A comparative study for reactive power capability of doubly fed induction generator and synchronous generator

Abstract

Recent grid code particularly established for high penetration of renewable power generation in the power system demand the network support similar to conventional generator in steady state and dynamic operations. voltage instability is one of the major concerns with huge amount of wind power penetration in the existing power system which is due to insufficient amount of reactive power. Modern wind generator is used in variable speed applications equipped with power electronics converters have capability to deliver/ consumer reactive power similar to conventional generator. In present work, reactive power capability possessed by doubly fed induction generator equipped wind turbine has been analyzed by considering various constraints and compared with the reactive capability of synchronous generator.