Pragmatic control strategy design method for a small windgenerator

Abstract

The paper establishes a preliminary pragmatic method to obtain the control strategy of an innovative small windgenerator prototype. There is presented the proposed structure of the considered wind energy conversion system, respectively its components and subsystems. There were considered the wind turbine, the generator, the electronic converters, the brake systems and their characteristics, being obtained theoretically or experimentally at components' construction works and at a dedicated laboratory model. Based on the components' characteristics and their operation restrictions, as well as on the wind speed variation intervals, there were established: start and stop conditions, the control law for the optimal wind turbine operation, wind speed variation domain and the corresponding control law from optimal operation regime to the rated one, the control methods and laws for great wind speeds, brake methods for different failure wind generator regimes.