Analysis of electronic circuit transformer with experimental and finite elements

Öz

Transformers, one of the most important elements of energy transmission and distribution systems, can be produced as a result of high cost and long-term studies. It is necessary to know the mechanical, electrical and magnetic properties of a transformer in the manufacturing process. Modeling of the transformers to be designed with a reliable simulation program in order to operate at targeted values and efficiency is important in terms of ensuring test criteria and minimizing the problems that may arise later. Thanks to advanced computer techniques, it is possible to identify design errors and correct them through a simulation program. In this paper, ANSYS Maxwell 3D software based on Finite Element Method (FEM) and widely used in transformer simulation was used. With this program, it is aimed to investigate the magnetic field density, magnetic field intensity, magnetic flux lines, current density values in the coil and core of the transformer and the effects of these values on transformer losses. Considering the nominal values of the single phase 90 VA transformer, its electrical and physical values were measured by experimental studies in the laboratory environment, and the necessary parameters and values were calculated based on these measurements. The theoretically calculated values are compared with the experimental study results and the values calculated with ANSYS Maxwell program. It was observed that the experimental study results and the results of the model created in the program confirmed each other.

Anahtar Kelimeler

• Transformer
• FEM
• Magnetic flux

Kaynakça

1. Rao, Y., Structural Modeling of A Three Phase Core Type Transformer Using ANSYS Maxwell 3D, 2016. Internatıonal Journal of Innovatıve Research In Electrıcal, Electronıcs, Instrumentatıon And Control Engıneerıng, 4:4, 17-20.
2. Sharifian, M.B.B., Esmaeilzadeh, R., Farrokhifar, 2008. Computation of a single-phase shell-type transformer windings forces caused by ınrush and short-circuit currents, Journal of Computer Science, 4:1, 51-58.
3. Orosz, T., Kleizer, G., Iváncsy T., Tamus, Z. Á. 2016. Comparison of methods for calculation of core-form power transformer’s core temperature rise, Periodica Polytechnica Electrical Engineering and Computer Science, 60:2, 88-95
4. Chitaliya, G. H., Joshi, S. K., 2013. Finite element method for designing and analysis of the transformer – a retrospective, Proc. of Int. Conf. on Recent Trends in Power, Control and Instrumentation Engineering, 54-58.
5. Yusoff, N. A. M., Karim, K. A., Ghani, S. A., Sutikno, Jidin, T. A., 2015. Multiphase transformer modelling using finite element method, International Journal of Power Electronics and Drive System (IJPEDS), 6:1, 56-64.
6. Dawood, K., Cınar, M. A., Alboyacı, B., Sonmez, O. 2017. Efficient finite element models for calculation of the no-load losses of the transformer, International Journal of Engineering & Applied Sciences (IJEAS), 9:3, 11-21.
7. M. Lee, H. A. Abdullah, J. C. Jofriet, D. Patel, 2010. Thermal modeling of disc-type winding for ventilated dry-type transformers. Electric Power Systems Research, 80, 121–129.
8. Soh T. L. G, Said D. M, Ahmad N, Nor K. M, Salim F 2013. Experimental study on the impact of harmonics on transformer. IEEE 7th International Power Engineering and Optimization Conference (PEOCO), 686-690.

9. Nageswara Rao, M., Malay Mandal 2011. Impact of Harmonics, Estimation of Losses and Life expectanc & Mitigation of ill effects. https://www.academia.edu/6676494/Distribution_Transformer_Impact_of_Harmonics_IEEE_Format_2. Erişim tarihi (10.10.2017)
10. Sadati, S.B., Tahani, A., Jafari, M., Dargahi, M., 2008. Derating of Transformers under Non-sinusoidal Loads. in: 11th International Conferenec on Optimization of Electrical and Electronic Equipment, OPTIM, 263-268.
11. Teke, I. H., Özüpak, Y. and Mamiş, M. S. 2019. Electromagnetic Field and Total Loss Analysis of Transformers by Finite Element Method. International Journal of Engineering and Computer Science. 8(01), 24451–24460.
12. IEEE, 2006-2007. Standard for standard general requirements for liquid-immersed distribution, power, and regulating transformers. IEEE Std C57.12.00
13. Ryder, S. A., Vaughan, I. J. 2004. A simple method for calculating core temperature rise in power transformers. IEEE Transactions on Power Delivery. 19(2), 637–642.
14. Del Vecchio, R. M., Poulin, B., Feghali, P. T., Shah, D. M., Ahuja, R. 2001. Transformer design principles with applications to core-form power transformers. CRC Press.
15. Tenyenhuis, E. G., Girgis, R. S., Mechler, G. F., Zhou, G, 2002. Calculation core hot-spot temperature in power and distribution transformers. IEEE Transactions on Power Delivery. 17(4), 991–995.
16. Özüpak Y, Mamis M. S 2019. Realization of electromagnetic flux and thermal analyses of transformers by finite element method. IEEJ Transactions on Electrical and Electronic Engineering, 14(10), 1478-1484.
17. K.T. Muthanna, A. Sarkar, K. Das, K. Waldner 2006. Transformer Insulation Life Assessment. IEEE Trans, Power Deliv. 21150 – 156.