SEYED MOHAMMAD HASSAN HOSSEINI, SEYED MOHSEN ENJAVI MADAR, MEHDI VAKILIAN

Using the finite element method to calculate parameters for a detailed model of transformer winding for partial discharge research

Power transformers are considered to be one of the most essential and costly pieces of equipment in a power system. Identifying insulation faults in the shortest possible time prevents the occurrence of irreparable damage. Partial discharge (PD) is one of the most significant insulation faults. The first step in the study of PD is the precise modeling of transformer winding at high frequencies. In this paper, the finite element method is used to calculate the parameters for a detailed model of transformer winding. For this reason, a detailed model of transformer winding and the analytic formulations are first presented for the calculation of the parameters of the model. Using two-dimensional finite element methods, the 20-kV transformer winding is then simulated according to exact technical specifications and designed using Maxwell software. After that, the parameters for the detailed model presented in this paper are derived and calculated. Finally, the validity of the model in the frequency range is determined by applying a similar PD pulse on the real and simulated models.

Anahtar Kelimeler:

Partial discharge, power transformers, finite element analysis, detailed model

Using the finite element method to calculate parameters for a detailed model of transformer winding for partial discharge research

Keywords:

Partial discharge, power transformers, finite element analysis, detailed model,

PDF

___

L.E Lundgaard, “Acoustic partial discharge detection-fundamental considerations,” IEEE Electrical Insulation Magazine, Vol. 8, pp. 25–31, 1992.
M. Homaei, A. Mazhab Jafari, A. Akbari, “Investigating suitable features for partial discharge localization in power transformer,” International Conference on Condition Monitoring and Diagnosis, Beijing, China, pp. 923–926, 2008.
L. Yini, Z. Lixing, “A method to locate partial discharge based on the theory of sectional winding transfer functions,” Eighth International Conference on Electronic Measurement and Instruments, Xi’an, China, pp. 2-493–2-498, 2007.
A. Akbari, P. Werle, H. Borsi, E. Gockenbach, “Transfer function-based partial discharge localization in power transformers: a feasibility study,” IEEE Electrical Insulation Magazine, Vol. 18, pp. 22–33, 2002.
S.M.H. Hosseini, M. Vakilian, G.B. Gharepetian, “Comparison of transformer detailed models for fast and very fast transient studies,” IEEE Transactions on Power Delivery, Vol. 23, pp. 733–741, 2008.
G.B. Gharehpetian, H. Mohseni, K. Moller, “Hybrid modeling of inhomogeneous transformer windings for very fast transient overvoltage studies,” IEEE Transactions on Power Delivery, Vol. 13, pp. 157–163, 1998.
A.M. Jafari, A. Akbari, “Partial discharge localization in transformer windings using multi-conductor transmission line model,” Electric Power Systems Research, Vol. 78, pp. 1028–1037, 2008.
M. Popov, L. van der Sluis, R.P.P. Smeets, “Complete analysis of very fast transients in layer-type transformer windings,” International Conference on Power Systems Transients (IPST’07), Lyon, France, 2007.
D. Zhi-Ye, Z. Chun, R. Jiang-Jun, Y. Shi-Feng, Y. Wen-Bing, “Calculation of distribution parameters for research on propagation characteristic of PD in transformer winding,” Power and Engineering Conference, Asia-Pacific, 2009, pp. 1–5.
N. Bianchi, Electrical Machine Analysis Using Finite Elements, London, UK, Taylor & Francis, 2005.
V. M. Eslamian, B. Vahidi, S.H. Hosseinian, “Analytical calculation of detailed model parameters of cast resin dry-type transformers,” Energy Conversion and Management, Vol. 52, pp. 2565–2574, 2011.