International Journal of Engineering Research

P. Siva Gana Vara Prasad ¹, Amrutha Veena Chandrapati ², K. Navyata Yesodha Rao ¹, K. Lakshmi Prasanth ¹

Affiliations
1 Department of Electrical Electronics Engineering, St Ann‘s College of Engineering & Technology, Chirala, Prakasam (Dt), A.P, IN
2 Department of Electrical Electronics Engineering, Bapatla Engineering College, Bapatla, Guntur (Dt), A.P, IN

Abstract

This paper proposes fuzzy logic controller based a single-phase seven-level inverter for grid-connected photovoltaic systems, with a novel pulse width-modulation (PWM) control scheme. Three reference signals produces from fuzzy logic controller which are identical to each other are going to compare with the amplitude of the triangular carrier signal. The inverter is capable of producing seven levels( Vab = Vdc Vab = 2Vdc/3 Vab = Vdc/3 Vab = 0 Vab = −V dc/3 Vab = − 2Vdc/3 Vab = −V dc )of output-voltage levels from the dc supply voltage. The total harmonic distortion is reduces by this control strategy. The proposed system was verified through simulation.

Keywords

Fuzzy Logic Controller, Grid Connected, Modulation Index, Multilevel Inverter, Photovoltaic (PV) System, Pulse Width-Modulated (PWM), Total Harmonic Distortion (THD).

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