Interconnector

An interconnector is a transmission line that lets electricity flow between two grid areas, whether two countries, two US balancing authorities, or two European bidding zones. It lets an area import power when short and export it when in surplus, and its rated capacity limits how much can move even when prices or need would otherwise call for more. Physical flow follows the line and grid conditions, not a market wish; a price gap between two zones that fails to close usually means the link between them is full.