Thermal and structural analysis of oil-based type transformer

Beyza Nur Dursun; Bulent Ekici

Article Details

Thermal and structural analysis of oil-based type transformer

Authors:

Beyza Nur Dursun | Bulent Ekici

Publisher:

Nigde Omer Halisdemir University

Main Topics:

Makine Mühendisliği (Diğer)

Journal:

Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi Vol.13 Issue 1, pp.84-93

Document Type:

Article

Publication Date:

1/2024

Document Language:

English

Document ID (Org No.):

2001309733

pISSN:

2564-6605

Keywords:

Abstract:

 In this paper, a hermetically sealed transformer with a power of 1600 kVA is used to make the mechanical calculations and analysed according to the heat generated by energy transmission. The heat generated on the transformer causes the insulation oil to heat up and increase in volume. Accordingly, the increasing insulation oil volume in the transformer tank causes a pressure increase on the tank. In our study, mechanical stresses created by the temperature and pressure increase due to the heat generated are calculated. These calculations are investigated according to strength, cooling, and construction approaches of tank with the corrugated wall and analysed its effect in design using ANSYSFLUENT and ANSYSMECHANICAL combination simulation software based on Finite Element Method. Temperature distribution and thermal limitations are critical to correct design. Temperatures exceeding the permissible thermal limits can cause serious damage to transformer components. On the other hand, a tested prototype tank is provided to compare the numerical, analytical, and experimental values. However according to the results, the stress concentrations are observed at the critical connection points, indicating the possibility of failure if an extra unexpected load is real.

 In this paper, a hermetically sealed transformer with a power of 1600 kVA is used to make the mechanical calculations and analysed according to the heat generated by energy transmission. The heat generated on the transformer causes the insulation oil to heat up and increase in volume. Accordingly, the increasing insulation oil volume in the transformer tank causes a pressure increase on the tank. In our study, mechanical stresses created by the temperature and pressure increase due to the heat generated are calculated. These calculations are investigated according to strength, cooling, and construction approaches of tank with the corrugated wall and analysed its effect in design using ANSYSFLUENT and ANSYSMECHANICAL combination simulation software based on Finite Element Method. Temperature distribution and thermal limitations are critical to correct design. Temperatures exceeding the permissible thermal limits can cause serious damage to transformer components. On the other hand, a tested prototype tank is provided to compare the numerical, analytical, and experimental values. However according to the results, the stress concentrations are observed at the critical connection points, indicating the possibility of failure if an extra unexpected load is real.

 In this paper, a hermetically sealed transformer with a power of 1600 kVA is used to make the mechanical calculations and analysed according to the heat generated by energy transmission. The heat generated on the transformer causes the insulation oil to heat up and increase in volume. Accordingly, the increasing insulation oil volume in the transformer tank causes a pressure increase on the tank. In our study, mechanical stresses created by the temperature and pressure increase due to the heat generated are calculated. These calculations are investigated according to strength, cooling, and construction approaches of tank with the corrugated wall and analysed its effect in design using ANSYSFLUENT and ANSYSMECHANICAL combination simulation software based on Finite Element Method. Temperature distribution and thermal limitations are critical to correct design. Temperatures exceeding the permissible thermal limits can cause serious damage to transformer components. On the other hand, a tested prototype tank is provided to compare the numerical, analytical, and experimental values. However according to the results, the stress concentrations are observed at the critical connection points, indicating the possibility of failure if an extra unexpected load is real.

 Bu çalışmada, 1600 kVA gücünde hermetik olarak kapatılmış bir transformatör kullanılarak mekanik hesaplamalar yapılmış ve enerji iletiminden kaynaklanan ısıya göre analizleri yapılmıştır. Transformatörde oluşan ısı izolasyon yağının ısınmasına ve hacminin artmasına neden olur. Buna bağlı olarak trafo tankında artan izolasyon yağı hacmi tank üzerinde basınç artışına neden olur. Çalışmamızda sıcaklığın oluşturduğu mekanik gerilmeler ve oluşan ısıya bağlı olarak basınç artışı hesaplanmıştır. Bu hesaplamalar, oluklu duvarlı tankın mukavemet, soğutma ve yapım yaklaşımlarına göre incelenmiş ve sonlu elemanlar yöntemine dayalı ANSYSFLUENT ve ANSYSMECHANICAL kombinasyon simülasyon yazılımı kullanılarak tasarımdaki etkisi analiz edilmiştir. Sıcaklık dağılımı ve termal sınırlamalar doğru tasarım için kritik öneme sahiptir. İzin verilen termal sınırları aşan sıcaklıklar, transformatör bileşenlerinde ciddi hasara neden olabilir. Öte yandan sayısal, analitik ve deneysel değerlerin karşılaştırılması için test edilmiş bir prototip tank sağlanmıştır. Ancak sonuçlara göre, kritik bağlantı noktalarında gerilme yoğunlaşmaları gözleniyor, bu da ekstra beklenmedik bir yükün gerçek olması durumunda sorun olasılığını gösteriyor.

Article Details

Thermal and structural analysis of oil-based type transformer

Authors:

Beyza Nur Dursun | Bulent Ekici

Publisher:

Nigde Omer Halisdemir University

Main Topics:

Makine Mühendisliği (Diğer)

Journal:

Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi Vol.13 Issue 1, pp.84-93

Document Type:

Article

Publication Date:

1/2024

Document Language:

English

Document ID (Org No.):

2001309733

pISSN:

2564-6605

winding

design

transformer

structural ad thermal analysis

flowsargı

dizayn

trafo

yapısal ve termal analiz

akış

Issues

Article Details

Authors: Beyza Nur Dursun | Bulent Ekici

Publisher: Nigde Omer Halisdemir University

Main Topics: Makine Mühendisliği (Diğer)

Journal: Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi Vol.13 Issue 1, pp.84-93

Document Type: Article

Publication Date: 1/2024

Document Language: English

Document ID (Org No.): 2001309733

pISSN: 2564-6605

Issues

Authors:

Beyza Nur Dursun | Bulent Ekici

Publisher:

Nigde Omer Halisdemir University

Main Topics:

Makine Mühendisliği (Diğer)

Journal:

Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi Vol.13 Issue 1, pp.84-93

Document Type:

Article

Publication Date:

1/2024

Document Language:

English

Document ID (Org No.):

2001309733

pISSN:

2564-6605