System Testing

Independent Power Transmission Operator (IPTO), through its subsidiary Ariadne Interconnection, reported on 26 August 2025 that the Crete–Attica electrical interconnection had completed a three‑month testing phase. During this period, the 1,000 MW HVDC subsea link between the Attica region on the Greek mainland and the Heraklion area in Crete was operated under real conditions to verify system performance. The tests confirmed the interconnector’s capability for bidirectional energy flow, demonstrating that power can reliably be transmitted both to and from Crete. Following successful completion of this testing and commissioning phase, the link moved into continuous operation ahead of formal commercial operation.