CN107908103A - One kind is based on the modified coordinated control system calorific value bearing calibration of turbine efficiency - Google Patents
One kind is based on the modified coordinated control system calorific value bearing calibration of turbine efficiency Download PDFInfo
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- CN107908103A CN107908103A CN201710951869.8A CN201710951869A CN107908103A CN 107908103 A CN107908103 A CN 107908103A CN 201710951869 A CN201710951869 A CN 201710951869A CN 107908103 A CN107908103 A CN 107908103A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
- G05B13/0265—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric the criterion being a learning criterion
- G05B13/029—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric the criterion being a learning criterion using neural networks and expert systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
- G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P.I., P.I.D.
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
- G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
- G05B13/042—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators in which a parameter or coefficient is automatically adjusted to optimise the performance
Abstract
The present invention relates to one kind to be based on the modified coordinated control system calorific value bearing calibration of turbine efficiency, changes for turbine efficiency, boiler master in coordinated control system is modified.It includes the following steps：A, boiler side calorific value corrective loop is corrected；B, steamer pusher side Efficiency correction；C, the exhaust enthalpy based on broad sense radial base neural net calculates；D, calorific value exports boiler master and corrects.The present invention separates turbine efficiency from boiler calorific value correcting value, by boiler and steam turbine efficiency separate computations, the setting value of calorific value corrective loop is revised as to the thermic load function of unit reality by function of load at the same time, it can ensure that the output of calorific value corrective loop is the true calorific value of fuel, effectively reduce the system fluctuation caused by steam turbine efficiency change, overshoot is reduced, improves the safety and stability of unit.
Description
Technical field
The present invention relates to one kind to be based on the modified coordinated control system calorific value bearing calibration of turbine efficiency.
Background technology
The task of coordinated control system be make fired power generating unit load quick response external load demand (it is middle tune load instruction or
Operator's load instruction), and at the same time before holding machine vapour pressure stabilization.Calorific value corrective loop is the important composition portion for coordinating control
Point, its function be when unit coal-burning caloric value with mark coal there is deviation when, fuel value is modified, ensure coordinate control is
The stability of system.The fuel quantity that traditional calorific value corrective loop is consumed using unit is compared with electric load, by unit efficiency
Overall consideration is carried out, when deviation occur in fuel used amount and design load, it is believed that be that fuel value changes, calorific value corrects back to
Road is modified fuel quantity, sees Fig. 1.But with the continuous development of thermoelectricity power-saving technology, when steam turbine because operating point occurs
The shortcomings that change is when causing efficiency change, the program is also constantly highlighting.If air cooling unit back pressure is with load and environment temperature change
When changing and changing, turbine efficiency, which changes, causes whole unit efficiency to change, and calorific value corrective loop can be because of economy not
It is disconnected to correct fuel value, cause calorific value and the natural fuel calorific value mismatch corrected in coordinated control system, cause unit varying duty
During parametric oscillation；The power-saving technologies such as steam turbine Tong Liao area, unit flexibility transformation, optimization of sliding pressure can also change steam turbine
Efficiency, causes the mistake adjusting of calorific value corrective loop, causes unit major parameter to fluctuate, influence the safe and stable operation of unit.
The content of the invention
The object of the present invention is to provide one kind to be suitable for because of the original such as water-saving (air cooling unit), flexibility transformation, reducing energy consumption
During because causing turbine efficiency to change, the coordinated control system calorific value bearing calibration of fired power generating unit.
The present invention adopts the following technical scheme that：
One kind is based on the modified coordinated control system calorific value bearing calibration of turbine efficiency, changes for turbine efficiency,
Boiler master in coordinated control system is modified.
It includes the following steps：
A, boiler side calorific value corrective loop is corrected；
B, steamer pusher side Efficiency correction；
C, the exhaust enthalpy based on broad sense radial base neural net calculates；
D, calorific value exports boiler master and corrects.
