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- W3214293570 abstract "A transformer is one of the most important assets in an electric power generation system. Wind turbine step-up transformers have recently seen premature failures due to high-frequency repetitive transients. The high-frequency transients under resonance can severely damage the insulation of the transformer. Thus the paper initially analyses the distribution of transformer frequency response to identify critical resonance frequencies for the two transfer function frequency responses; namely, impedance frequency response and voltage ratio response. Transformer frequency response is compared with transient response to understand the influence of repetitive transient parameters; namely applied voltage amplitude, rise time, and duty cycle, on transient distribution along the transformer winding. Based on three variable experiments, the range of rise time was considered as less than 300 ns and 1000 ns, applied voltage considered was 100 V and 1000 V, and duty cycle considered was 10% and 50%. For the current transformer model, both the experimental and PSCAD simulation results indicated that a duty cycle of 50% and rise time < 300 ns were critically damaging to transformer insulation. The research helps in designing transformer insulation stressed under different transient parameters." @default.
- W3214293570 created "2021-11-22" @default.
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- W3214293570 date "2022-02-01" @default.
- W3214293570 modified "2023-09-27" @default.
- W3214293570 title "Influence of pulse rise time and duty cycle on distribution of transients along the wind turbine step-up transformer windings" @default.
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- W3214293570 doi "https://doi.org/10.1016/j.epsr.2021.107646" @default.
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