CN101865079A - Intelligent variable-pitch control system and method for megawatt wind generating set - Google Patents

Intelligent variable-pitch control system and method for megawatt wind generating set Download PDF

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Publication number
CN101865079A
CN101865079A CN201010201478A CN201010201478A CN101865079A CN 101865079 A CN101865079 A CN 101865079A CN 201010201478 A CN201010201478 A CN 201010201478A CN 201010201478 A CN201010201478 A CN 201010201478A CN 101865079 A CN101865079 A CN 101865079A
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China
Prior art keywords
fuzzy
controller
control
signal
deviate
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CN201010201478A
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Inventor
谭福阳
姜杨
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SHENYANG RUIXIANG WIND POWER EQUIPMENT CO Ltd
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SHENYANG RUIXIANG WIND POWER EQUIPMENT CO Ltd
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Priority to CN201010201478A priority Critical patent/CN101865079A/en
Publication of CN101865079A publication Critical patent/CN101865079A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction

Abstract

The invention relates to a control system, in particular to an intelligent variable-pitch control system and an intelligent variable-pitch control method for a megawatt wind generating set. The control system consists of a fuzzy controller, a PID controller, a fuzzy switching controller, a PLC, and a variable-pitch motor. The fuzzy controller is used for performing fuzzy control on an offset value, and transmitting a signal to the fuzzy switching controller; the PID controller is used for operating the offset value, and transmitting the signal to the fuzzy switching controller; the fuzzy switching controller is used for superposing signals output by the fuzzy controller and the PID controller and transmitting the processed signals to the PLC; the PLC is used for receiving the signals processed by the fuzzy switching controller and controlling the variable-pitch motor; and the variable-pitch motor adjusts the pitch angle in real time according to the signals of the PLC. The control system has the advantages that: the control system performs control more accurately and reliably; the requirement on accurate control of the pitch angle can be met; and the control system is suitable for modeling and controlling a wind generating system.

