Power management and operational planning of multiport HPCS for residential applications

Abstract

Renewable energy integration to the power grid has seen a tremendous rise in last few years. A novel hybrid AC and DC bus layout (i.e. medium-voltage DC bus of 380 V and low-voltage DC bus of 48 or 12 V DC) for the residential consumer premises has been proposed in this study. This would enable the consumer to directly connect DC loads to the system, without the need of an individual power conversion device. This study summarises the strategical operational modes of the proposed hybrid power conditioning system (HPCS) for multiple distributed energy resources (DER) integrated residential premises located within urban/rural area. Modified HPCS converter control strategy has been proposed, such that the system operation is efficient and self-adaptive in both, grid forming (or, islanded) and feeding (or, grid connected) modes. System is configured by using a single power conditioning unit, capable of performing wide range of operations, such as, multiple DER interface, battery power management, grid power control and accessibility to AC and DC household loads at the desired voltage levels. Performance of the designed system has been tested via simulation and experimental studies.