CN106594793A - Outlet temperature control optimizing method of medium-speed coal pulverizer of thermal power generating unit - Google Patents
Outlet temperature control optimizing method of medium-speed coal pulverizer of thermal power generating unit Download PDFInfo
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- CN106594793A CN106594793A CN201611030513.2A CN201611030513A CN106594793A CN 106594793 A CN106594793 A CN 106594793A CN 201611030513 A CN201611030513 A CN 201611030513A CN 106594793 A CN106594793 A CN 106594793A
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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 invention relates to an outlet temperature control optimizing method of a medium-speed coal pulverizer of a thermal power generating unit. The method is characterized in that a PID (Proportion Integration Differentiation) adjuster is additionally arranged in control logic configuration of a DCS (Distributed Control System) of the thermal power generating unit, and linkage control logic is added to the control logic configuration of the DCS of the thermal power generating unit; a primary air pressure setting value correction control loop port based on the outlet temperature control optimization of the medium-speed coal pulverizer is added to primary air pressure control loop configuration of the control logic of the DCS of the thermal power generating unit, and primary air pressure setting value correction linkage control logic output is introduced to the primary air pressure setting value correction control loop port based on the outlet temperature control optimization of the medium-speed coal pulverizer to be used as the primary air pressure control correction; and the DCS is put into actual operation, and the parameters of each control loop in the outlet temperature control of the medium-speed coal pulverizer of the thermal power generating unit are adjusted online, so as to achieve the expected effect. The method is high in real-time performance, simple in on-site debugging process, and conveniently carried out in engineering.
Description
Technical field
The invention belongs to thermal power generation unit automatic control technology field, more particularly to a kind of outlet of fired power generating unit medium-speed pulverizer
Temperature control optimization method.Can be used to medium-speed pulverizer outlet temperature of the fired power generating unit in actual moving process automatically control,
Ensure that unit in running, automatically controls medium-speed pulverizer outlet temperature in the reasonable scope.
Background technology
Fired power generating unit Jing in actual moving process often occurs that coal that medium-speed pulverizer grinds is changeable and medium-speed pulverizer
The inaccurate problem of entrance primary air measuring, 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 that online thermal power generation unit must possess frequency modulation peak regulating function, and carries
Specific technical specification 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 the energy balance control of steam turbine and boiler room, it is ensured that unit participates in the regulation quality of power grid frequency modulation peak regulation.Unit
It is multi-input multi-output system that coordination controls controlled device, with non-linear, parameter slow time-varying and large time lag and big inertia
Feature.The changeable controlling unit of operating condition is especially embodied in, during whole peak-frequency regulation, is related to medium-speed pulverizer
Startup, stopping, coal-supplying amount increase, coal-supplying amount reduce etc. control process, in order to meet coordinated control system spatial load forecasting will
Ask, the control of medium-speed pulverizer outlet temperature must stablize, reliability, it is ensured that medium-speed pulverizer is safe and stable in running, gives
The control of medium-speed pulverizer outlet temperature brings many difficulties.
In recent years numerous domestic scholars were studied fired power generating unit medium-speed pulverizer outlet temperature control relevant issues
With discussion, for example《China Power》's《Improve impact of the medium-speed pulverizer outlet temperature to boiler operatiopn》, coal pulverizer outlet temperature
When 75 DEG C rise to 95 DEG C, coal pulverizer import hot blast temperature is increased to 261.4 DEG C to degree, deposits without CO in coal pulverizer outlet breeze airflow
Decline in, air preheater outlet First air, secondary wind temperature, hearth combustion and operational factor change 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 applied research of parameter adaptive PI type Fuzzy controller in supercritical pulverizer outlet temperature control system》For
Pulverizer outlet temperature is difficult to the shortcoming for controlling, and proposes a kind of parameter adaptive fuzzy proportional-integration (PI) control strategy, the control
System strategy combines fuzzy rule base using the real-time tendency in control process, and adaptive fuzzy PI controllers can be exported
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 benefit, the parameter tuning of coal pulverizer cold wind door guard plate mainly from raising pulverizer outlet temperature
Etc. aspect be set forth, and conclusion (of pressure testing) and parameter tuning method when drawing, but cold First air is controlled to fired power generating unit adjust
Door, heat primary air adjust door, the control actuator coordination of primary air fan outlet pressure and ensure medium-speed pulverizer outlet temperature
Meet and require targetedly not studied.
