Electrical braking of large wind turbines

This paper analyses the electrodynamic braking (EDB) performance of a grid connected wind energy conversion system, during a grid loss. A dual pole induction generator driven by a fixed speed wind turbine is considered for the present study. The modeling of the wind turbine-induction generator unit, with the excitation capacitor C and braking resistor R, at the generator terminals is presented. Through simulation, the steady state as well as the dynamic performance of the system is studied for different R–C combinations. The experimental results on a 1.5 kW induction machine confirm the feasibility and effectiveness of the EDB.