Flexible Ripple Minimization Technique for Wind-Solar Renewable Energy System Under Unbalanced and Distorted Grid Conditions

This article focusses on power quality issues related with the operation of a wind energy conversion system employing a doubly fed induction generator (DFIG), integrated with a solar photovoltaic array, under unbalanced, and distorted grid conditions. The multiple-order DFIG electromagnetic torque r...

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Bibliographic Details
Published in:IEEE transactions on industry applications Vol. 58; no. 5; pp. 6739 - 6751
Main Authors: Das, Souvik, Singh, Bhim
Format: Journal Article
Language:English
Published: New York IEEE 01.09.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Adaptive algorithms
Adaptive filters
Compensation
Distorted grid voltages
Doubly fed induction generators
doubly-fed induction generator (DFIG)
Electromagnetic induction
Energy conversion
flexible ripple minimization
Harmonic analysis
Higher harmonics
Induction generators
Minimization
Optimization
Power harmonic filters
Ripples
Rotors
solar photovoltaic (SPV) array
Stators
Unbalance
unbalanced grid voltages
Voltage control
Wind power
ISSN:0093-9994, 1939-9367
Online Access:Get full text
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Summary:This article focusses on power quality issues related with the operation of a wind energy conversion system employing a doubly fed induction generator (DFIG), integrated with a solar photovoltaic array, under unbalanced, and distorted grid conditions. The multiple-order DFIG electromagnetic torque ripples and grid active power ripples, resulting from the unbalanced and distorted grid, can be mitigated, however, at the cost of highly unbalanced and distorted currents. This article provides a possible solution towards a tradeoff by developing a flexible ripple minimization technique based on a cross-feedback extended second order generalized integrator for harmonics sequence separation (CextSOGI-HSS). The CextSOGI-HSS based current compensation enables a controlled minimization of ripple as per the customizable flexibility quotient. Furthermore, the current compensation technique employs an improved recursive least squares (IRLS) adaptive filtering algorithm for processing DFIG stator currents and local load currents. The IRLS algorithm improves grid currents harmonics spectra by filtering-out higher order harmonics from DFIG stator currents and nonlinear load currents, meanwhile, the effects of any load or stator currents unbalance on grid currents are also mitigated. Test results from a developed laboratory prototype confirm the efficacy of the presented flexible ripple minimization control technique.
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ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2022.3185565