CN106523279A - Intelligent control compensation method and device for improving wind energy capturing capacity of wind generating set - Google Patents
Intelligent control compensation method and device for improving wind energy capturing capacity of wind generating set Download PDFInfo
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- CN106523279A CN106523279A CN201610877219.9A CN201610877219A CN106523279A CN 106523279 A CN106523279 A CN 106523279A CN 201610877219 A CN201610877219 A CN 201610877219A CN 106523279 A CN106523279 A CN 106523279A
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- 238000000605 extraction Methods 0.000 claims description 21
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- 238000005457 optimization Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010977 unit operation Methods 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/32—Wind speeds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/323—Air humidity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/324—Air pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/325—Air temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses an intelligent control compensation method for improving wind energy capturing capacity of wind generating set. The method comprises the following steps that (1) the local current air densities are obtained through timing calculation with the period of Tcal by measuring the air temperature, the air pressure and the humidity of a field where the wind generating set is located; (2) discrete air density values obtained through calculation are integrated into a plurality of preset interval ranges, and the densities input into a master control system are assigned according to the interval of the actual density; and (3) according to the interval of the current air density value, parameters of a master control program of the wind generating set relevant to density are corrected, when the air density is lower than a preset threshold, a set blade variable function is started before the wind speed reaches the rated wind speed, and the wind generating unit maintains the optimal working state in the changing environment. The invention further provides an intelligent control compensation device for improving wind energy capturing capacity of wind generating set. The method and device improve the wind energy capturing capacity and achieve output optimization under different working conditions.
Description
Technical field
The invention belongs to wind-driven generator control field, is related to a kind of control for lifting wind power generating set Wind energy extraction ability
Compensation method processed and device.
Background technology
Develop to low wind speed, high altitude localities with domestic wind energy turbine set and shift, lift the Wind energy extraction of wind power generating set
Ability becomes more and more important.The control strategy of traditional country's wind power generating set is single, especially airtight only with standard null
Spend to calculate optimum control curve, it is poor to the adaptive faculty of various natural environment.
Under the conditions of not considering different sites or same site different periods, atmospheric density difference goes out to wind power generating set
The impact of power, brings two defects to the Wind energy extraction ability of unit：
(1) when atmospheric density deviates standard air density, unit operation can deviate optimum wind energy utilization, electric field therewith
Generating capacity is less than optimal power generation ability；
(2) under conditions of the air tightness of low latitude, easily there is stall event in unit, and the power curve of actual motion is significantly lower than
Design power curve.
The operation of traditional wind group is broadly divided into 4 stages, and I. perseverances rotating speed (grid-connected rotating speed), II. gear stages (turn
The control of square-rotating speed, follows the trail of optimal wind energy capture), III. perseverances rotating speed (rated power) and IV. invariable powers (pitch control).
In phase il, traditional wind group is controlled by torque-speed, follows the trail of maximal wind-energy utilization rate, used
Formula is：
Tg(w)=Koptwg 2 (1)
K in formulaoptValue is to calculate gained with standard air density, wherein：R is wind wheel radius；λ is tip speed ratio；N
For gear box ratio；Cp(λ) for tip speed ratio when λ power of the assembling unit factor.Standard null is equal in local air density airtight
When spending, Cp(λ) remain maximum Cp.But when local density deviates standard air density, Cp(λ) also deviate maximum C therewithp。
To ensure in this stage, Cp(λ) consistently achieve Cp max, i.e. unit Wind energy extraction ability consistently achieves maximum, need to be to live air
Density carries out real-time monitoring, and by standard air density ρ in formula (2)0It is modified to actual air density value ρ.
In ii I-stage, when local air density is relatively low, near unit operation to rated wind speed, stall is easily produced
Phenomenon.This is because in the case where atmospheric density is low, rated power to be reached needs bigger than under the conditions of standard air density
Wind speed；And bigger wind speed causes in ii I-stage, the tip speed ratio of unit more off-target tip speed ratio causes
The significantly decline of Wind energy extraction ability.
