Power Quality Improvements in Wind Diesel Hybrid Systems Using Bacteria Foraging Optimization Technique for Controller Parameter Optimization

The wind energy conversion systems when operate in weak grid or in isolated mode may cause power quality problems due to variation in wind speed and other circuit conditions. To improve the power quality of wind generation system a wind-diesel hybrid system is proposed in this paper. The power quality of the system is improved by controlling the excitation and input power of the synchronous generator. The PID controller is used in input power controller. A new optimization technique i.e. bacteria foraging optimization to optimize the PID controller gains is used to improve the power quality of the proposed system.