ISITMA ÇEVRİMİ TESTLERİ ALTINDA XLPE YALITIMLI OG KABLOLARDA ELEKTRİKSEL PARAMETRE DEĞİŞİMLERİNİN DENEYSEL İNCELENMESİ

Abstract

Bu çalışma, orta gerilim kablolarında yalıtım performansının değerlendirilmesine yönelik kapsamlı bir deneysel yaklaşım ortaya koymaktadır. Yalıtım malzemesinin dielektrik dayanımını ve dayanıklılığını ayrıntılı olarak incelemek için kısmi deşarj (PD), dielektrik kayıp faktörü (tan δ) ve ısıtma çevrimi testlerinin bir kombinasyonu kullanılmıştır. Deneyler 20,3/35 kV’luk bir kablo üzerinde gerçekleştirilmiş ve standardın öngördüğü 20 çevrimlik ısıtma çevrimi testi 40 çevrime çıkarılmıştır. Bu değişiklik, malzemenin uzun süreli ve hızlandırılmış ısıl yaşlandırma koşullarına karşı verdiği tepkilerin daha net gözlemlenmesine imkân tanımıştır. PD ve tan δ ölçümleri, dielektrik kayıpları, mikro çatlaklar ve olası yapısal zayıflıklar da dahil olmak üzere yalıtım içindeki küçük bozulmaları tespit etmek için kritik veriler sağlamıştır. Gerekli ısıtma çevrimi sayısının iki katına maruz kalmasına rağmen, kablo izolasyonunda herhangi bir arıza görülmemiş olup, tüm değerler standartlarda belirtilen sınırlar içinde kalmıştır. Genel olarak, sonuçlar test edilen kablonun zorlu çalışma koşullarında bile kararlı ve güvenli performans gösterebildiğini ortaya koymaktadır. Bu bulgular, kablonun hem malzeme kalitesinin hem de tasarımının yüksek düzeyde dayanıklılık ve güvenilirlik sağladığını ve bu nedenle sahada uzun süreli uygulamalar için uygun olduğunu doğrulamaktadır.

Keywords

• Yaşlandırma
• Isıtma çevrimi
• Orta gerilim kabloları
• Kısmi deşarj
• Tan delta

Thanks

Bu çalışma kapsamında, Vatan Kablo Fabrikası laboratuvar tesisleri kullanılarak deneysel testler gerçekleştirilmiştir. Yazarlar, destekleri için Vatan Kablo'ya teşekkür eder.

EXPERIMENTAL INVESTIGATION OF ELECTRICAL PARAMETER VARIATIONS IN XLPE INSULATED MV CABLES UNDER HEATING CYCLE TESTS

Abstract

This study presents an experimental approach to evaluate the insulation performance of medium-voltage power cables. A combination of partial discharge (PD), dielectric dissipation factor (tan δ), and heating cycle tests was used to examine the dielectric strength and durability of the insulation material in detail. The experiments were conducted on a 20.3/35 kV cable, and the standard 20-cycle heating test was deliberately extended to 40 cycles. Thus, a clearer understanding of the cable’s response under long-term and accelerated thermal aging conditions is obtained. The measurements of PD and tan δ offered critical data for detecting small degradations within the insulation, including dielectric losses, micro-cracks, and possible structural weaknesses. Although the cable is exposed to two sets of heating cycles, the cable insulation showed no failures, and all values remained within the limits specified by the standards. The results indicate that the tested cable can maintain stable and safe performance even under demanding operating conditions. These findings confirm that both the material quality and the design of the cable provide a high level of endurance and reliability, making it suitable for long-term applications in the field.

Keywords

• Aging
• Heating cycle
• Medium-voltage cables
• Partial discharge
• Tan delta

Thanks

Within the scope of this study, experimental tests are conducted using Vatan Kablo Factory laboratory facilities. The authors would like to thank Vatan Kablo for their support.

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