Bir şalter sistemi için termal analiz

Öz

Elektrik enerjisinin dağıtımı önemlidir. Özellikle güç iletim şebekelerinin yönetimi sırasında, birçok kritik sistem devreye girer ve önemli fonksiyonları yerine getirir. Bunlardan en önemlilerinden biri, anahtarlamalı mod olarak bilinen yüksek gerilim altında anahtarlama işlemidir. Bir şalter sisteminin (switchgear mekanizması) işlevini yerine getirirken karşılaştığı problemlerden biri de ısı birikmesidir. Termal sorunlara yol açabilecek bu problemlerden dolayı sınırlı hacim ve özel koşullar altında termal tasarımı inceleyerek tasarım hacmini incelemek zorunludur. Bu kapalı hacimde, bu elemanlar tarafından üretilen sıcaklık değerleri belirli noktalarda deneysel olarak ölçülmüş ve daha sonra bu değerler 3B sonlu hacim tabanlı CFD değerleri ile karşılaştırılmıştır. Bu karşılaştırma, tasarımın sıcaklık görünümü açısından CFD analiz değerlerine dayanabileceğini göstermektedir. Bu, maliyet minimizasyonu ve optimal sistem tasarımı yaklaşımı için değerli bir katkıdır.

Anahtar Kelimeler

• CFD analizi,taşınım ısı transferi,endüstriyel tasarım,şalter sistemi

A thermal analysis for a switchgear system

Öz

Distribution of electrical energy is important. Particularly during the management of power transmission networks, many critical systems enter the circuit and perform important functions. One of the most important of these is the high-voltage switching process, known as switch-mode operation. One of the problems that switching mechanism meets when performing its function is heat accumulation. It is imperative to examine the thermal design and consider design considerations under limited volume and special conditions. In this closed volume, the temperature values produced by these elements were experimentally measured at certain points and then these values were compared with the 3D finite volume based CFD determined values. This comparison demonstrates that the design could be based on CFD analysis values in terms of temperature appearance. This is a valuable contribution for cost minimization and optimal system design approach.

Anahtar Kelimeler

• CFD analysis,convection heat transfer,industrial design,switchgear

Kaynakça

1. Koch, D., SF6 Properties, and use in MV and HV Switchgear, Schneider Electric, Cahier Technique, No:188, (2003).
2. Webstore International Electrotechnical Commission, Standard IEC 62271:2017, https://webstore.iec.ch/publication/32982, (20.10.2017).
3. Kaufmann, B., Kudoke, M., and Groβmann, S., Experimental Verification of Convective Heat Transfer Computations for Gas Insulated Switchgear, IEEE Institute of Electrical and Electronics Engineers, (2013).
4. Kaltenborn, U., Dong, X., Dynamic Thermal Simulation of Gas Insulated Switchgear, CIRED 21st International Conference on Electricity Distribution, Germany, Paper 0495, (2011).
5. Singh, S., Summer, R., A Novel Approach for the Thermal Analysis of Air Insulated Switchgear, CIRED 21st International Conference on Electricity Distribution, Germany, Paper 0492, (2011).
6. Hao, F., Junmin, Z., Temperature Rise Comparison of Switchgear in SF6, N2, and Air, Telkomnika, 11, 3, 1377-1382, (2013).
7. Kitzrow, G., Wiebel, W., Rogler, R.D., Schoenemann, T., Studies on the Use of Heat Pipes in Medium Voltage Switchgears, 27th International Conference on Electrical Contacts, Germany, ISBN 978-3-8007-3624-9, (2014).
8. Cho, H. S., Park, S. W., A Study on the Heat Transfer Characteristics in Busbars with Various Shape and Arrangement for the Industrial switchgear with Various Shape and Arrangement for the Industrial Switchgear, Proceeding of the ASME 2014 International Mechanical Engineering Congress and Exposition IMECE2014, Canada, (2014).

9. Gramsch, C., Blaszczyk, A., Löbi, H., Grossmann, S., Thermal Network Method in the Design of Power Equipment, Scientific Computing in Electrical Engineering, Mathematic in Industry, Springer, 11, 213-219, (2007).
10. Fjeld, E., Rondeel, W., Vaagsaether, K., Saxegaard, M., Skryten, P., Attar, E., Thermal Design of Future Medium Voltage Switchgear, CIRED 23rd International Conference on Electricity Distribution, paper 1090, 2015.
11. Li, M., Li, X., Lin, J., Wang, L., Temperature Rise Characteristics Simulation of 40.5 kV High Current Cubicle Type Gas Insulated Switchgear, IEEE Institute of Electrical and Electronics Engineers , 616-619, (2017).
12. ANSYS R14.5, FLUENT in ANSYS Workbench User’s Guide, (2012).