Simulation and Analysis of Wind Energy and Photo Voltaic Hybrid System
R. Valarmathi1, S. Palaniswami2, N. Devarajan3
1R. Valarmathi, Department of ECE, Institute of Road and Transport Technology, Erode, India.
2Dr.P. Palaniswami, Department of EEE, Government College of Engineering, Barhur, India.
3Dr. N. Devarajan, Department of EEE, Government College of Technology, Coimbatore, India.
Manuscript received on April 15, 2012. | Revised Manuscript received on April 20, 2012. | Manuscript published on May 05, 2012. | PP: 193-200 | Volume-2 Issue-2, May 2012 . | Retrieval Number: B0547042212/2012©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: This paper models a hybrid system consisting of a wind turbine and a photovoltaic array as main energy sources and this is simulated using MATLAB. To connect the PV system to the grid the only adaptation required is to adjust the DC bus voltage to the conventional/isolated grids characteristics. Both energy sources are parallely linked to a common PWM voltage source inverter through individual AC/DC and DC/DC converters. A AC/DC converter transforms the 3 phase variable frequency wind turbine AC power, into variable DC power. A DC/DC converter controls variable power from the solar array DC. Though all sources have their individual controllers they have a common configuration. A VLSI based fuzzy logic controller ensures constant voltage needed for the load through the convertor’s PWM signals. The wind turbine and photovoltaic array voltage are controlled through error signal which is fed to the controller to generate pulses for the dc-dc converter. Simulation results reveal that the hybrid system provides a constant power to the load.
Keywords: Photovoltaic array, Wind turbine, VLSI, Fuzzy logic controller.