Testing of Models of Powerful Power Transformers to Check Their Resistance to Short Circuits. Part 2. Examples of Models of Block Transformers

In the previous article (Part 1), the basic principles and international experience (according to CIGRE) of the development, calculation, and testing of the short-circuit resistance of large-scale models of powerful single-phase power transformers, as well as the rules for distributing test results of the model of a real transformer in order to confirm its resistance to short circuits, are considered. The importance of developing and testing such models to substantiate the reliability of domestically produced high-power transformers is noted. The article provides more detailed calculations of one of the 570-MVA transformer layouts described in the previous article. The results of the preliminary design of the two most commonly used transformers in the Russian Federation, with a capacity of 630 and 417 MVA, and their corresponding layouts based on calculations of resistance to short circuits using the REST-VEI method are also considered.