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Reduction of the double-circuit flashovers on a 400 kV overhead line

A. Xemard ; EDF R&D France
J. Michaud ; EDF R&D France
F. Maciela ; EDF R&D France
T. Lassaigne ; RTE France
F. Sauvegrain ; RTE France
P. Auriol
J. G. Roumy ; Hydro-Québec IREQ Canada
O. Saad ; Hydro-Québec IREQ Canada
Q. Bui Van ; Hydro-Québec TransEnergie Canada
A. Dutil ; Hydro-Québec TransEnergie Canada

Sažetak

Double circuit flashovers may cause very severe system disturbances when taking place on
some critical double-circuit lines of an electrical network. Line arresters offer an efficient
solution to protect these specific lines against double circuit outages due to lightning.
This paper will study, on a double-circuit 400-kV line, the protection provided by line
arresters against double circuit outages due to lightning. The efficiency of several
configurations of line arresters will be compared. For that purpose, the double-circuit
lightning flashover rates of the line with and without line arresters will be calculated using a
newly developed software which includes a three-dimensional electro-geometric model and is
able to take into account the random nature of lightning. This software automatically launches
EMTP-RV (restructured version of EMTP) for analyzing fast front overvoltages impressed on
line insulation. The energy stressing the line arresters will also be calculated in order to
evaluate the risk of failure of the line arresters due to excess energy absorption.
Furthermore, the effects of several other parameters such as the tower footing resistances, the
lightning withstand voltages of insulator strings as well as the protective levels of line
arresters will also be investigated.

Ključne riječi

Lightning; flashover; energy duty; continuity of service; transient calculation; line surge arrester

Hrčak ID:

198494

URI

https://hrcak.srce.hr/198494

Datum izdavanja:

20.6.2017.

Posjeta: 997 *