, and control heat primary air adjusts the locking of door PID regulator and closes.
Primary air pressure set point correct amount chain control logic described in second step includes when medium-speed pulverizer exports
When temperature actual measured value A is higher than alarming value, while heat primary air adjusts door aperture and reaches lower limiting value, and cold First air is adjusted
Door aperture reaches upper limit value, and chain triggering primary air pressure set point correct amount A is effective, this primary air pressure set point correct amount
Range value by medium-speed pulverizer outlet temperature actual measured value A function f1(x) it realizes, when medium-speed pulverizer outlet temperature is real
When border measured value A is less than alarming value, while heat primary air adjusts door aperture and reaches upper limit value, and cold First air adjusts door aperture
Lower limiting value is reached, chain triggering primary air pressure set point correct amount B is effective, the amplitude of this primary air pressure set point correct amount
It is worth the function f by medium-speed pulverizer outlet temperature actual measured value A2(x) it realizes, when medium-speed pulverizer outlet, First air speed is small
When L, chain triggering primary air pressure set point correct amount C is effective, the range value of this primary air pressure set point correct amount by
Medium-speed pulverizer exports the function f of First air speed actual measured value3(x) it realizes.
The cold First air adjusts door, heat primary air adjusts the algorithm logic of door and primary air pressure set point correct amount
It is：Medium-speed pulverizer outlet temperature actual measured value, cold First air adjust door aperture, and heat primary air adjusts door aperture, medium-speed pulverizer
Coal machine entrance primary air pressure, medium-speed pulverizer export First air speed can directly slave group distributed monitoring control system it is real-time
It is read in database；Switching condition：Cold First air adjusts door aperture and is less than F, and cold First air adjusts door aperture and is more than H, medium-speed pulverizer
Coal machine entrance primary air pressure is less than J, and medium-speed pulverizer exports First air speed and is less than K, and medium-speed pulverizer outlet temperature is practical
Measured value A is higher than alarming value, and heat primary air adjusts door aperture and reaches lower limiting value, and cold First air adjusts door aperture and reaches upper limit value,
Medium-speed pulverizer outlet temperature actual measured value A is less than alarming value, and heat primary air adjusts door aperture and reaches upper limit value, cold First air
It adjusts door aperture and reaches lower limiting value, medium-speed pulverizer exports First air speed and is less than L, obtained by logic judgment；f1(x) it is non-thread
Property function generator, input be medium-speed pulverizer outlet temperature actual measured value A, export as primary air pressure set point correct
A is measured, output need to effectively meet following condition：Medium-speed pulverizer outlet temperature actual measured value A is higher than alarming value, while heat is primary
Wind adjusts door aperture and reaches lower limiting value, and cold First air adjusts door aperture and reaches upper limit value；f2(x) it is nonlinear function
Device, input are medium-speed pulverizer outlet temperature actual measured value, are exported as primary air pressure set point correct amount B, and output has
Effect need to meet following condition：Medium-speed pulverizer outlet temperature actual measured value A is less than alarming value, while heat primary air adjusts door and opens
Degree reaches upper limit value, and cold First air adjusts door aperture and reaches lower limiting value；f3(x) it is non-linear function generator, input
First air speed actual measured value is exported for medium-speed pulverizer, is exported as primary air pressure set point correct amount C, output effectively need
Meet following condition：Medium-speed pulverizer exports First air speed and is less than L；f1(x)、f2(x)、f3(x) parameter can be according to real-time song
Line on-line tuning, the principle adjusted are to ensure that unit is being run by existing unit distributed monitoring control system coordinated control system
In the process, medium-speed pulverizer outlet temperature is controlled in the reasonable scope automatically.
Advantages of the present invention and advantageous effect are：
（1）Cold First air by designing medium-speed pulverizer adjusts door control logic, heat primary air adjusts door control logic
With primary air pressure set point correct amount control logic, realize that controlling cold First air adjusts door, heat primary air adjusting door, First air
The coordination of machine outlet pressure control executing agency ensures that medium-speed pulverizer outlet temperature is met the requirements, and is given full play to realize
Equipment potential ensures the stability of unit medium-speed pulverizer outlet temperature while meeting service requirement.
（2）The labor intensity of operations staff, and technical merit of the control effect independent of operations staff can effectively be reduced.
（3）Real-time is good, and field adjustable process is simple, is convenient for Project Realization.
