how does phase shifting transformer work?

A phase-shifting transformer (PST) is designed to control the flow of power in electrical networks by adjusting the phase angle between input and output voltages. It achieves this by using multiple windings and a specific configuration that allows for phase shifts, typically ranging from 0 to 30 degrees. By altering the phase, PSTs can manage power distribution, reduce congestion, and enhance stability in transmission systems, effectively optimizing the flow of electricity in interconnected grids.