Reactive power compensation using PSO controlled UPFC in a microgrid with a DFIG based WECS

This article represents the reactive power compensation issue with the help of FACTS controller and transient stability analysis in a Wind-Diesel hybrid power system. DFIG is widely used due to its simplicity and high efficiency in wind energy generation system. Back to back converters are employed in DFIG based Wind Energy Conversion System (WECS) with proper active and reactive power control strategy. Mathematical model of the proposed hybrid system with Unified Power Flow (UPFC) controller is developed to compensate the reactive power in the proposed system. The mathematical model of UPFC is employed for transient stability analysis of hybrid system with incorporation IEEE type 1 excitation system. The analysis of the proposed system is performed with varying loading conditions. A comparison based on simulation is then performed between PI controlled UPFC and PSO controlled UPFC.