CN102251926B - Turbulence suppression method of wind driven generator - Google Patents
Turbulence suppression method of wind driven generator Download PDFInfo
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Abstract
The invention relates to a turbulence suppression method of a wind driven generator. The method comprises the following steps: 1) measuring a full-directional prewarning wind speed by arranging a wind speed measuring tower around the wind driven generator as a center; 2) measuring the real-time wind speed information of the wind driven generator through a wind speed sensor on the wind driven generator; 3) acquiring a forecast additional pitch angle and a forecast additional torque through the full-directional prewarning wind speed; and 4) regulating the operation of the wind driven generator through the forecast additional pitch angle and the forecast additional torque, thus the suppression of turbulence is realized. According to the invention, the turbulence situation around the wind driven generator is forecast, the forecast accelerates the response of a pitch system to the turbulence, when the turbulence occurs, the wind driven generator has regulated blades of wind wheels for coping, the normal steady operation of the wind driven generator set under the turbulence is ensured, the power output is kept at a rated value constantly, and the overspeed phenomenon is avoided.
Description
Technical field
The present invention relates to operation and the control technique of Large-scale Wind Turbines, the load that relates in particular to wind power generating set is alleviated, optimisation technique, is a kind of wind-driven generator turbulent flow inhibition method.
Background technique
For guaranteeing Security and the reliable operation steady in a long-term of wind power generating set, the design of wind power generating set need be considered the influence of running environment condition and electric power environmental, and these influences are mainly reflected in several aspects such as load, shelf life and proper functioning.All kinds of environmental conditionss are divided into normal external condition and extreme external condition, and what wherein normal external condition related to is chronic fatigue load and running state.Extreme external condition chance occurs seldom, but it is potential critical outside design condition.The design of wind-powered electricity generation unit load need be considered these external conditions and wind energy conversion system operating mode simultaneously.
The power output of wind power generating set increases along with wind speed, up to reaching rated power output, after this, and even wind speed increases, the constant rating number that remains on of power output.This controls wind speed round by regulating propeller pitch angle usually, is accompanied by the increase of wind speed, and alternator speed and the output of generator thus can be more constant.
Turbulent flow is the process of a complexity, is difficult to represent or predict with simple clear and definite equation.Generally speaking, the statistical property of research turbulent flow seems even more important.Turbulence intensity (turbulence intensity, be abbreviated as TI) refer to wind speed change at random amplitude size in 10 minutes, be 10 minutes mean wind velocitys standard deviation and the same period mean wind velocity ratio, being the normal fatigue load of bearing in the wind-powered electricity generation unit operation, is one of important parameter of IEC61400-1 blower fan safety class classification.In reality, the variation of turbulent flow not merely is reflected in the sudden change of wind speed, influence owing to each side such as landform also can produce unexpected variation under certain condition to wind direction in some areas, known common way only can be predicted the wind speed sudden change on the contrary wind wind direction at present, variation for wind direction does not have corresponding handling, and the inhibition of turbulent flow is had certain narrow limitation.
Summary of the invention
The problem to be solved in the present invention is: wind-driven generator is under the turbulent flow wind regime, particularly under Tu Bian the turbulent flow wind regime, wind symmetry properties load and wind speed round, bigger vibration can appear in output power, be difficult to stable operation, the hypervelocity phenomenon is remarkable, and can reduce the wind power generating set life-span, existing turbulent flow suppress way only consider against the wind to measuring wind speed, sudden change for wind direction is not handled, need a kind of more stabilizing effective method to suppress the turbulent flow wind regime, comprise the sudden change of wind speed and direction to the influence of wind-driven generator, make the wind-driven generator also can stable operation under the turbulent flow wind regime.
