Design and Analysis of High-Impedance Integral Transformer

Transformer is a static electrical equipment that uses the principle of electromagnetic induction to achieve voltage change. Its main function is to realize voltage conversion, current conversion, impedance conversion, isolation, voltage regulation, etc. In order to limit the short-circuit current of the transformer, high-impedance transformers are used more and more widely. Traditional transformer series reactor can solve the problem of transformer high impedance, but it has certain limitations in terms of limited space and economic cost. In this paper, we analyze three ways to increase transformer impedance through principle analysis, calculation simulation, and test verification results by using the scheme of placing reactors in transformers to form high-impedance all-in-one transformers.