Description

MW class wind turbine group intelligent variable-pitch control system and controlling method
Technical field
The present invention relates to a kind of control system, relate in particular to a kind of MW class wind turbine group intelligent variable-pitch control system and controlling method.
Background technique
The elementary object of MW class wind turbine group feather control is to obtain ceiling capacity and user's acceptable power quality is provided from wind energy, and because the randomness of wind speed and the influence of aerodynamic effect, pitch-variable system has become multivariable strong nonlinearity uncertain system.Conventional pitch-variable system is controlled by PID and is realized its control purpose, this method at first needs to set up effective system mathematic model, but because the complexity of aerodynamic uncertainty and system model, often set up very difficulty of an accurate system model, and for the complicated like this controlled device of pitch-variable system, then be not easy to very much regulate Control Parameter, be difficult to obtain satisfied control effect.
Summary of the invention
The invention provides a kind of MW class wind turbine group intelligent variable-pitch control system and controlling method for solving the problems of the technologies described above, purpose is to adjust propeller pitch angle according to change of wind velocity more accurately.
For reaching above-mentioned purpose MW class wind turbine group of the present invention intelligent variable-pitch control system, be made of following structure: a fuzzy controller is used for deviate is carried out fuzzy control, and signal is delivered to fuzzy switch controller; A PID controller is used for deviate is carried out computing, and signal is delivered to fuzzy switch controller; A fuzzy switch controller, the signal of fuzzy controller and the PID controller output that is used to superpose and will handle after signal pass to PLC; A PLC is used to receive signal that fuzzy switch controller handles and controls becoming the oar motor; A change oar motor is according to the signal real-time regulated propeller pitch angle of PLC.
MW class wind turbine group intelligent variable-pitch control system also comprises a derivative unit, after being used for deviate differentiated, sends fuzzy controller again to; Fuzzy controller carries out fuzzy control according to error amount and error differential value.
The controlling method of MW class wind turbine group intelligent variable-pitch control system is made of following step: when there are deviation in input signal and output signal, deviate is handled, and the result that will handle sends PLC to; PLC handles the back to the signal that sends corresponding control signal is sent to change oar motor, carries out the control and the adjustment of propeller pitch angle, after deviate reaches scheduled target, becomes the oar motor and quits work.
Deviate handled comprise the steps: deviate and enter fuzzy controller jointly to carry out data processing through the deviation differential value of derivative unit, the while deviate enters the PID controller and carries out data processing, the result who the result and the PID controller of fuzzy controller processing is handled by fuzzy switch controller superposes, and the result after the stack is sent to PLC.
Advantageous effect of the present invention: because fuzzy control does not need to set up precise math model, having control mechanism and strategy is easy to accept and understand, simplicity of design, use characteristics easily, therefore the fuzzy intelligent controller that both combine is controlled in fuzzy control and PID, control can be satisfied the accurately requirement of control of propeller pitch angle more accurately and reliably, is very suitable for the modeling and the control of wind-power generating system.
Description of drawings
Fig. 1 is a block diagram of the present invention.
Among the figure: 1, derivative unit; 2, fuzzy controller; 3, PID controller; 4, fuzzy switch controller; 5, PLC; 6, become the oar motor.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
MW class wind turbine group intelligent variable-pitch control system of the present invention as shown in the figure is made of following structure: a fuzzy controller 2 is used for deviate is carried out fuzzy control, and signal is delivered to fuzzy switch controller 4; A PID controller 3 is used for deviate is carried out computing, and signal is delivered to fuzzy switch controller 4; A fuzzy switch controller 4, the signal of be used to superpose fuzzy controller 2 and 3 outputs of PID controller and will handle after signal pass to PLC5; A PLC5 is used to receive signal that fuzzy switch controller 4 handles and controls becoming oar motor 6; A change oar motor 6, according to the signal real-time regulated propeller pitch angle of PLC5, a derivative unit 1 after being used for deviate differentiated, sends fuzzy controller 2 to again; Fuzzy controller 2 carries out fuzzy control according to error amount and error differential value.
The controlling method of MW class wind turbine group intelligent variable-pitch control system is made of following step: when there were deviation in input signal and output signal, e handled to deviate, and the result that will handle sends PLC to; PLC handles the back to the signal that sends corresponding control signal is sent to change oar motor, carries out the control and the adjustment of propeller pitch angle, after deviate e reaches scheduled target, becomes the oar motor and quits work.
Deviate handled comprise the steps: deviate e and enter fuzzy controller 2 jointly to carry out data processing through the deviation differential value ec of derivative unit 1, while deviate e enters PID controller 3 and carries out data processing, by the as a result U of fuzzy switch controller 4 with fuzzy controller 2 processing FuzzyU as a result with 3 processing of PID controller PIDSuperpose, with the result after the stack Be sent to PLC5.
After described change oar motor is adjusted, continue whether having deviate to detect, if deviate is arranged then intelligent controller works on.
The present invention is a kind ofly switched the contactless switching mode of two kinds of control algorithms by fuzzy rule, and the switching of two kinds of control modes is switched according to fixing fuzzy logic formula according to the size of control deviation e, adopts the mode of weighting to superpose.When there was large deviation in pitch-controlled system, fuzzy control played a major role, and shared weight is bigger, guaranteed the rapidity of control and suppressed overshoot; During little deviation, PID control plays a major role, and shared weight is bigger, to eliminate the systematic steady state error.
The present invention is the compound control intelligent control algorithm of fuzzy segmentation based on fuzzy switching of Integrated Fuzzy Control and pid control algorithm advantage, make system have the robustness of better steady state and wind speed disturbance, adjusted propeller pitch angle stably, the assurance variable-pitch control system is accurately followed the tracks of wind speed variation carrying out reliably working.This scheme has not only overcome pid control algorithm and has been difficult to set up the shortcoming of mathematical models, and has satisfied the control target that ceiling capacity obtained, guaranteed reliable operation and good power generating quality is provided.

