Community electricity and storage central management for multi-dwelling developments: an analysis of operating options

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Elizabeth Tomc
Anthony M Vassallo

Abstract

A combination of PV, storage and energy management in multi-dwelling developments can be very effective in utilising load diversity and reducing grid dependence.  Sharing PV and electricity storage resources within a community renewable energy network (CREN) via an energy management system (EMS) shifts the peak individual loads to times that the grid considers off-peak periods - i.e. night time – so managed off-peak charging and a retail plan with the lowest off-peak pricing affords the community savings in the order of 95.5% compared to the traditional individual grid connection.  The balancing performed by the EMS eliminates the paradox of concomitant demand and supply from/to grid that occurs when some of the individual systems in the community have available charge while others don’t.  The optimisation of off-peak charging avoids 54% of redundant charge which is a financial gain in jurisdictions where feed-in tariffs are much lower than supply charges.  Even though this study focuses on an Australian case study it provides a tool that allows the performance of the same analysis for other specific sites and load profiles.

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