The step A includes the following steps：
(1) mark coal amount of the setting value of PID regulator needed for the current thermic load of boiler；The setting of the PID tune machine
Value is calculated by formula (a)；
Brs=f (D × (h1-h3)+D1×(ha-hb)) formula (a)
In formula (a), Brs：The setting value of PID regulator；
D：Main steam flow, is obtained by formula (b), is converted by first stage pressure；
h1：Boiler export main steam enthalpy, is tabled look-up acquisition by the setting value of current unit main steam temperature, pressure；
h3：Boiler inlet feeds water enthalpy, is tabled look-up acquisition by economizer entrance feed pressure, temperature,
D1：Reheated steam flow, is obtained by formula (b)；
hb：High outlet steam enthalpy, is tabled look-up acquisition by the high outlet vapor (steam) temperature of current unit, the setting value of pressure；
ha：Intermediate pressure cylinder inlet steam enthalpy, intermediate pressure cylinder inlet steam pressure, temperature are tabled look-up acquisition, D × (h1-h3) may be characterized as
Current boiler caloric value containing boiler efficiency；
f(·)：Function is converted, is design mark coal amount by boiler heat load conversion；
In formula (b), D10、pr、tr0、pr0、trRespectively reheated steam flow design value, pressure design value, temperature design
Value, actual reheated steam pressure, temperature；
(2) regulated variable of PID is identical with traditional calorific value corrective loop in calorific value corrective loop, is chosen for unit fuel quantity.
The step B is the adjusted coefficient K by turbine thermodynamic efficiency to calorific value2, boiler calorific value corrective loop is carried out
Correction, K2Calculated by formula (c)；
In formula (c), K2：Turbine thermodynamic efficiency is to calorific value correction factor；η0t：The Design of Steam Turbine thermal efficiency；η1t：Steam turbine
The current thermal efficiency.
When steam turbine without steam extraction without resuperheat system when, according to formula (e) calculate the current thermal efficiency of steam turbine；
In formula (e), h1：Turbine inlet enthalpy, is tabled look-up acquisition by turbine inlet vapor (steam) temperature, pressure set points；
h2：For turbine discharge enthalpy, carried out by unit current loads, main steam enthalpy, reheated steam enthalpy, exhaust steam pressure, exhaust temperature
Mathematic interpolation obtains；h3：Boiler inlet feeds water enthalpy, is tabled look-up acquisition by feed pressure, temperature.
When steam turbine is without steam extraction once reheating, the current thermal efficiency of steam turbine is calculated according to formula (f)；
In formula (f), ha：Reheated steam enthalpy, is tabled look-up acquisition by reheat steam temperature setting value, pressure；hb：High pressure cylinder is arranged
Vapour enthalpy, is tabled look-up acquisition by exhaust temperature of HP, pressure.
When steam turbine has steam extraction without resuperheat, the current thermal efficiency of steam turbine is calculated according to formula (g)；
In formula (g), a：Steam extraction share；i：Steam extraction series；n：Steam extraction is numbered；x：Steam extraction acting deficiency coefficient, x=(hi-
hb)/(h1-hb), hiFor steam extraction enthalpy；It is steam extraction loss share, is obtained by steam extraction amounts at different levels, the computing of steam extraction parameter.
When steam turbine has steam extraction and resuperheat, the current thermal efficiency of steam turbine is calculated according to formula (h)；
In formula (h), a：High pressure cylinder steam extraction share；i：High pressure cylinder steam extraction series；n：High pressure cylinder steam extraction is numbered；x：Steam extraction is done
Work(deficiency coefficient, x=(hi-hb)/(h1-hb), hiFor steam extraction enthalpy；b：Mesolow cylinder steam extraction share；j：Mesolow cylinder steam extraction series；
m：The steam extraction of mesolow cylinder is numbered；y：Steam extraction acting deficiency coefficient, y=(hj-h2)/(ha-h2), hjFor steam extraction enthalpy；It is steam extraction loss share, is obtained by steam extraction amounts at different levels, the computing of steam extraction parameter.
The step C：Command fuel amount Bs is to be exported through the revised boiler master of calorific value, and calculation formula (i) is：
Bs=Bout×K1×K2Formula (i)
In formula (i), BoutExported for boiler master；K1Output for PID is calorific value correction coefficient, by carbonated drink in boiler
Caloric receptivity is calculated；K2：Turbine thermodynamic efficiency is to calorific value correction factor.
The step D is：
System input parameter is chosen for：The power of the assembling unit, main steam enthalpy, reheated steam enthalpy, exhaust steam pressure, each steam extraction enthalpy, are used
Matrix X is represented；
System output is exhaust enthalpy, is represented with matrix Y；
Radial basis function uses Gaussian function
System output is represented by formula (j)：
In formula (j)：
dmaxMaximum Euclidean distance between center of a sample, I are center of a sample's number.
