Use of Energy Storage for Levelling Wind Generation – a Parametric Approach Concerning the Capacity of the Storage

Present paper examines the connection of wind generation and energy storage. Since 2007, all generator unit in Hungary has to present a schedule on its forecasted production in 15-minutes detail. If the production exceeds certain area (currently ±50%) of the schedule, a penalty-tariff is to be paid for the ISO. The forecasting methods available of present sometimes not precise enough, thus to avoid this penalty-tariff, use of energy storage may be a possible solution. A computer simulation tool was prepared formerly to calculate the difference in production and schedule, the income, and penalty-tariffs. Results have shown that optimal size of storage capacity mainly depends on the power of the generator and the penalty tariffs. It has also been investigated what prices the system operator can enforce to encourage producers to use a storage unit. Another aim of the paper is to investigate whether certain site-specific wind parameters can correlate with the size of the needed storage. The goal is to find cornerstones for sizing for different storage methods.