The content of the invention
In order to the Wind energy extraction ability for overcoming the shortcomings of existing wind-driven generator control mode it is relatively low, the invention provides one
Kind lift Wind energy extraction ability, the optimized wind power generating set Wind energy extraction ability that lifted of exerting oneself realized under different operating modes
Based Intelligent Control compensation method and device.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of Based Intelligent Control compensation method for lifting wind power generating set Wind energy extraction ability, the control compensation methods bag
Include following steps：
1) by the temperature in measurement wind power generating set place place, air pressure, humidity, with the cycle as TcalTiming is calculated and is obtained
Expediently instant atmospheric density；TcalSet according to the density fluctuation situation of different wind energy turbine sets；
2) the discrete air density values of gained will be calculated, is incorporated in default several interval ranges, according to reality
Residing for density, the interval density to being input into master control system carries out assignment；
3) it is located according to real-time air density values interval, the parameter related to density in amendment Wind turbines primary control program；
And when atmospheric density is less than predetermined threshold value, set pitch control function is opened before wind speed reaches rated wind speed, wind-driven generator is made
Group keeps optimum working condition in the environment of change as far as possible.
Further, the step 1) in, atmospheric density computing formula is
Wherein：ρ (t) is the atmospheric density under current environment, and unit is kg/m3；ρ0For standard air density；P is to work as front ring
The atmospheric pressure in border, unit are MPa；For the relative humidity of current environment；Temperature of the t for current environment；pbFor environment temperature t
The partial pressure of vapor in lower saturated air.
Further, the step 3) in, when real-time atmospheric density is less than predetermined threshold value, indicate that wind power generating set exists
Wind speed starts before reaching rated wind speed and becomes oar function；Under real-time atmospheric density, according to " specific density difference propeller pitch angle apparatus for lower wind
The C of generating setpPropeller pitch angle is set to optimal value by～λ set of curves " so that in the range of the λ of setting, it is ensured that CpCan get
Maximum.
A kind of Based Intelligent Control compensation device for lifting wind power generating set Wind energy extraction ability, described device include：
Measurement module, for measuring the temperature in wind power generating set place place, air pressure, humidity, with the cycle as TcalRegularly
Calculate and obtain local atmospheric density immediately；TcalSet according to the density fluctuation situation of different wind energy turbine sets；
Computing module, for calculating discrete air density values；
Judge module, for judging the interval range at actual air density place, according to residing for actual density, interval is to defeated
The density for entering master control system carries out assignment；Real-time atmospheric density is judged simultaneously whether less than pre-set threshold value, so as to master control system
Send；
Instruction module, it is interval for being located according to real-time air density values, with density in amendment Wind turbines primary control program
Related parameter；For being less than predetermined threshold value (1.0kg/m in atmospheric density3) when, machine is opened before wind speed reaches rated wind speed
Group becomes oar function, makes wind power generating set keep optimum working condition in the environment of change as far as possible.
Further, in the measurement module, atmospheric density computing formula is
Wherein：ρ (t) is the atmospheric density under current environment, and unit is kg/m3；ρ0For standard air density；P is to work as front ring
The atmospheric pressure in border, unit are MPa；For the relative humidity of current environment；Temperature of the t for current environment；pbFor environment temperature t
The partial pressure of vapor in lower saturated air.
Further, in the judge module, when real-time atmospheric density is less than predetermined threshold value (1.0kg/m3), indicate wind
Power generator group starts change oar function before wind speed reaches rated wind speed；Under real-time atmospheric density, according to " specific density is different
The C of propeller pitch angle apparatus for lower wind generating setpPropeller pitch angle is set to optimal value by～λ set of curves " so that in the range of the λ of setting,
Ensure CpTotal energy can get maximum.
