Power sharing and voltage compensation modeling using adaptive virtual impedance-based predictive control in islanded microgrid

Power sharing and voltage compensation modeling using adaptive virtual impedance-based predictive control in islanded microgrid

In microgrid’s islanded mode of operation, the precise power sharing is an immensely critical challenge when there is a difference in line impedance of the DG inverters connected in parallel. The existing control strategies in parallel connected inverter-based microgrid power sharing issues, voltage...

Full description

Saved in:
Bibliographic Details
Main Author: Khan, Mubashir Hayat
Format: Thesis
Language:English
English
English
Published: 2023
Subjects:
T Technology (General)
Online Access:http://eprints.uthm.edu.my/11043/1/24p%20MUBASHIR%20HAYAT%20KHAN.pdf
http://eprints.uthm.edu.my/11043/2/MUBASHIR%20HAYAT%20KHAN%20COPYRIGHT%20DECLARATION.pdf
http://eprints.uthm.edu.my/11043/3/MUBASHIR%20HAYAT%20KHAN%20WATERMARK.pdf
Tags: Add Tag
No Tags, Be the first to tag this record!
id my-uthm-ep.11043
record_format uketd_dc
spelling my-uthm-ep.110432024-05-29T02:26:18Z Power sharing and voltage compensation modeling using adaptive virtual impedance-based predictive control in islanded microgrid 2023-02 Khan, Mubashir Hayat T Technology (General) In microgrid’s islanded mode of operation, the precise power sharing is an immensely critical challenge when there is a difference in line impedance of the DG inverters connected in parallel. The existing control strategies in parallel connected inverter-based microgrid power sharing issues, voltage compensation at point of common coupling (PCC) and circulating current among connected inverters in mismatched feeder impedance case need to be addressed. This project aimed to develop decentralised power sharing and voltage compensation modelling using the predictive control scheme for an islanded microgrid structure with two Voltage Source Converters (VSCs). This mismatched impedance was nullified by using the adaptive virtual impedance (AVI) control. The finite control set–model predictive control (FCS-MPC) strategy was used to replace the pulse-width modulation (PWM) strategy in order to have fast response, which had the benefit of power sharing among the VSCs, while compensating for the rated voltage at the PCC due to load changing. The AVI was used to generate the reference voltage, which responded to the values of the impedance mismatch by utilising the derivative terms for the FCS-MPC for faster tracking response and minimum tracking error when the load changed rapidly. The AVI-based predictive control scheme was compared with the conventional and static virtual impedance (SVI) methods based on the simulation results obtained through MATLAB/Simulink software. From the results, the power sharing accuracy for the connected loads for the proposed AVI-based predictive control scheme improved by 99%. The voltage error for the compensation at PCC was 0.01% under the AVI-based predictive control scheme, 1.92 % under the SVI-based control scheme and 0.72 % under the conventional control scheme. The circulating current was suppressed up to 0.047 A under the AVI-based predictive control scheme with the condition of mismatched line impedances. The AVI-based predictive control scheme was able to enhance power sharing performance and simultaneously maintain the voltage magnitude at the PCC effectively when the loads changed 2023-02 Thesis http://eprints.uthm.edu.my/11043/ http://eprints.uthm.edu.my/11043/1/24p%20MUBASHIR%20HAYAT%20KHAN.pdf text en public http://eprints.uthm.edu.my/11043/2/MUBASHIR%20HAYAT%20KHAN%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/11043/3/MUBASHIR%20HAYAT%20KHAN%20WATERMARK.pdf text en validuser phd doctoral Universiti Tun Hussein Onn Malaysia Fakulti Kejuruteraan Elektrik dan Elektronik
institution Universiti Tun Hussein Onn Malaysia
collection UTHM Institutional Repository
language English
English
English
topic T Technology (General)
spellingShingle T Technology (General)
Khan, Mubashir Hayat
Power sharing and voltage compensation modeling using adaptive virtual impedance-based predictive control in islanded microgrid
description In microgrid’s islanded mode of operation, the precise power sharing is an immensely critical challenge when there is a difference in line impedance of the DG inverters connected in parallel. The existing control strategies in parallel connected inverter-based microgrid power sharing issues, voltage compensation at point of common coupling (PCC) and circulating current among connected inverters in mismatched feeder impedance case need to be addressed. This project aimed to develop decentralised power sharing and voltage compensation modelling using the predictive control scheme for an islanded microgrid structure with two Voltage Source Converters (VSCs). This mismatched impedance was nullified by using the adaptive virtual impedance (AVI) control. The finite control set–model predictive control (FCS-MPC) strategy was used to replace the pulse-width modulation (PWM) strategy in order to have fast response, which had the benefit of power sharing among the VSCs, while compensating for the rated voltage at the PCC due to load changing. The AVI was used to generate the reference voltage, which responded to the values of the impedance mismatch by utilising the derivative terms for the FCS-MPC for faster tracking response and minimum tracking error when the load changed rapidly. The AVI-based predictive control scheme was compared with the conventional and static virtual impedance (SVI) methods based on the simulation results obtained through MATLAB/Simulink software. From the results, the power sharing accuracy for the connected loads for the proposed AVI-based predictive control scheme improved by 99%. The voltage error for the compensation at PCC was 0.01% under the AVI-based predictive control scheme, 1.92 % under the SVI-based control scheme and 0.72 % under the conventional control scheme. The circulating current was suppressed up to 0.047 A under the AVI-based predictive control scheme with the condition of mismatched line impedances. The AVI-based predictive control scheme was able to enhance power sharing performance and simultaneously maintain the voltage magnitude at the PCC effectively when the loads changed
format Thesis
qualification_name Doctor of Philosophy (PhD.)
qualification_level Doctorate
author Khan, Mubashir Hayat
author_facet Khan, Mubashir Hayat
author_sort Khan, Mubashir Hayat
title Power sharing and voltage compensation modeling using adaptive virtual impedance-based predictive control in islanded microgrid
title_short Power sharing and voltage compensation modeling using adaptive virtual impedance-based predictive control in islanded microgrid
title_full Power sharing and voltage compensation modeling using adaptive virtual impedance-based predictive control in islanded microgrid
title_fullStr Power sharing and voltage compensation modeling using adaptive virtual impedance-based predictive control in islanded microgrid
title_full_unstemmed Power sharing and voltage compensation modeling using adaptive virtual impedance-based predictive control in islanded microgrid
title_sort power sharing and voltage compensation modeling using adaptive virtual impedance-based predictive control in islanded microgrid
granting_institution Universiti Tun Hussein Onn Malaysia
granting_department Fakulti Kejuruteraan Elektrik dan Elektronik
publishDate 2023
url http://eprints.uthm.edu.my/11043/1/24p%20MUBASHIR%20HAYAT%20KHAN.pdf
http://eprints.uthm.edu.my/11043/2/MUBASHIR%20HAYAT%20KHAN%20COPYRIGHT%20DECLARATION.pdf
http://eprints.uthm.edu.my/11043/3/MUBASHIR%20HAYAT%20KHAN%20WATERMARK.pdf
_version_ 1804890140957474816

Similar Items