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Methods for Transformers Switching Transients Analysis

Analysis of transformer transients enables taking justified decisions during the development of its design, requirements for the operating conditions, and means of protection. The influence of transformers switching transients is very significant. Even turning on an unloaded transformer may cause current peaks 10-15 times exceeding the nominal value.In order to analyze transient equations, there is a need to compose B-H saturation curve that can be estimated only experimentally. In this paper, we present the two methods for magnetization curve approximation with continuous exponential functions.