Figure 1 . Test System
2.1 Type 1 WECS
Type 1 WECS is based on the squirrel cage induction generator (SCIG). In
this study, each SCIG is rated at 2.3MW and in order to achieve an
approximately 9MW capacity windfarm, 4 WECSs are considered operational.
Fig. 2 shows the general schematic of Type 1 WECS. A simple 4 staged
resistive starter [20] has been used to limit the inrush currents
associated during their synchronization to the system. Parameters of the
SCIG are obtained in [21].