The present invention technology design be：
(1) real-time monitoring is carried out to live atmospheric density, and according to actual air density to wind power generating set ii rank
The control parameter optimal modal gain K of sectionoptIt is modified, it is ensured that in phase il (torque-speed controls the stage), machine
Group can track optimum wind energy utilization C immediatelyp。
(2) by collecting and analyzing under different densities and different propeller pitch angles, the C of wind power generating setp～λ set of curves, can
To obtain the corresponding optimum propeller pitch angles of optimum tip speed ratio λ under different wind speed.If atmospheric density is less than certain critical value (1.0kg/
m3) when, in ii I-stage, open and become oar function, allow unit to follow the trail of optimum propeller pitch angle all the time, so as to obtain under the conditions of this most
Wind-energy capture ability.
Beneficial effects of the present invention are mainly manifested in：Lift Wind energy extraction ability, the wind-power electricity generation realized under different operating modes
The optimization of exerting oneself of unit.
Description of the drawings
Fig. 1 is the theory diagram of the Based Intelligent Control compensation device for lifting wind power generating set Wind energy extraction ability.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Embodiment 1
With reference to Fig. 1, a kind of Based Intelligent Control compensation method of lifting wind power generating set Wind energy extraction ability, the control are mended
Compensation method is comprised the following steps：
1) by the temperature in measurement wind power generating set place place, air pressure, humidity, with the cycle as TcalTiming is calculated and is obtained
Expediently instant atmospheric density；TcalSet according to the density fluctuation situation of different wind energy turbine sets；
2) the discrete air density values of gained will be calculated, is incorporated in default several interval ranges, according to reality
Residing for density, the interval density to being input into master control system carries out assignment；
3) it is located according to real-time air density values interval, the parameter related to density in amendment Wind turbines primary control program；
And predetermined threshold value (1.0kg/m is less than in atmospheric density3) when, set pitch control function is opened before wind speed reaches rated wind speed, is made
Wind power generating set keeps optimum working condition in the environment of change as far as possible.
Further, the step 1) in, atmospheric density computing formula is
Wherein：ρ (t) is the atmospheric density under current environment, and unit is kg/m3；ρ0For standard air density；P is to work as front ring
The atmospheric pressure in border, unit are MPa；For the relative humidity of current environment；Temperature of the t for current environment；pbFor environment temperature t
The partial pressure of vapor in lower saturated air.
Further, the step 3) in, when real-time atmospheric density is less than predetermined threshold value (1.0kg/m3), indicate wind-force
Generating set starts change oar function before wind speed reaches rated wind speed；Under real-time atmospheric density, according to " specific density difference oar
The C of elongation apparatus for lower wind generating setpPropeller pitch angle is set to optimal value by～λ set of curves " so that in the range of the λ of setting, is protected
Card CpMaximum can be got.
Embodiment 2
With reference to Fig. 1, a kind of Based Intelligent Control compensation device of lifting wind power generating set Wind energy extraction ability, described device bag
Include：
Measurement module, for measuring the temperature in wind power generating set place place, air pressure, humidity, with the cycle as TcalRegularly
Calculate and obtain local atmospheric density immediately；TcalSet according to the density fluctuation situation of different wind energy turbine sets；
Computing module, for calculating discrete air density values；
Judge module, for judging the interval range at actual air density place, according to residing for actual density, interval is to defeated
The density for entering master control system carries out assignment；Judge real-time atmospheric density whether less than pre-set threshold value (1.0kg/m simultaneously3), so as to
Master control system is sent and become in advance oar/change oar instruction in advance；
Instruction module, it is interval for being located according to real-time air density values, with density in amendment Wind turbines primary control program
Related parameter；For being less than predetermined threshold value (1.0kg/m in atmospheric density3) when, open unit and become oar function in advance, make wind-force
Generating set keeps optimum working condition in the environment of change as far as possible.
Further, in the measurement module, atmospheric density computing formula is
Wherein：ρ (t) is the atmospheric density under current environment, and unit is kg/m3；ρ0For standard air density；P is to work as front ring
The atmospheric pressure in border, unit are MPa；For the relative humidity of current environment；Temperature of the t for current environment；pbFor environment temperature t
The partial pressure of vapor in lower saturated air.
