Hybrid Dc/ac Zonal Microgrid Enabled By Solid–state Transformer And Centralized Esd Integration

Hybrid DC/AC Zonal Microgrid Enabled by Solid State Transformer and Centralized ESD Integration.

Abstract:

This paper proposes control strategies for localized control of zonal hybrid microgrid, enabled by the (Solid State Transformer)SST and centralized energy storage devices (ESD) integrated using Dual-active bridge (DAB) converter. The control of DAB DC–DC converter is modified for zero circulating power flow (ZCPF) operation in both SST and ESD. Power management and co-ordination control used in this paper ensures the power supply reliability of the zonal Hybrid DC/AC Microgrid (HMG) integrated through the SST. Microgrid system along with its proposed controllers provides a stabilized low voltage DC and AC network ports, in both grid feeding and forming modes. The performance of the configured HMG system is evaluated under various power management scenarios using the MATLAB software platform.