Technological scheme of the present invention is: a kind of wind-driven generator turbulent flow inhibition method, every typhoon power generator to wind power generating set is provided with omnidirectional wind energy prediction measuring wind speed tower, dynamic Feedforward controller, pitch-variable system and generator converter, realizes that by following steps turbulent flow suppresses:
1), omnirange early warning measuring wind speed: be the center of circle with the wind-driven generator, outwards evenly mark off 8 directions, between distance wind-driven generator 100-200 rice scope, on described 8 directions, the measuring wind speed tower is set respectively, described measuring wind speed tower and wind-driven generator horizontal axis equal height, the wind speed that all measuring wind speed towers are measured obtains omnirange early warning wind speed;
2), this machine measuring wind speed: record the real-time wind speed information of this wind-driven generator in real time by the air velocity transducer on the wind-driven generator, described real-time wind speed information is used for the real-time control of wind power generator control system;
3), early warning data parametersization: the omnirange early warning wind speed that wind-driven generator master control system obtains according to step 1), in conjunction with wind-driven generator current the wind wheel direction, be the center of circle with the wind-driven generator, the wind wheel surface of revolution of wind-driven generator is the X-axis plane, the wind wheel surface of revolution vertically to being Y-axis, the early warning wind speed of 8 directions is carried out resolution of vectors, be decomposed into two the wind speed components parallel with vertical with the wind wheel surface of revolution: X-axis wind speed component and Y-axis wind speed component, Y-axis wind speed component is introduced the dynamic Feedforward controller, calculate the additional propeller pitch angle of prediction according to wind speed-propeller pitch angle curvimeter, calculate the prediction additional torque according to wind speed-power curve, described dynamic Feedforward controller is an additional feedforward path of wind turbine control system; Rotary speed information and the moment information of generator converter output generator are as the real time data of wind-driven generator;
4), torque and change slurry is apart from controlling: the dynamic Feedforward controller is adjusted the operation of wind-driven generator, the prediction that the dynamic Feedforward controller will calculate adds the control system of propeller pitch angle, prediction additional torque input wind-driven generator, calculate wind-driven generator propeller pitch angle and the torque control command of coming with the real time data of wind-driven generator and carry out mathematical addition, obtain propeller pitch angle instruction and electromagnetic torque instruction, propeller pitch angle instruction input pitch-variable system, electromagnetic torque instruction input generator converter, adjust the operation of wind-driven generator, realize the inhibition to turbulent flow.
As preferably, division direction in, the 0:00 direction of one of them and wind driven generator yaw position transducer, the encoder of namely going off course is output as the direction unanimity of the point of minimum value.
During the early-warning parameters datumization, experience correction scaling factor K is set in the dynamic Feedforward controller, with multiply each other according to the additional propeller pitch angle of prediction that wind speed-the propeller pitch angle curvimeter is calculated with according to the prediction additional torque that wind speed-power curve calculates, described coefficient is the data between the 0-1, test back definite at the scene according to the geographical environment of wind-driven generator locality and the actual change situation of wind speed, so that wind-driven generator is when meeting with turbulent flow, the fluctuation of wind speed is littler to be principle, revises adjustment to predicting additional propeller pitch angle and prediction additional torque.
Wind power generator control system comprises torque controller and rotational speed governor, move torque control strategy and feather control strategy respectively, when step 2) the real-time wind speed of the wind-driven generator that records is when rated wind speed fluctuates, keep the operation of operation torque control strategy and feather control strategy simultaneously, described floating set domain of walker according to the service condition of wind-driven generator, generator torque information is through PID control input torque controller, with prediction additional torque stack back output torque control command; The input of rotational speed governor comprises rotating speed deviation and torque deviation, the rotating speed deviation is that the setting rotating speed of generator speed and wind-driven generator obtains through PID control, torque deviation is obtained by the generator torque of measuring and the setpoint torque of wind-driven generator, torque deviation and rotating speed deviation generate the associating deviation, and the propeller pitch angle instruction that the associating deviation forms adds that the additional propeller pitch angle instruction of prediction back forms final propeller pitch angle instruction.
