The Hilbert transform adaptation for measuring amplitude and phase low-frequency disturbances in power system voltage

E-mail Print PDF

Andrzej Bień

Phase disturbances in electric power signals are neglected and only amplitude (envelope) distortions are discussed in literature. Amplitude disturbances are interpreted as Amplitude Modulation (AM) of the main 50 Hz frequency. Detailed analyses of all disturbances and their sources are presented in this paper. It is shown that AM and narrow band PM (phase modulation) take place in power networks simultaneously, and those two modulations interact with each other. Voltage variation is proposed for disturbance measurement. Theoretical results are verified by field experiments and their results are presented here.

altDownload full text