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Electronics 2018, 7(7), 111; https://doi.org/10.3390/electronics7070111

Novel Neural Control of Single-Phase Grid-Tied Multilevel Inverters for Better Harmonics Reduction

1
Department of Electrical Engineering and Computer Science, Texas A&M University-Kingsville, Kingsville, TX 78363, USA
2
Department of Electrical and Computer Engineering, The University of Alabama, Tuscaloosa, AL 35401, USA
*
Author to whom correspondence should be addressed.
Received: 11 June 2018 / Revised: 2 July 2018 / Accepted: 10 July 2018 / Published: 12 July 2018
(This article belongs to the Special Issue Power Quality in Smart Grids)

Abstract

A single-phase Cascaded H-Bridge (CHB) grid-tied multilevel inverter is introduced with a detailed discussion of the proposed novel neural controller for better efficiency and power quality in the integration of renewable sources. An LCL (inductor-capacitor-inductor) filter is used in the multilevel inverter system to achieve better harmonic attenuation. The proposed Neural Network (NN) controller performs the inner current control and tracks the references generated from the outer loop to satisfy the requirements of voltage or power control. Two multicarrier-based Pulse Width Modulation (PWM) techniques (phase-shifted modulation and level-shifted modulation) are adopted in the development of the simulation model to drive the multilevel inverter system for the evaluation of the neural control technique. Simulations are carried out to demonstrate the effectiveness and efficient outcomes of the proposed neural network controller for grid-tied multilevel inverters. The advantages of the proposed neural control include a faster response speed and fewer oscillations compared with the conventional Proportional Integral (PI) controller based vector control strategy. In particular, the neural network control technique provides better harmonics reduction ability. View Full-Text
Keywords: neural control; neural network controller; cascaded H-bridge; grid-tied multilevel inverter; LCL filter; phase-shifted modulation; level-shifted modulation; PI controller; total harmonic distortion; renewable sources neural control; neural network controller; cascaded H-bridge; grid-tied multilevel inverter; LCL filter; phase-shifted modulation; level-shifted modulation; PI controller; total harmonic distortion; renewable sources
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Fu, X.; Li, S.; Hadi, A.A.; Challoo, R. Novel Neural Control of Single-Phase Grid-Tied Multilevel Inverters for Better Harmonics Reduction. Electronics 2018, 7, 111.

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