Research on a Method for Suppressing Sub/Super-Synchronous Oscillation Based on Energy Storage
A doubly-fed induction generator(DFIG),also known as a doubly-fed wind generator,has been widely used in wind farms due to its advantages of variable speed and constant frequency.With the integration of a large amount of wind energy,the use of series compensation capacitor technology for long-distance high-voltage trans-mission is prone to causing subsynchronous oscillation(SSO)in the grid.The stator winding of the DFIG is directly connected to the grid,so it is highly susceptible to the influence of the SSO of the grid during operation.This paper studies the SSO of the DFIG and its suppression strategies,and proposes a method of using energy storage devices added by the damping control link to reshape the impedance of wind farms and suppress sub/super-synchronous os-cillation.The performance of this scheme has been verified through electromagnetic transient simulation,which can successfully suppress the sub-synchronous currents of different frequencies,so as to improve the stability of the tar-get system.
Doubly-fed induction generatorSub/super-synchronous oscillationTime-domain simulationAddi-tional damping control
万方数据
维普
