Voltage quality control in wind turbine and flexible ac transmission system (facts)‎ devices in power systems by using static VAR compensation (SVC)‎

الملخص EN

:In recent years, wind turbines have become an acceptable alternative for electrical energy generation, because of the environmental and economic benefits of 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 characteristics determine 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 which explained through a case study of (16 x 750 kW) wind farm on a (30 kV) distribution feeder.The case that have been studied shows that possible voltage quality problems can managed to overcome them by selecting an appropriate wind turbine type and by adjusting wind turbine control parameters.The reactive power demand for the generator of wind turbines is compensated using uncontrollable capacitor banks 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 to grid with wind turbine of (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 (Vabc.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).

The results of controlled system used in our model in the case of variable wind speed with (fixed Var control, voltage regulation) showed that damping oscillating of voltage in the case of voltage regulation is best from the fixed Var control