Gate closure time
Gate closure time is the deadline by which a market participant must submit (or modify) its bid for a given market run. Different markets have different gate closures: day-ahead clears at noon for next-day delivery; intraday keeps an order book open until close to physical delivery; MARI and PICASSO have separate gate closures per Market Time Unit (25 minutes pre-MTU for mFRR Scheduled Activation per EBGL Article 24); BBCM has its own daily gate closure for next-day reserve procurement. Bids changed after gate closure show up in BTD as "unavailable bid volumes".
Gate closure time is the deadline by which a market participant must submit (or modify) its bid for a given market run. Different markets have different gate closures: the day-ahead market closes at noon for next-day delivery; the intraday market keeps an order book open until close to physical delivery (typically 30–60 minutes pre-delivery); MARI and PICASSO have separate gate closures per Market Time Unit; and the Baltic Balancing Capacity Market has its own daily gate closure for next-day reserve procurement.
Why gate closure exists
Every market run needs a stable input set to clear deterministically. After gate closure the TSO (or NEMO) freezes the bid set and runs the optimisation — pay-as-cleared marginal pricing for day-ahead, capacity merit order for BBCM, activation merit order for MARI/PICASSO. Bids submitted late are rejected. The gate-closure time is the practical operational constraint that decides which forecast a BSP / BRP must commit to.
Estonia: balancing-energy gate closure
For mFRR balancing energy through MARI, the standard-product gate closure is set under EBGL Article 24: bids are firm by 25 minutes before the start of the activation MTU for Scheduled Activation, and 7.5 minutes for Direct Activation. Per Eleringi reserviturgude Q&A (20.05.2025), Estonian BSPs submit bids continuously until those windows close. Capacity bids on BBCM have a daily gate closure in the morning before the next delivery day. The legacy "balancing-bid submission gate closure time" referenced in BTD's "Unavailable bid volumes" reports is this same threshold — bids removed or adjusted after gate closure show up as "unavailable".
Where you see this in Baltic data
BTD's "Unavailable mFRR bid volumes" and "Unavailable aFRR bid volumes" reports track adjustments BSPs made before or after the balancing-bid submission gate closure. A consistent stream of unavailable bids near gate closure can be a signal of operational stress on a BSP's portfolio. For real-time mFRR clearing prices that come out of post-gate-closure activation, see the mFRR clearing-price chart.
Sources
EBGL Article 24 (gate closure for balancing-capacity bids); Article 25 (standard products / bid validity) · ENTSO-E: Electricity Balancing · Elering: Balancing service terms & conditions
Frequently asked
- What is gate closure time in electricity markets?
- Gate closure is the deadline by which a market participant must submit or modify its bid before the market run executes. After gate closure the bid set is frozen and the optimisation runs deterministically. Bids submitted late are rejected; bids withdrawn or changed after gate closure are reported as "unavailable bid volumes" in BTD.
- When is the gate closure for mFRR balancing energy in Estonia?
- For mFRR balancing energy through MARI, EBGL Article 24 sets the standard-product gate closure at 25 minutes before the start of the activation Market Time Unit for Scheduled Activation, and 7.5 minutes for Direct Activation. Per Eleringi reserviturgude Q&A (20.05.2025), Estonian BSPs can submit and modify bids continuously until those windows close.
- How many gate closures does an Estonian BSP face?
- Several. Daily: BBCM capacity-bid gate closure in the morning for next-day reserve procurement. Per MTU: MARI mFRR gate closure (25 min for SA, 7.5 min for DA) and PICASSO aFRR continuous setpoint update. For wholesale-trading-side BRPs: SDAC noon close for day-ahead, SIDC continuous (closing 30–60 min pre-delivery) for intraday.
- What does "Unavailable bid volumes" in BTD mean?
- BTD's "Unavailable mFRR bid volumes" and "Unavailable aFRR bid volumes" reports track adjustments that BSPs made before or after the balancing-bid submission gate closure. A consistent stream of unavailable bids near gate closure can be a signal of operational stress on a BSP's portfolio — the BSP committed to a bid and then had to walk it back as conditions changed.