Amorf Çekirdekli Transformatörün Çoklu Fizik Yöntemiyle Elektromanyetik - Sıcaklık Analizi

Yıl 2021, Cilt: 21 Sayı: 5, 1086 - 1096, 31.10.2021

Atabak Najafı , İres Iskender

https://doi.org/10.35414/akufemubid.836620

Öz

Bu makalede, Amorf nüveli transformatörün sıcaklık analizini detaylı incelemek için, ısı transferi, akışkan akışı ve elektromanyetik analizlerini kapsayan çok disiplinli bir yaklaşım kullanılmıştır. Transformatörün bobini ve çekirdeğindeki güç kayıpları incelenip, sıcaklık ve akışkan akış analizleri elektromanyetik bir model ile birleştirilmiştir. Önerilen yöntem, Amorf çekirdekli gibi özel transformatörlerde, önceki noktasal sıcaklık bilgisine ya da sıcaklık Gradyan değerlerine ihtiyaç duymadan, sıcaklık değişimini detaylı olarak tahmin edebilmektedir. Teorik çalışma sonuçları uluslararası standartlara göre Dyn11, 34.5/0.4-kV, 630-kVA’lik amorf çekirdekli transformatör üzerine uygulanan deneysel çalışma sonuçlarıyla doğrulanmıştır. Teorik ve pratik çalışma sonuçlarının karşılaştırılması, sonuçların büyük bir uyum içinde olduğunu göstermekte olup, kullanılan yöntem genç mühendislere güç transformatörlerin sıcaklık analiz çalışmalarında faydalı bir araç oluşturmaktadır.

Anahtar Kelimeler

Sıcaklık dağılımı, Amorf çekirdek, Sonlu elemanlar analizi, Elektromanyetik kuplaj

Electromagnetic-Temperature Analysis of Amorphous Core Transformer by Multiple Physics Method

Öz

To investigate the thermal analysis of the amorphous core transformer in detail, a multidisciplinary approach including heat transfer, fluid flow and electromagnet analysis has been used in this study. Thermal and fluid flow analysis have been combined with an electromagnetic model to study specific power losses in the coil and core. The proposed methodology is able to predict thermal distribution in detail in specific transformers such as amorphous core transformers, without requiring prior knowledge of nodal temperature or temperature gradient values. The results of the numerical study were confirmed by experimental results performed on a Dyn11, 34.5/0.4-kV, 630-kVA, transformer with amorphous core through thermal tests carried out according to the International Standards for oil immersed transformers. Comparison of theoretical and experimental results obtained in the study are in a good agreement and it will provide a useful tool for young engineers in thermal analyzing the power transformers.

Anahtar Kelimeler

Temperature distribution, Amorphous core, Finite element analysis, Electromagnetic coupling

Kaynakça

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