Renewable Energy Resources: Solar Energy

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Recommended: solar energy the ultimate renewable resource

Solar energy is a fast growing energy resource among the renewable energy resources in the market and potential for solar power is huge to contribute towards the power demand almost in all the countries. The solar irradiation and temperature are mainly depends on the output power produced from the PV conversion process. Hence the maximum power point of PV array is tracked to maximize the efficiency of Photovoltaic system. Maximum power point tracking (MPPT) control system in general is taking care of extraction of maximum power from the sun light. In this paper, a novel MPPT algorithm using hill climbing method and fuzzy system is presented to ensure the maximum MPPT efficiency in order to ensure the maximum power across the inverter terminals. Due to the reduction in the number of switches in the proposed inverter, it reduces the switching losses. Thus the proposed inverter become a new sufficient solution for many applications like automotive electronics, PV systems, solar home applications and other power supply systems. Here in this paper, intelligent control method uses a Fuzzy Logic Controller applied to a DC-AC converter device. The effectiveness of proposed algorithm is validated by simulation using Matlab/Simulink. The result shows that the fuzzy logic controller exhibits a better performance compared to that of conventional method and hardware implementation of open loop system also presented. INTRODUCTION The inevitable costs of using fossil fuels to generate electricity have led to attracting lots of interests to the green energy sources recently. Among these green energy sources the solar energy may be the most important one because it is available almost everywhere unlike wind, geothermal, sea waves, etc. Due to h... ... middle of paper ... ... Fig.15 Total Harmonic Distortion TABLE.1 Comparison of Simulation and Hardware Results for open loop system System Output voltage (Volts) Power (Watts) THD (%) Simulation-open loop 60V 186W 13.40% Hardware-open loop 58.8V 159.6W 9.9% CONCULSION From the above simulation outcome, we assure that output power of solar panel is increased by using fuzzy based maximum power point technique when compared to the conventional method in MPPT algorithm. A PV interfaced fuzzy based MPPT controller with boost inverter is implemented in this paper, to convert dc input voltage into greater output ac voltage by using PWM techniques and is connected to load. The proposed topology has several desirable features such as low cost and compact size as number of switches used, increase in power, are limited to four as against six switches used in classical two-stage inverters.

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