A 4 GW AC submarine Turkish power grid reinforcement under the Dardanelles Strait

Abstract

The paper describes the 400 kV AC submarine link under the Dardanelles Strait composed of 12 submarine armoured single-core XLPE-insulated cables (plus a back-up power cable). The link consists of two parallel-operated double-circuit link named Lâpseki-Sütlüce I and Lâpseki-Sütlüce II. The whole transmissible power is 4000 MW (1000 MW per circuit) and the average length for a single-core cable is about 4,6 km: the submarine cables are part of overhead lines. The paper gives a wide overview of the cable installations and chiefly of the cable protections on the seabed: different protection choices have been extensively used (i.e. water jetting and mattressing)