engleski

High-frequency power transformer modeling

The detailed study of high-frequency over- voltages propagating inside the electrical systems of a power plant requires a precise modeling of power transformers at high frequencies. These over- voltages may originate from lightning overvoltage propagating along the transmission line and crossing the step-up transformer, they may originate also for instance from vacuum circuit breaker switching. Power transformers possess several natural frequencies and steep front over- voltages are particularly dangerous for them because a large part of the applied over-voltage is concentrated on the first turn of the windings. The Faculty of Electrical Engineering of Zagreb and EDF R&D are working in collaboration to develop a model of transformer for high- frequencies compatible with EMTP-RV. The presentation shows some elements of this work.

high-frequency ; power transformer ; modeling ; EMTP-RV

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