CN103712235B - A kind of control method of primary air fan and device - Google Patents
A kind of control method of primary air fan and device Download PDFInfo
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- CN103712235B CN103712235B CN201310739782.6A CN201310739782A CN103712235B CN 103712235 B CN103712235 B CN 103712235B CN 201310739782 A CN201310739782 A CN 201310739782A CN 103712235 B CN103712235 B CN 103712235B
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Abstract
The invention discloses a kind of control method of primary air fan, belong to control technology field.Described method comprises: start current control period; Obtain setting air quantity and actual air volume; Obtain the first setting value SP1, described SP1 equals setting air quantity sum; Obtain the first measured value PV1, described PV1 equals actual air volume sum; Baffle opening adjusted value is obtained by carrying out the first PID PID arithmetic to described SP1 and described PV1; Obtain baffle opening currency; Obtain the baffle opening desired value of primary air fan corresponding to described coal pulverizer; Obtain baffle opening limiting value; Judge whether described baffle opening desired value is greater than described baffle opening limiting value, if so, then the baffle opening of primary air fan is updated to described baffle opening limiting value, if not, then the baffle opening of primary air fan is updated to described baffle opening desired value; Terminate current control period, start next control cycle.It is minimum that the present invention makes air door restriction loss be down under the prerequisite ensureing coal pulverizer air quantity, thus saved electric energy.
Description
Technical field
The present invention relates to air-blower control technical field, particularly a kind of control method of primary air fan and device.
Background technology
Primary air fan is the visual plant of heat power station, for providing the First air of certain flow to coal pulverizer, makes coal pulverizer bring coal dust into boiler furnace by this First air.
Under automatic switching arc manipulation part, the blast that primary air fan exports by the primary air fan autocontrol method of existing boiler of power plant, as control variables, realizes controlling discharge pressure of fan by the baffle opening adjusting primary air fan, and then realizes controlling coal pulverizer input air quantity.
Realizing in process of the present invention, inventor finds that prior art at least exists following problem:
The coal of easy mill due to coal pulverizer resistance little, coal pulverizer only needs less blast just can bring coal dust into boiler combustion indoor, therefore need to turn down coal pulverizer air door to reduce the entrance blast of coal pulverizer, air door turns down, and causes the restriction loss that primary air fan discharge quantity of fan is unnecessary, causes waste of energy; The coal of difficult mill then may also not reach the air quantity that coal pulverizer requires by coal pulverizer full trrottle, and not only affect mill coal pulverizer system and normally run, reduction pulverizer capacity of sometimes also having to, affects the normal operation of generating set.
Summary of the invention
In order to solve the problem of prior art, embodiments provide a kind of control method and control device of primary air fan.Described technical scheme is as follows:
On the one hand, provide a kind of control method of primary air fan, described method comprises:
Start current control period;
Obtain setting air quantity and actual air volume that Boiler pressure control state is the coal pulverizer of auto state;
Obtain the first setting value SP1, described SP1 equals the setting air quantity sum that all Boiler pressure control states are the coal pulverizer of auto state;
Obtain the first measured value PV1, described PV1 equals the actual air volume sum that all Boiler pressure control states are the coal pulverizer of auto state;
By carrying out to described SP1 and described PV1 the baffle opening adjusted value that the first PID PID arithmetic obtains primary air fan corresponding to described coal pulverizer;
Obtain the baffle opening currency of primary air fan corresponding to described coal pulverizer;
By carrying out to described baffle opening currency and described baffle opening adjusted value the baffle opening desired value that the second PID PID arithmetic obtains primary air fan corresponding to described coal pulverizer;
Obtain the baffle opening limiting value of primary air fan corresponding to described coal pulverizer;
Judge whether described baffle opening desired value is greater than described baffle opening limiting value, if so, then the baffle opening of primary air fan corresponding for described coal pulverizer be updated to described baffle opening limiting value,
If not, then the baffle opening of primary air fan corresponding for described coal pulverizer is updated to described baffle opening desired value;
Terminate current control period, start next control cycle.
