Graduation Year
2015
Document Type
Dissertation
Degree
Ph.D.
Degree Name
Doctor of Philosophy (Ph.D.)
Degree Granting Department
Electrical Engineering
Major Professor
Zhixin Miao, Ph.D.
Committee Member
Lingling Fan, Ph.D.
Committee Member
Fangxing Li, Ph.D.
Committee Member
Stephen Saddow, Ph.D.
Committee Member
Lee (Elias) Stefanakos, Ph.D.
Committee Member
Bo Zeng, Ph.D.
Keywords
Impedance model, DFIG, PV, TCSC, Stability, VSC, Resonance, Microgrid
Abstract
The objective of this dissertation is to carry out dynamic modeling, analysis and control of power systems with Renewable Energy Sources (RES) such as: Photovoltaic (PV) power sources and wind farms. The dissertation work is mainly focused on microgrid since it plays a major role in modern power systems and tend to have higher renewable power penetration. Two main theoretical concepts, dynamic phasor and impedance modeling have been adopted to model and analyze the power systems/mocrogrids with RES. The initial state calculation which is essential for small signal analysis of a system is carried out as the first step of the dissertation work. Dynamic phasor and impedance modeling techniques have been utilized to model and analyze power systems/micogrids as the second phase of the work. This part consists of two main studies. First case investigates the impedance modeling of Thyristor Controller Series Capacitor (TCSC) for sub-synchronous resonance (SSR) analysis where a wind farm is connected to a power system through series compensated line. Second case utilizes the dynamic phasor concept to model a microgrid in unbalanced condition. Here the unbalance is caused by a single phase PV connected to the microgrid. Third Phase of the dissertation work includes upper level control of the microgrid. Here prediction and optimization control for a microgrid with a wind farm, a PV system, an energy storage system and loads is evaluated. The last part of the dissertation work focuses on real time modeling and hardware in loop simulation test bed for microgrid applications.
This dissertation has led to four journal papers (three accepted, one submitted) and five conference papers.
Scholar Commons Citation
Piyasinghe, Lakshan Prageeth, "Dynamic Phasor Based Analysis and Control in Renewable Energy Integration" (2015). USF Tampa Graduate Theses and Dissertations.
https://digitalcommons.usf.edu/etd/6015