Claims (4)

1. MW class wind turbine group intelligent variable-pitch control system, it is characterized in that being made of following structure: a fuzzy controller is used for deviate is carried out fuzzy control, and signal is delivered to fuzzy switch controller; A PID controller is used for deviate is carried out computing, and signal is delivered to fuzzy switch controller; A fuzzy switch controller, the signal of fuzzy controller and the PID controller output that is used to superpose and will handle after signal pass to PLC; A PLC is used to receive signal that fuzzy switch controller handles and controls becoming the oar motor; A change oar motor is according to the signal real-time regulated propeller pitch angle of PLC.
2. MW class wind turbine group intelligent variable-pitch control system according to claim 1 is characterized in that also comprising a derivative unit, after being used for deviate differentiated, sends fuzzy controller again to; Fuzzy controller carries out fuzzy control according to error amount and error differential value.
3. the controlling method of MW class wind turbine group intelligent variable-pitch control system according to claim 1, it is characterized in that constituting: when there are deviation in input signal and output signal by following step, deviate is handled, and the result that will handle sends PLC to; PLC handles the back to the signal that sends corresponding control signal is sent to change oar motor, carries out the control and the adjustment of propeller pitch angle, after deviate reaches scheduled target, becomes the oar motor and quits work.
4. the controlling method of MW class wind turbine group intelligent variable-pitch control system according to claim 3, it is characterized in that deviate handled and comprise the steps: deviate and enter fuzzy controller jointly to carry out data processing through the deviation differential value of derivative unit, the while deviate enters the PID controller and carries out data processing, the result who the result and the PID controller of fuzzy controller processing is handled by fuzzy switch controller superposes, and the result after the stack is sent to PLC.
CN201010201478A 2010-06-17 2010-06-17 Intelligent variable-pitch control system and method for megawatt wind generating set Pending CN101865079A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102900605A (en) * 2012-09-19 2013-01-30 河北工业大学 Wind turbine generator set variable pitch controller design method based on finite time stabilization
CN105508135A (en) * 2015-12-14 2016-04-20 沈阳华创风能有限公司 Variable pitch control method based on combination of fuzzy feedforward and fuzzy PID control

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CN1274985A (en) * 2000-06-06 2000-11-29 深圳市华为电气技术有限公司 Digital inverter-controlling method and controller based on fuzzy compensation
CN101498283A (en) * 2008-02-01 2009-08-05 北京能高自动化技术有限公司 Variable pitch control method for large-sized wind-driven generator group
CN101586526A (en) * 2009-04-23 2009-11-25 沈阳瑞祥风能设备有限公司 Fuzzy yawing control system and control method for wind power generating set
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CN201705553U (en) * 2010-06-17 2011-01-12 沈阳瑞祥风能设备有限公司 Intelligent variable propeller pitch control system for megawatt wind generating set

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Publication number Priority date Publication date Assignee Title
CN1274985A (en) * 2000-06-06 2000-11-29 深圳市华为电气技术有限公司 Digital inverter-controlling method and controller based on fuzzy compensation
CN101498283A (en) * 2008-02-01 2009-08-05 北京能高自动化技术有限公司 Variable pitch control method for large-sized wind-driven generator group
CN101586526A (en) * 2009-04-23 2009-11-25 沈阳瑞祥风能设备有限公司 Fuzzy yawing control system and control method for wind power generating set
CN101660489A (en) * 2009-09-23 2010-03-03 南京盛唐电力控制系统有限公司 Megawatt wind generating set combination control policy
CN201705553U (en) * 2010-06-17 2011-01-12 沈阳瑞祥风能设备有限公司 Intelligent variable propeller pitch control system for megawatt wind generating set

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102900605A (en) * 2012-09-19 2013-01-30 河北工业大学 Wind turbine generator set variable pitch controller design method based on finite time stabilization
CN102900605B (en) * 2012-09-19 2014-11-19 河北工业大学 Wind turbine generator set variable pitch controller design method based on finite time stabilization
CN105508135A (en) * 2015-12-14 2016-04-20 沈阳华创风能有限公司 Variable pitch control method based on combination of fuzzy feedforward and fuzzy PID control

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Open date: 20101020