دانلود مقاله ISI انگلیسی شماره 57579
عنوان فارسی مقاله

بررسی تغییر شکل مکانیکی در دو سیم پیچ ترانسفورماتور واحد با استفاده از مدل مدار مرتبه کاهش یافته

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
57579 2016 10 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Assessing mechanical deformations in two-winding transformer unit using reduced-order circuit model
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : International Journal of Electrical Power & Energy Systems, Volume 79, July 2016, Pages 235–244

کلمات کلیدی
سنتز مدار؛ تشخیص؛ تحلیل پاسخ فرکانسی؛ تغییر شکل مکانیکی؛ اندازه گیری ترمینال - ترانسفورماتور
پیش نمایش مقاله
پیش نمایش مقاله بررسی تغییر شکل مکانیکی در دو سیم پیچ ترانسفورماتور واحد با استفاده از مدل مدار مرتبه کاهش یافته

چکیده انگلیسی

Certain level of mechanical deformations in winding does not hamper the normal performance of power transformer. However, such incipient deformations if unattended could result in permanent failure of transformer. To this end, an approach is proposed to assess the severity of mechanical deformations in transformer winding. These deformations get reflected as changes in its high frequency behaviour. Hence, characterising the high frequency behaviour is essential. This requires building physically realisable ladder circuit corresponding to each winding. Thus, n-winding transformer is represented by n electrically and magnetically coupled ladder networks. In such scenario, the objective of fault diagnostics becomes very challenging. In this effort, realising the multi-winding unit by reduced-order ladder circuit model is explored. This approach essentially involves energising one winding at a time. Then, reduced-order ladder circuit of considered unit is synthesised from its measured driving-point impedance data. It is shown how these circuit models could be used for identifying mechanical deformations. To demonstrate capability of the method, two-winding model transformer is considered and deformations are introduced in its outer winding. Then, reduced-order circuit models are synthesised corresponding to healthy and faulty state of model transformer. The location of fault is identified by the changed parameter in the circuit. Further, the amount of change reveals the severity of introduced deformation. In all the cases, synthesised reduced-order circuit model agrees with that of model transformer with regard to driving-point impedance plot and results are found satisfactory.

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