Offshore Wind Interconnection Study

The study determined the feasibility of designing, constructing, operating, and maintaining submarine cable-based interconnection facilities for the Dominion Virginia Power system at stations that are up to 15 km (9 miles) inshore from the coast. The proposed solution was to divide the wind farm area--total size is approximately 700 sq. km.--into four zones with a central substation platform in each zone. Each platform would have eighteen 34.5-kV feeders connected to it. Two 230-kV export cable circuits would connect each substation platform to the onshore Dominion power system. The total estimate for one 648 MW platform and 230-kV cable installation is $652 million.