Impulse voltage distribution on disk winding

Calculation of disk series capacitance using analytical method

Conference paper (2020)

Authors

M. Ghaffarian Niasar DC systems, Energy conversion & Storage - EEMCS
W. Zhao DC systems, Energy conversion & Storage - EEMCS
Research Group
DC systems, Energy conversion & Storage (EEMCS) (TU Delft)
Copyright: © 2020 M. Ghaffarian Niasar, W. Zhao
DOI: https://doi.org/10.1109/ICHVE49031.2020.9279969
Transformer Disk series capacitance Disk winding Lightning over voltage
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Published Date

2020

Language

English

Reuse Rights

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Research Group

DC systems, Energy conversion & Storage

Abstract

Nonlinear voltage distribution along the transformer winding during a lightning overvoltage can cause severe electric stress specially to the area of the winding close to the high voltage terminals. For high voltage transformers different methods such as interleaved winding, electrostatic shield wires, and wound-in shield wires are implemented on the first few disks to improve such nonlinear voltage distribution. Through application of those methods, the series capacitance of the first few disks is increased which results in reduction of electric stress on the highest stress region close to the high voltage terminal. In this paper disk series capacitances are calculated using the energy summation method and a simplified analytical formula is derived for different configuration of disk winding construction.

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09279969.pdf
(.pdf | 0.436 Mb)
09279969.pdf
(.pdf | 0.436 Mb)