ABSTRACT
This chapter deals with the fault ride-through capability and mitigation of power fluctuations of variable-speed wind generator systems, especially for the doubly fed induction generator (DFIG), wound field synchronous generator, permanent magnet synchronous generator (PMSG), and synchronous reluctance generator systems. It discusses a ride-through technique for PMSG wind turbine systems using an energy storage system. The chapter describes the fault ride-through capability of DFIG, wound field synchronous generator, permanent magnet synchronous generator, and synchronous reluctance wind generator systems during grid fault events. It explores the variable-speed wind turbine based on a multipole, wound field synchronous generator. DFIGs are the most common technology used in variable-speed wind turbines, having 45% of the medium to large wind turbines installed in Europe in 2005. The chapter provides insight and understanding about the effective fault ride-through capability of DFIGs in weak transmission networks and their effects on system stability.