On the other hand, provide a kind of control device of primary air fan, described device comprises:
Start module, for starting current control period;
First acquisition module, for obtaining the setting air quantity and actual air volume that Boiler pressure control state is the coal pulverizer of auto state;
Second acquisition module, for obtaining the first setting value SP1, described SP1 equals the setting air quantity sum that all Boiler pressure control states are the coal pulverizer of auto state;
3rd acquisition module, for obtaining the first measured value PV1, described PV1 equals the actual air volume sum that all Boiler pressure control states are the coal pulverizer of auto state;
4th acquisition module, adjusts aperture adjusted value for the baffle opening obtaining primary air fan corresponding to described coal pulverizer by carrying out the first PID PID arithmetic to described second the acquisition module SP1 obtained and the PV1 that described 3rd acquisition module obtains;
5th acquisition module, for obtaining the baffle opening currency of primary air fan corresponding to described coal pulverizer;
6th acquisition module, the baffle opening adjusted value obtained for the baffle opening currency by obtaining described 5th acquisition module and described 4th acquisition module carries out the baffle opening desired value that the second PID PID arithmetic obtains primary air fan corresponding to described coal pulverizer;
7th acquisition module, for obtaining the baffle opening limiting value of primary air fan corresponding to described coal pulverizer;
Judge module, for judging whether the baffle opening desired value of described 6th acquisition module acquisition is greater than the baffle opening limiting value of described 7th acquisition module acquisition, if, then the baffle opening of primary air fan corresponding for described coal pulverizer is updated to the baffle opening limiting value that described 7th acquisition module obtains
If not, then the baffle opening of primary air fan corresponding for described coal pulverizer is updated to the baffle opening desired value that described 6th acquisition module obtains;
Described startup module, also for terminating current control period, starts next control cycle.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
The primary air fan control method that the embodiment of the present invention proposes, avoid in prior art using discharge pressure of fan as control variables to control the way of primary air fan discharge quantity of fan, replace directly using air quantity as control variables, coal pulverizer is set the summation of air quantity as control criterion (setting value), comprehensive as feedback variable (measured value) using coal pulverizer actual air volume, adjusts the discharge quantity of fan of primary air fan by contrast setting air quantity summation and actual air volume summation.By above measure, can avoid in prior art when coal pulverizer resistance hour must reduce the entrance blast of coal pulverizer and the waste of energy caused, although also can avoid the coal pulverizer air door standard-sized sheet when coal pulverizer resistance is large but still not reach requiring air quantity by turning down coal pulverizer air door.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the control method flow chart of a kind of blower fan that the embodiment of the present invention one provides;
Fig. 2 a is the control method flow chart of a kind of blower fan that the embodiment of the present invention two provides;
Fig. 2 b is the control logic design drawing of a kind of blower fan that the embodiment of the present invention two provides;
Fig. 3 is the control device structural representation of a kind of blower fan that the embodiment of the present invention three provides;
Fig. 4 is the control device structural representation of a kind of blower fan that the embodiment of the present invention four provides.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment one
Present embodiments provide a kind of control method of primary air fan, see Fig. 1, the method flow that the present embodiment provides is specific as follows:
S101, starts current control period.
S102, obtains setting air quantity and actual air volume that Boiler pressure control state is the coal pulverizer of auto state.
During the boiler operatiopn in thermal power plant, coal pulverizer is to the indoor pulverized coal conveying of boiler combustion.Raw coal is ground to form coal dust by described coal pulverizer, and the most of hot blast be then blown into by primary air fan and small part cold wind are dry and bring described boiler furnace into by coal dust.Usually, a 300MW and above firepower unit comprise 6 coal pulverizers and 2 primary air fans, and time at full capacity, 5 coal pulverizers run, and 2 primary air fans are jointly to the coal pulverizer heat air delivery run and small part cold wind.
The Boiler pressure control state of described coal pulverizer comprises: manual mode and auto state.Manual mode refers to and inputs First air by operating personnel's Non-follow control primary air fan to described coal pulverizer, and auto state refers to that controlling primary air fan by computer inputs First air to described coal pulverizer.
In order to ensure the normal operation of thermal power generation unit, described coal pulverizer needs the coal dust to boiler furnace conveying specified quantitative within the unit interval.Described setting air quantity is described coal pulverizer within the unit interval to air quantity corresponding during boiler furnace conveying specified quantitative coal dust.
The setting air quantity of coal pulverizer is set according to the coal-supplying amount of coal pulverizer by control system, and such as coal-supplying amount is larger, and setting air quantity is also larger; Under same load, run coal pulverizer number of units more, the total setting air quantity of coal pulverizer is also relatively large.
Due to the fluctuation of coal-supplying amount and the impact of raw coal nonhomogeneous hardness, the actual air volume of coal pulverizer can not remain setting air quantity usually, such as: if the less and easy grinds of raw coal hardness, then the resistance of coal pulverizer is less, the lower coal pulverizer actual air volume that can make of coal pulverizer inlet primary air pressure reaches setting air quantity, and now cold-hot air door will close smaller; If raw coal hardness grinds more greatly and not easily, then the resistance of coal pulverizer is comparatively large, and cold-hot air door standard-sized sheet also not necessarily can make coal pulverizer actual air volume reach setting air quantity.。
S103, obtains the first setting value SP1, and described SP1 equals the setting air quantity sum that all Boiler pressure control states are the coal pulverizer of auto state.
S104, obtains the first measured value PV1, and described PV1 equals the actual air volume sum that all Boiler pressure control states are the coal pulverizer of auto state.
S105, by carrying out to described SP1 and described PV1 the baffle opening adjusted value that the first PID PID arithmetic obtains primary air fan corresponding to described coal pulverizer.