The content of the invention
For above-mentioned problems of the prior art, the present invention provides a kind of fired power generating unit medium-speed pulverizer outlet temperature control
Optimization method, its purpose is to solution fired power generating unit medium-speed pulverizer outlet temperature and automatically controls problem, give full play to equipment
Potentiality, while power grid frequency modulation peak regulation requirement is met, it is ensured that the stability of medium-speed pulverizer outlet temperature.
The purpose of the present invention is achieved through the following technical solutions：
Fired power generating unit medium-speed pulverizer outlet temperature controls optimization method, is the control in fired power generating unit distributed monitoring control system
The cold First air that medium-speed pulverizer is designed in Logical Configuration adjusts gate control logic, heat primary air regulation gate control logical sum once
Wind pressure set point correct amount control logic, controls cold First air and adjusts door, heat primary air regulation door, primary air fan outlet pressure
Control actuator coordination ensures that medium-speed pulverizer outlet temperature meets requirement, 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 and adjusts
Section 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；
3rd step：Increase base in the control logic primary air pressure control loop configuration of fired power generating unit distributed monitoring control system
The primary air pressure set point correct amount control loop interface of optimization is controlled in medium-speed pulverizer outlet temperature, and by primary air pressure
The output of power set point correct amount chain control logic is incorporated into the First air that optimization is controlled based on medium-speed pulverizer outlet temperature
As the correction of primary air pressure control in pressure set points correction control loop interface；
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
Mouthful temperature control each control loop relevant parameter, is finally reached expected control effect.
The cold First air of the medium-speed pulverizer outlet temperature described in the first step adjusts door PID regulator to be included：Medium-speed pulverizer
Coal machine outlet temperature actual measured value A, medium-speed pulverizer outlet temperature is manually set value desired value B, calculates 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 to be included：Medium-speed pulverizer outlet temperature actual measured value A, in
Speed coal mill outlet temperature is manually set value desired value D, calculates difference E of A and D, and to difference E PID arithmetic, PID arithmetic are carried out
The heat primary air for drawing medium-speed pulverizer outlet temperature adjusts door opening degree instruction.
Medium-speed pulverizer heat primary air described in second step adjusts the aperture chain control logic of door to be included：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 is 100, and the range of accommodation for controlling heat primary air regulation 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 is 100, and the range of accommodation for controlling heat primary air regulation 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 is included when medium-speed pulverizer is exported
When temperature actual measured value A is higher than alarming value, while heat primary air adjusts door aperture reaches lower limit, and cold First air is adjusted
Door aperture reaches higher limit, 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 f1X () is realized, when medium-speed pulverizer outlet temperature reality
When border measured value A is less than alarming value, while heat primary air adjusts door aperture reaches higher limit, and cold First air adjusts door aperture
Lower limit 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 by the function f of medium-speed pulverizer outlet temperature actual measured value A2(x) realize, when medium-speed pulverizer outlet First air speed it is little
When L, chain triggering primary air pressure set point correct amount C effectively, 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 value3X () is realized.
