Enhanced unified power quality conditioner control mechanism for power quality improvement / Kamrul Hasan

Electrical power distribution quality has been significantly impacted by the widespread use of power electronic devices. Researchers have developed many dynamic and flexible solutions. Power electronics technology and fast-processing controllers have helped to introduce modern Unified Power Quality...

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Main Author:	Hasan, Kamrul
Format:	Thesis
Language:	English
Published:	2023
Subjects:	Photovoltaic power systems Electronics
Online Access:	https://ir.uitm.edu.my/id/eprint/72219/2/72219.pdf
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spelling	my-uitm-ir.722192024-07-22T06:55:03Z Enhanced unified power quality conditioner control mechanism for power quality improvement / Kamrul Hasan 2023 Hasan, Kamrul Photovoltaic power systems Electronics Electrical power distribution quality has been significantly impacted by the widespread use of power electronic devices. Researchers have developed many dynamic and flexible solutions. Power electronics technology and fast-processing controllers have helped to introduce modern Unified Power Quality Conditioners (UPQC). UPQC is a recent Active Power Filter (APF) method for grid voltage and current-related power quality concerns. Four primary issues were discovered in this study demanding subsequent research. First, UPQCs have major inherent synchronization concerns that cannot be overcome by the conventional d-q control-based Phase-locked Loop (PLL) techniques. Nonlinear power electronic loads in the system cause power quality issues in the grid voltage, which adversely affect the performance of d-q-PLL. Second, the conventional reference current generation techniques for UPQC for solving current related power quality issues still have limitations including computational complexity, average filtration ability, and slow dynamic response. Third, the conventional reference voltage generation techniques for UPQC for solving voltage-related power quality issues are unable to reduce the system complexity because of dependency on conventional d-q-PLL and proportional-integral (PI) controllers. PI controller design needs an accurate linear mathematical model, which is difficult to develop in nonlinear and time-varying systems, making tuning for optimum gain values time-consuming. Finally, sensitive loads demand continuous power with finer power quality, yet grid voltage fluctuation, long interruptions are hindering their operation. Thus, this study focuses on three major control mechanisms that can improve the dynamic and mitigating operations of the UPQC and integrate energy storage systems to support sensitive loads. First, this work improves the d-q-PLL structure and proposes a Savitzky Golay Filter (SGF)-based PLL to solve UPQC's power quality-related synchronization issues. Next, this study enhances the conventional d-q technique and proposes an SGF-based reference current generation technique for UPQC with a simple structure, higher filtration ability, and faster dynamic response characteristics to improve UPQC performance and reduce grid current Total Harmonic Distortion (THD). Furthermore, Self-Regulated Phase estimator (SRPE)-based reference voltage generation method for UPQC is proposed that can simplify the control structure while improving dynamic responsiveness. Finally, a Photovoltaic (PV) and battery-integrated UPQC system is developed to increase its performance under poor grid conditions and support sensitive loads. 2023 Thesis https://ir.uitm.edu.my/id/eprint/72219/ https://ir.uitm.edu.my/id/eprint/72219/2/72219.pdf text en public phd doctoral Universiti Teknologi MARA (UiTM) College of Engineering Othman, Muhammad Murtadha
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Othman, Muhammad Murtadha
topic	Photovoltaic power systems Electronics
spellingShingle	Photovoltaic power systems Electronics Hasan, Kamrul Enhanced unified power quality conditioner control mechanism for power quality improvement / Kamrul Hasan
description	Electrical power distribution quality has been significantly impacted by the widespread use of power electronic devices. Researchers have developed many dynamic and flexible solutions. Power electronics technology and fast-processing controllers have helped to introduce modern Unified Power Quality Conditioners (UPQC). UPQC is a recent Active Power Filter (APF) method for grid voltage and current-related power quality concerns. Four primary issues were discovered in this study demanding subsequent research. First, UPQCs have major inherent synchronization concerns that cannot be overcome by the conventional d-q control-based Phase-locked Loop (PLL) techniques. Nonlinear power electronic loads in the system cause power quality issues in the grid voltage, which adversely affect the performance of d-q-PLL. Second, the conventional reference current generation techniques for UPQC for solving current related power quality issues still have limitations including computational complexity, average filtration ability, and slow dynamic response. Third, the conventional reference voltage generation techniques for UPQC for solving voltage-related power quality issues are unable to reduce the system complexity because of dependency on conventional d-q-PLL and proportional-integral (PI) controllers. PI controller design needs an accurate linear mathematical model, which is difficult to develop in nonlinear and time-varying systems, making tuning for optimum gain values time-consuming. Finally, sensitive loads demand continuous power with finer power quality, yet grid voltage fluctuation, long interruptions are hindering their operation. Thus, this study focuses on three major control mechanisms that can improve the dynamic and mitigating operations of the UPQC and integrate energy storage systems to support sensitive loads. First, this work improves the d-q-PLL structure and proposes a Savitzky Golay Filter (SGF)-based PLL to solve UPQC's power quality-related synchronization issues. Next, this study enhances the conventional d-q technique and proposes an SGF-based reference current generation technique for UPQC with a simple structure, higher filtration ability, and faster dynamic response characteristics to improve UPQC performance and reduce grid current Total Harmonic Distortion (THD). Furthermore, Self-Regulated Phase estimator (SRPE)-based reference voltage generation method for UPQC is proposed that can simplify the control structure while improving dynamic responsiveness. Finally, a Photovoltaic (PV) and battery-integrated UPQC system is developed to increase its performance under poor grid conditions and support sensitive loads.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Hasan, Kamrul
author_facet	Hasan, Kamrul
author_sort	Hasan, Kamrul
title	Enhanced unified power quality conditioner control mechanism for power quality improvement / Kamrul Hasan
title_short	Enhanced unified power quality conditioner control mechanism for power quality improvement / Kamrul Hasan
title_full	Enhanced unified power quality conditioner control mechanism for power quality improvement / Kamrul Hasan
title_fullStr	Enhanced unified power quality conditioner control mechanism for power quality improvement / Kamrul Hasan
title_full_unstemmed	Enhanced unified power quality conditioner control mechanism for power quality improvement / Kamrul Hasan
title_sort	enhanced unified power quality conditioner control mechanism for power quality improvement / kamrul hasan
granting_institution	Universiti Teknologi MARA (UiTM)
granting_department	College of Engineering
publishDate	2023
url	https://ir.uitm.edu.my/id/eprint/72219/2/72219.pdf
_version_	1811768643405479936

Enhanced unified power quality conditioner control mechanism for power quality improvement / Kamrul Hasan

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