Performance Analysis of Grid connected PV/Wind Hybrid Power System during Variations of Environmental Conditions and Load

Ahmed Mohammed Ahmed Ibrahim, Omar Noureldeen

Abstract


This survey investigates a dynamic modeling, simulation and control of Photovoltaic (PV)-wind hybrid system connected to electrical grid, considering changes of environmental conditions. In addition, the daily variations of critical load power are considered. The studied hybrid system consists of two Photovoltaic (PV) stations placed at different locations and one wind farm are integrated into main AC bus to enhance the system effectiveness. The PV/wind hybrid system feeds large plant with critical variable loads and electrical utility grid. The technique of extracting maximum power point is applied for both photovoltaic stations and wind farm to capture maximum power under varying climatic conditions. Modeling and simulation of the studied hybrid system is performed using matlab-Simulink software. The reliability of the studied hybrid system is analyzed under various operating conditions such as changes of solar irradiation and wind speed.  Control strategy for power flow is proposed to supply critical load demand of plant. The simulation results show that when the injected power from hybrid system is larger than critical load power, the excess power will be injected to electrical grid.  Otherwise, when injected power is lower than critical power demand, electrical utility grid in cooperated with hybrid power system will supply the critical load power. In addition, when the injected power from hybrid system is unavailable, load demand is entirely fed by electrical utility.

Keywords


PV; wind; hybrid system; MPPT control; DFIG; Load.

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DOI (PDF): https://doi.org/10.20508/ijrer.v8i1.6702.g7347

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