CN106762769B - The primary air pressure desired value decision-making technique and system contributed based on mill group - Google Patents
The primary air pressure desired value decision-making technique and system contributed based on mill group Download PDFInfo
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- CN106762769B CN106762769B CN201710014067.4A CN201710014067A CN106762769B CN 106762769 B CN106762769 B CN 106762769B CN 201710014067 A CN201710014067 A CN 201710014067A CN 106762769 B CN106762769 B CN 106762769B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
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Abstract
The present invention relates to a kind of primary air pressure desired value decision-making techniques and system contributed based on mill group, and put into operation mill group counting module, the current mill group quantity that puts into operation of statistics；Desired value decision making detection system, judge that the current each mill group that puts into operation is contributed whether in average value allowable range, decision system target output value is set as mill group output average value, in conjunction with the output of bias compensation logic module, is contributed through control system output module control primary air fan；When desired value decision making detection system judges that the current mill group output that puts into operation has in any deviation average allowable range, to carrying out the operation that takes large values for the first time just for positive value deviation value, reject the maximum value, taken large values operation for the second time again, record the numerical value, the number average value is cumulative as decision system target output value, in conjunction with the output of bias compensation logic module, control output order is ultimately formed through polygronal function, is contributed through control system output module control primary air fan.
Description
Technical field
The invention belongs to field of thermal power more particularly to a kind of primary air pressure desired value decision-making parties contributed based on mill group
Method and system.
Background technology
Thermal power plant's primary air pressure desired value scale value typical logic has：(1) mean value or maximum value is taken to make using total coal-supplying amount
Set target value is controlled for primary air pressure；(2) polygronal function F (x) superpositions bias compensation mode is used to form primary air pressure target
Value.Both methods cannot be satisfied the control of primary air pressure desired value online adaptive, cause to primary air fan control effect not
Good, when unit load needs maximum magnitude to adjust, the setting of desired value will have a direct impact on wind turbine and contribute, and inappropriate desired value
System varying duty response speed may be caused to lag, or fan energy consumption is made to increase, increase cost of electricity-generating.
In view of the above shortcomings, the designer is actively subject to research and innovation, a kind of contributed based on mill group to found
Primary air pressure desired value decision-making technique and system make it with more the utility value in industry.
Invention content
In order to solve the above technical problems, the object of the present invention is to provide one kind capable of improving the unit speed of response, one is reduced
The primary air pressure desired value decision-making technique and system of secondary fan energy consumption contributed based on mill group.
The present invention is based on the primary air pressure desired value decision-making techniques that mill group is contributed, including：
The current mill group quantity that puts into operation of statistics, calculates the average value for the mill group output that currently puts into operation, and will be greater than being equal to the average value
Subtract the current mill group that puts into operation always to power 1% and always make to the 1% of power plus the mill group that currently puts into operation less than or equal to the average value
To put into operation, whether mill group contributes in average value allowable range；
Judge that each mill group that puts into operation is contributed whether in average value allowable range,
If each of the mill group that currently puts into operation is contributed in average value ranges, partially plus scheduled first by the average value
Offset is set as output, according to output formation control output order, control primary air fan is contributed to reach and be adjusted once
The purpose of wind pressure；
If at least one in the mill group that currently puts into operation is contributed not in average value ranges, obtain one in currently putting into operation mill group
Second largest power generating value of platform power generating value and average value are cumulative as output valve, which adds scheduled second bias compensation value
It is exported to polygronal function operation as control variable data, using operation result as output, control output is formed according to the output
Instruction, control primary air fan contribute to achieve the purpose that adjust primary air pressure.
Further, the polygronal function operational formula is：F (x)=ax2+ bx+c, wherein a, b, c are function parameter.
Further, the first bias compensation value, the second bias compensation value are artificial empirically determined data.
Further, it when wind turbine load changes, by the correspondence of load and coal-supplying amount, determines practical to coal
Amount introduces in the feedforward amount of the load differential action in addition, so that coal-supplying amount is responded load variations, and then carry out judgement operation, provide
Primary air pressure setting value under the operating mode.