Described cold First air adjusts the algorithm logic that door, heat primary air adjust door and primary air pressure set point correct amount
It is：Medium-speed pulverizer outlet temperature actual measured value, cold First air adjusts door aperture, and heat primary air adjusts door aperture, medium-speed pulverizer
Coal machine entrance primary air pressure, medium-speed pulverizer outlet First air speed can directly slave group distributed monitoring control system it is real-time
Read in data base；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 outlet First air speed is less than K, medium-speed pulverizer outlet temperature reality
Measured value A is higher than alarming value, and heat primary air adjusts door aperture and reaches lower limit, and cold First air adjusts door aperture and reaches higher limit,
Medium-speed pulverizer outlet temperature actual measured value A is less than alarming value, and heat primary air adjusts door aperture and reaches higher limit, cold First air
Adjust door aperture and reach lower limit, medium-speed pulverizer outlet First air speed is less than L, is drawn by logical judgment；f1X () is non-thread
Property functional generator, its input be medium-speed pulverizer outlet temperature actual measured value A, be output 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, with intermittent fever once
Wind adjusts door aperture and reaches lower limit, and cold First air adjusts door aperture and reaches higher limit；f2X () is nonlinear function generation
Device, its input is medium-speed pulverizer outlet temperature actual measured value, is output 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 opening
Degree reaches higher limit, and cold First air adjusts door aperture and reaches lower limit；f3X () is non-linear function generator, its input
First air speed actual measured value is exported for medium-speed pulverizer, primary air pressure set point correct amount C is output as, output is effectively needed
Meet following condition：Medium-speed pulverizer outlet First air speed is less than L；f1(x)、f2(x)、f3X the parameter of () can be according to real-time song
Line on-line tuning, the principle adjusted is by existing unit distributed monitoring control system coordinated control system, it is ensured that unit is in operation
During, medium-speed pulverizer outlet temperature is controlled in the reasonable scope automatically.
Advantages of the present invention and beneficial effect are：
（1）Gate control logic, heat primary air regulation gate control logical sum one are adjusted by designing the cold First air of medium-speed pulverizer
Secondary wind pressure set point correct amount control logic, realizes that the cold First air of control adjusts door, heat primary air regulation door, primary air fan and goes out
Mouth Stress control actuator coordination ensures that medium-speed pulverizer outlet temperature meets and requires, so as to realize giving full play to equipment
Potentiality, while service requirement is met, it is ensured that the stability of unit medium-speed pulverizer outlet temperature.
（2）The labor intensity of operations staff can be effectively reduced, and control effect does not rely on the technical merit of operations staff.
（3）Real-time is good, and field adjustable process is simple, is easy to Project Realization.
Description of the drawings
Below in conjunction with the accompanying drawings the present invention is further detailed explanation with specific embodiment.
Fig. 1 is that the cold First air of inventive algorithm adjusts door and heat primary air adjusts gate control logic chart；
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 embodiment
The present invention is a kind of fired power generating unit medium-speed pulverizer outlet temperature control optimization method, is controlled in fired power generating unit dispersion
The cold First air that medium-speed pulverizer is designed in the control logic configuration of system DCS processed adjusts gate control logic, heat primary air regulation
Gate control logical sum primary air pressure set point correct amount control logic, control cold First air adjust door, heat primary air adjust door,
The control actuator coordination of primary air fan outlet pressure ensures that medium-speed pulverizer outlet temperature meets requirement, as shown in figure 3,
Specifically include 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 and adjusts
Section device.
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；
3rd step：Increase base in the control logic primary air pressure control loop configuration of fired power generating unit distributed monitoring control system
The primary air pressure set point correct amount control loop interface of optimization is controlled in medium-speed pulverizer outlet temperature, and by primary air pressure
The output of power set point correct amount chain control logic is incorporated into the First air that optimization is controlled based on medium-speed pulverizer outlet temperature
As the correction of primary air pressure control in pressure set points correction control loop interface；
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
Mouthful temperature control 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 to be included：Middling speed
Pulverizer outlet temperature actual measured value A, medium-speed pulverizer outlet temperature is manually set value desired value B, calculates the difference of A and B
C, PID arithmetic is carried out 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 to be included：Medium-speed pulverizer outlet temperature actual measured value A,
Medium-speed pulverizer outlet temperature is manually set value desired value D, calculates difference E of A and D, and PID arithmetic, PID fortune are carried out to difference E
Calculation show that the heat primary air of medium-speed pulverizer outlet temperature adjusts door opening degree instruction.
