Power Quality Improvement in Isolated Wind-Diesel Power System

Copyright © 2017 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution License 4.0Power quality related disturbances in electrical distribution networks have become a major concern for both network managers and operators associated with the continuous increase of renewable energy resources worldwide. Such disturbances can cause momentary voltage sags and spikes, current distortions and fluctuations in the frequency that directly impact on the efficiency and performance of the electric equipment. This paper proposes a control strategy of a shunt active power filter (SAPF) to enhance the power quality in terms of harmonics and reactive power compensation in a standalone wind-diesel power system. The control of the SAPF is based on the indirect current control (ICC) strategy combining two proportional-integral (PI) controllers with a fuzzy logic controller. The system model is developed under MATLAB/SIMULINK environment and the proposed control scheme is evaluated under varying wind dynamics, linear balanced, unbalanced and non-Linear balanced load conditions.Peer reviewe

Fuzzy Control of a Three-Phase Shunt Active Filter for Harmonic Current Compensation in Wind-Diesel Standalone System

Mohamed AbdeldjabbarKouadria, TayebAllaoui, and Mouloud Denai, “Fuzzy Control of a Three-Phase Shunt Active Filter for Harmonic Current Compensation in Wind-Diesel Standalone System”, U.P.B. Sci. Bull., Series C, Vol. 78 (4), 2016.This paper presents the design of a fuzzy controller for a three-phase shunt active filter integrated in wind-diesel power system equipped with a wind turbine driving an induction generator. The goal for this controller is to maintain a good power quality under varying wind and load conditions. On the other hand, the controller should show acceptable closed-loop performance including stability and robustness. Active power filters as solutions to power quality problems have become more and more important nowadays. The modeling of the wind-diesel standalone system with control algorithm of the shunt active power filter (SAPF) to compensate the current harmonics and the power factor of nonlinear load is considered. A threephase voltage source bridge inverter with a DC bus capacitor is used as an active filter.Peer reviewe

A hybrid fuzzy sliding-mode control for a three-phase shunt active power filter

This document is the Accepted Manuscript version of the following article: Mohamed Abdeldjabbar Kouadria, Tayeb Allaoui, and Mouloud Denai, ‘A hybrid fuzzy sliding-mode control for a three-phase shunt active power filter’, Energy Systems, Vol. 8 (2): 297-308, March 2016. The final publication is available at Springer via http://dx.doi.org/10.1007/s12667-016-0198-4.This paper describes the hybrid fuzzy sliding-mode control (HFSMC) for a three phase shunt active shunt filter for the power quality improvement. The Power Quality (PQ) problems in power distribution systems are not new but only recently the effects of these problems have gained public awareness. These non-linear loads are constructed by nonlinear devices in which the current is not proportional to the applied voltage. For the harmonic elimination different methods are used, but in this paper a novel fuzzy logic controller for a three-phase shunt active power filter for the power quality improvement such as reactive power and harmonic current compensation generated due to nonlinear loads. The hybrid fuzzy sliding-mode control (HFSMC) approach is proposed such that it can be applied with advantages to both fuzzy and sliding-mode controller. Simulation results are presented to demonstrate the effectiveness of the control strategy. The results are found to be quite satisfactory to mitigate harmonic distortions, reactive power compensation and power quality improvement.Peer reviewedFinal Accepted Versio

High Performance Shunt Active Power Filter Design Based on Fuzzy Interval Type-2 Control Strategies

Mohamed Abdeldjabbar Kouadria, Tayeb Allaoui, and Mouloud Denaï, 'High Performance Shunt Active Power Filter Design Based on Fuzzy Interval Type-2 Control Strategies', International Review of Automatic Control, Vol. 8 (5), September 2015, doi: https://doi.org/10.15866/ireaco.v8i5.6096. Copyright © 2015 Praise Worthy Prize S.r.l. - All rights reserved.Shunt active power filters (SAPF) have been proved efficient to compensate for current harmonics in distribution grids. This paper deals with the design of high-performance control strategies for a three-phase SAPF to enhance the power quality and improve the DC link voltage regulation of the distribution network. Three fuzzy control methods, Type-1 and Interval Type-2 fuzzy logic controllers (T1FLC and IT2FLC) and interval Type-2 hybrid fuzzy logic controller (IT2HFLC) are considered. The performances of these controllers are evaluated in terms of harmonic mitigation and DC link voltage regulation under different operating conditions of the power system. The simulation study has been performed under MATLAB/SIMULINK and the results demonstrate that IT2HFLC is very effective in improving the power quality and very robust against parameter variations in the system.Peer reviewe