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Participation of Battery Energy Storage Systems in the Italian Balancing Market: Management Strategies and Economic Results

pubblicazioni - Memoria

Participation of Battery Energy Storage Systems in the Italian Balancing Market: Management Strategies and Economic Results

Per un Sistema di Accumulo (SdA) basato su batterie, in configurazione “stand-alone”, si formula una prima strategia di offerta per il servizio di bilanciamento sul Mercato di Bilanciamento (MB) italiano. La strategia si basa sui prezzi medi orari (su base giornaliera o stagionale) dell’ultimo anno realizzatisi su MB. Sempre a partire dai dati storici, si stimano il ritorno economico dallo svolgimento del servizio (considerando anche le penalità per mancato servizio) e la possibile vita utile della batteria a fronte dei cicli di carica/scarica effettuati.

The possible supply of balancing services by a Battery Energy Storage System (BESS) in the Italian Balancing Market (BM) is considered. A strategy to formulate (downward) bids and (upward) offers is proposed, based on the BM session timetable and on trying to sell the stored energy until the energy left becomes too small; purchase bids are then made to try to recharge the battery. Adopted bid and offer prices are averages of the historical accepted prices (available for each quarter of an hour) and are assumed to be accepted or not based on their comparison to such prices.

One year of energy exchanges for the services is simulated and the related costs and revenues are computed. A sensitivity analysis is carried out by varying the adopted average prices by a fixed percentage. The bidding strategy appears to be promising, but there is room for improvement to reduce the BESS investment payback period and/or to increase the battery expected life against the charge-discharge cycles.

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