The present invention is based on the primary air pressure desired value decision systems that mill group is contributed, including：The mill group that puts into operation counting module, target
It is worth decision making detection system, bias compensation logic module, control system output module；
The mill group counting module that puts into operation calculates the mill group output that currently puts into operation for counting the current mill group quantity that puts into operation
Average value, will be greater than being equal to the average value subtract the current mill group that puts into operation always to power 1% and added less than or equal to the average value
Whether the current mill group that puts into operation always is used as the mill group that puts into operation to contribute in average value allowable range to the 1% of power；
Desired value decision making detection system, for judging that whether each mill group that puts into operation contributes in average value permission model
In enclosing,
If each of the mill group that currently puts into operation is contributed in average value ranges, decision system target output value is set as grinding
Group output average value ultimately forms control output order in conjunction with the output of bias compensation logic module (3), defeated through control system
Go out module (4) control primary air fan to contribute to achieve the purpose that adjust primary air pressure；
If at least one in the mill group that currently puts into operation is contributed not in average value ranges, each output of the mill group that currently puts into operation
Value carries out the operation that takes large values for the first time, rejects the maximum value, and taken large values operation for the second time again, and record takes big for the second time
Value, the big value taken for the second time and average value is cumulative as decision system target output value, in conjunction with bias compensation logic module
Output, control output order is ultimately formed through polygronal function, is contributed through control system output module control primary air fan to reach
To the purpose for adjusting primary air pressure.
Further, it when wind turbine load instruction changes, by the correspondence of load and coal-supplying amount, determines practical
Coal-supplying amount makes coal-supplying amount quick response load variations, and then have this desired value to determine by introducing the feedforward amount of the load differential action
Plan system carries out judgement operation, provides the primary air pressure setting value under the operating mode.
Further, the polygronal function operational formula is：F (x)=ax2+ bx+c, wherein a, b, c are function parameter.
Further, the output of bias compensation logic module is artificial empirically determined data.
According to the above aspect of the present invention, the present invention has at least the following advantages：
The present invention, in the actual production process, when being adjusted without flame kernel, mill group output more mean time is adopted
Current primary air pressure target given value is obtained with total coal-supplying amount average value by conversion function and after being superimposed bias compensation value；When negative
When lotus adjusts, when mill group output deviation is larger, select the second largest power generating value after converting function superposition bias compensation as primary
Wind pressure target given value.The primary air pressure under different operational modes is screened using judgment mode, is improving primary air fan
Under the premise of desired value in load adjustment gives accuracy, while ensureing fan energy consumption.
The above description is merely an outline of the technical solution of the present invention, in order to better understand the technology hand of the present invention
Section, and can be implemented in accordance with the contents of the specification, and with presently preferred embodiments of the present invention and attached drawing be coordinated to be described in detail such as below
Afterwards.
Description of the drawings
Fig. 1 is the block diagram for the primary air pressure desired value decision system contributed the present invention is based on mill group；
1 is the mill group counting module that puts into operation；2 be desired value decision making detection system；3 be bias compensation logic mould
Block；4 be control system output module.
Specific implementation mode
With reference to the accompanying drawings and examples, the specific implementation mode of the present invention is described in further detail.Implement below
Example is not limited to the scope of the present invention for illustrating the present invention.
Embodiment 1
The primary air pressure desired value decision-making technique that the present embodiment is contributed based on mill group, including：
The current mill group quantity that puts into operation of statistics, calculates the average value for the mill group output that currently puts into operation, and will be greater than being equal to the average value
Subtract the current mill group that puts into operation always to power 1% and always make to the 1% of power plus the mill group that currently puts into operation less than or equal to the average value
To put into operation, whether mill group contributes in average value allowable range；
Judge that each mill group that puts into operation is contributed whether in average value allowable range,
If each of the mill group that currently puts into operation is contributed in average value ranges, partially plus scheduled first by the average value
Offset is set as output, according to output formation control output order, control primary air fan is contributed to reach and be adjusted once
The purpose of wind pressure；The first bias compensation value is artificial empirically determined data.
If at least one in the mill group that currently puts into operation is contributed not in average value ranges, obtain one in currently putting into operation mill group
Second largest power generating value of platform power generating value and average value are cumulative as output valve, which adds scheduled second bias compensation value
It is exported to polygronal function operation as control variable data, using operation result as output, control output is formed according to the output
Instruction, control primary air fan contribute to achieve the purpose that adjust primary air pressure.The second bias compensation value is artificial root
According to empirically determined data.
The polygronal function operational formula is：F (x)=ax2+ bx+c, wherein a, b, c are function parameter.
Further, it when wind turbine load changes, by the correspondence of load and coal-supplying amount, determines practical to coal
Amount makes coal-supplying amount respond load variations, and then carry out judgement operation, provides this by introducing the feedforward amount of the load differential action
Primary air pressure setting value under operating mode.
