An Efficient Fog as-a-Power-Economy-Sharing Service

Cheap energy from the utility can be stored during off-peak time in batteries and utilized during on-peak time. However, energy storage more than future demand can degrade the system. The sharing of surplus stored energy within the community can reduce the energy consumption cost. A system of fetching surplus energy from storage systems of smart homes is indispensable to share within the community. In this paper, Fog-as-a-Power-Economy-Sharing service is proposed, which interconnects the distributed batteries based power and forms the unified energy storage system for a community. In a community, capacities of batteries storage, investment and power demand of every smart home are different. However, participants of the service share their battery based stored energy for social welfare following the no-profit-no-loss rule to form a unified energy storage system. When energy exhausted smart homes request for energy, the fog decides either power is supplied from the unified energy storage system or from the utility to reduce global energy cost for the community. In the paper, global cost (energy cost and cost of fogs' services) for twelve communities is analyzed, which is payable by smart homes in the communities. The results validate the significance of the proposed time efficient Fog-as-a-Power-Economy-Sharing service, which reduces global power cost and computing cost for each community.