Wherein, center of a sample determines by the following method：
1) hidden node number I is determined according to unit load and exhaust steam pressure；
2) I different typical samples are randomly selected in input sample as cluster centre (ti(n) (i=(1,
2 ..., I), n is iterations), if n=0, effective expertise can reduce iterative calculation amount；
3) all 2- norms of the input sample away from each center are calculated, | | Xk-ti(n) | |, k=(1,2 ..., be m) sample
Number, and to each input sample XkSorted out by minimum euclidean distance；
4) center of a sample is recalculated
5) terminate when error is less than setting value, otherwise return to step 3).
The beneficial effects of the present invention are：The present invention separates turbine efficiency from boiler calorific value correcting value, by boiler
With steam turbine efficiency separate computations, while the setting value of calorific value corrective loop is revised as to the thermic load of unit reality by function of load
Function, it is ensured that the output of calorific value corrective loop is the true calorific value of fuel, effectively reduces the system ripple caused by steam turbine efficiency change
It is dynamic, overshoot is reduced, improves the safety and stability of unit.
Brief description of the drawings
Fig. 1 classics calorific values corrective loop.
The calorific value corrective loop of Fig. 2 present invention.
Fig. 3, Fig. 4 are the design sketch (the overcritical air cooling units of 600MW) of embodiment.
Embodiment
In order to deepen the understanding of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings, which is
Exemplary, it is only used for explaining the present invention, protection domain is not formed and is limited.
It is introduced with reference to the overcritical air cooling unit embodiments of certain 600MW, unit is used uniformly international base unit.
Change for turbine efficiency, boiler master in coordinated control system is modified, ensure boiler master output
Correctness and calorific value corrective loop accuracy.
The step of the present invention is as follows：
1. boiler side calorific value corrective loop
For turbine efficiency and calorific value circuit are decoupled, the control strategy of pot value corrective loop is subjected to side in Fig. 2
Modification shown in frame 1.
(1) mark coal amount of the setting value of PID regulator needed for the current thermic load of boiler, i.e.,：
Brs=f (D × (h1-h3)+D1×(ha-hb))
In formula, Brs：Calorific value PID setting values；
D：Main steam flow, can by Fu Liugeer formula (i.e. formula b) obtain, converted by first stage pressure；
h1：Boiler export main steam enthalpy, is tabled look-up acquisition by the setting value of current unit main steam temperature, pressure；
h3：Boiler inlet feeds water enthalpy, is tabled look-up acquisition by economizer entrance feed pressure, temperature, D × (h1-h3) may be characterized as
Current boiler caloric value containing boiler efficiency；
D1：Reheated steam flow, is obtained by Fu Liugeer formula,
D10、pr、tr0、pr0、trRespectively reheated steam flow design value, pressure design value, temperature design value, actual reheating
Steam pressure, temperature.
hb：High outlet steam enthalpy, is tabled look-up acquisition by the high outlet vapor (steam) temperature of current unit, the setting value of pressure；
ha：Intermediate pressure cylinder inlet steam enthalpy, intermediate pressure cylinder inlet steam pressure, temperature are tabled look-up acquisition, D × (h1-h3) may be characterized as
Current boiler caloric value containing boiler efficiency；
f(·)：Function is converted, is mark coal amount by the conversion of boiler caloric value.
(2) regulated variable of PID is identical with traditional calorific value corrective loop in calorific value corrective loop, is chosen for unit fuel quantity.
The output of PID is calorific value correction coefficient K1.Because of K1It is calculated by carbonated drink caloric receptivity in boiler, therefore when boiler is imitated
When rate does not change, it may be characterized as the variable quantity of unit fuel value.To ensure the accuracy of calorific value corrective loop, its
PID controller is only adjusted when unit load is stablized.
2. steam turbine side Efficiency correction
Square frame 2 in Fig. 2 is turbine efficiency amendment.This programme is band resuperheat unit of steam extraction, according to Rankine
Thermal efficiency of cycle formula can calculate the thermal efficiency of steam turbine：
In formula, ηt：The Rankine cycle thermal efficiency；
Ws：Steam turbine does work；
q：Boiler absorbs heat.
The ratio of Design of Steam Turbine efficiency and current efficiency is corrected boiler calorific value corrective loop.
In formula, K2：Turbine efficiency is to calorific value correction factor；
η0t：Design of Steam Turbine efficiency；
η1t：Steam turbine current efficiency.
Wherein η0tObtained by unit load through f (-) conversion function conversion.
η1tObtained by Rankine cycle thermal efficiency formula.
