POWER QUALITY IMPROVEMENT IN SOLAR FED CASCADED MULTILEVEL INVERTER USING ANFIS CONTROLLER
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Abstract
The presence of harmonics in solar Photo Voltaic (PV) energy conversion system results in
deterioration of power quality. To address such issue, our paper aims to investigate the
elimination of harmonics in a solar fed cascaded fifteen level inverter with aid of
Proportional Integral (PI), Artificial Neural Network (ANN) and Fuzzy Logic (FL) based
controllers. Unlike other techniques, the proposed ANFIS based approach helps in obtaining
reduced harmonic distortions that intend to an enhancement in power quality. This paper
also proposed to provide output voltage regulation in terms of maintaining voltage and
frequency at the inverter output end in compatible with the grid connection requirements. The
simulations are performed in the MATLAB Simulink environment for solar fed cascaded 15
level inverter incorporating ANFIS based controllers. To exhibit the proposed technique, a
photovoltaic plant coupled to multilevel inverter is designed and hardware is demonstrated.
All the three techniques are experimentally investigated with the measurement of power
quality metrics along with establishing output voltage regulation.
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