Direction of System Balancing (DSB)
DSB is a +1 / 0 / −1 indicator the TSO publishes for each Market Time Unit, signalling whether the Baltic Coordinated Balance Area was in aggregate surplus, balanced, or in aggregate shortage during that interval. Per Elering convention, +1 means BRPs were net long and the TSO downregulated; −1 means BRPs were net short and the TSO upregulated. The sign decides which marginal reference price applies under EBGL Article 55 single pricing and on which side the monthly neutrality component is added.
The Direction of System Balancing (DSB) is a +1 / 0 / −1 indicator the TSO publishes for each Market Time Unit (MTU), signalling whether the Baltic Coordinated Balance Area was in aggregate surplus, balanced or in aggregate deficit during that interval. The sign decides which marginal reference price applies under EBGL Article 55 single pricing and on which side the neutrality component is added.
What the values mean (Baltic convention)
Per the Elering electricity-market handbook: +1 (positive direction) means BRPs were in aggregate surplus during the MTU — the system was net long and the TSO activated downward balancing energy. −1 (negative direction) means BRPs were in aggregate shortage — the system was net short and the TSO activated upward balancing energy. 0 means no net balancing-energy activation in either direction. In practice, 0 is rare.
How DSB sets the imbalance reference price
Imbalance settlement uses single pricing: every BRP imbalance in a given MTU clears at one and the same reference price, regardless of whether the BRP was long or short. When DSB is positive, the reference is the area-based downward marginal price minus the monthly neutrality component. When DSB is negative, the reference is the area-based upward marginal price plus the monthly neutrality component. The asymmetry is the structural reason up- vs down-regulation price spreads translate directly into BRP P&L on each settled MTU.
How DSB is determined
At the end of each MTU, the TSO observes the net activated balancing energy across the Baltic Coordinated Balance Area — mFRR through MARI, aFRR through PICASSO, plus volumes netted by the IGCC imbalance-netting process. If no balancing energy was activated, the DSB falls back to the sign of the aggregated BRP imbalance. EBGL Article 55 anchors the single-pricing principle that ties imbalance settlement to the dominant direction.
Where you see this in Baltic data
The Baltic Transparency Dashboard publishes a dedicated DSB report per Baltic country, with the indicator value for each MTU together with the applicable reference price. BRPs reconcile their settled imbalance price against this series; deviations are typically due to neutrality-component updates that lag the underlying activations. See the Estonian imbalance price live.
Sources
EBGL Articles 54–55 (imbalance pricing) · Elering: Elektrituru käsiraamat (Baltic balancing chapter) · BTD: DSB report · Elering: Balancing service
Frequently asked
- What does Direction of System Balancing mean?
- DSB is the +1 / 0 / −1 sign for each Market Time Unit signalling the aggregate state of the Baltic Coordinated Balance Area. Per the Elering electricity-market handbook, +1 means BRPs were predominantly in surplus and the TSO downregulated; −1 means BRPs were predominantly in shortage and the TSO upregulated; 0 means no net activation in either direction.
- How does DSB affect the imbalance price a BRP pays?
- Imbalance settlement uses single pricing, so every BRP imbalance in a given MTU clears at the same reference price. When DSB is +1 the reference is the area-based downward marginal price minus the monthly neutrality component; when DSB is −1 it is the upward marginal price plus the neutrality component. Short BRPs in a −1 MTU therefore pay a high settled price; long BRPs in the same MTU receive a refund at that same high price.
- How is DSB determined for each Market Time Unit?
- At the end of each MTU the TSO observes the net activated balancing energy across mFRR (via MARI), aFRR (via PICASSO) and IGCC-netted volumes for the Baltic Coordinated Balance Area. The sign of the dominant directional volume becomes DSB. If no balancing energy was activated, DSB falls back to the sign of the aggregated BRP imbalance. EBGL Article 55 anchors this single-pricing principle.
- Where can I see DSB data for Estonia?
- The Baltic Transparency Dashboard publishes a dedicated DSB report per Baltic country, with the indicator value for each 15-minute MTU together with the applicable reference price. The series is the canonical record for imbalance reconciliation; the legacy hourly series in the BTD Archive uses the same sign convention.