Usually, a primary air fan movable vane or baffle opening instruction can be generated by carrying out the first PID PID arithmetic to described SP1 and described PV1, in this instruction, carrying baffle opening adjusted value.
The general principle that PID (ProportionIntegrationDifferentiation) controls is contrasted measured value PV (ProcessValue) and setting value SP (setPoint), then exports corresponding output valve OP (OutputValue).
The effect of baffle plate is the air quantity of adjustment primary air fan to coal pulverizer input First air, and baffle opening is larger, then the air quantity that inputs to coal pulverizer of primary air fan is larger, and baffle opening is less, then the air quantity that inputs to coal pulverizer of primary air fan is less.
By carrying out to described SP1 and described PV1 the baffle opening adjusted value that the first PID arithmetic obtains corresponding primary air fan.Particularly, if described PV1 is greater than described SP1, then need the baffle opening reducing described primary air fan, described baffle opening adjusted value will reduce; If described PV1 is less than described SP1, then need the baffle opening increasing described primary air fan, described baffle opening adjusted value will increase.
S106, obtains the baffle opening currency of primary air fan corresponding to described coal pulverizer.
S107, by carrying out to described baffle opening currency and described baffle opening adjusted value the baffle opening desired value that the second PID PID arithmetic obtains primary air fan corresponding to described coal pulverizer.
S108, obtains the baffle opening limiting value of primary air fan corresponding to described coal pulverizer.
The baffle opening of primary air fan is larger, then the air quantity of primary air fan output is larger, and the blast of output is also higher.If the discharge pressure of fan of primary air fan is excessive, concerning axial fan, primary air pressure is too high likely causes described primary air fan generation surge.Therefore need to arrange baffle opening limiting value to ensure that described primary air fan can normally run.
S109, judges whether described baffle opening desired value is greater than described baffle opening limiting value, if so, then the baffle opening of primary air fan corresponding for described coal pulverizer is updated to described baffle opening limiting value,
If not, then the baffle opening of primary air fan corresponding for described coal pulverizer is updated to described baffle opening desired value.
When described baffle opening desired value is greater than described baffle opening limiting value, be axial fan for described primary air fan, primary air pressure is too high likely there is surge.Surge is a kind of abnormal operational conditions of blower fan, very harmful to blower fan.Therefore for ensureing the safe operation of described primary air fan, the baffle opening of described primary air fan should be set to described baffle opening limiting value.
S110, terminates current control period, starts next control cycle.
In fired power generating unit, maintain the main purpose that certain discharge pressure of fan is not primary air fan, the Main Function of primary air fan is to provide coal pulverizer and grinds air quantity needed for coal dust, and only this needs certain primary air pressure and ensures.The primary air fan control method that the embodiment of the present invention proposes, avoid in prior art using discharge pressure of fan as control variables to control the way of primary air fan discharge quantity of fan, replace directly using air quantity as control variables, coal pulverizer is set the summation of air quantity as control criterion (setting value), comprehensive as feedback variable (measured value) using coal pulverizer actual air volume, adjusts the discharge quantity of fan of primary air fan by contrast setting air quantity summation and actual air volume summation.By above measure, can avoid in prior art when coal pulverizer resistance hour must reduce the entrance blast of coal pulverizer and the waste of energy caused, although also can avoid the coal pulverizer air door standard-sized sheet when coal pulverizer resistance is large but still not reach requiring air quantity by turning down coal pulverizer air door.
Embodiment two
Present embodiments provide a kind of control method of primary air fan, see Fig. 2 a, the method flow that the present embodiment provides is specific as follows:
S201, starts current control period.
S202, obtains setting air quantity and actual air volume that Boiler pressure control state is the coal pulverizer of auto state.
S203, obtains the first setting value SP1, and described SP1 equals the setting air quantity sum that all Boiler pressure control states are the coal pulverizer of auto state.
S204, obtains the first measured value PV1, and described PV1 equals the actual air volume sum that all Boiler pressure control states are the coal pulverizer of auto state.
S205, obtains air quantity correction factor.
Described air quantity correction factor is used for revising described PV1.Described air quantity correction factor rule of thumb can be preset by operating personnel.
Preferably, described acquisition air quantity correction factor specifically comprises the present embodiment:
S2051, obtain the hot air disperser instruction or the hot air disperser open degree feedback that are in the coal pulverizer of running status, described hot air disperser instruction or hot air disperser open degree feedback comprise the hot air disperser aperture of described coal pulverizer.
The air quantity of First air of hot air disperser for controlling coal pulverizer and receiving from primary air fan, if described hot air disperser aperture is larger, then the air quantity of First air that receives from primary air fan of coal pulverizer is larger, if described hot air disperser aperture is less, then the air quantity of First air that receives from primary air fan of coal pulverizer is less.
S2052, obtains the second measured value PV2, is in the hot air disperser aperture maximum in hot air disperser aperture corresponding to the coal pulverizer of running status described in described PV2 equals.
