The Selection of Rated Voltage on Medium and Low Voltage Side of Transformer

This paper briefly describes the principle of voltage regulation of 220kV transformer, discusses the influence of selection of rated voltage on medium and low voltage side of transformer, discusses the reasons for the contradiction of voltage adjustment on the medium and low side of transformer, and puts forward several solutions to the voltage adjustment with a concrete example, which has some reference significance in power grid operation and 220kV substation design.