One-Dimensional Model for the Nonlinear Resistive Electric Field Control in Medium-Voltage Rotating Electrical Machines
Egorov, Dmitry; Pyrhönen, Juha (2021-04-15)
Post-print / Final draft
Egorov, Dmitry
Pyrhönen, Juha
15.04.2021
IEEE Transactions on Dielectrics and Electrical Insulation
IEEE
School of Energy Systems
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© Copyright 2021 IEEE
© Copyright 2021 IEEE
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe2021042010994
https://urn.fi/URN:NBN:fi-fe2021042010994
Tiivistelmä
This study provides an insight in the analytical estimation of the electric field along the surface of a stress grading system (SGS) in the end-winding region of an electrical machine. An analytical approach is derived for the field grading materials (FGMs) having power-law electric-field-dependent conductivity. Despite some limitations, the introduced model can be used for the preliminary analysis of SGS with specific geometric and dielectric parameters, both during sinus and pulsed voltage condition. The analytical considerations are verified with finite element simulations for 15 markedly different nonlinear FGMs, which were previously reported in the applications related to the medium voltage rotating electrical machines.
Lähdeviite
Egorov, D., Pyrhönen, J. (2021). One-Dimensional Model for the Nonlinear Resistive Electric Field Control in Medium-Voltage Rotating Electrical Machines. IEEE Transactions on Dielectrics and Electrical Insulation, vol. 28, no. 2. pp. 697-703. DOI: 10.1109/TDEI.2020.009307
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