Hot air disperser aperture maximum is selected from all hot air disperser instructions or hot air disperser feedback.
S2053, obtains the second setting value SP2.
Described second setting value SP2 rule of thumb can be preset by operating personnel.
S2054, obtains air quantity correction initial coefficients by carrying out the 3rd PID PID arithmetic to described SP2 and described PV2.
S2055, described air quantity correction initial coefficients is converted into described air quantity correction factor by the transfer function according to presetting.
Usually, the air quantity correction initial coefficients P exported through PID arithmetic is standard signal 0 ~ 100, and described transfer function fx1 is used for the air quantity correction factor Q standard signal that PID arithmetic exports being converted to 0.90 ~ 1.10.Particularly, transfer function fx1 is: Q=0.002P+0.9.
S206, calculates the product of described PV1 and described air quantity correction factor, and the value of described PV1 is updated to this product.
The object of this step is the actual air volume summation (i.e. described PV1) of the coal pulverizer of auto state by all hot air disperser aperture maximum correction all Boiler pressure control states being in the coal pulverizer of running status.Under ensureing that each coal pulverizer air quantity meets the prerequisite of setting air quantity requirement, by revising the SR that can reduce to greatest extent when First air enters coal pulverizer, thus reduce the power consumption of primary air fan.
S207, by carrying out to described SP1 and described PV1 the baffle opening adjusted value that the first PID PID arithmetic obtains primary air fan corresponding to described coal pulverizer.
S208, obtains the baffle opening currency of primary air fan corresponding to described coal pulverizer.
S209, by carrying out to described baffle opening currency and described baffle opening adjusted value the baffle opening desired value that the second PID PID arithmetic obtains primary air fan corresponding to described coal pulverizer.
Cross conference cause surge to occur because primary air fan exports a pressure, therefore described primary air fan can be about to outlet primary air pressure when there is surge as limiting value.
Correspondingly, described primary air fan is obtained by primary air pressure when there is surge as output primary air pressure limiting value.
S210, obtains the baffle opening limiting value of primary air fan corresponding to described coal pulverizer.
The effect of described baffle plate is the air quantity that adjustment primary air fan inputs to coal pulverizer, and described baffle opening is larger, then the discharge quantity of fan of corresponding primary air fan is larger, and described baffle opening is less, then the discharge quantity of fan of corresponding primary air fan is less.
The present embodiment preferably, method by experiment can obtain correlation function fx2 between described primary air fan outlet pressure and baffle opening.By when known primary air pressure, baffle opening corresponding to described primary air fan can be obtained by described correlation function fx2.
S211, judges whether described baffle opening desired value is greater than described baffle opening limiting value, if so, then the baffle opening of primary air fan corresponding for described coal pulverizer is updated to described baffle opening limiting value,
If not, then the baffle opening of primary air fan corresponding for described coal pulverizer is updated to described baffle opening desired value.
S212, terminates current control period, starts next control cycle.
S213, whether the coal pulverizer that monitoring is in auto state there is tripping operation or state of a control conversion, if so, then:
The the first setting air quantity being in the coal pulverizer of auto state after obtaining tripping operation or after state of a control conversion is newly worth NSP1 and the first actual air volume is newly worth NPV1;
The setting air quantity obtained between described SP1 and described NSP1 changes array { SP1
i, the actual air volume obtained between described PV1 and described NPV1 changes array { PV1
i; Described { SP1
iin element S P1
ifor the numerical value in NSP1 described headed by the described SP1 change sequence that is tail, described { PV1
iin element PV1
ifor the numerical value in NPV1 described headed by the described PV1 change sequence that is tail; Wherein, i=1,2,3 ..., n, n are described { SP1
iand described { PV1
iin the number of element;
N-1 after current control period takes turns in control cycle, and described SP1 equals SP1 successively
2, SP1
3, SP1
4..., SP1
n; Described PV1 equals PV1 successively
2, PV1
3, PV1
4..., PV1
n;
From n-th after current control period takes turns control cycle, described SP1 equals the setting air quantity sum that all Boiler pressure control states are the coal pulverizer of auto state; Described PV1 equals the actual air volume sum that all Boiler pressure control states are the coal pulverizer of auto state.
Especially, the Boiler pressure control state of the coal pulverizer related in the embodiment of the present invention M/A device that can manually automatically switch controls.
Fig. 2 b shows the logic diagram designed based on the control method that provides by the embodiment of the present invention.
The method that the embodiment of the present invention provides is using air quantity as on the basis of control variables, by hot air disperser aperture maximum correction actual air volume summation (i.e. described PV), can be implemented under ensureing that each coal pulverizer air quantity meets the prerequisite of setting air quantity requirement, air door restriction loss is down to minimum, thus has saved electric energy.