Wind power generating set of the present invention adopts the doubly-fed variable-speed constant-frequency technology, pitch-variable system be electric variable pitch apart from system, generator converter is double-feed current transformer, wherein electric variable pitch drives with different angles every blade of wind-driven generator impeller apart from system.
Under the turbulent flow wind regime of sudden change, the violent conversion time that wind speed, turbulent flow and wind are cut edge is less at interval, in this case, reduce the asymmtric load of wind wheel and make the common ratio output of wind power generating set constant, need the blower fan master control system can access interior forecasting wind speed amount data of short time, thereby can calculate propeller pitch angle and torque after a period of time in advance.Because the variation complexity of turbulent flow, the measurement place of wind speed is extremely important to predicting; According to existing pitch-variable system allround die holder, the response time of pitch-controlled system about 0.3 second, comprehensive above many-sided factor, the present invention has determined the scope measuring wind the best with 100～200 meters of distance wind-driven generator.By the present invention, can change propeller pitch angle in advance according to turbulent flow, alleviate the load of blower fan, stabilized (steady-state) speed, the working life of prolongation blower fan.The wind speed that wind speed early warning of the present invention can shift to an earlier date on 8 directions of 4 seconds precognitions at least changes, and carries out the prediction data parametrization.
The present invention is based on current wind speed and the turbulent flow situation of measurement, adopt omnirange wind Predicting Technique, resolution of vectors algorithm, feedforward control technology, predict the influence that turbulent flow will produce unit in advance, additional propeller pitch angle and additional torque and control data addition in real time with the early warning wind speed, in advance turbulent flow is carried out pretreatment, carry out the variation of propeller pitch angle and torque in advance, when guaranteeing that turbulent flow produces, the rotating speed of blower fan is steady, effectively reduces the asymmtric load of wind power generating set.
Comprehensive the above, the present invention is by the turbulent flow conditions of prediction, the dynamic load of each blade of perception wind power generating set, before at least one blade place turbulent flow dynamic change, dynamically control the respective vanes propeller pitch angle of wind power generating set based on the wind turbulent flow of institute's sensing, thereby reduce because the wind wheel that the wind turbulent flow causes flies symmetry properties load at described wind wheel, wind-driven generator can in time be adjusted when wind speed suddenlys change, realize stable operation, prolong the described wind power generating set life-span.Prediction in advance makes pitch-variable system accelerate the response of turbulent flow, when turbulent flow took place, wind-driven generator had been adjusted the blade of wind wheel and has been carried out reply, guaranteed the normal stable operation of wind power generating set under turbulent flow, the constant rating number that remains on of power output is avoided the phenomenon that exceeds the speed limit.
Description of drawings
The measuring wind speed tower arranged direction schematic representation that Fig. 1 measures for wind speed early warning of the present invention.
Fig. 2 arranges high-level schematic for the measuring wind speed tower that wind speed early warning of the present invention is measured.
Fig. 3 is wind powered generator system structural representation of the present invention.
Fig. 4 is the control system structural drawing of wind-driven generator of the present invention.
Fig. 5 is control flow chart of the present invention.
Fig. 6 changes the speed curves comparison diagram for wind speed of the present invention.
