A METHOD FOR DETECTING POWER OSCILLATION IN AN ELECTRIC POWER GRID

A method for detecting power oscillation in an electric power grid (102), wherein the method comprises: integrating (201a) a filtered signal (134) on a first interval (136a), the filtered signal (134) being associated with the electric power grid (102); based on the integration of the filtered signal (134) on the first interval (136a), determining (202a) a positive half-period area (A) of the filtered signal and a negative half-period area (B) of the filtered signal (134), one (A, B) of the positive half-period area (A) and negative half-period area (B) being immediately subsequent to the other one (A, B); and determining (203a) that a power oscillation in the electric power grid (102) is detected if the following two conditions are met:• a sum of the positive half-period area (A) of the filtered signal (134) and the negative half-period area (B) of the filtered signal (134) is below a first threshold; and• the absolute value of one (A, B) of the positive half-period area (A) and negative half-period area (B) is above a second threshold.