Reduced Reference Frame Transformation Assessment in Unbalanced Three-Phase Four-Wire Systems

Three-phase four-wire systems require a reference frame similar to that used in 3-phase 3-wire system configurations allow them be easily analysed, modelled and controlled. A new called Reduced Reference Frame (RRF) was presented by the authors previous work satisfy these objectives. This is based on locus of voltage space vector which perform transformation applied 4-wire systems. paper uses proposed RRF demonstrate benefits this under different conditions load or imbalance. To end, types imbalances considered are studied comparing results classical αβγ axes, so-called mno -transform specifically developed for coordinates. In addition, theoretical identification some done simulation fundamentals RRF.