DNV GL - Strategic Research & Innovation: Position Paper
This paper explores the need for, and viability of, seasonal storage in the power system. Seasonal storage is a form of storage typically accommodating yearly cycles in electricity demand and VRES generation. It stores energy during one seasonal condition (summer or winter) and discharges the stored energy in the other seasonal condition, depending on the load demand. Seasonal storage is, therefore, closely related to seasonal variations in temperature, wind speed and solar irradiation as these mainly determine the need for heat- and cooling demand and the generation of solar and wind power. A case study is used to specifically assess the business case for seasonal storage.