Equivalent Model Design and Test for Short Circuit Cumulative Effect of EHV Transformer

The actual 500kV transformer in operation is difficult to have short-circuit and research properties of the test conditions of the cumulative effect, transportation and multiple tests are expensive. It is of great engineering practical value to replace the original model with the real model which has the similar physical characteristics and mechanical vibration to do short-circuit and research tests. Firstly, under the condition of which the real model and the original model have the similar physical characteristics constant and the mechanical vibration, according to the relation of physical quantities, the equivalent criterion is deduced. Then, according to the equivalent criterion of the original transformer and the true model, a true model of 110kV transformer is designed. Secondly, the simulation software is used to verify the correctness of the equivalent and analyze the stress and mechanical vibration of the original model and the true model. Finally, many tests and researches have been carried out for the cumulative effect of short circuit. (paper)