engleski

Power transformer winding model for lightning impulse testing

This paper presents a method for calculating the internal voltage transients useful for power transformer winding modelling. The method is based on lumped parameter model of a transformer winding and the transient response is obtained using time-domain analysis. Lumped circuit parameters are calculated using self-developed solvers which are benchmarked using professional finite element method (FEM) software. The results show that the presented approach gives satisfactory results and is computationally very fast.

power transformers ; numerical simulation ; electromagnetic transients ; time-domain analysis ; coils ; internal overvoltages

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