ANCILLARY SERVICES MARKET

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The Ancillary Services Market is the venue where Terna S.p.A. procures the resources that it requires for managing, operating, monitoring and controlling the power system (relief of intra-zonal congestions, creation of energy reserve, real-time balancing). In the Ancillary Services Market, Terna acts as a central counterparty and accepted offers/bids are valued at the offered price (pay-as-bid).
The Ancillary Services Market consists of a scheduling stage (ex-ante Ancillary Services Market) and of the Balancing Market (BM). The BM takes place in multiple sessions, as provided in the dispatching rules.
The ex-ante Ancillary Services Market takes place in a single session on the day before the day of delivery. The sitting for offer/bid submissions into the ex-ante ASM opens at 3:30 p.m. on the day before the day of delivery and closes at 5:00 p.m. on the day before the day of delivery. The results of the ex-ante ASM are made known by 9:00 p.m. on the day before the day of delivery. In the ex-ante Ancillary Services Market, Terna accepts energy demand bids and supply offers in order to procure reserve, relieve congestions and balance energy injections and withdrawals into/from the grid.
© 2009 ASSONEBB