The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	Petri net models of microgrids with distributed generators
Author:	Lu, Xiaoyu
View Online:	njit-etd2015-008 (xiii, 64 pages ~ 1.0 MB pdf)
Department:	Department of Electrical and Computer Engineering
Degree:	Master of Science
Program:	Electrical Engineering
Document Type:	Thesis
Advisory Committee:	Zhou, MengChu (Committee chair) Hubbi, Walid (Committee member) Kang, Qi (Committee member)
Date:	2015-01
Keywords:	Microgrids Distributed generators Petri net model
Availability:	Unrestricted
Abstract:	This thesis introduces some basic concepts and control methods about a microgrid. Then, two hot issues are investigated. One is how to control multiple distributed generators; and another is how to model both discrete event and continuous behaviors of a microgrid. To address these two issues, this thesis work applies Petri nets to both modeling and control of a microgrid. Ordinary Petri nets, hybrid Petri nets, and finite capacity Petri nets, are introduced with their examples targeted at modeling the behavior of a microgrid. Coordination control of multiple distributed generators based on a Petri net model is proposed. Compared with multi-V/f control, the Petri net based control enables the system to operate with a longer stable time interval. Finally, a hybrid Petri net model is constructed to model both discrete event and continuous behaviors of an on-load tap changing transformer system. Compared with an algebraic method, the hybrid Petri net offers a clear and easy-to-understand method to describe such a system.