wiredInUSA January 2019

Connection contract

Power to the islands

Image: Boskalis

Nexans has secured a €111 million turnkey project fromADMIE, an independent power transmission operator, for the Cyclades Islands Interconnection in Greece. The project is aimed at providing a reliable and sufficient supply of electricity to the Syros, Paros, Tinos, Mykonos and Naxos islands. The interconnector will be laid between the city of Lavrion, on the Greek mainland, and the island of Syros. By interconnecting the Cyclades Islands, ADMIE plans to reduce the number of the existing power stations that operate on heavy fuel oil and light fuel oil (diesel) and set up the necessary infrastructure to tap the significant renewable power potential in the region. Nexans’ contract includes seabed survey, design, manufacturing, installation and protection of a 150kV high-voltage alternating current three-core submarine power cable with an internal fiber optical element. Delivery and commissioning of the interconnection are scheduled to take place in August 2020.

50Hertz has awarded a contract to the consortium of Danish cable manufacturer NKT and Dutch installation company Boskalis, for the manufacture and installation of three 220kV alternating current cables for the Ostwind 2 project. The 220kV HVAC cables will connect two wind farms in the Baltic Sea - Arcadis Ost 1 and Baltic Eagle - to the German extra-high voltage grid. The order is said to be worth approximately €550 million. The cable systems, identified as OST-2-1, OST-2-2 and OST-2-3, were confirmed by the Federal Network Agency (BNetzA) in accordance with the 2030 offshore grid development plan (2017 version). The cables have a total length of about 270km. Offshore, these are divided into three cable bundles with lengths between 97km and 85km. Onshore, all cables have the same standard length of 3km. The three 220kV HVAC cables can transfer a total capacity of 750MW. The cables used are synthetic insulated three-core copper cables with a conductor cross-section of 1,200mm². The cable insulation consists of cross-linked polyethylene, and thewatertight submarine cables are reinforced with steel to protect them from mechanical damage.

wiredInUSA - January 2019

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