Magnetic Integration and Modeling of Hybrid Distribution Transformer

Hybrid distribution transformer (HDT) has powerful controllability for system currents and voltages. To reduce the number of discrete magnetics and make highly efficient use of the magnetic materials, an HDT with magnetic integration (IMHDT) is proposed in this paper. The key methods for the design of this IMHDT are inserting the leakage magnetic iron cores and sharing the common magnetic branches. The 3-D finite element analysis model of IMHDT is established. The magnetic flux density distribution analysis verifies the design correction of IMHDT. The equivalent electric-magnetic circuit model and PI control system of IMHDT are established to verify the validity of the proposed IMHDT.