Control of reactive power in double-fed machine based wind park

Different aspects of reactive power regulation problem in wind farms are presented in this paper. In the first part some background of the reactive power control in wind parks is presented, including motivations for its use and methods that can be used. In general, there are active (wind generator, compensator) and passive methods (L,C) of reactive power compensation. A simulation model of the wind park (model of doubly fed induction generator (DFIG) based wind turbines, transformers, cable lines between wind farm and PCC, control system). has been done to verify the efficacy of proposed methods. Conclusions about need and possibilities of reactive power control have been drawn From simulations in steady and transient state. Next features with special regards to limits of the DFIG working as wind generator are presented. In the final part of the paper selected methods of reactive power control are described and simulation results are presented.