Three Winding Transformers for Smart Power Substations

Three-winding transformer model is widely utilized in High Voltage Direct Current (HVDC) system or railway power supply system. Coupled with a diode rectifier, the application of three winding transformers for power distribution is now increasing because of increased demand for reliable and available electrical supply. This paper analyzes the application of a three-winding transformer as a primary power distribution system instead of a standard two-winding transformer. Moreover, we present a fast calculation of short circuit current.