Description of the drawings
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
Fig. 1 is that the cold First air of inventive algorithm adjusts door and heat primary air adjusts and gates logic chart processed；
Fig. 2 is inventive algorithm primary air pressure set point correct amount logic chart；
Fig. 3 is the workflow block diagram of the present invention.
Specific implementation mode
The present invention is a kind of fired power generating unit medium-speed pulverizer outlet temperature control optimization method, is to disperse to control in fired power generating unit
The cold First air that medium-speed pulverizer is designed in the control logic configuration of system DCS processed adjusts door control logic, heat primary air is adjusted
Door control logic and primary air pressure set point correct amount control logic, control cold First air adjusts door, heat primary air adjusts door,
The coordination of primary air fan outlet pressure control executing agency ensures that medium-speed pulverizer outlet temperature is met the requirements, as shown in figure 3,
Specifically comprise the following steps：
The first step：Increase following PID regulator in the control logic configuration of fired power generating unit distributed monitoring control system：In
The cold First air of speed coal mill outlet temperature adjusts door PID regulator, and the heat primary air of medium-speed pulverizer outlet temperature adjusts door
PID regulator.
Wherein：DCS is the English abbreviation of scattered control system（Distributed Control System）.
PID regulator is the English abbreviation of proportional integral derivative controller（Proportion Integration
Differentiation）.
Second step：Increase following chain control logic in the control logic configuration of fired power generating unit distributed monitoring control system：
Medium-speed pulverizer heat primary air adjusts the aperture chain control logic of door, and primary air pressure set point correct amount chain control is patrolled
Volume；
Third walks：Increase in the control logic primary air pressure control loop configuration of fired power generating unit distributed monitoring control system
Add the primary air pressure set point correct amount control loop interface based on the control optimization of medium-speed pulverizer outlet temperature, and will be primary
The output of wind pressure set point correct amount chain control logic is introduced into one based on the control optimization of medium-speed pulverizer outlet temperature
Correction amount in secondary wind pressure set point correct amount control loop interface as primary air pressure control；
4th step：Control system puts into actual motion, according to real time execution curve, on-line tuning fired power generating unit middling speed coal-grinding
Machine outlet temperature controls each control loop relevant parameter, is finally reached expected control effect.
The cold First air adjusting door PID regulator of the medium-speed pulverizer outlet temperature includes in the first step：Middling speed
Pulverizer outlet temperature actual measured value A, medium-speed pulverizer outlet temperature artificial settings value desired value B calculate the difference of A and B
C carries out PID arithmetic to difference C, and PID arithmetic show that the cold First air of medium-speed pulverizer outlet temperature adjusts door opening degree instruction；In
The heat primary air of speed coal mill outlet temperature adjusts door PID regulator：Medium-speed pulverizer outlet temperature actual measured value A,
Medium-speed pulverizer outlet temperature artificial settings value desired value D calculates the difference E of A and D, and PID arithmetic, PID fortune are carried out to difference E
It calculates and show that the heat primary air of medium-speed pulverizer outlet temperature adjusts door opening degree instruction.
The aperture chain control logic that medium-speed pulverizer heat primary air described in second step adjusts door includes：Work as medium-speed pulverizer
When the cold First air of coal machine outlet temperature adjusts door aperture less than F, the heat primary air of medium-speed pulverizer outlet temperature is adjusted under door
It is G to limit chain aperture, and the upper limit 100, the adjustable range that control heat primary air adjusts door PID regulator is G ~ 100, works as medium-speed pulverizer
When the cold First air of coal machine outlet temperature adjusts door aperture more than H, the heat primary air of medium-speed pulverizer outlet temperature is adjusted under door
It is I to limit chain aperture, and the upper limit 100, the adjustable range that control heat primary air adjusts door PID regulator is I ~ 100, works as medium-speed pulverizer
When coal machine entrance primary air pressure is less than J, the heat primary air of medium-speed pulverizer outlet temperature adjusts door locking and closes, control heat one
Secondary wind adjusts the locking of door PID regulator and closes, when medium-speed pulverizer outlet, First air speed is less than K, medium-speed pulverizer outlet
The heat primary air of temperature adjusts door locking and closes, and control heat primary air adjusts the locking of door PID regulator and closes.
