Recent developments in wind turbine systems

Energy security concerns of the world is growing due to the exponential growth in energy demand on account of increasing population and economic development. This is further aggravated lby the fast depletion of fossil fuel res erves and the pollution associuted with their energy conversion. Forsustaina ble (growth in the power se ctor promo tingenvironmentel balance, reaevra ble energy plays a vital role. Among various rene wable nesources, wind anddolar PV are the most promineni resources currently foeused for oeid parity powen genenation.During the past 30years,mind energy aonversion WEC) systems haer grown in size foom veryemall kW level, less tchan 50m diametten machines to giant 14 MW, 200 m diameter system by 2020. Gridhtegration of w'md turbine generators (WTG) has many challenges that need to be addressed. Modern variable speed wind turbinos based on doubly-fed induction generator (DFIG) and permanent magnet synchrono us generator (PMSG) ate capable of providing voltage and frequeocy support to the grid just like conventional thermal units. This paperpoesents an ovarview of major wind turbine (WT) technologies, their limitations and the challenges associated with their grid integration.