Influence of supply frequency on dissipation factor measurement and stator insulation diagnosis
نویسندگان
چکیده
منابع مشابه
Study of Aging Characteristics of Generator Stator Insulation Based on Temperature Spectrum of Dielectric Dissipation Factor
In this paper, accelerated multi-factor aging tests in laboratory have been conducted on the stator ham of a large generator. During the period of aging, the temperature spectra of dielectric dissipation factor tan 6 of stator insulation were employed to investigate aging characteristics of insulation materials. Test results showed that the peak temperature T,,, of the tan 6 -T curve under 0.2U...
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about internal defects within the insulation. The index k is defined as the proportionality constant between the changes at high voltage of capacitance ∆C and of the dissipation factor ∆tanδ . ∆C and ∆tanδ values were highly correlated when small flat defects were within the insulation and that correlation was lost in the presence of large narrow defects like electrical treeing. The discriminat...
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Very Low Frequency (VLF) tests are often used for after-laying tests of power cables since the reactive power demand is much lower at VLF than at 50 Hz. In order to augment the usefulness of the test, it is often complemented by a measurement of dielectric dissipation factor (tan ), where the acceptance of the tested object is based on this measurement. A traceability chain for dissipation fac...
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در طی سالهای اخیراستفاده ازمنابع انرژی تجدید پذیر در شبکه های مدرن بنا به دلایل زیست محیطی و اقتصادی به طور گسترده استفاده شده است همچون نیروگاههای بادی و خورشیدی .ولتاژتولیدی این نیروگاهها اغلب به فرم dc می باشد وادوات الکترونیک قدرت به عنوان مبدل و پل بین شکل موج dc وac استفاده می شوند.این پروسه باعث ایجاد پالسهایی برروی شکل موج خروجی می شود که می تواند وارد تجهیزات قدرت همچون ترانسفورماتور ی...
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ژورنال
عنوان ژورنال: Advances in Science, Technology and Engineering Systems Journal
سال: 2018
ISSN: 2415-6698
DOI: 10.25046/aj030119