Medium-speed pulverizer heat primary air described in second step adjusts the aperture chain control logic of door to be included：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 is 100, and the range of accommodation for controlling heat primary air regulation 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 is 100, and the range of accommodation for controlling heat primary air regulation 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 is included when medium-speed pulverizer is exported
When temperature actual measured value A is higher than alarming value, while heat primary air adjusts door aperture reaches lower limit, and cold First air is adjusted
Door aperture reaches higher limit, 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 f1X () is realized, when medium-speed pulverizer outlet temperature reality
When border measured value A is less than alarming value, while heat primary air adjusts door aperture reaches higher limit, and cold First air adjusts door aperture
Lower limit 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 by the function f of medium-speed pulverizer outlet temperature actual measured value A2(x) realize, when medium-speed pulverizer outlet First air speed it is little
When L, chain triggering primary air pressure set point correct amount C effectively, 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 value3X () is realized.
Described cold First air adjusts the algorithm logic that door, heat primary air adjust door and primary air pressure set point correct amount
It is：Medium-speed pulverizer outlet temperature actual measured value, cold First air adjusts door aperture, and heat primary air adjusts door aperture, medium-speed pulverizer
Coal machine entrance primary air pressure, medium-speed pulverizer outlet First air speed can directly slave group distributed monitoring control system it is real-time
Read in data base；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 outlet First air speed is less than K, medium-speed pulverizer outlet temperature reality
Measured value A is higher than alarming value, and heat primary air adjusts door aperture and reaches lower limit, and cold First air adjusts door aperture and reaches higher limit,
Medium-speed pulverizer outlet temperature actual measured value A is less than alarming value, and heat primary air adjusts door aperture and reaches higher limit, cold First air
Adjust door aperture and reach lower limit, medium-speed pulverizer outlet First air speed is less than L, is drawn by logical judgment；f1X () is non-thread
Property functional generator, its input be medium-speed pulverizer outlet temperature actual measured value A, be output 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, with intermittent fever once
Wind adjusts door aperture and reaches lower limit, and cold First air adjusts door aperture and reaches higher limit；f2X () is nonlinear function generation
Device, its input is medium-speed pulverizer outlet temperature actual measured value, is output 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 opening
Degree reaches higher limit, and cold First air adjusts door aperture and reaches lower limit；f3X () is non-linear function generator, its input
First air speed actual measured value is exported for medium-speed pulverizer, primary air pressure set point correct amount C is output as, output is effectively needed
Meet following condition：Medium-speed pulverizer outlet First air speed is less than L；f1(x)、f2(x)、f3X the parameter of () can be according to real-time song
Line on-line tuning, the principle adjusted is by existing unit distributed monitoring control system coordinated control system, it is ensured that unit is in operation
During, medium-speed pulverizer outlet temperature is controlled in the reasonable scope automatically.
The core concept of the present invention is to adjust gate control logic, heat primary air by designing the cold First air of medium-speed pulverizer
Gate control logical sum primary air pressure set point correct amount control logic is adjusted, realizes that the cold First air of control adjusts door, heat once
Wind adjusts door, the control actuator coordination of primary air fan outlet pressure and ensures that medium-speed pulverizer outlet temperature meets requirement,
So as to realize giving full play to equipment potential, while service requirement is met, it is ensured that unit medium-speed pulverizer outlet temperature it is steady
It is qualitative.