Primary air pressure set point correct amount chain control logic described in second step includes when medium-speed pulverizer exports
When temperature actual measured value A is higher than alarming value, while heat primary air adjusts door aperture and reaches lower limiting value, and cold First air is adjusted
Door aperture reaches upper limit value, and chain triggering primary air pressure set point correct amount A is effective, this primary air pressure set point correct amount
Range value by medium-speed pulverizer outlet temperature actual measured value A function f1(x) it realizes, when medium-speed pulverizer outlet temperature is real
When border measured value A is less than alarming value, while heat primary air adjusts door aperture and reaches upper limit value, and cold First air adjusts door aperture
Lower limiting value is reached, chain triggering primary air pressure set point correct amount B is effective, the amplitude of this primary air pressure set point correct amount
It is worth the function f by medium-speed pulverizer outlet temperature actual measured value A2(x) it realizes, when medium-speed pulverizer outlet, First air speed is small
When L, chain triggering primary air pressure set point correct amount C is effective, the range value of this primary air pressure set point correct amount by
Medium-speed pulverizer exports the function f of First air speed actual measured value3(x) it realizes.
The cold First air adjusts door, heat primary air adjusts the algorithm logic of door and primary air pressure set point correct amount
It is：Medium-speed pulverizer outlet temperature actual measured value, cold First air adjust door aperture, and heat primary air adjusts door aperture, medium-speed pulverizer
Coal machine entrance primary air pressure, medium-speed pulverizer export First air speed can directly slave group distributed monitoring control system it is real-time
It is read in database；Switching condition：Cold First air adjusts door aperture and is less than F, and cold First air adjusts door aperture and is more than H, medium-speed pulverizer
Coal machine entrance primary air pressure is less than J, and medium-speed pulverizer exports First air speed and is less than K, and medium-speed pulverizer outlet temperature is practical
Measured value A is higher than alarming value, and heat primary air adjusts door aperture and reaches lower limiting value, and cold First air adjusts door aperture and reaches upper limit value,
Medium-speed pulverizer outlet temperature actual measured value A is less than alarming value, and heat primary air adjusts door aperture and reaches upper limit value, cold First air
It adjusts door aperture and reaches lower limiting value, medium-speed pulverizer exports First air speed and is less than L, obtained by logic judgment；f1(x) it is non-thread
Property function generator, input be medium-speed pulverizer outlet temperature actual measured value A, export as primary air pressure set point correct
A is measured, output need to effectively meet following condition：Medium-speed pulverizer outlet temperature actual measured value A is higher than alarming value, while heat is primary
Wind adjusts door aperture and reaches lower limiting value, and cold First air adjusts door aperture and reaches upper limit value；f2(x) it is nonlinear function
Device, input are medium-speed pulverizer outlet temperature actual measured value, are exported as primary air pressure set point correct amount B, and output has
Effect need to meet following condition：Medium-speed pulverizer outlet temperature actual measured value A is less than alarming value, while heat primary air adjusts door and opens
Degree reaches upper limit value, and cold First air adjusts door aperture and reaches lower limiting value；f3(x) it is non-linear function generator, input
First air speed actual measured value is exported for medium-speed pulverizer, is exported as primary air pressure set point correct amount C, output effectively need
Meet following condition：Medium-speed pulverizer exports First air speed and is less than L；f1(x)、f2(x)、f3(x) parameter can be according to real-time song
Line on-line tuning, the principle adjusted are to ensure that unit is being run by existing unit distributed monitoring control system coordinated control system
In the process, medium-speed pulverizer outlet temperature is controlled in the reasonable scope automatically.
Core of the invention thought is to adjust door control logic, heat primary air by designing the cold First air of medium-speed pulverizer
Door control logic and primary air pressure set point correct amount control logic are adjusted, it is primary to realize that the cold First air of control adjusts door, heat
Wind adjusts door, the coordination of primary air fan outlet pressure control executing agency ensures that medium-speed pulverizer outlet temperature is met the requirements,
Equipment potential is given full play to realize, while meeting service requirement, ensures the steady of unit medium-speed pulverizer outlet temperature
It is qualitative.
Cold First air adjusts door in the present invention and heat primary air adjusts door algorithm logic figure, i.e. fired power generating unit medium-speed pulverizer
The cold First air of outlet temperature control optimization method adjusts door and heat primary air adjusting door control logic is as shown in Figure 1.In Fig. 1,
Medium-speed pulverizer outlet temperature actual measured value, cold First air adjust door aperture, and heat primary air adjusts door aperture, medium-speed pulverizer
Entrance primary air pressure can be read in direct slave group distributed monitoring control system real-time data base；Switching condition：Cold First air
It adjusts door aperture and is less than F, cold First air adjusts door aperture and is more than H, and medium-speed pulverizer entrance primary air pressure is less than J, medium-speed pulverizer
Coal machine exports First air speed and is less than K, is obtained by logic judgment.