Embodiment 2
Referring to Fig. 1, a kind of primary air pressure desired value decision system contributed based on mill group of the present embodiment, including：Put into operation mill
Group counting module, desired value decision making detection system, bias compensation logic module, control system output module；
The mill group counting module that puts into operation calculates the mill group output that currently puts into operation for counting the current mill group quantity that puts into operation
Average value, will be greater than being equal to the average value subtract the current mill group that puts into operation always to power 1% and added less than or equal to the average value
Whether the current mill group that puts into operation always is used as the mill group that puts into operation to contribute in average value allowable range to the 1% of power；
Desired value decision making detection system, for judging that whether each mill group that puts into operation contributes in average value permission model
In enclosing,
If each of the mill group that currently puts into operation is contributed in average value ranges, decision system target output value is set as grinding
Group output average value ultimately forms control output order in conjunction with the output of bias compensation logic module (3), defeated through control system
Go out module (4) control primary air fan to contribute to achieve the purpose that adjust primary air pressure；
If at least one in the mill group that currently puts into operation is contributed not in average value ranges, each output of the mill group that currently puts into operation
Value carries out the operation that takes large values for the first time, rejects the maximum value, and taken large values operation for the second time again, and record takes big for the second time
Value, the big value taken for the second time and average value is cumulative as decision system target output value, in conjunction with bias compensation logic module
Output, control output order is ultimately formed through polygronal function, is contributed through control system output module control primary air fan to reach
To the purpose for adjusting primary air pressure.The polygronal function operational formula is：F (x)=ax2+ bx+c, wherein a, b, c are function
Parameter.
Among the above, the output of bias compensation logic module is artificial empirically determined data.
Further, it when unit load instruction changes, by the correspondence of load and coal-supplying amount, determines practical
Coal-supplying amount introduces in the feedforward amount of the load differential action in addition, makes coal-supplying amount quick response load variations, and then determined by desired value
Plan system carries out judgement operation, provides the primary air pressure setting value under the operating mode, and one in the case where meeting quick response load variations
Secondary wind turbine is contributed, while taking into account primary air fan energy consumption.
Referring to Fig. 1, working principle of the present invention is as follows：
The mill group that puts into operation counting module 1 counts the current mill group quantity that puts into operation, and result is transferred to desired value decision making system
Logic module 2, judge that the current each mill group that puts into operation is contributed when desired value decision making detection system 2 allows in average value
In range (average value ± calculated with the 1% of total coal-supplying amount), decision system target output value is set as mill group output average value,
In conjunction with the output of bias compensation logic module 3, control output order is ultimately formed, is controlled once through control system output module 4
Wind turbine contributes to achieve the purpose that adjust primary air pressure；
When the mill group output that judges currently to put into operation of desired value decision making detection system 2 has any deviation average to permit
Perhaps range (being calculated with the 1% of total coal-supplying amount) carries out the operation (just for positive value) that takes large values for the first time to deviation value, rejects this most
Big value, taken large values operation for the second time again, records the numerical value, and the numerical value (the i.e. second largest coal-supplying amount) and average value is cumulative
As decision system target output value, in conjunction with the output of bias compensation logic module 3, through polygronal function f (x)=ax2+ bx+c is most
End form controls primary air fan at control output order, through control system output module 4 and contributes to reach adjusting primary air pressure
Purpose.
The above is only a preferred embodiment of the present invention, it is not intended to restrict the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is several improvement and
Modification, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of primary air pressure desired value decision-making technique contributed based on mill group, which is characterized in that including：
The current mill group quantity that puts into operation of statistics, calculates the average value for the mill group output that currently puts into operation, will be greater than subtracting equal to the average value
The current mill group that puts into operation always to power 1% and less than or equal to the average value plus the mill group that currently puts into operation always to power 1% as throwing
Mill group is transported whether to contribute in average value allowable range；
Judge that each mill group that puts into operation is contributed whether in average value allowable range,
If each of the mill group that currently puts into operation is contributed in average value ranges, which is mended plus scheduled first biasing
Value is repaid as output, control output order is formed according to the output, control primary air fan is contributed to reach adjusting primary air pressure
Purpose；
If at least one in the mill group that currently puts into operation is contributed not in average value ranges, one goes out in the current mill group that puts into operation of acquisition
Second largest power generating value of force value and average value are cumulative as output valve, which adds scheduled second bias compensation value conduct
Control variable data is exported to polygronal function operation, and using operation result as output, control output order is formed according to the output,
Control primary air fan contributes to achieve the purpose that adjust primary air pressure.
2. the primary air pressure desired value decision-making technique according to claim 1 contributed based on mill group, which is characterized in that described
Polygronal function operational formula be：F (x)=ax2+ bx+c, wherein a, b, c are function parameter.
3. the primary air pressure desired value decision-making technique according to claim 1 contributed based on mill group, which is characterized in that described
The first bias compensation value, the second bias compensation value be artificial empirically determined data.
