ALEXANDRIA, Va., March 26 -- United States Patent no. 12,261,439, issued on March 25, was assigned to VESTAS WIND SYSTEMS A/S (Aarhus N, Denmark).

"Method for damping power oscillation in an electric power grid" was invented by Lennart Petersen (Skodstrup, Denmark) and Torsten Lund (Fredericia, Denmark).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for damping power oscillation in an electric power grid, comprising: performing a procedure for determination of a phase shift between a filtered voltage signal and a filtered frequency signal; based on the performed procedure, determining which one of the filtered voltage signal and filtered frequency signal is leading or lagging in relation to the other...