Cross phases hybrid transformer for managing and improving the energy quality

•New three-phase structure of hybrid transformer based on the cross-phase method.•Voltage regulation in the loads even in the case of severe unbalanced voltage sags.•Unitary power factor at input.•Active power balance at the input of the CPHT.•Harmonic filtering at the primary winding. The presence of harmonic currents in three-phase distribution networks and the stochastic behavior of unbalanced loads with different power factors are undoubtedly responsible for power quality problems. This paper proposes a novel solution named Cross Phases Hybrid Transformer (CPHT) to address those issues. The CPHT incorporates a conventional distribution transformer into an AC/AC power electronic stage referred to as cross phase module. This new hardware configuration allows to achieve continuous three-phase energy supply of distinct loads as well as high energy quality indexes for diverse distribution networks. The proposed solution has been numerically and experimentally validated by means of simulations carried out in Simulink and with a scaled-down laboratory prototype respectively. The validations consider distinct case studies to show the operative advantages of the CPHT with respect to other topologies reported in the literature.