Power Quality Improvement of Load Connected Grid Interfaced Inverter by Using FLC Merged Cascaded Current–Voltage Control Technique

International Journal of Electrical and Electronics Engineering

© 2014 by SSRG - IJEEE Journal

Volume 1 Issue 9

Year of Publication : 2014

Authors : K.Jaganmohangoud , P.Varaprasada Reddy

10.14445/23488379/IJEEE-V1I9P101

How to Cite?

K.Jaganmohangoud , P.Varaprasada Reddy, "Power Quality Improvement of Load Connected Grid Interfaced Inverter by Using FLC Merged Cascaded Current–Voltage Control Technique," SSRG International Journal of Electrical and Electronics Engineering, vol. 1,  no. 9, pp. 1-4, 2014. Crossref, https://doi.org/10.14445/23488379/IJEEE-V1I9P101

Abstract:

This paper proposes wind energy generation utilization and its grid penetration in electrical grid is popular in world wide. The voltage control strategy is proposed for inverters to simultaneously improve the power quality of the inverter local load voltage and the current exchanged with the grid. And also it enables seamless transfer of the operation mode from stand-alone to grid-connected or vice versa. Fuzzy control scheme includes an inner voltage loop and an outer current loop with both controllers designed by using Fuzzy logic control (FLC) and H∞ repetitive control strategy. It leads to a very low THD in both the inverter local load voltage and the current exchanged with the grid at the same time. The proposed control strategy can be used to single-phase inverters and three-phase four-wire inverters. It enables grid-connected inverters to inject balanced clean currents to the grid even when the local loads (if any) are unbalanced and/or nonlinear. Simulation under different scenarios, with comparisons made to the current repetitive controller replaced with a current proportional–resonant controller, is presented to demonstrate the excellent performance of the proposed strategy.

Keywords:

Harmonics, Power quality, FLC.

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