A phasor estimation algorithm based on conics analysis with vector analytic geometry

摘要

Phasor frequency, magnitude, and angle describing a sinusoidal signal are widely used as critical variables in algorithms and performance indices in power systems, such as WAMS applications, that require shorter response times for estimated phasors, and accuracy for phasor calculation, especially under dynamic conditions. This paper proposes a novel approach for estimating phasor parameters, in real time based on conics, studied with vector analytic geometry. This algorithm is capable of estimating phasor parameters in a very short length window of an input signal. The new IEEE Standard C37.118.1-2011 and C37.118.1a-2014 for synchrophasor measurements include the dynamic performance requirements for phasor measurement units. It is shown that the proposed algorithm features fast response and achieves high accuracy, under frequency changes tests of the new IEEE Standard. This work also presents a detailed performance comparison with existing phasor estimation algorithms.