Historically, Nakhchivan has operated separately from Azerbaijan’s main electricity system, relying on external connections for system balancing and frequency regulation. How does the Zangezur power line support Azerbaijan’s expansion toward European electricity markets? The integration of Nakhchivan into Azerbaijan’s unified electricity system and the construction of the Zangezur power line also complement Azerbaijan’s participation in the Black Sea Energy Corridor, which brings together Azerbaijan, Georgia, Romania, and Hungary. Taken together, the Zangezur power line and associated infrastructure projects point to a shift toward deeper internal grid integration and expanded regional interconnection. By linking Nakhchivan to the national power system and supporting multiple export directions toward European markets, Azerbaijan is addressing long-standing structural constraints in its energy system.