Embodiment
Every typhoon power generator to wind power generating set is provided with omnidirectional wind energy prediction measuring wind speed tower, dynamic Feedforward controller, pitch-variable system and generator converter, realizes that by following steps turbulent flow suppresses:
1), omnirange early warning measuring wind speed: be the center of circle with the wind-driven generator, outwards evenly mark off 8 directions, between distance wind-driven generator 100-200 rice scope, on described 8 directions, the measuring wind speed tower is set respectively, more anemometer towers are set in theory can better measure the variation of omnirange wind speed, but consider that the difficulty of enforcement and the anemometer tower that complexity of calculation arranges 8 directions can reflect that reverse wind speed changes.Described measuring wind speed tower and wind-driven generator horizontal axis equal height also have the measuring position of wind speed and the same height of wheel hub of wind-driven generator, and the wind speed that all measuring wind speed towers are measured obtains omnirange early warning wind speed; See figures.1.and.2, on 8 directions centered by blower fan, the measuring wind speed tower is set evenly, the survey wind position of measuring wind speed tower and engine rooms of wind power generators wheel hub co-altitude place, as preferably, divide direction in, the 0:00 direction of one of them and wind driven generator yaw position transducer, the encoder of namely going off course is output as the direction unanimity of the point of minimum value, conveniently to carry out resolution of vectors and the calculating of wind speed, the measuring wind speed tower apart from this blower fan 100-200 rice, the measuring wind speed tower is positioned on the same circumference centered by wind-driven generator, guarantees that the control system of blower fan can also have enough response times under the wind speed sudden change of sudden change 25 meter per seconds;
2), this machine measuring wind speed: record the real-time wind speed information of this wind-driven generator in real time by the air velocity transducer on the wind-driven generator, described real-time wind speed information is used for the corresponding control in real time of the control system of traditional wind;
3), early warning data parametersization: the omnirange early warning wind speed that wind-driven generator master control system obtains according to step 1), in conjunction with wind-driven generator current the wind wheel direction, be the center of circle with the wind-driven generator, the wind wheel surface of revolution of wind-driven generator is the X-axis plane, the wind wheel surface of revolution vertically to being Y-axis, the early warning wind speed of 8 directions is carried out resolution of vectors, be decomposed into two the wind speed components parallel with vertical with the wind wheel surface of revolution: X-axis wind speed component and Y-axis wind speed component, wherein X-axis wind speed component is quite little for the influence of blower fan, can ignore, Y-axis wind speed component is introduced the dynamic Feedforward controller, calculate the additional propeller pitch angle of prediction according to wind speed-propeller pitch angle curvimeter, calculate the prediction additional torque according to wind speed-power curve, wind speed-propeller pitch angle curve and wind speed-power curve are also inequality according to the different designs of various types, specifically with reference to the wind-driven generator design handbook of each wind-driven generator producer, described dynamic Feedforward controller is an additional feedforward path of wind turbine control system; Rotary speed information and the moment information of generator converter output generator are as the real time data of wind-driven generator;
4), torque and change slurry is apart from controlling: the dynamic Feedforward controller is adjusted the operation of wind-driven generator, the prediction that the dynamic Feedforward controller will calculate adds the control system of propeller pitch angle, prediction additional torque input wind-driven generator, calculate wind-driven generator propeller pitch angle and the torque control command of coming with the real time data of wind-driven generator and carry out mathematical addition, obtain propeller pitch angle instruction and electromagnetic torque instruction, propeller pitch angle instruction input pitch-variable system, electromagnetic torque instruction input generator converter, adjust the operation of wind-driven generator, realize the inhibition to turbulent flow.
As Fig. 4, wind power generator control system comprises torque controller and rotational speed governor, move torque control strategy and feather control strategy respectively, when step 2) the real-time wind speed of the wind-driven generator that records is when rated wind speed fluctuates, keep the operation of operation torque control strategy and feather control strategy simultaneously, described floating set domain of walker according to the service condition of wind-driven generator, domain of walker as 20%, generator torque information is through PID control input torque controller, with prediction additional torque stack back output torque control command; The input of rotational speed governor comprises rotating speed deviation and torque deviation, the rotating speed deviation is that the setting rotating speed of generator speed and wind-driven generator obtains through PID control, torque deviation is obtained by the generator torque of measuring and the setpoint torque of wind-driven generator, torque deviation and rotating speed deviation generate the associating deviation, and the propeller pitch angle instruction that the associating deviation forms adds that the additional propeller pitch angle instruction of prediction back forms final propeller pitch angle instruction.The torque control strategy here and feather control strategy are in " a kind of MW class blower fan jointly control strategy " patent publication No.: existing open among the CN101660489A, no longer describe in detail.
