الفهرس 
AbstractOnly 14 pages are availabe for public view
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Abstract
Power quality (PQ) assurance is a vital part of electrical distribution networks. There are many advantages and benefits of improving PQ, especially in the modern/smart grid. Smart grid (SG) has a lot of complicated and sensitive electrical components (non-linear loads) in addition to renewable energy systems (wind-solar) that may also be a source of PQ disturbances. PQ problems harm personal life and national production. Therefore, improving PQ in the most current scientific methods has concerns utility operators and researchers in this field. Static Synchronous Compensator (STATCOM), Unified Power Quality Conditioner (UPQC), and Dynamic Voltage Restorer (DVR) are among the fastest response Flexible AC Transmission Systems (FACTS) that are installed in smart grids to mitigate power quality disturbances such as voltage fluctuations, sag, swell, and harmonics. The proposed STATCOM, UPQC, and DVR are designed and simulated in MATLAB/Simulink to overcome PQ-related disruptions in smart grids in this research. Accordingly, the performances between the proposed solutions are highlighted through this research, and the reliability of renewable energy systems on them during faults and therefore, the utility operator will be able to choose the appropriate FACTS systems. This thesis will present an actual case study of one of the largest factories in the Middle East, discussing installing the STATCOM effect on the various power quality disturbances. This research will develop an affordable DVR system to improve the power quality in a low voltage smart distribution grid. In this research, the proposed DVR was designed and simulated in MATLAB/Simulink, where it shows excellent performance to overcome PQ-related disturbances such as voltage sag/swell, flicker, and harmonics. As per the given results of this study, STATCOM, UPQC, and DVR have shown exemplary performance in the PQ improvement investigations conducted in the context of smart/modern grids.
This thesis is divided into six chapters which are organized as follows:
Chapter (1)
This chapter describes the introduction and talks about smart grids, their components and importance, the electrical power disturbances that cause them many damages, and the sources of those disturbances. This chapter also discussed a comprehensive review of how to overcome power quality problems, especially in smart grids, and clarified the importance and objectives of this thesis.
Chapter (2)
This chapter describes the fastest response Flexible AC Transmission Systems (FACTS) installed in smart grids to mitigate power quality disturbances such as Static Synchronous Compensator (STATCOM) and Unified Power Quality Conditioner (UPQC), and Dynamic Voltage Restorer (DVR).
Chapter (3)
This chapter presents a study between two of the most prominent flexible current transmission systems: the static synchronous compensator STATCOM and the unified power quality conditioner UPQC. The study is to install these two systems on the proposed smart grid, which has many electrical power disturbances, and how each design will deal with those problems using MATLAB/Simulink software. This chapter will compare the two proposed systems so that the utility operator can choose the appropriate system.
Chapter (4)
This chapter presents a real experimental case study of improving electrical power quality using STATCOM. This study is based on the analysis in the third chapter, where the STATCOM was selected to be installed in one of the largest factories in the Middle East, suffering from severe PQ disturbances. This chapter explained the importance of installing such systems in such factories to avoid any damages and penalties. As a result, the static synchronous compensator provided a perfect performance in improving the power quality.
Chapter (5)
This chapter proposes a novel design idea of using a two-level inverter topology to integrate with a dynamic voltage optimizer system to obtain a simple, straightforward, low-cost LV system that is easy to use, flexible, and practical. This system will be installed in low voltage networks, unlike the common one, which is its installation in medium and high voltage networks. The study will install this proposed system on the low voltage side of smart homes with sensitive loads using MATLAB/Simulink software. This study will show the effectiveness and efficiency of this proposed system in overcoming the various electrical power quality problems.
Chapter (6)
This chapter presents the general conclusion of the thesis, reviews the main points studied in this thesis, and mentions some future works.