Method for determining the amplitude and phase angle of a measuring signal corresponding to a current or voltage of an electrical power supply network

摘要: A method for determining the amplitude and phase angle of a measuring signal corresponding to current or voltage on an electrical power supply network by using sampled values signal, model containing at least sinusoidal component being used calculate with applying recursive least-squares estimation method. In order be able determine frequency together angle, use is made in accordance relationship y=A·sin(2πft+φ), this (y m ), determination (u ) as well carried out via nonlinear By expanding model, signals DC frequencies that change over time also can investigated.