An example of 3-phase transformer modeling for distribution system analysis

This panel presentation summary describes a technique of developing a multiwinding, multiphase transformer model for distribution systems analysis. The model can be expressed concisely and is readily implemented in common general-purpose matrix manipulation software. One challenging example is given: the ungrounded wye/delta case from the IEEE PES 4-Bus Radial Test Feeder system. The primitive Y matrix model is developed using the Matlab program. Its use in a general distribution system analysis program is described.