Mitigating voltage quality issues in Sawla Substation, Ethiopia: A dynamic voltage restorer controlled by neural networks and fuzzy logic

Ensuring power quality in distribution systems is critical due to voltage sags, swells, and harmonic distortions, which affect system performance and equipment reliability. The Sawla distribution system in Ethiopia experiences high Total Harmonic Distortion (THD), exceeding IEEE Std 519–2014 limits...

Full description

Saved in:
Bibliographic Details
Main Authors: Balakumar Subramanian, Alazar Demamu, Andinet Anjamo, Muluneh Lemma, Yalisho Girma
Format: Article
Language:English
Published: Elsevier 2025-06-01
Series:Results in Engineering
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S2590123025011818
Tags: Add Tag
No Tags, Be the first to tag this record!
_version_ 1850276195429515264
author Balakumar Subramanian
Alazar Demamu
Andinet Anjamo
Muluneh Lemma
Yalisho Girma
author_facet Balakumar Subramanian
Alazar Demamu
Andinet Anjamo
Muluneh Lemma
Yalisho Girma
author_sort Balakumar Subramanian
collection DOAJ
description Ensuring power quality in distribution systems is critical due to voltage sags, swells, and harmonic distortions, which affect system performance and equipment reliability. The Sawla distribution system in Ethiopia experiences high Total Harmonic Distortion (THD), exceeding IEEE Std 519–2014 limits due to nonlinear loads at 15 KV. This study proposes an Artificial Neural Network (ANN) and Fuzzy Logic Controller (FLC)-based Dynamic Voltage Restorer (DVR) to mitigate voltage fluctuations. Using a Pulse Width Modulation (PWM) inverter and d-q transformation, the DVR dynamically compensates voltage variations. ANN-based control outperforms FLC, achieving THD reduction from 23.92 % to 4.94 %, while the FLC-controlled DVR achieves 12.63 % THD, which remains above IEEE limits. MATLAB/Simulink simulations confirm the DVR’s effectiveness in stabilizing voltage and reducing harmonic distortions. This approach enhances power quality and provides a scalable solution for distribution networks.
format Article
id doaj-art-dd0bda510eba48a4b2da61a8749a7b74
institution OA Journals
issn 2590-1230
language English
publishDate 2025-06-01
publisher Elsevier
record_format Article
series Results in Engineering
spelling doaj-art-dd0bda510eba48a4b2da61a8749a7b742025-08-20T01:50:22ZengElsevierResults in Engineering2590-12302025-06-012610510610.1016/j.rineng.2025.105106Mitigating voltage quality issues in Sawla Substation, Ethiopia: A dynamic voltage restorer controlled by neural networks and fuzzy logicBalakumar Subramanian0Alazar Demamu1Andinet Anjamo2Muluneh Lemma3Yalisho Girma4Corresponding author.; Faculty of Electrical and Computer Engineering, Arba Minch University, Arba Minch, EthiopiaFaculty of Electrical and Computer Engineering, Arba Minch University, Arba Minch, EthiopiaFaculty of Electrical and Computer Engineering, Arba Minch University, Arba Minch, EthiopiaFaculty of Electrical and Computer Engineering, Arba Minch University, Arba Minch, EthiopiaFaculty of Electrical and Computer Engineering, Arba Minch University, Arba Minch, EthiopiaEnsuring power quality in distribution systems is critical due to voltage sags, swells, and harmonic distortions, which affect system performance and equipment reliability. The Sawla distribution system in Ethiopia experiences high Total Harmonic Distortion (THD), exceeding IEEE Std 519–2014 limits due to nonlinear loads at 15 KV. This study proposes an Artificial Neural Network (ANN) and Fuzzy Logic Controller (FLC)-based Dynamic Voltage Restorer (DVR) to mitigate voltage fluctuations. Using a Pulse Width Modulation (PWM) inverter and d-q transformation, the DVR dynamically compensates voltage variations. ANN-based control outperforms FLC, achieving THD reduction from 23.92 % to 4.94 %, while the FLC-controlled DVR achieves 12.63 % THD, which remains above IEEE limits. MATLAB/Simulink simulations confirm the DVR’s effectiveness in stabilizing voltage and reducing harmonic distortions. This approach enhances power quality and provides a scalable solution for distribution networks.http://www.sciencedirect.com/science/article/pii/S2590123025011818Sawla distributionFuzzy logic controllerPoint of common coupling (PCC)Total harmonic distortionArtificial neural networkDynamic voltage restorer
spellingShingle Balakumar Subramanian
Alazar Demamu
Andinet Anjamo
Muluneh Lemma
Yalisho Girma
Mitigating voltage quality issues in Sawla Substation, Ethiopia: A dynamic voltage restorer controlled by neural networks and fuzzy logic
Results in Engineering
Sawla distribution
Fuzzy logic controller
Point of common coupling (PCC)
Total harmonic distortion
Artificial neural network
Dynamic voltage restorer
title Mitigating voltage quality issues in Sawla Substation, Ethiopia: A dynamic voltage restorer controlled by neural networks and fuzzy logic
title_full Mitigating voltage quality issues in Sawla Substation, Ethiopia: A dynamic voltage restorer controlled by neural networks and fuzzy logic
title_fullStr Mitigating voltage quality issues in Sawla Substation, Ethiopia: A dynamic voltage restorer controlled by neural networks and fuzzy logic
title_full_unstemmed Mitigating voltage quality issues in Sawla Substation, Ethiopia: A dynamic voltage restorer controlled by neural networks and fuzzy logic
title_short Mitigating voltage quality issues in Sawla Substation, Ethiopia: A dynamic voltage restorer controlled by neural networks and fuzzy logic
title_sort mitigating voltage quality issues in sawla substation ethiopia a dynamic voltage restorer controlled by neural networks and fuzzy logic
topic Sawla distribution
Fuzzy logic controller
Point of common coupling (PCC)
Total harmonic distortion
Artificial neural network
Dynamic voltage restorer
url http://www.sciencedirect.com/science/article/pii/S2590123025011818
work_keys_str_mv AT balakumarsubramanian mitigatingvoltagequalityissuesinsawlasubstationethiopiaadynamicvoltagerestorercontrolledbyneuralnetworksandfuzzylogic
AT alazardemamu mitigatingvoltagequalityissuesinsawlasubstationethiopiaadynamicvoltagerestorercontrolledbyneuralnetworksandfuzzylogic
AT andinetanjamo mitigatingvoltagequalityissuesinsawlasubstationethiopiaadynamicvoltagerestorercontrolledbyneuralnetworksandfuzzylogic
AT mulunehlemma mitigatingvoltagequalityissuesinsawlasubstationethiopiaadynamicvoltagerestorercontrolledbyneuralnetworksandfuzzylogic
AT yalishogirma mitigatingvoltagequalityissuesinsawlasubstationethiopiaadynamicvoltagerestorercontrolledbyneuralnetworksandfuzzylogic