Instantaneous phasor method under severely unbalanced situations

The new instantaneous phasor method originated by the author for obtaining instantaneous balanced fundamental components is further studied under severely unbalanced situations. Selection of the initial and synchronization phasors becomes important. An example is presented. This technique may substitute for the fast Fourier transformation (FFT) plus symmetrical component method for active power quality control and for continuous diagnostics. The influence of high magnitudes of harmonics will be discussed in a separate paper