During the early-warning parameters datumization, experience correction scaling factor K is set in the dynamic Feedforward controller, with multiply each other according to the additional propeller pitch angle of prediction that wind speed-the propeller pitch angle curvimeter is calculated with according to the prediction additional torque that wind speed-power curve calculates, described coefficient is the data between the 0-1, test back definite at the scene according to the geographical environment of wind-driven generator locality and the actual change situation of wind speed, so that wind-driven generator is when meeting with turbulent flow, the fluctuation of wind speed is littler to be principle, revises adjustment to predicting additional propeller pitch angle and prediction additional torque.
Adopt experience correction scaling factor K in the feedforward controller of the present invention, this coefficient is the data between the 0-1.This coefficient directly acts on pitch and the torque instruction of prediction.Test at the scene according to the geographical environment of locality and the actual change situation of wind speed, so that blower fan is when meeting with turbulent flow, the fluctuation of wind speed is littler to be adjusted for principle.Also can analogize adjustment according to the posterior infromation at conditions of similarity scene.Because the generation of turbulent flow is subjected to many-sided influences such as atmosphere and orographic factor, system model can not set up precise math model, the additional propeller pitch angle and the additional torque that obtain according to the early warning data are not quite similar for the influence that single blower fan produces.Introducing correction factor K is exactly in order to solve the individual difference of different wind fields, to expand the applicability of this method.
With reference to Fig. 3, the system that schematically demonstrates wind-driven generator of the present invention among the figure forms, comprise compositions such as column foot controller CPU and IO, generator converter, cabin remote I, this wind-driven generator wind speed measuring device, pitch-variable system one-level wind speed prior-warning device, wind speed early warning measuring device comprises wind energy prediction measuring wind speed tower and dynamic Feedforward controller, and the wind speed prewarning information of 8 directions of 4s-8s is provided for blower fan by wind speed early warning measuring device.Wind speed early warning data are amplified by signal or field bus communication is delivered to the wind power generating set master control system, and controller carries out the resolution of vectors of wind speed for the wind speed of 8 directions in conjunction with present blower fan position, obtains the Y-axis component vertical with the wind wheel surface of revolution.With additional propeller pitch angle and the additional torque instruction of this component because respectively going into feedforward controller and obtaining predicting, extra-instruction produces final propeller pitch angle and torque instruction after superposeing with current real time control command.Thereby the asymmtric load of the wind-driven generator group wind-wheel of alleviating turbulent flow and producing and the hypervelocity on a large scale of rotating speed.
With reference to Fig. 4 and Fig. 5, adopt 8 direction wind speed situations of change after wind speed early warning metering system can be predicted 4s-8s in advance.Wind power generator control system can be made corresponding parameter adjustment in advance according to the early warning data, carries out the adjustment of propeller pitch angle and torque in advance.Because the loading of torque is to be finished by generator converter, the generator converter on the market all can be finished the loading procedure from 0 torque to the full power torque, torque transformation period abundance in 4s now.And propeller pitch angle is because the required propeller pitch angle of power control only has 0-35 ° of interval (to see Science Press's in September, 2007 front page " wind technology ", beautiful Tony Burton work, Wu Xin etc. translate 298 pages) present electric variable propeller system can guarantee to carry out the change oar speed of 9 °/s, 4s can cover the propeller pitch angle interval of whole controlled powers, thereby has guaranteed the complete adjustability of wind-driven generator under the present invention.
