A Space Vector Modulation Strategy for Maximum Port Power Distribution Range in a Three-Port Three-Phase Converter

Three-port converters with two DC ports and an AC port have applications in many cases which is sensitive to volume. The fundamental of the converter control is to distribute the power between DC sources according to the power demand of the load and the characteristics of the DC sources. A space vector modulation strategy to realize maximum port power distribution ratio in a three-port three-phase converter is presented in this paper, which can realize maximum power distribution range for DC sources at any power factor. The low voltage source can provide or absorb power at a very low voltage, which expands the working range of the converter. The details are illustrated in this paper, and the operation range is calculated under certain voltage conditions. A 3-kW prototype verified the proposed strategy.