Staff Members - Benha University
New Techniques for Disconnector Switching VFT Mitigation in GIS
International Journal of Electrical and Computer Engineering (IJECE) • 2014
Publication Information
Authors
M. A. Abd-Allah, A Said and Ebrahim A Badran
Keywords
Not Available
Journal
International Journal of Electrical and Computer Engineering (IJECE)
Publisher
Not Available
Volume
4
Issue
2
Pages
179~192
publication.type
International
Paper Link
Not Available
Supplementary Materials
Not Available
Abstract
Switching operations in a Gas Insulated Substations (GIS) generate very fast
transient over voltages (VFTO) which are dangerous for the transformer and
the system insulation because of their short rise time. Under special
circumstances the overvoltages can arise close to the transformer Basic
Insulation Level (BIL). The reduction of VFTO amplitudes is considered
main challenges. Therefore, VFTO in the 220 kV Wadi-Hoff GIS is analyzed
and the worst case for disconnector switching is predicted using EMTP/ATP
in this paper. VFTO mitigation techniques are studied in this work.
Furthermore, proposed techniques are presented for mitigating the VFTO.
The proposed techniques can be used by the maintenance engineers,
transformer designers, and GIS insulation manufactures. The results show
that the proposed techniques highly reduce the VFTO in a simple manner
transient over voltages (VFTO) which are dangerous for the transformer and
the system insulation because of their short rise time. Under special
circumstances the overvoltages can arise close to the transformer Basic
Insulation Level (BIL). The reduction of VFTO amplitudes is considered
main challenges. Therefore, VFTO in the 220 kV Wadi-Hoff GIS is analyzed
and the worst case for disconnector switching is predicted using EMTP/ATP
in this paper. VFTO mitigation techniques are studied in this work.
Furthermore, proposed techniques are presented for mitigating the VFTO.
The proposed techniques can be used by the maintenance engineers,
transformer designers, and GIS insulation manufactures. The results show
that the proposed techniques highly reduce the VFTO in a simple manner