Active and reactive power metering in non-sinusoidal conditions using newton type algorithm

Abstract

This paper presents a new two stage Newton Type numerical algorithm for active and reactive power measurement in electric power systems with sinusoidal, non-sinusoidal linear and non-sinusoidal nonlinear circuits. In order to estimate their spectra, in the first stage of the algorithm the current and voltage signals are separately processed, whereas in the second stage the power components are calculated. As the main advantage, this technique provides measurements not sensitive to frequency deviations. The algorithm performance is tested using computer simulated tests.