Calculation of Appropriate Subsidies for Energy Storage System to Improve Power Self-sufficiency Consider Microgrid Operation

Abstract

-In recent years, renewable energy sources have been mentioned as solution to environmental regulation and energy supply-demand. Energy storage systems are needed to mitigate the intermittent output characteristics of renewable energy sources and to operate micro grid efficiently using renewable energy generation systems. However, despite the necessity of energy storage system, this cannot secure the economical efficiency of the energy storage system by high initial cost. In this paper, a micro grid is constructed to supply electric power to industrial customers by using solar power generation system and energy storage system among renewable energy generation power sources and operated to improve energy independence. In the case study, we use photovoltaic system which is representative renewable energy generation system. Unlike conventional photovoltaic system, this system uses floating photovoltaic system with the advantage of having high output and no land area limitations. It is operated for the purpose of improving energy independence in the micro grid. In order to secure economical efficiency, the energy storage system operates a micro grid with a minimum capacity. Finally, this paper calculates the appropriate subsidy for the energy storage capacity.

Study on energy efficiency improvement strategy of photovoltaic-hybrid energy storage DC microgrid considering green energy saving concepts

“…For policymakers, effective financial incentives and technical standards are needed to promote the development of PV DC microgrids [10], and future research should focus on how to further reduce the cost of the technology and improve the reliability and ubiquity of the system [11]. The maturity of the technology, its cost-effectiveness, as well as the market and social acceptance, are the main challenges faced by PV DC microgrids today [12].…”