Energy consumption-based voltage reduction control strategy for improving dynamic stability in inverter-interfaced islanded microgrids

Energy consumption-based voltage reduction control strategy for improving dynamic stability in inverter-interfaced islanded microgrids


Energy consumption-based voltage reduction control strategy for improving dynamic stability in inverter-interfaced islanded microgrids

نوع: Type: thesis

مقطع: Segment: masters

عنوان: Title: Energy consumption-based voltage reduction control strategy for improving dynamic stability in inverter-interfaced islanded microgrids

ارائه دهنده: Provider: Alireza Gorjian

اساتید راهنما: Supervisors: Dr. Mohammdad H. Moradi

اساتید مشاور: Advisory Professors: Dr. Mohsen Eskandari

اساتید ممتحن یا داور: Examining professors or referees: Dr. Majid ghaniee Zarch- Dr. Alireza Hatami

زمان و تاریخ ارائه: Time and date of presentation: 07/02/2023at at 15pm to 17pm

مکان ارائه: Place of presentation: Electrical engineering department seminar

چکیده: Abstract: In recent years, the penetration of the inverter interfaced distributed energy resources (IIDGs) as the main suppliers in microgrids (MGs) is increased significantly due to their high efficiency, reliability, and their fast response. However, with increased penetration of IIDGs, there are challenges to be addressed such as the lack of inertia especially while operating in islanded mode (IM). Although the IM of an MG is one of the most important advantages, the employment of MGs through the mentioned operational mode can lead to critical challenges which lead to dynamic instabilities such as frequency and voltage deviations. This is due to the highly decreased inertia level in inverter-interface MGs which becomes a critical issue in IM operation. A convenient solution addressing these issues is employing the energy consumption-based or conservation voltage reduction (CVR) strategy that is also a part of demand-side management (DSM) which is able to increase network inertia by striking a balance between power generation and consumption. CVR is able to satisfy both the stability and also the economic issues which is another big concern of the contemporary power networks. Specifically, the primary objective of employing the CVR in modern grids comprising power electronics (PE)-based components are inertia synthesis, and frequency support, aiming to improve dynamic stability. However, due to the complexities of PE-based grids, implementing the CVR methods cannot be done using traditional techniques as in conventional power systems. In light of this CVR implementation in small-scale islanded MGs is realized through droop controllers. Although multiple methods are utilized on islanded inverter-interfaced MGs to develop droop-based CVR, critical aspects such as accurate active and reactive power sharing should be considered aiming to prevent any issue in developing the CVR control strategy. Therefore, in this research, a decentralized droop-based CVR strategy is proposed in order to improve the performance of islanded MGs and improve dynamic stability by increasing the balance in power production and consumption balance. Furthermore, a set of simulations is established in MATLAB/Simulink to prove the efficiency of the proposed control method

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