New Implementation of Nearest Vector Selecting Space Vector Control for Three-Phase Multilevel Voltage Source Inverter

The paper offers a more simple alternative to the well known space vector control algorithm with the nearest vector selection for three-phase multilevel voltage source inverters with enough high number of levels. This space vector control is righteously considered to be one of the most promising algorithms for medium and high voltage converters providing sufficient voltage quality at low switching frequency. The offered technique has been developed in the context of the space vector algorithm of two delta voltages which use barycentric and affine (oblique-angled) coordinates on triangles of three nearest vectors to the reference one. This approach to space vector control for an arbitrary number of inverter levels needs no preliminary finding of any coefficients and holding them in look-up tables.