Impact of Reference Value of Wind Turbine Active Power to the Distribution of Doubly-Fed Induction Generator Power

摘要

The renewable power sources are today rapidly researched objects. Wind energy is one of possible renewable sources. The wind turbine with doubly-fed induction generator (DFIG) is very important part of the modern wind turbines. This paper presents a control system of the DFIG wind turbine with focus on the control strategies and on active power reference value choice. Active power reference value essentially determines distribution of stator and rotor active power. The present control method is designed for super-synchronous, sub-synchronous and synchronous working modes. In order to investigate the dynamic responses during step load of DFIG connected to the electric grid a model has been developed. This model includes the mechanical drive train, the induction generator as well as the control parts.