Embodiment three
Present embodiments provide a kind of control device of primary air fan, see Fig. 3, this device comprises:
Start module 301, for starting current control period;
First acquisition module 302, for obtaining the setting air quantity and actual air volume that Boiler pressure control state is the coal pulverizer of auto state;
Second acquisition module 303, for obtaining the first setting value SP1, described SP1 equals the setting air quantity sum that all Boiler pressure control states are the coal pulverizer of auto state;
3rd acquisition module 304, for obtaining the first measured value PV1, described PV1 equals the actual air volume sum that all Boiler pressure control states are the coal pulverizer of auto state;
4th acquisition module 305, adjusts aperture adjusted value for the baffle opening obtaining primary air fan corresponding to described coal pulverizer by carrying out the first PID PID arithmetic to described second acquisition module 303 SP1 obtained and the PV1 that described 3rd acquisition module 304 obtains;
5th acquisition module 306, for obtaining the baffle opening currency of primary air fan corresponding to described coal pulverizer;
6th acquisition module 307, the baffle opening adjusted value obtained for the baffle opening currency by obtaining described 5th acquisition module 306 and described 4th acquisition module 305 carries out the baffle opening desired value that the second PID PID arithmetic obtains primary air fan corresponding to described coal pulverizer;
7th acquisition module 308, for obtaining the baffle opening limiting value of primary air fan corresponding to described coal pulverizer;
Judge module 309, for judging whether the baffle opening desired value of described 6th acquisition module 307 acquisition is greater than the baffle opening limiting value of described 7th acquisition module 308 acquisition, if, then the baffle opening of primary air fan corresponding for described coal pulverizer is updated to the baffle opening limiting value that described 7th acquisition module 308 obtains
If not, then the baffle opening of primary air fan corresponding for described coal pulverizer is updated to the baffle opening desired value that described 6th acquisition module 307 obtains;
Described startup module 301, also for terminating current control period, starts next control cycle.
Embodiment four
Present embodiments provide a kind of control device of primary air fan, see Fig. 4, this device comprises:
Start module 401, for starting current control period.
First acquisition module 402, for obtaining the setting air quantity and actual air volume that Boiler pressure control state is the coal pulverizer of auto state.
Second acquisition module 403, for obtaining the first setting value SP1, described SP1 equals the setting air quantity sum that all Boiler pressure control states are the coal pulverizer of auto state.
3rd acquisition module 404, for obtaining the first measured value PV1, described PV1 equals the actual air volume sum that all Boiler pressure control states are the coal pulverizer of auto state.
8th acquisition module 405, for obtaining air quantity correction factor.
Particularly, described 8th acquisition module 405 specifically comprises:
First obtains submodule 4051, and for obtaining hot air disperser instruction or the hot air disperser open degree feedback of the coal pulverizer being in running status, described hot air disperser instruction or hot air disperser open degree feedback comprise the hot air disperser aperture of described coal pulverizer;
Second obtains submodule 4052, for obtaining the second measured value PV2, is in the hot air disperser aperture maximum in hot air disperser aperture corresponding to the coal pulverizer of running status described in described PV2 equals;
3rd obtains submodule 4053, for obtaining the second setting value SP2;
4th obtains submodule 4054, and the PV2 for obtaining by obtaining submodule 4052 to the SP2 and described second of described 3rd acquisition submodule 4053 acquisition carries out the 3rd PID PID arithmetic and obtains air quantity correction initial coefficients;
5th transform subblock, for being converted into described air quantity correction factor according to the transfer function preset by the air quantity correction initial coefficients that described 4th acquisition submodule 4054 obtains;
More new module 406, the product of the air quantity correction factor that PV1 and described 8th acquisition module 405 for calculating described 3rd acquisition module 404 acquisition obtain, and the value of described PV1 is updated to this product.
4th acquisition module 407, adjusts aperture adjusted value for the baffle opening obtaining primary air fan corresponding to described coal pulverizer by carrying out the first PID PID arithmetic to described second acquisition module 403 SP1 obtained and the PV1 that described more new module 406 obtains.
5th acquisition module 408, for obtaining the baffle opening currency of primary air fan corresponding to described coal pulverizer.
6th acquisition module 409, the baffle opening adjusted value obtained for the baffle opening currency by obtaining described 5th acquisition module 408 and described 4th acquisition module 407 carries out the baffle opening desired value that the second PID PID arithmetic obtains primary air fan corresponding to described coal pulverizer.
7th acquisition module 410 is specifically for obtaining the discharge pressure of fan limiting value of primary air fan corresponding to described coal pulverizer;
Correlation function according to presetting obtains baffle opening limiting value corresponding to described discharge pressure of fan limiting value.
