Transient stability enhancement of variable speed wind turbine driven PMSG with rectifier-boost converter-inverter

The recent development of power electronic technology encourages to use variable speed wind turbine (VSWT) driving a doubly fed induction generator (DFIG), wound field synchronous generator (WFSG) or permanent magnet synchronous generator (PMSG) for wind power generation. Among those, stability analysis of DFIG type of VSWT has already been reported in many literatures. On the other hand, stability analysis of synchronous generator type of VSWT is not sufficient enough. This paper focuses on the transient stability analysis of variable speed wind turbine driving a PMSG (VSWT-PMSG). Suitable control strategies are developed for both wind turbine and frequency converter. Both symmetrical and unsymmetrical faults are considered as a network disturbance in the simulation analyses of the transient characteristics of the proposed system, which have been carried out using PSCAD/EMTDC.