The topmost uncontrollable factor of wind power generating set is the wind speed of change at random, it is the external disturbance of influence control quality maximum. by cybernetics as can be known, system interference is divided into external disturbance and internal disturbance, disturbing though can measure to disturb with immeasurability. wind speed is that we are uncontrollable, but it is the significant variable that must monitor constantly in the wind-powered electricity generation unit operation, therefore it belongs to measurable external disturbance. and the rapidity of wind-power generating system dynamic response is not ideal enough, add dynamic Feedforward control, can eliminate randomness greatly and disturb influence to system outward, and can further improve the control quality.By this way, can carry out to a certain degree inhibition to the turbulent flow of wind-driven generator, its emulation speed curves is referring to Fig. 6.When not adopting the inventive method, blower fan is when meeting with turbulent flow, and the fluctuation of rotating speed is very obvious, no matter is that the scope of fluctuation or the time of fluctuating are all bigger.After adopting the inventive method, though the rotating speed of blower fan has some decline before turbulent flow, whole fluctuation of speed scope and time have all obtained reasonable control, and the operation of blower fan is more steady, submissive, and turbulent flow has obtained reasonable inhibition.Emulation for the wind direction variation, owing to carried out resolution of vectors for wind speed, its result is all similar with Fig. 5, but because wind direction is not when vertical with the blower fan surface of revolution, through the wind speed after decomposition all＜25 meter per seconds, its simulation curve is all obvious not as Fig. 6 for the obvious degree that turbulent flow suppresses, and just no longer enumerates here.
Claims (9)
1. wind-driven generator turbulent flow inhibition method, it is characterized in that every typhoon power generator of wind power generating set is provided with omnidirectional wind energy prediction measuring wind speed tower, dynamic Feedforward controller, pitch-variable system and generator converter, realize that by following steps turbulent flow suppresses:
1), omnirange early warning measuring wind speed: be the center of circle with the wind-driven generator, outwards evenly mark off 8 directions, between distance wind-driven generator 100-200 rice scope, on described 8 directions, the measuring wind speed tower is set respectively, described measuring wind speed tower and wind-driven generator horizontal axis equal height, the wind speed that all measuring wind speed towers are measured obtains omnirange early warning wind speed;
2), this machine measuring wind speed: record the real-time wind speed information of this wind-driven generator in real time by the air velocity transducer on the wind-driven generator, described real-time wind speed information is used for the real-time control of wind power generator control system;
3), early warning data parametersization: the omnirange early warning wind speed that wind-driven generator master control system obtains according to step 1), in conjunction with the current wind wheel direction of wind-driven generator, be the center of circle with the wind-driven generator, the wind wheel surface of revolution of wind-driven generator is the X-axis plane, the wind wheel surface of revolution vertically to being Y-axis, the early warning wind speed of 8 directions is carried out resolution of vectors, be decomposed into two the wind speed components parallel with vertical with the wind wheel surface of revolution: X-axis wind speed component and Y-axis wind speed component, Y-axis wind speed component is introduced the dynamic Feedforward controller, calculate the additional propeller pitch angle of prediction according to wind speed-propeller pitch angle curvimeter, calculate the prediction additional torque according to wind speed-power curve, described dynamic Feedforward controller is an additional feedforward path of wind turbine control system; Rotary speed information and the moment information of generator converter output generator are as the real time data of wind-driven generator;
4), torque and feather control: the dynamic Feedforward controller is adjusted the operation of wind-driven generator, the prediction that the dynamic Feedforward controller will calculate adds the control system of propeller pitch angle, prediction additional torque input wind-driven generator, carry out mathematical addition with wind-driven generator propeller pitch angle and torque control command that the real time data of wind-driven generator calculates, obtain propeller pitch angle instruction and electromagnetic torque instruction, propeller pitch angle instruction input pitch-variable system, electromagnetic torque instruction input generator converter, adjust the operation of wind-driven generator, realize the inhibition to turbulent flow.
2. a kind of wind-driven generator turbulent flow inhibition method according to claim 1, in the direction that it is characterized in that dividing, the 0:00 direction of one of them and wind driven generator yaw position transducer, the encoder of namely going off course is output as the direction unanimity of the point of minimum value.
