Energy Storage Valuation toward 100% Renewable Electricity from Reliability Perspective

Resource adequacy ensures reliable operation of energy grid. The analysis focuses on how each resource can contribute firm capacity value to the system. With renewable energy sources where the energy produced are highly variable and uncertain, such capacity value needs to be determined. Various power utilities around the world utilize a concept of Effective Load Carrying Capacity (ELCC) to estimate capacity value of renewable energy sources. This paper proposes a simplified deterministic approach to quantify benefits of energy storage to improve capacity value with high penetration of renewable energy sources.