ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,560,151, issued on Feb. 24, was assigned to ABB Schweiz AG (Baden, Switzerland).
"Grid frequency control in an offshore wind farm" was invented by Lennart Harnefors (Vasteras, Sweden) and Ioannis Tsoumas (Zurich, Switzerland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of controlling a wind farm including a plurality of wind turbines installed in an AC subgrid, which is connected via a high-voltage rectifier and a DC line to an energy conversion device, the method including: controlling a power infeed of each wind turbine to maintain a setpoint grid frequency of the subgrid; sensing a grid frequency in the subgrid; determining a reference qua...