In formula, a：High pressure cylinder steam extraction share；
i：High pressure cylinder steam extraction series；
n：High pressure cylinder steam extraction is numbered；
x：Steam extraction acting deficiency coefficient, x=(hi-hb)/(h1-hb), hiFor steam extraction enthalpy；
b：Mesolow cylinder steam extraction share；
j：Mesolow cylinder steam extraction series；
m：The steam extraction of mesolow cylinder is numbered；
y：Steam extraction acting deficiency coefficient, y=(hj-h2)/(ha-h2), hjFor steam extraction enthalpy.
It is steam extraction loss share, is obtained by steam extraction amounts at different levels, the computing of steam extraction parameter.
3. the exhaust enthalpy based on broad sense radial base neural net calculates
To simplify Logical Configuration and calculation amount in DCS, system input parameter is reduced to：The power of the assembling unit, main steam enthalpy, reheating
Steam enthalpy, exhaust steam pressure, penultimate stage steam extraction enthalpy, are represented with matrix X；System output is exhaust enthalpy, is represented with matrix Y.
Radial basis function uses Gaussian functionSystem output is represented by：
In formula：
dmaxMaximum Euclidean distance between center of a sample, I are center of a sample's number.
Center of a sample determines
(1) hidden node number I is determined according to unit load and exhaust steam pressure；
(2) I different typical samples are randomly selected in input sample as cluster centre (ti(n) (i=(1,
2 ..., I), n is iterations), if n=0, effective expertise can reduce iterative calculation amount；
(3) all 2- norms of the input sample away from each center are calculated, | | Xk-ti(n) | |, k=(1,2 ..., be m) sample
Number, and to each input sample XkSorted out by minimum euclidean distance；
(4) center of a sample is recalculated
(5) terminate when error is less than setting value, otherwise return to (3).
4. calorific value exports boiler master and corrects
Fuel quantity instruction is to be exported through the revised boiler master of calorific value, and calculation formula is：
Bs=Bout×K1×K2
Fig. 3, Fig. 4 are this programme practical application effect figure.When unit back pressuce is with load and variation of ambient temperature, unit heat
It is normal to be worth corrective loop action, unit efficiency change caused by steam turbine efficiency is not included in calorific value corrective loop.
Embodiment described above is only that the preferred embodiment of the present invention is described, but is not limited to this, this
The technical staff in field is easy to understand according to above-described embodiment the spirit of the present invention, and makes different amplification and change, but
Without departing from the spirit of the present invention, all within protection scope of the present invention.
Claims (10)
1. one kind is based on the modified coordinated control system calorific value bearing calibration of turbine efficiency, it is characterised in that for steam turbine
Efficiency change, is modified boiler master in coordinated control system.
2. one kind according to claim 1 is based on the modified coordinated control system calorific value bearing calibration of turbine efficiency, its
It is characterized in that, it includes the following steps：
A, boiler side calorific value corrective loop is corrected；
B, steamer pusher side Efficiency correction；
C, the exhaust enthalpy based on broad sense radial base neural net calculates；
D, calorific value exports boiler master and corrects.
3. one kind according to claim 2 is based on the modified coordinated control system calorific value bearing calibration of turbine efficiency, its
It is characterized in that, the step A includes the following steps：
Mark coal amount of the setting value of PID regulator needed for the current thermic load of boiler；The setting value of the PID tune machine passes through public affairs
Formula (a) calculates；
Brs=f (D × (h1-h3)+D1×(ha-hb)) formula (a)
In formula (a), Brs：The setting value of PID regulator；
D：Main steam flow, is obtained by formula (b), is converted by first stage pressure；
h1：Boiler export main steam enthalpy, is tabled look-up acquisition by the setting value of current unit main steam temperature, pressure；
h3：Boiler inlet feeds water enthalpy, is tabled look-up acquisition by economizer entrance feed pressure, temperature, D1：Reheated steam flow, by formula
(b) obtain；
hb：High outlet steam enthalpy, is tabled look-up acquisition by the high outlet vapor (steam) temperature of current unit, the setting value of pressure；
ha：Intermediate pressure cylinder inlet steam enthalpy, intermediate pressure cylinder inlet steam pressure, temperature are tabled look-up acquisition, D × (h1-h3) may be characterized as containing pot
The current boiler caloric value of the efficiency of furnace；
f(·)：Function is converted, is design mark coal amount by boiler heat load conversion；
In formula (b), D10、pr、tr0、pr0、trRespectively reheated steam flow design value, pressure design value, temperature design value, reality
Border reheated steam pressure, temperature；
The regulated variable of PID is identical with traditional calorific value corrective loop in calorific value corrective loop, is chosen for unit fuel quantity.