Cold First air adjusts door and heat primary air adjusts door algorithm logic figure, i.e. fired power generating unit medium-speed pulverizer in the present invention
The cold First air of outlet temperature control optimization method adjusts door and heat primary air regulation gate control logic is as shown in Figure 1.In Fig. 1,
Medium-speed pulverizer outlet temperature actual measured value, cold First air adjusts door aperture, and heat primary air adjusts door aperture, medium-speed pulverizer
Entrance primary air pressure directly can be read in slave group distributed monitoring control system real-time data base；Switching condition：Cold First air
Adjust door aperture and be 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 outlet First air speed is less than K, is drawn by logical 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 of control optimization method is as shown in Figure 2.In Fig. 2, medium-speed pulverizer outlet temperature
Degree actual measured value, cold First air adjusts door aperture, and heat primary air adjusts door aperture, and medium-speed pulverizer outlet First air speed is equal
Directly can read in slave group distributed monitoring control system real-time data base；Switching condition：Medium-speed pulverizer outlet temperature is actual to be surveyed
Value A is higher than alarming value, and heat primary air adjusts door aperture and reaches lower limit, and cold First air adjusts door aperture and reaches higher limit, in
Speed coal mill outlet temperature actual measured value A is less than alarming value, and heat primary air adjusts door aperture and reaches higher limit, and cold First air is adjusted
Section door aperture reaches lower limit, and medium-speed pulverizer outlet First air speed is less than L, is drawn by logical judgment；f1X () is non-linear
Functional generator, its input is medium-speed pulverizer outlet temperature actual measured value A, is output 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
Adjust door aperture and reach lower limit, and cold First air adjusts door aperture and reaches higher limit；f2X () is nonlinear function generation
Device, its input is medium-speed pulverizer outlet temperature actual measured value, is output 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 opening
Degree reaches higher limit, and cold First air adjusts door aperture and reaches lower limit；f3X () is non-linear function generator, its input
First air speed actual measured value is exported for medium-speed pulverizer, primary air pressure set point correct amount C is output as, output is effectively needed
Meet following condition：Medium-speed pulverizer outlet First air speed is less than L；f1(x)、f2(x)、f3X the parameter of () can be according to real-time song
Line on-line tuning, the principle adjusted is by existing unit distributed monitoring control system coordinated control system, it is ensured that unit is in operation
During, medium-speed pulverizer outlet temperature is controlled in the reasonable scope automatically.
Below by taking the control of certain 300MW fired power generating unit medium-speed pulverizers outlet temperature as an example, introduce algorithm parameter and adjust 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 malleation, is furnished with 5 mills
Coal machine, every coal pulverizer configures a heat primary air and adjusts door and a cold First air regulation door, is provided with the one of two 50% capacity
Secondary blower fan provides once heat, cold wind pulverized coal conveying.
As shown in table 1, table 1 is cold First air regulation door, heat primary air regulation door and the primary air pressure of medium-speed pulverizer
Set point correct amount control parameter is adjusted.
With f in table 11X () corresponding x is medium-speed pulverizer outlet temperature actual measured value（℃）；With f2X () corresponding x is
Medium-speed pulverizer outlet temperature actual measured value（℃）；With f3X () 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 adjusts door aperture, heat primary air
Adjust door aperture, medium-speed pulverizer outlet First air speed can directly in slave group distributed monitoring control system real-time data base
Read；Unit medium-speed pulverizer outlet temperature control loop Logical Configuration is completed, system is put into into actual motion, transported according to unit
Row curve, repeatedly on-line tuning f1(x)、f2(x)、f3(x) relevant parameter, it is ensured that unit while load responding fast and stable,
Automatically by main steam pressure control in the reasonable scope；Field adjustable process is simple, is easy to Project Realization.
