TY - GEN
T1 - Impulse voltage distribution on disk winding
T2 - Calculation of disk series capacitance using analytical method
AU - Ghaffarian Niasar, M.
AU - Zhao, W.
PY - 2020
Y1 - 2020
N2 - 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.
AB - 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.
KW - disk series capacitance
KW - disk winding
KW - lightning over voltage
KW - transformer
UR - http://www.scopus.com/inward/record.url?scp=85099405292&partnerID=8YFLogxK
U2 - 10.1109/ICHVE49031.2020.9279969
DO - 10.1109/ICHVE49031.2020.9279969
M3 - Conference contribution
T3 - 7th IEEE International Conference on High Voltage Engineering and Application, ICHVE 2020 - Proceedings
BT - 7th IEEE International Conference on High Voltage Engineering and Application, ICHVE 2020 - Proceedings
PB - IEEE
ER -