Further, in the judge module, when real-time atmospheric density is less than predetermined threshold value (1.0kg/m3), indicate wind
Power generator group starts change oar function before wind speed reaches rated wind speed；Under real-time atmospheric density, according to " specific density is different
The C of propeller pitch angle apparatus for lower wind generating setpPropeller pitch angle is set to optimal value by～λ set of curves " so that in the range of the λ of setting,
Ensure CpTotal energy can get maximum.
The course of work of the Based Intelligent Control compensation device of the present embodiment is：
Step 1) according to measurement module measure when ground temperature, air pressure, humidity, instant air is obtained by computing module close
Degree, the counting period is Tcal, atmospheric density computing formula is
Wherein：ρ (t) is the atmospheric density under current environment, and unit is kg/m3；ρ0For standard air density；P is to work as front ring
The atmospheric pressure in border, unit are MPa；For the relative humidity of current environment；Temperature of the t for current environment；pbFor environment temperature t
The partial pressure (device can pass through the environment temperature for measuring, and automatic look-up table is obtained) of vapor in lower saturated air.
Step 2) due to outside air temperature, the ringing of air pressure, calculated air density values are also being continually changing.
Unit operation in phase il, to optimal modal gain KoptIt is modified.To avoid control system from frequently changing KoptSetting
The mode for taking value of regularly tabling look-up is modified by value, judge module to setting value.Concrete operations method is：(a). will be common
Atmospheric density scope [0.8,1.3] with x as step-length, be divided into n it is interval, k-th interval range is [0.8+ (k-1) * x, 0.8+k*
x].(b). the calculating cycle of atmospheric density is Tcal, i.e., every TcalTime Calculation obtains an instant air density values.TcalCan
Set with the density fluctuation situation according to different wind energy turbine sets.If (c). calculated instant atmospheric density is in k-th area
Between, then control system with ρ=0.8+k*x to optimal modal gain KoptIt is modified.
Step 3) if calculated air density values are in interval [0.8,1.0], then instruction module indicates that wind-force is sent out
Group of motors takes control to become oar strategy in ii I-stage, by the propeller pitch angle for changing unit so as in certain tip speed ratio model
In enclosing, Wind energy extraction ability is optimal as far as possible.When air density values are in the range of [0.8,1.0], sentence through device
The density value of disconnected module input unit is 0.8kg/m3Or 0.8+k*x；The value of optimum propeller pitch angle, " air is close can to pass through inquiry
Spend for 0.8kg/m3(or 0.8+k*x kg/m3) when, the C of different propeller pitch angle apparatus for lower wind generating setsp～λ set of curves " is obtained；No
With under the conditions of, the value of optimum propeller pitch angle is counted in master control system, for calling.
Based Intelligent Control compensation method according to the present invention and device according to environmental change, can adjust the control of wind power generating set
Mode processed, by the optimal modal yield value K for 1) periodically changing phase ilopt, and then generator torque is modified, 2)
Under low density condition, intelligence is switched in operation ii I-stage and becomes oar strategy so that unit can be use up under different atmospheric density
The Wind energy extraction efficiency of maximum is tracked possibly.This invention equipment is simple, and method feasibility is strong, can effectively improve wind-force and send out
The adaptive capacity to environment and generating capacity of group of motors.
Technology design only to illustrate the invention and feature, its object is to allow person skilled in the art to understand this above
The content of invention is simultaneously carried out, and can not be limited the scope of the invention with this, all to be done according to spirit of the invention
Equivalence changes or modification be encompassed by protection scope of the present invention.
Claims (6)
1. a kind of Based Intelligent Control compensation method for lifting wind power generating set Wind energy extraction ability, it is characterised in that：The control
Compensation method is comprised the following steps：
1) by the temperature in measurement wind power generating set place place, air pressure, humidity, with the cycle as TcalTiming is calculated is worked as
The instant atmospheric density in ground；TcalSet according to the density fluctuation situation of different wind energy turbine sets；
2) the discrete air density values of gained will be calculated, is incorporated in default several interval ranges, according to actual density
The residing interval density to being input into master control system carries out assignment；
3) it is located according to real-time air density values interval, the parameter related to density in amendment Wind turbines primary control program；And
When atmospheric density is less than predetermined threshold value, set pitch control function is opened before wind speed reaches rated wind speed, makes wind power generating set exist
Keep optimum working condition in the environment of change as far as possible.
