Refinement of Reliability Grid Codes in the Provision of Ancillary Services
Finding the right safety bar for wind farms selling emergency power
Denmark's grid operator requires wind farms and other unpredictable power sources to guarantee they can deliver emergency reserves 90% of the time — but that threshold was never actually optimized. Researchers built a model to find the true cost-reliability sweet spot and discovered the standard could drop to around 85% without sacrificing grid safety, cutting costs by up to 14.5%.
As grids add more wind and solar, they rely increasingly on these uncertain sources for emergency backup power. Setting reliability rules too high wastes money; too low risks blackouts. This work provides a concrete method to find the actual optimal threshold instead of guessing — potentially saving millions in grid costs across Europe's renewable-heavy systems while maintaining the same safety margin.