Orta Gerilim Kablolarında Kısmi Boşalma Analizi Üzerine Deneysel Bir Yaklaşım

Year 2018, Volume: 18 Issue: 3, 904 - 912, 30.12.2018

Fatih Serttaş Fatih Onur Hocaoğlu

Abstract

Elektriksel kısmi boşalmalar, yüksek gerilim arızalarının büyük bir çoğunluğunu oluşturmaktadır. Yalıtkan malzemelerde hasar meydana getirebilecek kadar güçlü elektrik alanın olduğu her yerde elektriksel kısmi boşalma (deşarj) oluşabilir. Trafolarda, yüksek gerilim kablolarında veya diğer yüksek gerilim elemanlarında meydana gelen kısmi boşalmaların yeri, büyüklüğü ve meydana gelme sıklığı doğru tespit edilemezse zaman içerisinde önemli kalıcı hasarlara sebep olmaktadır. Bu çalışmada, orta gerilim hatlarında yaygın olarak kullanılan XLPE kabloları üzerinde kısmi boşalma ölçüm testleri gerçekleştirilmiştir. XLPE kablolar üzerinde çeşitli küçük hasarlar (defektler) oluşturulmuş ve laboratuvar ortamında bu kablolar yüksek gerilim altında test edilmiştir. Defektler, sahada kablo montaj işlemlerinde meydana gelebilecek-gelebilen hasarlar ve kabloların üretiminden kaynaklanabilecek iç kısmi boşalmalar göz önüne alınarak oluşturulmuştur. Testlerden elde edilen kısmi boşalma sinyallerinin istatistiksel özellikleri incelenmiş ve analiz edilmiştir. Sonuç olarak kablo üzerindeki yakın özellikteki farklı defektlerde kısmi boşalma sinyallerinin farklı özellikler gösterebildiği görülmüştür.

Keywords

XLPE Kablo, Kısmi Boşalma, Deşarj, Yüksek Gerilim, İstatistiksel Öznitelikler

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