Show simple item record

dc.contributor.authorHassanzahraee, Mohammaden
dc.date2012-04-25 12:08:48.634
dc.date.accessioned2012-04-27T14:47:12Z
dc.date.issued2012-04-27
dc.identifier.urihttp://hdl.handle.net/1974/7132
dc.descriptionThesis (Master, Electrical & Computer Engineering) -- Queen's University, 2012-04-25 12:08:48.634en
dc.description.abstractFuture electric grid will evolve from the current centralized and radial model toward a more distributed one. In recent years, distributed generation (DG) units have been playing an important role in electric generation due to their promising advantages in reducing air pollution, improving power system efficiency, and relieving stress on power transmission and delivery systems. Despite the increased penetration of DG systems, the application of individual DG system always has its limitation such as high cost/W, limited capacity and reliability, and safety concerns. A better way to utilize the emerging potential of DG is to take a system approach viewing generation and associated loads as a subsystem called a “microgrid”. Forming an electric island, the microgrid can work autonomously following a disturbance. In the islanded microgrid, micro sources are responsible for maintaining the voltage and the frequency of the microgrid system within their specified limits and sharing the load between the generators in a stable manner. However, a robust and stable operation of a microgrid depends on a robust control scheme of the microgrid sources. The most common technique to control microgrid sources is based on conventional droop characteristics. Although the conventional frequency/voltage droop technique properly shares a common active load, the reactive power sharing accuracy can be strongly affected by system parameter and active power control. In addition, frequency variations of different sources in transient mode can cause poor active power sharing. To override the above-mentioned problems, a novel frequency/voltage droop scheme is proposed in this thesis. The proposed scheme improves the performance of the microgrid in terms of power sharing and voltage regulation and smooths the system’s dynamic and transient responses. This work has developed the modeling, control parameters design, and power-sharing control starting from a single voltage source inverter to a number of interconnected DG units forming a flexible microgrid. Specifically, this thesis presents: • A control-oriented modeling based on active and reactive power analysis. • A control synthesis based on enhanced droop control technique. • A small signal stability study to give guidelines for properly adjusting the control system parameters according to the desired dynamic response.en
dc.language.isoengen
dc.relation.ispartofseriesCanadian thesesen
dc.rightsThis publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.en
dc.subjectDroopen
dc.subjectControlen
dc.subjectSmall Signal Stabilityen
dc.subjectMicrogriden
dc.titleTransient Droop Control Strategy for Parallel Operation of Distributed Energy Resources in an Islanded Microgriden
dc.typethesisen
dc.description.restricted-thesisI am going to publish a journal paper based on this thesis. So, I prefer not to publish it right now.en
dc.description.degreeMaster of Applied Scienceen
dc.contributor.supervisorBakhshai, Alirezaen
dc.contributor.departmentElectrical and Computer Engineeringen
dc.embargo.terms1825en
dc.embargo.liftdate2017-04-26
dc.degree.grantorQueen's University at Kingstonen


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record