Mitigation of harmonics and inter-harmonics with LVRT and HVRT enhancement in grid-connected wind energy systems using genetic algorithm- optimized PWM and fuzzy adaptive PID control

The growing installed wind capacity over the last decade has led many energy regulators to define specific grid codes for generation systems connecting electricity grid. These requirements impose strict laws regarding Low Voltage Ride Though (LVRT) and High (HVRT) capabilities of turbines during voltage disturbances. main aim this paper is propose LVRT HVRT strategies that allow remain connected severe Power quality issues associated with harmonics inter-harmonics are also discussed a control scheme grid-side converter proposed make Wind Energy Conversion System insensitive external disturbances parametric variations. Selective Harmonic Elimination Pulse Width Modulation technique based on Genetic Algorithm optimization employed overcome over-modulation problems, reduce amplitudes harmonics, thus Total Distortion in current waveforms. Furthermore, compensate fluctuations speed due turbulence at blades turbine, fuzzy Proportional-Integral-Derivative controller adaptive gains generator side.