Claims (5)
1. fired power generating unit medium-speed pulverizer outlet temperature control optimization method, is characterized in that, in fired power generating unit scattered control system
The cold First air that medium-speed pulverizer is set up in the control logic configuration of DCS adjusts gate control logic, heat primary air regulation gate control
Logical sum primary air pressure set point correct amount control logic, controls cold First air and adjusts door, heat primary air regulation door and
Secondary fan outlet Stress control actuator, 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 and adjusts
Section 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；
3rd step：Increase base in the control logic primary air pressure control loop configuration of fired power generating unit distributed monitoring control system
The primary air pressure set point correct amount control loop interface of optimization is controlled in medium-speed pulverizer outlet temperature, and by primary air pressure
The output of power set point correct amount chain control logic is incorporated into the First air that optimization is controlled based on medium-speed pulverizer outlet temperature
As the correction of primary air pressure control in pressure set points correction control loop interface；
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
Mouthful temperature control 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 to be included：Medium-speed pulverizer outlet temperature
Degree actual measured value A, medium-speed pulverizer outlet temperature is manually set value desired value B, calculates difference C of A and B, and 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 is exported
The heat primary air of temperature adjusts door PID regulator to be included：Medium-speed pulverizer outlet temperature actual measured value A, medium-speed pulverizer goes out
Mouth temperature is manually set value desired value D, calculates difference E of A and D, and to difference E PID arithmetic is carried out, and PID arithmetic draws 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, medium-speed pulverizer heat primary air adjusts the aperture chain control logic of door to be included：When medium-speed pulverizer outlet
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
Spend for G, the upper limit is 100, it is G ~ 100 to control heat primary air and adjust the range of accommodation of door PID regulator, when medium-speed pulverizer outlet
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
Spend for I, the upper limit is 100, it is I ~ 100 to control heat primary air and adjust the range of accommodation of door PID regulator, 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
The locking of door PID regulator 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 actual
When value A is higher than alarming value, while heat primary air adjusts door aperture reaches lower limit, and cold First air adjusts door aperture and reaches
Higher limit, chain triggering primary air pressure set point correct amount A effectively, 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 A1X () is realized, when medium-speed pulverizer outlet temperature actual measured value A
During less than alarming value, while heat primary air adjusts door aperture reaches higher limit, and cold First air adjusts door aperture and reaches lower limit
Value, effectively, the range value of this primary air pressure set point correct amount is by middling speed for chain triggering primary air pressure set point correct amount B
The function f of pulverizer outlet temperature actual measured value A2X () is realized, when medium-speed pulverizer outlet First air speed is less than L, even
Effectively, the range value of this primary air pressure set point correct amount is by middling speed coal-grinding for lock triggering primary air pressure set point correct amount C
Machine exports the function f of First air speed actual measured value3X () is realized.
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 the algorithm logic of door, heat primary air regulation door and primary air pressure set point correct amount：Medium-speed pulverizer
Coal machine outlet temperature actual measured value, cold First air adjusts 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 directly reading in slave group distributed monitoring control system real-time data base
Take；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 outlet First air speed is less than K, and medium-speed pulverizer outlet temperature actual measured value A is higher than
Alarming value, heat primary air adjusts door aperture and reaches lower limit, and cold First air adjusts door aperture and reaches higher limit, 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 higher limit, and cold First air adjusts door aperture and arrives
Up to lower limit, medium-speed pulverizer outlet First air speed is less than L, is drawn by logical judgment；f1X () is nonlinear function generation
Device, its input is medium-speed pulverizer outlet temperature actual measured value A, is output 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 opening
