Abstract
A power flow calculation method of power grid with a unified power flow controller is disclosed for calculating power flow of a large power grid. The unified power flow controller includes a series transformer, a series converter, a DC coupling capacitor, a shunt converter, and a shunt transformer. The shunt transformer is electrically connected to a transmitter bus and the series transformer is electrically connected to the transmitter and a receiver bus. The unified power flow controller utilizes a static model to represent equivalent active and reactive loading of the power grid transmitter and the receiver bus resulted from the unified power flow controller.