Power conditioning system of Flywheel Energy Storage

Abstract

AbstractIn a Flywheel Energy Storage system (FESS), thepower conditioning system is the key component ofcontrolling power transfer between the Flywheel and thepower system. The dynamics of the power conditioningsystem directly affect the effect of FESS in dynamicregulation of power system. In this paper, powerconditioning system which is made up of a doubly-fedinduction machine (DFIM) connected with flywheel, a backto-back converter for AC excitation and an excitation vectorcontrol system is studied. The excitation control strategy ispresented for FESS DFIM to improve transient stability andincrease transfer capability of power systems. The proposedcontrol method has good dynamics that can respond to thesystem power demand quickly and accurately. Moreover,the proposed control method has good robust characteristicand applicability to improve the performance of powerconditioning system. Simulation and experiment results areperformed to evaluate the performance of the proposedcontrol method6 Halama