Detailed modeling of wind power plants incorporating variable-speed Synchronous Generator

Abstract

The modeling of wind power plants incorporating synchronous generator and full-converters for using in power system simulations is presented in this paper. In other words, all components of the above-mentioned power plant using typical values as well as their corresponding control systems are in details modeled and also simulated. The control strategy of the variable-speed wind turbine is the maximum power point tracking strategy which guarantees gathering the maximum possible wind energy under normal operation of power plant. In order to model Synchronous Generator (SG), the space-phasor coordinates with orthogonal direct (d) and quadrature (q) axes are used. The generator is controlled using two back-to-back converters with current vector control method. Having these full-controlled converters and pitch control system, the electric grid requirements can be satisfied by controlling active and reactive power at the point of common coupling. Unlike old wind power plants, this ability aids the power system to be more stable. Finally, simulation results are compared with data measured at a 20-MW wind park with the same topology in Germany. The proper coincidence between simulations and measured data proves the validity of the proposed model to be used in power system simulations, especially transient simulations.