4. one kind according to claim 3 is based on the modified coordinated control system calorific value bearing calibration of turbine efficiency, its
It is characterized in that, the step B is the adjusted coefficient K by turbine thermodynamic efficiency to calorific value2, to boiler calorific value corrective loop into
Row correction, K2Calculated by formula (c)；
In formula (c), K2：Turbine thermodynamic efficiency is to calorific value correction factor；η0t：The Design of Steam Turbine thermal efficiency；η1t：Steam turbine is current
The thermal efficiency.
5. one kind according to claim 4 is based on the modified coordinated control system calorific value bearing calibration of turbine efficiency, its
Be characterized in that, when steam turbine without steam extraction without resuperheat system when, according to formula (e) calculate the current thermal efficiency of steam turbine；
In formula (e), h1：Turbine inlet enthalpy, is tabled look-up acquisition by turbine inlet vapor (steam) temperature, pressure set points；h2：For
Turbine discharge enthalpy, difference meter is carried out by unit current loads, main steam enthalpy, reheated steam enthalpy, exhaust steam pressure, exhaust temperature
Calculate and obtain；h3：Boiler inlet feeds water enthalpy, is tabled look-up acquisition by feed pressure, temperature.
6. one kind according to claim 4 is based on the modified coordinated control system calorific value bearing calibration of turbine efficiency, its
It is characterized in that, when steam turbine is without steam extraction once reheating, the current thermal efficiency of steam turbine is calculated according to formula (f)；
In formula (f), ha：Reheated steam enthalpy, is tabled look-up acquisition by reheat steam temperature setting value, pressure；hb：High pressure cylinder exhaust enthalpy,
Tabled look-up acquisition by exhaust temperature of HP, pressure.
7. one kind according to claim 4 is based on the modified coordinated control system calorific value bearing calibration of turbine efficiency, its
It is characterized in that, when steam turbine has steam extraction without resuperheat, the current thermal efficiency of steam turbine is calculated according to formula (g)；
In formula (g), a：Steam extraction share；i：Steam extraction series；n：Steam extraction is numbered；x：Steam extraction acting deficiency coefficient, x=(hi-hb)/
(h1-hb), hiFor steam extraction enthalpy；It is steam extraction loss share, is obtained by steam extraction amounts at different levels, the computing of steam extraction parameter.
8. one kind according to claim 4 is based on the modified coordinated control system calorific value bearing calibration of turbine efficiency, its
It is characterized in that, when steam turbine has steam extraction and resuperheat, the current thermal efficiency of steam turbine is calculated according to formula (h)；
In formula (h), a：High pressure cylinder steam extraction share；i：High pressure cylinder steam extraction series；n：High pressure cylinder steam extraction is numbered；x：Steam extraction is done work not
Sufficient coefficient, x=(hi-hb)/(h1-hb), hiFor steam extraction enthalpy；b：Mesolow cylinder steam extraction share；j：Mesolow cylinder steam extraction series；m：In
Low pressure (LP) cylinder steam extraction is numbered；y：Steam extraction acting deficiency coefficient, y=(hj-h2)/(ha-h2), hjFor steam extraction enthalpy；
It is steam extraction loss share, is obtained by steam extraction amounts at different levels, the computing of steam extraction parameter.
9. one kind according to claim 8 is based on the modified coordinated control system calorific value bearing calibration of turbine efficiency, its
It is characterized in that, the step D：Command fuel amount Bs is to be exported through the revised boiler master of calorific value, and calculation formula (i) is：
Bs=Bout×K1×K2Formula (i)
In formula (i), BoutExported for boiler master；K1Output for PID is calorific value correction coefficient, is recepted the caloric by carbonated drink in boiler
It is calculated；K2：Turbine thermodynamic efficiency is to calorific value correction factor.