Judge module 411, for judging whether the baffle opening desired value of described 6th acquisition module 409 acquisition is greater than the baffle opening limiting value of described 7th acquisition module 410 acquisition, if, then the baffle opening of primary air fan corresponding for described coal pulverizer is updated to the baffle opening limiting value that described 7th acquisition module 410 obtains
If not, then the baffle opening of primary air fan corresponding for described coal pulverizer is updated to the baffle opening desired value that described 6th acquisition module 409 obtains;
Described startup module 401, also for terminating current control period, starts next control cycle.
Whether monitoring module 412, there is tripping operation or state of a control conversion for monitoring the coal pulverizer being in auto state, if so, then:
The the first setting air quantity being in the coal pulverizer of auto state after obtaining tripping operation or after state of a control conversion is newly worth NSP1 and the first actual air volume is newly worth NPV1;
The setting air quantity obtained between described SP1 and described NSP1 changes array { SP1
i, the actual air volume obtained between described PV1 and described NPV1 changes array { PV1
i; Described { SP1
iin element S P1
ifor the numerical value in NSP1 described headed by the described SP1 change sequence that is tail, described { PV1
iin element VP
ifor the numerical value in NPV1 described headed by the described PV1 change sequence that is tail; Wherein, i=1,2,3 ..., n, n are described { SP1
iand described { PV1
iin the number of element;
N-1 after current control period takes turns in control cycle, orders described second acquisition module to obtain described SP1 and equals SP1 successively
2, SP1
3, SP1
4..., SP1
n; Order described 3rd acquisition module to obtain described PV1 and equal PV1 successively
2, PV1
3, PV1
4..., PV1
n;
From n-th after current control period takes turns control cycle, order described second acquisition module to obtain described SP1 and equal the setting air quantity sum that all Boiler pressure control states are the coal pulverizer of auto state; Order described 3rd acquisition module to obtain described PV1 and equal the actual air volume sum that all Boiler pressure control states are the coal pulverizer of auto state.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a control method for primary air fan, is characterized in that, described method comprises:
Start current control period;
Obtain setting air quantity and actual air volume that Boiler pressure control state is the coal pulverizer of auto state;
Obtain the first setting value SP1, described SP1 equals the setting air quantity sum that all Boiler pressure control states are the coal pulverizer of auto state;
Obtain the first measured value PV1, described PV1 equals the actual air volume sum that all Boiler pressure control states are the coal pulverizer of auto state;
By carrying out to described SP1 and described PV1 the baffle opening adjusted value that the first PID PID arithmetic obtains primary air fan corresponding to described coal pulverizer;
Obtain the baffle opening currency of primary air fan corresponding to described coal pulverizer;
By carrying out to described baffle opening currency and described baffle opening adjusted value the baffle opening desired value that the second PID PID arithmetic obtains primary air fan corresponding to described coal pulverizer;
Obtain the baffle opening limiting value of primary air fan corresponding to described coal pulverizer;
Judge whether described baffle opening desired value is greater than described baffle opening limiting value, if so, then the baffle opening of primary air fan corresponding for described coal pulverizer be updated to described baffle opening limiting value,
If not, then the baffle opening of primary air fan corresponding for described coal pulverizer is updated to described baffle opening desired value;
Terminate current control period, start next control cycle.
2. method as claimed in claim 1, it is characterized in that, described method also comprises:
Whether the coal pulverizer that monitoring is in auto state there is tripping operation or state of a control conversion, if so, then:
The the first setting air quantity being in the coal pulverizer of auto state after obtaining tripping operation or after state of a control conversion is newly worth NSP1 and the first actual air volume is newly worth NPV1;
The setting air quantity obtained between described SP1 and described NSP1 changes array { SP1
i, the actual air volume obtained between described PV1 and described NPV1 changes array { PV1
i; Described { SP1
iin element S P1
ifor the numerical value in NSP1 described headed by the described SP1 change sequence that is tail, described { PV1
iin element PV1
ifor the numerical value in NPV1 described headed by the described PV1 change sequence that is tail; Wherein, i=1,2,3 ..., n, n are described { SP1
iand described { PV1
iin the number of element;
N-1 after current control period takes turns in control cycle, and described SP1 equals SP1 successively
2, SP1
3, SP1
4..., SP1
n; Described PV1 equals PV1 successively
2, PV1
3, PV1
4..., PV1
n;
From n-th after current control period takes turns control cycle, described SP1 equals the setting air quantity sum that all Boiler pressure control states are the coal pulverizer of auto state; Described PV1 equals the actual air volume sum that all Boiler pressure control states are the coal pulverizer of auto state.
3. the method for claim 1, is characterized in that, the baffle opening limiting value of the primary air fan that the described coal pulverizer of described acquisition is corresponding specifically comprises:
Obtain the discharge pressure of fan limiting value of primary air fan corresponding to described coal pulverizer;
Correlation function according to presetting obtains baffle opening limiting value corresponding to described discharge pressure of fan limiting value.