4. the primary air pressure desired value decision-making technique according to claim 1 contributed based on mill group, which is characterized in that work as wind
When machine load changes, by the correspondence of load and coal-supplying amount, practical coal-supplying amount is determined, in the load differential action in addition
Feedforward amount introduce, so that coal-supplying amount is responded load variations, and then carry out judgement operation, provide the primary air pressure setting under the operating mode
Value.
5. a kind of primary air pressure desired value decision system contributed based on mill group, which is characterized in that including：Put into operation mill group count module
Block, desired value decision making detection system, bias compensation logic module, control system output module；
The mill group counting module that puts into operation calculates being averaged for the mill group output that currently puts into operation for counting the current mill group quantity that puts into operation
Value, will be greater than being equal to the average value subtract the current mill group that puts into operation always to power 1% and less than or equal to the average value plus current
Whether the mill group that puts into operation always is used as the mill group that puts into operation to contribute in average value allowable range to the 1% of power；
Desired value decision making detection system, for judging that whether each mill group that puts into operation contributes in average value allowable range
It is interior,
If each of the mill group that currently puts into operation is contributed in average value ranges, decision system target output value is set as mill group and is gone out
Power average value ultimately forms control output order in conjunction with the output of bias compensation logic module (3), and mould is exported through control system
Block (4) control primary air fan contributes to achieve the purpose that adjust primary air pressure；
If at least one in the mill group that currently puts into operation contributes not in average value ranges, each power generating value of the mill group that currently puts into operation into
The capable operation that takes large values for the first time, rejects the maximum value, and taken large values operation for the second time again, records the big value taken for the second time,
The big value taken for the second time and average value is cumulative as decision system target output value, in conjunction with the defeated of bias compensation logic module
Go out, control output order is ultimately formed through polygronal function, is contributed through control system output module control primary air fan to reach
Adjust the purpose of primary air pressure.
6. the primary air pressure desired value decision system according to claim 5 contributed based on mill group, which is characterized in that work as wind
When machine load instruction changes, by the correspondence of load and coal-supplying amount, practical coal-supplying amount is determined, it is micro- by introducing load
The feedforward amount being allocated as makes coal-supplying amount quick response load variations, and then has this desired value decision system to carry out judgement operation, gives
Go out the primary air pressure setting value under the operating mode.
7. the primary air pressure desired value decision system according to claim 5 contributed based on mill group, which is characterized in that described
Polygronal function operational formula be：F (x)=ax2+ bx+c, wherein a, b, c are function parameter.
8. the primary air pressure desired value decision system according to claim 5 contributed based on mill group, which is characterized in that biasing
The output of compensation logic module is artificial empirically determined data.
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4205631A (en) * | 1978-10-11 | 1980-06-03 | Westinghouse Electric Corp. | Pressure limiting control for an inlet draft fan in an electric power plant |
| JPS6298571A (en) * | 1985-10-24 | 1987-05-08 | Mitsubishi Electric Corp | Controlling method for fuel cell power generating system |
| CN102235893B (en) * | 2010-04-29 | 2012-10-24 | 华北电力科学研究院有限责任公司 | Air quantity measuring method and device |
| CN102222936B (en) * | 2011-06-20 | 2013-06-26 | 浙江省电力公司电力科学研究院 | Start-stop control method and system for grinder set of grid-connected generator |
| CN103104931B (en) * | 2011-11-09 | 2015-11-04 | 华北电力科学研究院有限责任公司 | A kind of primary frequency modulation method based on boiler primary air pressure dynamic compensation and system |
| CN103836639B (en) * | 2013-12-31 | 2016-02-24 | 广东电网公司电力科学研究院 | A kind of primary air fan control method based on First air burner hearth differential pressure and device |
| CN104646167B (en) * | 2015-01-20 | 2016-03-02 | 浙江大学 | A kind of primary air pressure self-adaptation control method |
| CN104848250B (en) * | 2015-04-17 | 2017-03-15 | 西安热工研究院有限公司 | A kind of primary air pressure desired value intelligence control system and method |
| CN105159243B (en) * | 2015-07-28 | 2017-10-24 | 华北电力大学（保定） | A kind of coal grindability compensating control method of fired power generating unit coordinated control system |
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Address after: No. 3195, Jilin high tech Zone Wei Shan Road, Changchun, Jilin Patentee after: Datang northeast electric power test and Research Institute Co., Ltd. Address before: No. 3195, Jilin high tech Zone Wei Shan Road, Changchun, Jilin Patentee before: DATANG NORTHEAST ELECTRIC POWER TEST RESEARCH INSTITUTE CO., LTD. |