Primary air pressure set point correct quantity algorithm logic chart in the present invention, i.e. fired power generating unit medium-speed pulverizer outlet temperature
The primary air pressure set point correct amount control logic for controlling optimization method is as shown in Figure 2.In Fig. 2, medium-speed pulverizer outlet temperature
Actual measured value is spent, cold First air adjusts door aperture, and heat primary air adjusts door aperture, and it is equal that medium-speed pulverizer exports First air speed
It can be read in direct slave group distributed monitoring control system real-time data base；Switching condition：Medium-speed pulverizer outlet temperature is practical to be surveyed
Magnitude A is higher than alarming value, and heat primary air adjusts door aperture and reaches lower limiting value, and cold First air adjusts door aperture and reaches upper limit value, in
Speed coal mill outlet temperature actual measured value A is less than alarming value, and heat primary air adjusts door aperture and reaches upper limit value, cold First air tune
Section door aperture reaches lower limiting value, and medium-speed pulverizer exports First air speed and is less than L, obtained by logic judgment；f1(x) it is non-linear
Function generator, input are medium-speed pulverizer outlet temperature actual measured value A, are exported as primary air pressure set point correct amount
A, output need to effectively meet following condition：Medium-speed pulverizer outlet temperature actual measured value A is higher than alarming value, while heat primary air
It adjusts door aperture and reaches lower limiting value, and cold First air adjusts door aperture and reaches upper limit value；f2(x) it is nonlinear function
Device, input are medium-speed pulverizer outlet temperature actual measured value, are exported as primary air pressure set point correct amount B, and output has
Effect need to meet following condition：Medium-speed pulverizer outlet temperature actual measured value A is less than alarming value, while heat primary air adjusts door and opens
Degree reaches upper limit value, and cold First air adjusts door aperture and reaches lower limiting value；f3(x) it is non-linear function generator, input
First air speed actual measured value is exported for medium-speed pulverizer, is exported as primary air pressure set point correct amount C, output effectively need
Meet following condition：Medium-speed pulverizer exports First air speed and is less than L；f1(x)、f2(x)、f3(x) parameter can be according to real-time song
Line on-line tuning, the principle adjusted are to ensure that unit is being run by existing unit distributed monitoring control system coordinated control system
In the process, medium-speed pulverizer outlet temperature is controlled in the reasonable scope automatically.
Below by certain 300MW fired power generating unit medium-speed pulverizer outlet temperature control for, introduce algorithm parameter adjust as a result,
As shown in table 1.
Unit overview：The coal pulverizer of the unit is medium-speed pulverizer, and pulverized coal preparation system is direct-firing using positive pressure, equipped with 5 mills
Coal machine, every coal pulverizer configure a heat primary air and adjust door and a cold First air adjusting door, are equipped with the one of two 50% capacity
Secondary wind turbine provides primary heat, cold wind pulverized coal conveying.
As shown in table 1, table 1 is that the cold First air of medium-speed pulverizer adjusts door, heat primary air adjusting door and primary air pressure
Set point correct amount control parameter is adjusted.
In table 1 with f1(x) corresponding x is medium-speed pulverizer outlet temperature actual measured value（℃）；With f2(x) corresponding x is
Medium-speed pulverizer outlet temperature actual measured value（℃）；With f3(x) corresponding x is that medium-speed pulverizer exports First air speed reality
Measured value（m/s）；The medium-speed pulverizer outlet temperature actual measured value of the unit, cold First air adjust door aperture, heat primary air
Adjust door aperture, medium-speed pulverizer exports First air speed can be directly in slave group distributed monitoring control system real-time data base
It reads；Unit medium-speed pulverizer outlet temperature control loop Logical Configuration is completed, system is put into actual motion, is transported according to unit
Row curve, repeatedly on-line tuning f1(x)、f2(x)、f3(x) relevant parameter ensures unit while load responding fast and stable,
Automatically in the reasonable scope by main steam pressure control；Field adjustable process is simple, is convenient for Project Realization.
