Supervisory Power Management Scheme of a Laboratory Scale Wind-PV Based LVDC Microgrid Integrated With Hybrid Energy Storage System

This paper demonstrates a unified and dynamic power management scheme designed for a wind-photovoltaic (PV) powered low-voltage direct current (LVDC) microgrid equipped with an actively configured hybrid energy storage system (HESS). The intermittent nature of renewable energy resources (RERs) and the unpredictable variations in load demand necessitates the integration of both high-power and high-energy density storage systems in a microgrid. The proposed supervisory power management scheme (SPMS) dynamically adapts to different operating modes of the LVDC microgrid based on the availability of RER power and load demand. By incorporating the battery, supercapacitor (SC) based HESS, the scheme effectively handles sudden and gradual power surges, leading to swift regulation of the DC bus voltage, effective power balance, and reduced current stress on the battery. The developed autonomous LVDC system with the suggested power management scheme is experimentally validated with different case studies. The comparative experimental result analysis substantiates the efficacy of the SPMS along with a seamless transition between various modes.