Degree reaches lower limit, and cold First air adjusts door aperture and reaches higher limit；f2X () is non-linear function generator, its input
For medium-speed pulverizer outlet temperature actual measured value, primary air pressure set point correct amount B is output as, under output effectively need to meet
Row condition：Medium-speed pulverizer outlet temperature actual measured value A is less than alarming value, while heat primary air adjusts door aperture reaches the upper limit
Value, and cold First air adjusts door aperture arrival lower limit；f3X () is non-linear function generator, its input is middling speed coal-grinding
Machine exports First air speed actual measured value, is output as primary air pressure set point correct amount C, and output need to effectively meet following bar
Part：Medium-speed pulverizer outlet First air speed is less than L；f1(x)、f2(x)、f3X the parameter of () can be whole online according to real-time curve
Fixed, the principle adjusted is by existing unit distributed monitoring control system coordinated control system, it is ensured that unit in running,
Automatically medium-speed pulverizer outlet temperature is controlled in the reasonable scope.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107262261A (en) * | 2017-07-12 | 2017-10-20 | 华北电力大学（保定） | A kind of coal pulverizer air quantity control method for adapting to fired power generating unit Ultra-low load operation |
| CN110779003A (en) * | 2019-05-20 | 2020-02-11 | 中国神华能源股份有限公司 | Peak regulation method of thermal power generating unit |
| CN113028441A (en) * | 2021-03-17 | 2021-06-25 | 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 |
| CN114534901A (en) * | 2022-03-01 | 2022-05-27 | 华能上海石洞口发电有限责任公司 | Coal mill primary air control logic optimization method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60111814A (en) * | 1983-11-24 | 1985-06-18 | Hitachi Ltd | Primary air flow amount minimum lock circuit in coal burning boiler |
| JPH07260136A (en) * | 1994-03-23 | 1995-10-13 | Mitsubishi Heavy Ind Ltd | Coal level controlling method for tube mill |
| CN102671740A (en) * | 2012-05-07 | 2012-09-19 | 章礼道 | Intelligent roller type medium speed coal mill |
| CN103292342A (en) * | 2013-05-31 | 2013-09-11 | 大唐甘谷发电厂 | Method for co-combusting Xinjiang Guanghui lignite in combusting bitumite boiler |
| CN104238494A (en) * | 2014-07-29 | 2014-12-24 | 国家电网公司 | Thermal power generating unit coal feed amount control method based on frequency modulation and peak regulation of power grid |
| CN104646167A (en) * | 2015-01-20 | 2015-05-27 | 浙江大学 | Primary air pressure self-adaptive control method |
| CN204388908U (en) * | 2015-01-22 | 2015-06-10 | 沈阳大学 | A kind of power station coal pulverizer duty on-Line Monitor Device |
| CN105318349A (en) * | 2014-07-29 | 2016-02-10 | 国家电网公司 | Primary air quantity control method based on grid frequency modulation and peak load regulation and applied to thermal power unit |
| CN105372991A (en) * | 2015-11-25 | 2016-03-02 | 国家电网公司 | Heat supply unit multi-coal mixed combustion condition main steam pressure fluctuation-overcoming control method |
-
2016
- 2016-11-22 CN CN201611030513.2A patent/CN106594793B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60111814A (en) * | 1983-11-24 | 1985-06-18 | Hitachi Ltd | Primary air flow amount minimum lock circuit in coal burning boiler |
| JPH07260136A (en) * | 1994-03-23 | 1995-10-13 | Mitsubishi Heavy Ind Ltd | Coal level controlling method for tube mill |
| CN102671740A (en) * | 2012-05-07 | 2012-09-19 | 章礼道 | Intelligent roller type medium speed coal mill |
| CN103292342A (en) * | 2013-05-31 | 2013-09-11 | 大唐甘谷发电厂 | Method for co-combusting Xinjiang Guanghui lignite in combusting bitumite boiler |
| CN104238494A (en) * | 2014-07-29 | 2014-12-24 | 国家电网公司 | Thermal power generating unit coal feed amount control method based on frequency modulation and peak regulation of power grid |
| CN105318349A (en) * | 2014-07-29 | 2016-02-10 | 国家电网公司 | Primary air quantity control method based on grid frequency modulation and peak load regulation and applied to thermal power unit |
| CN104646167A (en) * | 2015-01-20 | 2015-05-27 | 浙江大学 | Primary air pressure self-adaptive control method |
| CN204388908U (en) * | 2015-01-22 | 2015-06-10 | 沈阳大学 | A kind of power station coal pulverizer duty on-Line Monitor Device |
| CN105372991A (en) * | 2015-11-25 | 2016-03-02 | 国家电网公司 | Heat supply unit multi-coal mixed combustion condition main steam pressure fluctuation-overcoming control method |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107262261A (en) * | 2017-07-12 | 2017-10-20 | 华北电力大学（保定） | A kind of coal pulverizer air quantity control method for adapting to fired power generating unit Ultra-low load operation |
| CN110779003A (en) * | 2019-05-20 | 2020-02-11 | 中国神华能源股份有限公司 | Peak regulation method of thermal power generating unit |
| 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 |
| CN113028441A (en) * | 2021-03-17 | 2021-06-25 | 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 |
| 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 |
| CN114534901A (en) * | 2022-03-01 | 2022-05-27 | 华能上海石洞口发电有限责任公司 | Coal mill primary air control logic optimization method |
| 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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