Claims (5)
1. fired power generating unit medium-speed pulverizer outlet temperature controls optimization method, including：In fired power generating unit distributed monitoring control system
The cold First air that medium-speed pulverizer is added in control logic configuration adjusts door control logic, heat primary air adjusts door control logic,
It controls cold First air and adjusts door and heat primary air adjusting door；
It is characterized in that further including：Primary air pressure set point correct amount control logic and the control of primary air fan outlet pressure are held
Row mechanism, specifically includes following steps：
The first step：Increase following PID regulator in the control logic configuration of fired power generating unit distributed monitoring control system：Medium-speed pulverizer
The cold First air of coal machine outlet temperature adjusts door PID regulator, and the heat primary air of medium-speed pulverizer outlet temperature adjusts door PID tune
Save device；
Second step：Increase following chain control logic in the control logic configuration of fired power generating unit distributed monitoring control system：Middling speed
Coal pulverizer heat primary air adjusts the aperture chain control logic of door, primary air pressure set point correct amount chain control logic；
Third walks：Increase base in the control logic primary air pressure control loop configuration of fired power generating unit distributed monitoring control system
In the primary air pressure set point correct amount control loop interface of medium-speed pulverizer outlet temperature control optimization, and by primary air pressure
The output of power set point correct amount chain control logic is introduced into the First air based on the control optimization of medium-speed pulverizer outlet temperature
Correction amount in pressure set points correction amount control loop interface as primary air pressure control；
4th step：Control system puts into actual motion, and according to real time execution curve, on-line tuning fired power generating unit medium-speed pulverizer goes out
Mouth temperature controls each control loop relevant parameter, is finally reached expected control effect.
2. fired power generating unit medium-speed pulverizer outlet temperature according to claim 1 controls optimization method, it is characterised in that：Institute
In the first step stated, the cold First air of medium-speed pulverizer outlet temperature adjusts door PID regulator and includes：Medium-speed pulverizer outlet temperature
Actual measured value A, medium-speed pulverizer outlet temperature artificial settings value desired value B are spent, the difference C of A and B is calculated, difference C is carried out
PID arithmetic, PID arithmetic show that the cold First air of medium-speed pulverizer outlet temperature adjusts door opening degree instruction；Medium-speed pulverizer exports
The heat primary air of temperature adjusts door PID regulator：Medium-speed pulverizer outlet temperature actual measured value A, medium-speed pulverizer go out
Mouth temperature artificial settings value desired value D, calculates the difference E of A and D, carries out PID arithmetic to difference E, PID arithmetic obtains medium-speed pulverizer
The heat primary air of coal machine outlet temperature adjusts door opening degree instruction.
3. fired power generating unit medium-speed pulverizer outlet temperature according to claim 1 controls optimization method, it is characterised in that：Institute
In the second step stated, the aperture chain control logic that medium-speed pulverizer heat primary air adjusts door includes：When medium-speed pulverizer exports
When the cold First air of temperature adjusts door aperture and is less than F, the heat primary air of medium-speed pulverizer outlet temperature adjusts that door lower limit is chain to be opened
Degree is G, and the upper limit 100, the adjustable range that control heat primary air adjusts door PID regulator is G ~ 100, when medium-speed pulverizer exports
When the cold First air of temperature adjusts door aperture and is more than H, the heat primary air of medium-speed pulverizer outlet temperature adjusts that door lower limit is chain to be opened
Degree is I, and the upper limit 100, the adjustable range that control heat primary air adjusts door PID regulator is I ~ 100, when medium-speed pulverizer entrance
When primary air pressure is less than J, the heat primary air of medium-speed pulverizer outlet temperature adjusts door locking and closes, and control heat primary air is adjusted
Door PID regulator locking is closed, when medium-speed pulverizer outlet, First air speed is less than K, the heat of medium-speed pulverizer outlet temperature
First air adjusts door locking and closes, and control heat primary air adjusts the locking of door PID regulator and closes.