4. the method for claim 1, is characterized in that, after described acquisition measured value PV1, described obtain the baffle opening adjusted value of primary air fan corresponding to described coal pulverizer according to described SP1 and described PV1 before, also comprise:
Obtain air quantity correction factor;
Calculate the product of described PV1 and described air quantity correction factor, and the value of described PV1 is updated to this product.
5. method as claimed in claim 4, it is characterized in that, described acquisition air quantity correction factor specifically comprises:
Obtain the hot air disperser instruction or the hot air disperser open degree feedback that are in the coal pulverizer of running status, described hot air disperser instruction or hot air disperser open degree feedback comprise the hot air disperser aperture of described coal pulverizer;
Obtain the second measured value PV2, described in described PV2 equals, be in the hot air disperser aperture maximum in hot air disperser aperture corresponding to the coal pulverizer of running status;
Obtain the second setting value SP2, described SP2 is hot air disperser aperture control objectives value, changes experience preset by operating personnel according to the hot air disperser aperture of each operation coal pulverizer;
Air quantity correction initial coefficients is obtained by carrying out the 3rd PID PID arithmetic to described SP2 and described PV2;
Described air quantity correction initial coefficients is converted into described air quantity correction factor by the transfer function according to presetting.
6. a control device for primary air fan, is characterized in that, described device comprises:
Start module, for starting current control period;
First acquisition module, for obtaining the setting air quantity and actual air volume that Boiler pressure control state is the coal pulverizer of auto state;
Second acquisition module, for obtaining the first setting value SP1, described SP1 equals the setting air quantity sum that all Boiler pressure control states are the coal pulverizer of auto state;
3rd acquisition module, for obtaining the first measured value PV1, described PV1 equals the actual air volume sum that all Boiler pressure control states are the coal pulverizer of auto state;
4th acquisition module, adjusts aperture adjusted value for the baffle opening obtaining primary air fan corresponding to described coal pulverizer by carrying out the first PID PID arithmetic to described second the acquisition module SP1 obtained and the PV1 that described 3rd acquisition module obtains;
5th acquisition module, for obtaining the baffle opening currency of primary air fan corresponding to described coal pulverizer;
6th acquisition module, the baffle opening adjusted value obtained for the baffle opening currency by obtaining described 5th acquisition module and described 4th acquisition module carries out the baffle opening desired value that the second PID PID arithmetic obtains primary air fan corresponding to described coal pulverizer;
7th acquisition module, for obtaining the baffle opening limiting value of primary air fan corresponding to described coal pulverizer;
Judge module, for judging whether the baffle opening desired value of described 6th acquisition module acquisition is greater than the baffle opening limiting value of described 7th acquisition module acquisition, if, then the baffle opening of primary air fan corresponding for described coal pulverizer is updated to the baffle opening limiting value that described 7th acquisition module obtains
If not, then the baffle opening of primary air fan corresponding for described coal pulverizer is updated to the baffle opening desired value that described 6th acquisition module obtains;
Described startup module, also for terminating current control period, starts next control cycle.
7. device as claimed in claim 6, it is characterized in that, described device also comprises:
Whether monitoring module, there is tripping operation or state of a control conversion for monitoring the coal pulverizer being in auto state, if so, then:
The the first setting air quantity being in the coal pulverizer of auto state after obtaining tripping operation or after state of a control conversion is newly worth NSP1 and the first actual air volume is newly worth NPV1;
The setting air quantity obtained between described SP1 and described NSP1 changes array { SP1
i, the actual air volume obtained between described PV1 and described NPV1 changes array { PV1
i; Described { SP1
iin element S P1
ifor the numerical value in NSP1 described headed by the described SP1 change sequence that is tail, described { PV1
iin element PV1
ifor the numerical value in NPV1 described headed by the described PV1 change sequence that is tail; Wherein, i=1,2,3 ..., n, n are described { SP1
iand described { PV1
iin the number of element;
N-1 after current control period takes turns in control cycle, orders described second acquisition module to obtain described SP1 and equals SP1 successively
2, SP1
3, SP1
4..., SP1
n; Order described 3rd acquisition module to obtain described PV1 and equal PV1 successively
2, PV1
3, PV1
4..., PV1
n;
From n-th after current control period takes turns control cycle, order described second acquisition module to obtain described SP1 and equal the setting air quantity sum that all Boiler pressure control states are the coal pulverizer of auto state; Order described 3rd acquisition module to obtain described PV1 and equal the actual air volume sum that all Boiler pressure control states are the coal pulverizer of auto state.
8. device as claimed in claim 6, is characterized in that, described 7th acquisition module specifically for:
Obtain the discharge pressure of fan limiting value of primary air fan corresponding to described coal pulverizer;
Correlation function according to presetting obtains baffle opening limiting value corresponding to described discharge pressure of fan limiting value.
9. device as claimed in claim 6, it is characterized in that, described device also comprises:
8th acquisition module, for obtaining air quantity correction factor;
More new module, the product of the air quantity correction factor that PV1 and described 8th acquisition module for calculating described 3rd acquisition module acquisition obtain, and the value of described PV1 is updated to this product.
