Variable Pitch Wind Turbine Synchronization Error On Active Control Method

In this paper, an independent wind turbine pitch control in synchronization error as themain object of study, mainly for wind turbine blades with quality continuously extended runin the harsh environment of the blade pitch arising out of sync issues in-depth research, tostudy the issue enables control of wind turbines on the response speed of the blade to improveon. Synchronization rate increase, can be reduced blade, tower, turbine wheels and the load onthe shaft, to improve the life of the wind turbine, reducing fan noise generated by thevibration. This paper established the first wind turbine model selected for the control methodof the above problems, the design of the controller, and finally, the conventional PI control issimulated comparison. Te xt modeling process to avoid the traditio nal methods ofmathe matical modeling mathe matical derivation o f the problem exists, the use ofmulti-domain physical modeling method to establish the physical model of a wind turbine, butalso established a wind turbine load calculation model that is FAST model FAST process ofestablishing the parameters of the model of choice is the key issue, the paper illustrates thispart of the process parameter selection, the above problems have selected the model referenceadaptive control method and design a synchronization error controller structure, in theorydetermine its effectiveness. In the model reference adaptive controller design selectionprocess is derived based on the "Lyapunov" stability theory of control rate, theoreticallyproved that the stability of the control rate, and use a simple model for the control ratevalidation, verification results can be seen in the reliability of the control rate, following Seoul,with the design of the synchronization error controller structure is established based on the"Lyapunov" stability theory of model reference adaptive controller, This controller is appliedto the above two models, physical models in wind turbine simulation under the control of thewind turbine power generation process validation, and with the traditional PI method werecompared, in FAST simulation model of the controller under Wind turbine wind speed of thewind shear blade tower loads, the generator shaft load, the size of the blade root load, and with the load under conventional PI control were compared. Simulation results indicate thatthe design of wind turbine controller synchronization error suppression has played aneffective role during the operation of the wind turbine are made without too much impact onthe power, voltage issued consistent with the basic and traditional control methods, however,is greatly decrease the fan blades, tower, generator shaft load, more superior than thetraditional controller. But the first simulation process starts when the fan is switched off afterthe second pitch system appeared jitter, which may be due to changes in wind speed causesexcessive, can be added to the low-pass filter out high frequency pitch angle given signal. Inthe simulation also found that newly designed controller response speed is not ideal, theauthors believe that the controller can paddle with the traditional method of combining PI, byincreasing the proportion of part of the proportional system, to improve the response speed ofthe controller. Through the study of this subject indicates that the controller can be applied toreduce the independent variable pitch wind turbine synchronization error, in engineeringpractice the above simulation results can be used as engineering reference, in the actual designof the controller can be added to the filter reducing the pitch angle output jitter. Forengineering practice has certain guiding significance.