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Power Quality Issues

Increasing size of wind farm connected to grid will lead to various challenges such as power quality and reactive power control during normal operation and fault ride through capability during fault conditions.  Considering  the  challenges to be faced related to interfacing of large wind farms using Induction generators, it is necessary to study the various power quality, stability and reactive power requirement of large-scale wind farm connected to grid and provide cost effective solution for management of power quality and reactive power. Power quality problems such as voltage sag, swell, under voltage, over voltage along with rotor stability issues are some major concern. In this paper all issues are analysed. Wind turbine connected     to squirrel cage induction generator is modelled using PSCAD simulation software to analyse the said issues where STATCOM is introduced as an active voltage and reactive power supporter to increase the power system stability. STATCOM unit is developed to inject reactive power for mitigation of power quality problems and to get stable grid operation.