PROCESS FOR DETERMINING THE HARMONIC OSCILLATIONS OF THE FUNDAMENTAL COMPONENT OF AN ELECTRIC SIGNAL

摘要

A process is disclosed for determining the harmonic oscillations of the fundamental component of an electric signal. The signal is scanned at a scanning frequency that represents a multiple of the frequency of the fundamental component. The scanned analog values are converted into digital values then subjected to a discrete Fourier transformation in order to determine the harmonic oscillations. In order to implement such a process as easily as possible, the scanning frequency is a non-integer multiple (N') of the fundamental component frequency (fgr) and the discrete Fourier transformation is carried out at the same time as the frequency resolution is increased over several periods of the fundamental component in order to determine the harmonic oscillations (H2 to H16).