Introducing A New Isolated Resonant Bidirectional Converter for Connecting Flywheel Storage Systems to the dc Grids

Authors

Faculty of Electrical and Computer Engineering, University of Shahid Beheshti, Tehran, Iran

Abstract

Different storage systems have developed as the key solution for the growing demand of electric power. To this aim, the flywheel storage systems are gaining a wide acceptance for their higher power density and fast dynamic response. In this paper, a novel power electronic topology is proposed for connecting the flywheel storage systems to the distribution systems. This topology provides high dc-link voltage for the power electronic circuit required for driving BLDC motors in flywheel. Consequently, larger power can be stored in flywheel storage system. Since, it is desired to fully exploit the stored energy in flywheel systems, the proposed topology have ZVS feature, which leads to increase of power conversion efficiency. Moreover, the proposed topology is a bidirectional converter for charging and discharging purposes.Also, when the converter is in discharging mode its output voltage remains constant with changes of load. The small signal and fundamental frequency analysis is performed to model the proposed converter. The converter is simulated in Matlab environment to validate its convincing performance.

Keywords


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