Rotor angle stability with high penetrations of wind generation

This paper explores the relationship between wind generation, particularly the control of reactive power from variable speed wind turbine generators, and the rotor angle stability of the conventional synchronous generators in the system. Rotor angle stability is a dynamic phenomenon generally associated with changes in active power flows that create angular separation
between synchronous units in the system. With larger penetrations of wind generation being introduced into power systems, there will be large flows of active power from asynchronous generation in the system. These asynchronous active power flows can aid in maintaining the rotor angle stability of the system. However, the manner in which wind generation injects reactive power into the system can be critical in maintaining angular
stability of the synchronous units. Utilizing wind generation to control voltage and reactive power in the system can ease the
reactive power burden on synchronous generators, and minimize angular separation in the system following a contingency event
and can provide a significant level of support which will become increasingly important in future power systems.