2. the Based Intelligent Control compensation method for lifting wind power generating set Wind energy extraction ability as claimed in claim 1, its feature
It is：The step 1) in, atmospheric density computing formula is
Wherein：ρ (t) is the atmospheric density under current environment, and unit is kg/m3；ρ0For standard air density；P is current environment
Atmospheric pressure, unit is MPa；For the relative humidity of current environment；Temperature of the t for current environment；pbFor under environment temperature t
The partial pressure of vapor in saturated air.
3. the Based Intelligent Control compensation method for lifting wind power generating set Wind energy extraction ability as claimed in claim 1, its feature
It is：The step 3) in, when real-time atmospheric density is less than predetermined threshold value, indicate that wind power generating set is reached in wind speed specified
Start before wind speed and become oar function；Under real-time atmospheric density, according to " the C of specific density difference propeller pitch angle apparatus for lower wind generating setp
Propeller pitch angle is set to optimal value by～λ set of curves " so that in the range of the λ of setting, it is ensured that CpMaximum can be got.
4. a kind of Based Intelligent Control compensation method for lifting wind power generating set Wind energy extraction ability as claimed in claim 1 is realized
Device, it is characterised in that：Described device includes：
Measurement module, for measuring the temperature in wind power generating set place place, air pressure, humidity, with the cycle as TcalTiming is calculated
Obtain local atmospheric density immediately；TcalSet according to the density fluctuation situation of different wind energy turbine sets；
Computing module, for calculating discrete air density values；
Judge module, it is for judging the interval range at actual air density place, interval to input master according to residing for actual density
The density of control system carries out assignment；Real-time atmospheric density is judged simultaneously whether less than pre-set threshold value, so as to send to master control system
Become oar/change oar instruction in advance in advance；
Instruction module, it is interval for being located according to real-time air density values, it is related to density in amendment Wind turbines primary control program
Parameter；For when atmospheric density being less than predetermined threshold value, set pitch control function being opened before wind speed reaches rated wind speed, wind is made
Power generator group keeps optimum working condition in the environment of change as far as possible.
5. device as claimed in claim 4, it is characterised in that：In the measurement module, atmospheric density computing formula is
Wherein：ρ (t) is the atmospheric density under current environment, and unit is kg/m3；ρ0For standard air density；P is current environment
Atmospheric pressure, unit is MPa；For the relative humidity of current environment；Temperature of the t for current environment；pbFor under environment temperature t
The partial pressure of vapor in saturated air.
6. the device as described in claim 4 or 5, it is characterised in that：In the judge module, when real-time atmospheric density is less than pre-
If during threshold value (1.0kg/m3), indicating that wind power generating set starts change oar function before wind speed reaches rated wind speed；In real-time empty
Under air tightness, according to " the C of specific density difference propeller pitch angle apparatus for lower wind generating setp～λ set of curves ", propeller pitch angle is set to most
The figure of merit so that in the range of the λ of setting, it is ensured that CpTotal energy can get maximum.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108895673A (en) * | 2018-08-10 | 2018-11-27 | 中国人民解放军32181部队 | A kind of adaptive combustion system of fuel heater unit |
| CN109139366A (en) * | 2018-09-26 | 2019-01-04 | 北京金风科创风电设备有限公司 | Control system for wind farm |
| CN109372690A (en) * | 2018-12-29 | 2019-02-22 | 新疆金风科技股份有限公司 | Poewr control method, device, electronic equipment and the medium of wind power generating set |
| CN110761945A (en) * | 2018-07-27 | 2020-02-07 | 北京金风科创风电设备有限公司 | Blade stall control method and device of wind generating set |
| CN112524081A (en) * | 2020-12-22 | 2021-03-19 | 加弘科技咨询(上海)有限公司 | Fan control method and system of electronic equipment |
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