Open‐end transformer‐based power tap for interconnection of AC/DC micro‐grids

Abstract

This paper proposes an open-end transformer-based power tap (OETPT) for the interconnection of the AC sub-grid and the DC sub-grid of a hybrid micro-grid. Two topologies, Topology-A and Topology-B, were designed for OETPT, in which the primary or the secondary windings of the transformer of OETPT are grounded, respectively. Steady-state and dynamic models were developed for OETPT, based on which a vector control system was designed for the coordinated control of OETPT with Topology-A and Topology-B, respectively. OETPT achieves the decoupled control of the active and reactive powers. Simulation studies and experimental validations were undertaken to manifest the coordinated power flow control performance of OETPT with Topology-A and Topology-B, respectively.