Energy
Why electricity prices split between zones
When a power line or corridor is full, zones on either side get different prices. The auction reports which constraints were full and what one more megawatt of room would have been worth; together they add up to the price gap between any two zones.
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Source: JAO publication tool (Nordic and Core flow-based market coupling). Baltic links to Finland and Sweden are outside the Nordic flow-based domain and show as unexplained.