VOLTAGE QUALITY CONTROL IN WIND TURBINE AND FLEXIBLE AC TRANSMISSION SYSTEM (FACTS) DEVICES IN POWER SYSTEMS BY USING STATIC VAR COMPENSATION (SVC)

Abstract

In recent years, wind turbines have become an acceptable alternative for electrical energy generation, because of the environmental and economic benefitsof it. Much research remains to improve wind turbines behavior and make them more reliable and profitable. The reason for study application of wind turbine power quality characteristicsdetermine the impact of wind turbines on voltage quality. This paper gives a brief description of the impact that wind turbines may have on the voltage quality whichexplained through a case studyof(16 x 750 kW)wind farm on a (30 kV)distribution feeder.The case that have been studied shows thatpossible voltage quality problems can managed to overcome themby selecting an appropriate wind turbine type andby adjusting wind turbine control parameters.The reactive power demand forthe generator of windturbines is compensated using uncontrollable capacitorbanks and control Static Var Compensation (SVC) in flexible ac transmission system (FACTS) devices. This paper utilized the MATLAB/SIMULINK software in the modeling of such a wind squirrel-cage induction generator with grid in power system in two cases,fixed speed with directly grid connected squirrel-cage induction generator and variable speed with squirrel-cage induction generator. This model allows for the addition of wind energy generators togrid with wind turbineof (12 MW).The results obtained from our model in the case of constant wind speed using SVC showed the improvement in the value of Bas-Bar2(V_abc.B.B2)from (0.9 p.u) to (1 p.u) and reducing the reactive power value of Bas-Bar2 (Q._.B.B2) from (8 Mvar) to (2 Mvar).