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【答案】应助回帖
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hsf_edu: 金币+200, 翻译EPI+1, ★★★★★最佳答案, 非常之有用，金币全部给你了，谢谢！ 2014-12-10 08:34:23
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A group of differential equations were proposed, based on the transformer equivalent circuit, for constraining the flux variation during the transient process of a transformer after no-load closing by piecewise linearization. A group of mathematical expressions depicting the flux variation law during the transient process were obtained by solving the above differential equations. Thereafter, another group of iterative formulae for the digital simulation of the inrush current were obtained by describing the flux variation law at different time segments, based on which the variation curves involving flux, current and their (its?) components during the inrush current process were drawn. Moreover, their typical local variation characteristics were analyzed, and a reasonable explanation was given. Finally, the reason for the inrush current attenuation, the variation law of the inrush current attenuation rate, and the factors affecting the inrush current attenuation rate were analyzed by mathematical derivation, and some useful conclusions were drawn that were confirmed by the simulation results. |
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