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Decentralized Virtual Impedance Control for Power Sharing and Voltage Regulation in Islanded Mode with Minimized Circulating Current

In islanded operation, precise power sharing is an immensely critical challenge when there are different line impedance values among the different-rated inverters connected to the same electrical network. Issues in power sharing and voltage compensation at the point of common coupling, as well as th...

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Main Authors: Khan, Mubashir Hayat, Zulkifli, Shamsul Aizam, Tutkun, Nedim, Ekmekci, Ismail, Burgio, Alessandro
Format: Article
Language:English
Published: Mdpi 2024
Subjects:
TK Electrical engineering. Electronics Nuclear engineering
Online Access:http://eprints.uthm.edu.my/12390/1/J17852_b092df39ad0432d3ff5b650742ce2f77.pdf
http://eprints.uthm.edu.my/12390/
https://doi.org/10.3390/electronics13112142
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spelling my.uthm.eprints.123902025-02-24T08:25:33Z http://eprints.uthm.edu.my/12390/ Decentralized Virtual Impedance Control for Power Sharing and Voltage Regulation in Islanded Mode with Minimized Circulating Current Khan, Mubashir Hayat Zulkifli, Shamsul Aizam Tutkun, Nedim Ekmekci, Ismail Burgio, Alessandro TK Electrical engineering. Electronics Nuclear engineering In islanded operation, precise power sharing is an immensely critical challenge when there are different line impedance values among the different-rated inverters connected to the same electrical network. Issues in power sharing and voltage compensation at the point of common coupling, as well as the reverse circulating current between inverters, are problems in existing control strategies for parallel-connected inverters if mismatched line impedances are not addressed. Therefore, this study aims to develop an improved decentralized controller for good power sharing with voltage compensation using the predictive control scheme and circulating current minimization between the inverters’ current flow. The controller was developed based on adaptive virtual impedance (AVI) control, combined with finite control set–model predictive control (FCS-MPC). The AVI was used for the generation of reference voltage, which responded to the parameters from the virtual impedance loop control to be the input to the FCS-MPC for a faster tracking response and to have minimum tracking error for better pulse-width modulation generation in the space-vector form. As a result, the circulating current was maintained at below 5% and the inverters were able to share an equal power based on the load required. At the end, the performance of the AVI-based control scheme was compared with those of the conventional and static-virtual-impedance-based methods, which have also been tested in simulation using MATLAB/Simulink software 2021a version. The comparison results show that the AVI FCS MPC give 5% error compared to SVI at 10% and conventional PI at 20%, in which AVI is able to minimize the circulating current when mismatch impedance is applied to the DGs. Mdpi 2024 Article PeerReviewed text en http://eprints.uthm.edu.my/12390/1/J17852_b092df39ad0432d3ff5b650742ce2f77.pdf Khan, Mubashir Hayat and Zulkifli, Shamsul Aizam and Tutkun, Nedim and Ekmekci, Ismail and Burgio, Alessandro (2024) Decentralized Virtual Impedance Control for Power Sharing and Voltage Regulation in Islanded Mode with Minimized Circulating Current. Electronics, 13 (2142). pp. 1-20. https://doi.org/10.3390/electronics13112142
institution Universiti Tun Hussein Onn Malaysia
building UTHM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tun Hussein Onn Malaysia
content_source UTHM Institutional Repository
url_provider http://eprints.uthm.edu.my/
language English
topic TK Electrical engineering. Electronics Nuclear engineering
spellingShingle TK Electrical engineering. Electronics Nuclear engineering
Khan, Mubashir Hayat
Zulkifli, Shamsul Aizam
Tutkun, Nedim
Ekmekci, Ismail
Burgio, Alessandro
Decentralized Virtual Impedance Control for Power Sharing and Voltage Regulation in Islanded Mode with Minimized Circulating Current
description In islanded operation, precise power sharing is an immensely critical challenge when there are different line impedance values among the different-rated inverters connected to the same electrical network. Issues in power sharing and voltage compensation at the point of common coupling, as well as the reverse circulating current between inverters, are problems in existing control strategies for parallel-connected inverters if mismatched line impedances are not addressed. Therefore, this study aims to develop an improved decentralized controller for good power sharing with voltage compensation using the predictive control scheme and circulating current minimization between the inverters’ current flow. The controller was developed based on adaptive virtual impedance (AVI) control, combined with finite control set–model predictive control (FCS-MPC). The AVI was used for the generation of reference voltage, which responded to the parameters from the virtual impedance loop control to be the input to the FCS-MPC for a faster tracking response and to have minimum tracking error for better pulse-width modulation generation in the space-vector form. As a result, the circulating current was maintained at below 5% and the inverters were able to share an equal power based on the load required. At the end, the performance of the AVI-based control scheme was compared with those of the conventional and static-virtual-impedance-based methods, which have also been tested in simulation using MATLAB/Simulink software 2021a version. The comparison results show that the AVI FCS MPC give 5% error compared to SVI at 10% and conventional PI at 20%, in which AVI is able to minimize the circulating current when mismatch impedance is applied to the DGs.
format Article
author Khan, Mubashir Hayat
Zulkifli, Shamsul Aizam
Tutkun, Nedim
Ekmekci, Ismail
Burgio, Alessandro
author_facet Khan, Mubashir Hayat
Zulkifli, Shamsul Aizam
Tutkun, Nedim
Ekmekci, Ismail
Burgio, Alessandro
author_sort Khan, Mubashir Hayat
title Decentralized Virtual Impedance Control for Power Sharing and Voltage Regulation in Islanded Mode with Minimized Circulating Current
title_short Decentralized Virtual Impedance Control for Power Sharing and Voltage Regulation in Islanded Mode with Minimized Circulating Current
title_full Decentralized Virtual Impedance Control for Power Sharing and Voltage Regulation in Islanded Mode with Minimized Circulating Current
title_fullStr Decentralized Virtual Impedance Control for Power Sharing and Voltage Regulation in Islanded Mode with Minimized Circulating Current
title_full_unstemmed Decentralized Virtual Impedance Control for Power Sharing and Voltage Regulation in Islanded Mode with Minimized Circulating Current
title_sort decentralized virtual impedance control for power sharing and voltage regulation in islanded mode with minimized circulating current
publisher Mdpi
publishDate 2024
url http://eprints.uthm.edu.my/12390/1/J17852_b092df39ad0432d3ff5b650742ce2f77.pdf
http://eprints.uthm.edu.my/12390/
https://doi.org/10.3390/electronics13112142
_version_ 1825163109311971328
score 13.239859

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