Symmetrical Components and Space-Vector Transformations for Four-Phase Networks

In recent years, literature has presented an increasing number of contributions showing a rising interest in four-phase symmetric networks with reference to power electrical systems and electromechanic conversion and drivers. In this paper, a complete methodological analysis of four-phase systems, based on the phasorial and instantaneous sequence components, is presented for sinusoidal and dynamic conditions. This approach allows for the formalization of the theoretical and applicative methodologies necessary for the development of four-phase systems in a systematic and unified way.