instantaneous frequency deviation definition
instantaneous frequency deviation means a set of data measurements of the overall system frequency deviations for the synchronous area with a measurement period equal to or shorter than one second used for system frequency quality evaluation purposes;
instantaneous frequency deviation means a set of data measurements of the frequency deviation with a measurement period equal to or shorter than one second;
instantaneous frequency deviation means the maximum excursion of frequency, following a disturbance, from its pre-disturbance value;