Abstract
Low-voltage direct current (LVDC) microgrid has emerged as a new trend and smart solution for the seamless integration of distributed energy resources (DERs) and energy storage systems (ESS). This paper presents a coordinated controlled power management scheme (PMS) for wind–solar fed LVDC microgrid equipped with an actively configured hybrid energy storage system (HESS). The comprehensive design, development, implementation and thorough result analysis is presented to validate the proposed PMS performance. It dynamically adapts to different operating modes based on the availability of DERs and load demand. By incorporating the HESS, the scheme effectively handles sudden and gradual power surges, leading to swift regulation of the DC bus voltage, effective power balance and reduced stress on the battery. A laboratory test bench is developed comprising a wind power generating unit (WPGU), solar power generating unit (SPGU), battery energy storage system (BESS), and supercapacitor energy storage system (SCESS). Moreover, the detailed design and testing of various converters, gate drivers, filters, signal conditioning along with calibration of sensors are discussed. The developed PMS is executed using a DS1103 digital controller confirming its effectiveness in facilitating smooth mode transition and proper power sharing among all DERs and loads.
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