10. one kind according to claim 9 is based on the modified coordinated control system calorific value bearing calibration of turbine efficiency, its
It is characterized in that, the step C is：
System input parameter is chosen for：The power of the assembling unit, main steam enthalpy, reheated steam enthalpy, exhaust steam pressure, each steam extraction enthalpy, with matrix X
Represent；
System output is exhaust enthalpy, is represented with matrix Y；
Radial basis function uses Gaussian function
System output is represented by formula (j)：
In formula (j)：
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The center of a sample determines by the following method：
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2) I different typical samples are randomly selected in input sample as cluster centre (ti(n) (i=(1,2 ..., I), n
For iterations), if n=0, effective expertise can reduce iterative calculation amount；
3) all 2- norms of the input sample away from each center are calculated, | | Xk-ti(n) | |, k=(1,2 ..., be m) number of samples,
And to each input sample XkSorted out by minimum euclidean distance；
4) center of a sample is recalculated
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5) terminate when error is less than setting value, otherwise return to step 3).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108875248A (en) * | 2018-06-29 | 2018-11-23 | 国网山东省电力公司电力科学研究院 | A kind of back pressure turbine fair curve calculation method |
| CN108983596A (en) * | 2018-08-08 | 2018-12-11 | 太原理工大学 | ORC system Single Neuron Controller and its control method based on broad sense cross-entropy algorithm |
| CN110222358A (en) * | 2019-04-16 | 2019-09-10 | 华电电力科学研究院有限公司 | For the modified numerical computation method of different load tubine heat consumption rate |
| CN114488787A (en) * | 2021-10-29 | 2022-05-13 | 国网山东省电力公司电力科学研究院 | Coordinated control method and device for heat supply thermal power generating unit and computer equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481598A (en) * | 2014-11-07 | 2015-04-01 | 广东大唐国际潮州发电有限责任公司 | Online sliding pressure optimization method for turbine of thermal power plant |
| CN104932310A (en) * | 2015-06-05 | 2015-09-23 | 山东电力研究院 | Self-adaptive coal quality adjustment system and method in RUNBACK (RB) process |
| JP2016180573A (en) * | 2015-03-25 | 2016-10-13 | 三浦工業株式会社 | Boiler system |
| CN205842637U (en) * | 2016-06-07 | 2016-12-28 | 河北省电力建设调整试验所 | A kind of Directed Energy Balance Coordinated Control control system for large-size circulating fluidized bed unit |
| CN106960113A (en) * | 2017-04-12 | 2017-07-18 | 西安热工研究院有限公司 | A kind of divisions of responsibility method on single shaft combined cycle generating unit performances acceptance Zhong Ji Dao Yulu islands |
-
2017
- 2017-10-13 CN CN201710951869.8A patent/CN107908103B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481598A (en) * | 2014-11-07 | 2015-04-01 | 广东大唐国际潮州发电有限责任公司 | Online sliding pressure optimization method for turbine of thermal power plant |
| JP2016180573A (en) * | 2015-03-25 | 2016-10-13 | 三浦工業株式会社 | Boiler system |
| CN104932310A (en) * | 2015-06-05 | 2015-09-23 | 山东电力研究院 | Self-adaptive coal quality adjustment system and method in RUNBACK (RB) process |
| CN205842637U (en) * | 2016-06-07 | 2016-12-28 | 河北省电力建设调整试验所 | A kind of Directed Energy Balance Coordinated Control control system for large-size circulating fluidized bed unit |
| CN106960113A (en) * | 2017-04-12 | 2017-07-18 | 西安热工研究院有限公司 | A kind of divisions of responsibility method on single shaft combined cycle generating unit performances acceptance Zhong Ji Dao Yulu islands |
Non-Patent Citations (5)
| Title |
|---|
| 于朝晖等: "智能积分在机组协调控制系统中的应用", 《河北电力技术》 * |
| 倪敏等: "超临界空冷机组协调控制中新型热值校正方法的研究与应用", 《热力发电》 * |
| 殷喆等: "６６０ＭＷ超临界机组协调控制系统的优化", 《河北电力技术》 * |
| 王建中: "600MW机组协调控制系统分析与优化", 《工程科技Ⅱ辑》 * |
| 陈敏等: "1000MW超超临界机组协调优化控制策略及应用", 《自动化仪表》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108875248A (en) * | 2018-06-29 | 2018-11-23 | 国网山东省电力公司电力科学研究院 | A kind of back pressure turbine fair curve calculation method |
| CN108983596A (en) * | 2018-08-08 | 2018-12-11 | 太原理工大学 | ORC system Single Neuron Controller and its control method based on broad sense cross-entropy algorithm |
| CN110222358A (en) * | 2019-04-16 | 2019-09-10 | 华电电力科学研究院有限公司 | For the modified numerical computation method of different load tubine heat consumption rate |
| CN114488787A (en) * | 2021-10-29 | 2022-05-13 | 国网山东省电力公司电力科学研究院 | Coordinated control method and device for heat supply thermal power generating unit and computer equipment |
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