Simulation of Switching and Lightning Transients in Parallel Single-Core Underground Cables
Conference: UPEC 2011 - 46th International Universities' Power Engineering Conference
09/05/2011 - 09/08/2011 at Soest, Germany
Proceedings: UPEC 2011
Pages: 6Language: englishTyp: PDFPersonal VDE Members are entitled to a 10% discount on this title
Kaloudas, Ch. G.; Papadopoulos, T. A.; Gouramanis, K. V.; Papagiannis, G. K. (Power Systems Laboratory, Aristotle University of Thessaloniki, Greece)
Stasinos, K. (Rokas Renewables, C. Rokas Group, Athens, Greece)
Switching and lightning transients in single core cables lead to overvoltages along cable cores and also to induced overvoltages on sheaths. The stress on cable insulation is in these cases significant. Sheaths are usually grounded at cable terminals with small grounding resistances. Sheath grounding can be also applied at sheath cross bonding points along cables and most commonly using sheath voltage limiters, which are energized during transients. This paper focuses on the examination of the overvoltages that may appear in an existing installation of nine medium voltage, single core cables connecting a wind park with the transmission grid. The influence of sheath cross bonding and the use of proper ground resistances are investigated using the ATP/EMTP simulation software.