Renewables developer Exus Renewables North America is giving a $200 million upgrade to Somerset County, Pennsylvania’s 139 megawatt (MW) Twin Ridges Wind Farm – here’s why repowering projects like this are the future of the wind industry.
Wind energy repowering is all about breathing new life into older turbines or entire wind farms. By swapping out aging parts like turbines, blades, and nacelles for the latest tech, wind farms can see significant boosts in efficiency, power capacity, and overall lifespan. Other infrastructure and control systems can also get a second life, too.
Adding new components to existing infrastructure and grid connections mean it’s less expensive to extend the life of the wind farm with fewer resources. New components make the turbines less prone to breakdowns which means less maintenance, so there are fewer operational costs. Plus, a wind farm’s debt is usually paid off at around 10 years, and it qualifies for new tax credits and new financing at around that time. Existing wind farms often have power purchase agreements in place, and data companies are increasingly chasing power sources as demand grows.
Repowering Twin Ridges meant keeping all 68 towers and foundations while swapping out the nacelles and blades. Vestas, which has identified the repower market as a huge opportunity and engineered a solution that’s compatible with most turbines, supplied US-made nacelles, hubs, blades, and tower adaptors for the project. (Twin Ridges’ original supplier, RES, is no longer in business.)
Jim Spencer, CEO of Exus Renewables North America, said of Twin Ridges, “This upgrade will increase the power generation by 30%, which is a lot more power going into the grid. Repowering will allow it to use more of its allotted grid capacity since wind farms don’t operate at maximum capacity 100% of the time.”
Unlike a new wind farm, which comes online all at once, a repowered wind farm sees refurbished turbines turned on one at a time since the infrastructure is already in place. Out of its 68 upgraded turbines, Twin Ridges has brought 40 repowered turbines online, and a 41st turbine will soon follow.
Industry estimates suggest that up to 50 GW of US onshore wind capacity will be assessed for repowering in the next few years.
Read more: Renewables now make up 30% of US utility-scale generating capacity
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