June 23, 2021 — The two-turbine pilot program of Dominion Energy’s Coastal Virginia Offshore Wind venture has yielded better results than expected.
The pilot is Dominion’s precursor for plans to install 180 wind turbines in a leased block on the Atlantic’s continental shelf roughly 27 miles off Virginia Beach, at a cost currently projected at $8 billion. In doing so, Dominion is following a General Assembly directive to eliminate greenhouse gas emissions by 2045.
Running since October, the two 600-foot tall pilot turbines, each driven by three 253-foot-long blades, are giving Dominion’s engineers a real-world education in the potential for Virginia coastal wind power. The turbines’ efficiency over winter and spring is beating the forecasts, and their downtime for maintenance is less than expected (about two percent). Automated controllers that turn their mounts to “aim” them and adjust the blade angles to “harvest” the wind have proven more effective than human operators.
Still to be determined, though, is how well they perform in the summer months when winds drop below the 5–8 knots needed to start the blades. Scientific field studies are showing fish using the area and minimal interactions with birds, according to cameras on the towers.
The news may be encouraging, but the project still faces many challenges. The immediate one is the environmental impact statement needed for the full 180-turbine wind farm. Dominion plans to have a draft out for public comment next year and a final version in the fall of 2023.