Review on the Technology and Engineering Application of Phase Shifting Transformer

With massive new energy integrated into the power grid, the power grid presents the characteristics of increasing scale and complex structure, which may bring the hidden danger of unreasonable distribution of power flow. As an effective power flow control device, the phase shifting transformer (PST) has the advantages of good regulation performance, no change of grid structure, low investment cost, and good application prospect. Firstly, this paper introduces the working principle of PST from the perspectives of operation principle, basic structure, and specific classification. Secondly, the engineering applications and production status of PST at home and abroad are analyzed. Finally, based on the grid demand for power flow regulation, the development trend and application prospects of PST are discussed.