The large-scale integration of the distributed generation makes sub/super-synchronous oscillation more and moreprominent

and its suppression strategies need to be studied urgently.However

the current suppression strategies have manyshortcomings in economy and real-time.To solve the above problems

an inhibition scheme based on second order generalizedintegrator(SOGI)is proposed in this paper. Firstly

the equivalent impedance model of the distributed generation isconstructed

and the deficiencies of quasi-proportional-resonant controller(QPR)in oscillation suppression are analyzed.Secondly

in view of the uncertain oscillation frequency and its time-varying characteristics

the second-order generalizedintegrator-frequency locked loop(SOGI-FLL)based oscillation signal monitoring link with the oscillation suppression strategybased SOGI is combined in this paper

so as to realize the rapid and effective suppression of the oscillation signal from thesource while extracting its features.Finally

an experimental platform is set up to compare the inhibition effect of the proposedstrategy with that of the QPR strategy

which proves the real-time performance and superiority of this strategy.