3. a kind of wind-driven generator turbulent flow inhibition method according to claim 1 and 2, when it is characterized in that the early warning data parameters, experience correction scaling factor K is set in the dynamic Feedforward controller, with multiply each other according to the additional propeller pitch angle of prediction that wind speed-the propeller pitch angle curvimeter is calculated with according to the prediction additional torque that wind speed-power curve calculates, described coefficient is the data between the 0-1, test back definite at the scene according to the geographical environment of wind-driven generator locality and the actual change situation of wind speed, so that wind-driven generator is when meeting with turbulent flow, the fluctuation of wind speed is littler to be principle, revises adjustment to predicting additional propeller pitch angle and prediction additional torque.
4. a kind of wind-driven generator turbulent flow inhibition method according to claim 1 and 2, it is characterized in that wind power generator control system comprises torque controller and rotational speed governor, move torque control strategy and feather control strategy respectively, when step 2) the real-time wind speed of the wind-driven generator that records is when rated wind speed fluctuates, keep the operation of operation torque control strategy and feather control strategy simultaneously, described floating set domain of walker according to the service condition of wind-driven generator, generator torque information is through PID control input torque controller, with prediction additional torque stack back output torque control command; The input of rotational speed governor comprises rotating speed deviation and torque deviation, the rotating speed deviation is that the setting rotating speed of generator speed and wind-driven generator obtains through PID control, torque deviation is obtained by the generator torque of measuring and the setpoint torque of wind-driven generator, torque deviation and rotating speed deviation generate the associating deviation, and the propeller pitch angle instruction that the associating deviation forms adds that the additional propeller pitch angle instruction of prediction back forms final propeller pitch angle instruction.
5. a kind of wind-driven generator turbulent flow inhibition method according to claim 3, it is characterized in that wind power generator control system comprises torque controller and rotational speed governor, move torque control strategy and feather control strategy respectively, when step 2) the real-time wind speed of the wind-driven generator that records is when rated wind speed fluctuates, keep the operation of operation torque control strategy and feather control strategy simultaneously, described floating set domain of walker according to the service condition of wind-driven generator, generator torque information is through PID control input torque controller, with prediction additional torque stack back output torque control command; The input of rotational speed governor comprises rotating speed deviation and torque deviation, the rotating speed deviation is that the setting rotating speed of generator speed and wind-driven generator obtains through PID control, torque deviation is obtained by the generator torque of measuring and the setpoint torque of wind-driven generator, torque deviation and rotating speed deviation generate the associating deviation, and the propeller pitch angle instruction that the associating deviation forms adds that the additional propeller pitch angle instruction of prediction back forms final propeller pitch angle instruction.
6. a kind of wind-driven generator turbulent flow inhibition method according to claim 1 and 2, it is characterized in that wind power generating set adopts the doubly-fed variable-speed constant-frequency technology, pitch-variable system is that electric variable pitch is apart from system, generator converter is double-feed current transformer, and wherein electric variable pitch drives with different angles every blade of wind-driven generator impeller apart from system.
7. a kind of wind-driven generator turbulent flow inhibition method according to claim 3, it is characterized in that wind power generating set adopts the doubly-fed variable-speed constant-frequency technology, pitch-variable system is that electric variable pitch is apart from system, generator converter is double-feed current transformer, and wherein electric variable pitch drives with different angles every blade of wind-driven generator impeller apart from system.
8. a kind of wind-driven generator turbulent flow inhibition method according to claim 4, it is characterized in that wind power generating set adopts the doubly-fed variable-speed constant-frequency technology, pitch-variable system is that electric variable pitch is apart from system, generator converter is double-feed current transformer, and wherein electric variable pitch drives with different angles every blade of wind-driven generator impeller apart from system.
9. a kind of wind-driven generator turbulent flow inhibition method according to claim 5, it is characterized in that wind power generating set adopts the doubly-fed variable-speed constant-frequency technology, pitch-variable system is that electric variable pitch is apart from system, generator converter is double-feed current transformer, and wherein electric variable pitch drives with different angles every blade of wind-driven generator impeller apart from system.
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| US9534583B2 (en) | 2014-06-17 | 2017-01-03 | General Electric Company | Methods and systems to operate a wind turbine |
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