10. device as claimed in claim 9, it is characterized in that, described 8th acquisition module specifically comprises:
First obtains submodule, and for obtaining hot air disperser instruction or the hot air disperser open degree feedback of the coal pulverizer being in running status, described hot air disperser instruction or hot air disperser open degree feedback comprise the hot air disperser aperture of described coal pulverizer;
Second obtains submodule, for obtaining the second measured value PV2, is in the hot air disperser aperture maximum in hot air disperser aperture corresponding to the coal pulverizer of running status described in described PV2 equals;
3rd obtains submodule, and for obtaining the second setting value SP2, described SP2 is hot air disperser aperture control objectives value, changes experience preset by operating personnel according to the hot air disperser aperture of each operation coal pulverizer;
4th obtains submodule, and the PV2 for obtaining by obtaining submodule to the SP2 and described second of described 3rd acquisition submodule acquisition carries out the 3rd PID PID arithmetic and obtains air quantity correction initial coefficients;
5th transform subblock, for being converted into described air quantity correction factor according to the transfer function preset by the air quantity correction initial coefficients that described 4th acquisition submodule obtains.
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| CN107238102B (en) * | 2017-05-31 | 2019-01-29 | 上海明华电力技术工程有限公司 | A kind of primary air fan RB control method under full load mode |
| CN109894251B (en) * | 2019-03-28 | 2020-06-02 | 广东电科院能源技术有限责任公司 | Control method, device and equipment for primary air of coal-fired unit |
| CN110701634A (en) * | 2019-09-18 | 2020-01-17 | 上海发电设备成套设计研究院有限责任公司 | Primary air pressure control system and control method thereof |
| CN112128602B (en) * | 2020-09-25 | 2021-09-14 | 江苏方天电力技术有限公司 | Lubricating oil temperature control method for large phase modifier capable of inhibiting intermittent internal disturbance |
| CN112503019B (en) * | 2020-11-30 | 2022-08-19 | 华能国际电力股份有限公司营口电厂 | Desulfurization oxidation fan control system |
| CN113108307B (en) * | 2021-04-13 | 2022-09-23 | 西安热工研究院有限公司 | Primary air control system and control method for reducing hot air throttling loss of coal mill |
| 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 |
| CN115193571B (en) * | 2022-07-08 | 2024-02-02 | 国家能源集团谏壁发电厂 | Wind pressure control method, device, storage medium and equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798140A (en) * | 2012-06-26 | 2012-11-28 | 云南电力试验研究院（集团）有限公司电力研究院 | Primary air flow simulation control method for coal mills of coal-fired unit |
| CN103047670A (en) * | 2013-01-29 | 2013-04-17 | 福州福大自动化科技有限公司 | Direct blowing type double-inlet and double-outlet steel ball grinding energy conservation optimization system and method thereof |
| CN103234219A (en) * | 2013-04-24 | 2013-08-07 | 广东电网公司电力科学研究院 | Circumference air quantity adjustment method and system for pulverized coal boiler after fire coal kind changing |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0796923B2 (en) * | 1988-04-22 | 1995-10-18 | 三菱重工業株式会社 | Control method of primary ventilation system in coal-fired boiler |
| JPH07101090B2 (en) * | 1989-06-19 | 1995-11-01 | 北海道電力株式会社 | Mill control method |
-
2013
- 2013-12-26 CN CN201310739782.6A patent/CN103712235B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798140A (en) * | 2012-06-26 | 2012-11-28 | 云南电力试验研究院（集团）有限公司电力研究院 | Primary air flow simulation control method for coal mills of coal-fired unit |
| CN103047670A (en) * | 2013-01-29 | 2013-04-17 | 福州福大自动化科技有限公司 | Direct blowing type double-inlet and double-outlet steel ball grinding energy conservation optimization system and method thereof |
| CN103234219A (en) * | 2013-04-24 | 2013-08-07 | 广东电网公司电力科学研究院 | Circumference air quantity adjustment method and system for pulverized coal boiler after fire coal kind changing |
Non-Patent Citations (2)
| Title |
|---|
| 磨煤机一次风量测量系统改造;谭杰;《华电技术》;20080229;第30卷(第2期);第62-63页，第66页 * |
| 磨煤机风量调节优化控制措施;李伟;《制冷空调与电力机械》;20101115;第31卷(第136期);第87-88页，第92页 * |
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Address after: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Co-patentee after: Shajiao C Power Station of Guangdong Yudean Group Co., Ltd. Patentee after: ELECTRIC POWER RESEARCH INSTITUTE, GUANGDONG POWER GRID CO., LTD. Address before: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Co-patentee before: Shajiao C Power Station of Guangdong Yudean Group Co., Ltd. Patentee before: Electrical Power Research Institute of Guangdong Power Grid Corporation |