The recent availability of XLPE-insulated, 400 kV-50 Hz submarine cables, in single- or three-core construction, suggests to investigate the ac shore connection of GW-sized offshore wind-farm (OWF) clusters. The paper discusses some basic features of a 200 km long 400 kV-50 Hz cable system, connecting to the grid three large OWFs with 2 GW total capacity. After selecting suitable cables based on their active power transfer capacity, a shunt compensation plan for the resulting system is proposed, taking into account maximum exploitation of the longest cable stretch as well as no-load system operation. A simple but effective approximate algorithm for the optimal exploitation of the cable system by OWF voltage control is proposed; simulations show the viability of the interconnector and of the proposed algorithm for several different loading conditions. Results evidence good steady-state performances, with small reactive surplus and, notably, full-load losses not exceeding 3%.
EHV ac interconnection for a GW-size offshore wind-farm cluster: preliminary sizing / Lauria, Stefano; Schembari, Maddalena; F., Palone. - (2014), pp. 1-8. (Intervento presentato al convegno Energy Conference (ENERGYCON), 2014 IEEE International tenutosi a Dubrovnik (Croazia) nel 13-16 Maggio 2014) [10.1109/ENERGYCON.2014.6850453].
EHV ac interconnection for a GW-size offshore wind-farm cluster: preliminary sizing
LAURIA, Stefano;SCHEMBARI, MADDALENA;
2014
Abstract
The recent availability of XLPE-insulated, 400 kV-50 Hz submarine cables, in single- or three-core construction, suggests to investigate the ac shore connection of GW-sized offshore wind-farm (OWF) clusters. The paper discusses some basic features of a 200 km long 400 kV-50 Hz cable system, connecting to the grid three large OWFs with 2 GW total capacity. After selecting suitable cables based on their active power transfer capacity, a shunt compensation plan for the resulting system is proposed, taking into account maximum exploitation of the longest cable stretch as well as no-load system operation. A simple but effective approximate algorithm for the optimal exploitation of the cable system by OWF voltage control is proposed; simulations show the viability of the interconnector and of the proposed algorithm for several different loading conditions. Results evidence good steady-state performances, with small reactive surplus and, notably, full-load losses not exceeding 3%.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
