International Journal of Engineering Research in Electrical and Electronic Engineering (IJEREEE)

Power Quality Enhancement by Reduction of Harmoins using Fuzzy Logic

Author : G.Nageswara Rao ¹ K.Murali Krishna Raju ²

Date of Publication :7th October 2016

Abstract: In today’s commercial world, multilevel inverters is playing a significant role from power failure. Harmonics is a major problem in power systems that have become serious recently owing to the wide use of power electronics related equipment. In this process, there is a possibility of generation of harmonic peaks because majority of the power utilities are non-linear loads. A high performance multilevel inverter should have a clean output voltage with low total harmonic distortion (THD) for both linear and non linear loads. Harmonic distortion is the most important power quality problem occurring in multilevel inverter, the harmonics can be eliminated by an optimal selection of switching angles. A hybrid evaluation technique evaluates the obtained optimal switching angles that are attained from the fuzzy inference system as well as neural network. The proposed technique is tested with a seven level cascaded H-bridge inverter. The proposed method will be implemented in MATLAB working platform and the harmonic elimination performance will be evaluated.

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