Abstract
Small-scale renewable energy systems are becoming increasingly popular due to soaring fuel prices and technological advancements that reduce the cost of manufacturing. Solar photovoltaic (PV) and wind turbine (WT) are the most common renewable sources used now. It is well known that these renewable energy sources are intermittent in nature, which impose a challenging to integrate them into the power grid. This paper aims to examine the dynamic behavior of the hybrid PV-WT model under different operating conditions, and the impact of the hybrid PV-WT on the system stability when a fault applied at a point of common coupling (PCC). In this paper, a model of grid connected PV/WT hybrid system is presented. It consists of PV, WT, induction generator, controller and converters. The model is implemented using MATLAB/SIMULINK. Perturb and Observe (P & O) algorithm is used for maximizing the output power from PV array. The fixed speed wind turbine with induction generator is used. This paper shows a good dynamic performance of hybrid PV-WT under different operating conditions. This system has minor impacts on power quality. The transient stability of this system is affected by hybrid PV-WT. The fault clearing time is improved with renewable sources, and become less critical than the system without renewable ones.
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