4. fired power generating unit medium-speed pulverizer outlet temperature according to claim 1 controls optimization method, it is characterised in that：Institute
In the second step stated, primary air pressure set point correct amount chain control logic includes being surveyed when medium-speed pulverizer outlet temperature is practical
When magnitude A is higher than alarming value, while heat primary air adjusts door aperture and reaches lower limiting value, and cold First air adjusts door aperture and reaches
Upper limit value, chain triggering primary air pressure set point correct amount A is effective, the range value of this primary air pressure set point correct amount by
The function f of medium-speed pulverizer outlet temperature actual measured value A1(x) it realizes, as medium-speed pulverizer outlet temperature actual measured value A
When less than alarming value, while heat primary air adjusts door aperture and reaches upper limit value, and cold First air adjusts door aperture and reaches lower limit
Value, chain triggering primary air pressure set point correct amount B is effective, and the range value of this primary air pressure set point correct amount is by middling speed
The function f of pulverizer outlet temperature actual measured value A2(x) it realizes, when medium-speed pulverizer outlet, First air speed is less than L, even
Lock triggering primary air pressure set point correct amount C is effective, and the range value of this primary air pressure set point correct amount is by middling speed coal-grinding
Machine exports the function f of First air speed actual measured value3(x) it realizes.
5. fired power generating unit medium-speed pulverizer outlet temperature according to claim 1 controls optimization method, it is characterised in that：Institute
The cold First air stated adjusts door, heat primary air adjusts door and the algorithm logic of primary air pressure set point correct amount is：Medium-speed pulverizer
Coal machine outlet temperature actual measured value, cold First air adjust door aperture, and heat primary air adjusts door aperture, medium-speed pulverizer entrance one
Secondary wind pressure, medium-speed pulverizer outlet First air speed can be read in direct slave group distributed monitoring control system real-time data base
It takes；Switching condition：Cold First air adjusts door aperture and is less than F, and cold First air adjusts door aperture and is more than H, medium-speed pulverizer entrance one
Secondary wind pressure is less than J, and medium-speed pulverizer exports First air speed and is less than K, and medium-speed pulverizer outlet temperature actual measured value A is higher than
Alarming value, heat primary air adjust door aperture and reach lower limiting value, and cold First air adjusts door aperture and reaches upper limit value, and medium-speed pulverizer goes out
Mouth temperature actual measured value A is less than alarming value, and heat primary air adjusts door aperture and reaches upper limit value, and cold First air adjusts door aperture and arrives
Up to lower limiting value, medium-speed pulverizer exports First air speed and is less than L, is obtained by logic judgment；f1(x) it is nonlinear function
Device, input are medium-speed pulverizer outlet temperature actual measured value A, are exported as primary air pressure set point correct amount A, and output has
Effect need to meet following condition：Medium-speed pulverizer outlet temperature actual measured value A is higher than alarming value, while heat primary air adjusts door and opens
Degree reaches lower limiting value, and cold First air adjusts door aperture and reaches upper limit value；f2(x) it is non-linear function generator, input
For medium-speed pulverizer outlet temperature actual measured value, export as primary air pressure set point correct amount B, under output need to effectively meet
Row condition：Medium-speed pulverizer outlet temperature actual measured value A is less than alarming value, while heat primary air adjusts door aperture and reaches the upper limit
Value, and cold First air adjusts door aperture and reaches lower limiting value；f3(x) it is non-linear function generator, input is middling speed coal-grinding
Machine exports First air speed actual measured value, exports as primary air pressure set point correct amount C, and output need to effectively meet following item
Part：Medium-speed pulverizer exports First air speed and is less than L；f1(x)、f2(x)、f3(x) parameter can be whole online according to real-time curve
Fixed, the principle adjusted is to ensure unit in the process of running by existing unit distributed monitoring control system coordinated control system,
Automatically in the reasonable scope by the control of medium-speed pulverizer outlet temperature.
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| CN107262261B (en) * | 2017-07-12 | 2018-12-18 | 华北电力大学（保定） | A kind of coal pulverizer air quantity control method adapting to fired power generating unit Ultra-low load operation |
| CN110779003B (en) * | 2019-05-20 | 2021-08-27 | 中国神华能源股份有限公司 | Peak regulation method of thermal power generating unit |
| CN113028441B (en) * | 2021-03-17 | 2022-07-05 | 华北电力科学研究院有限责任公司 | Coal mill outlet temperature adjusting method and device and storage medium |
| CN113560026A (en) * | 2021-07-21 | 2021-10-29 | 山东日照发电有限公司 | One-key starting and stopping method for coal mill of thermal power generating unit |
| CN114017793A (en) * | 2021-09-17 | 2022-02-08 | 华能国际电力股份有限公司大连电厂 | Primary air pressure control method and device |
| CN114534901B (en) * | 2022-03-01 | 2022-11-11 | 华能上海石洞口发电有限责任公司 | Coal mill primary air control logic optimization method |
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