Contribution of variable-speed wind farms to damping of power system oscillations

This paper shows a variable speed windmill control system intended to damp inter-area power system oscillations. The proposed control is evaluated performing several simulations on a modified version of the 39 buses New England power system, which includes several wind farms. The simulations represent a three-phase shortcircuit, and the damping control system is applied with different gains. Inter-area oscillations and wind energy production graphics are shown and discussed. A modal analysis is performed on the inter-area active power flow in order to evaluate numerically the effect of the control system.