Masters Theses
Keywords and Phrases
Faults; Inverters; Multiple PV; PV Systems
Abstract
"A two-stage photovoltaic grid-connected microgrid modeling approach is presented in this work. The purpose of the modeling is the behavior study of the microgrid during the low-voltage event on the grid. A complete mathematical model is discussed for each component of the system. The MPPT of the photovoltaic system is integrated with the boost controller to inject the constant current in the DC-link. The boost converter and the inverter control is implemented using the cascaded PI control. A dual second-order generalized integrator (DSOGI) method is implemented for the sequence extraction. The inverter controller is designed to meet the grid-code requirement of low-voltage ride through (LVRT) and reactive power injection. The simulation model is designed in a MATLAB/PLECS environment, and the controller design is validated by running a low-voltage event on the grid.
To observe the interaction of a multiple PV system with the grid, a nonlinear average model of the two-stage grid-connected PV system was designed and validated against the switching model. A low voltage event on the grid was simulated to observe the impact on the multiple PV system. A power quality event of voltage dip during the unbalance voltage on the grid is presented. The implication of the ungrounded system during the low-voltage event is explained. In addition, the importance of grounding and the effect of the line impedance for the why-connected system is described in detail"--Abstract, page iii.
Advisor(s)
Kimball, Jonathan W.
Committee Member(s)
Ferdowsi, Mehdi
Shamsi, Pourya
Department(s)
Electrical and Computer Engineering
Degree Name
M.S. in Electrical Engineering
Sponsor(s)
U.S. Solar Energy Technologies Program
Publisher
Missouri University of Science and Technology
Publication Date
Summer 2018
Pagination
ix, 69 pages
Note about bibliography
Includes bibliographical references (pages 67-68).
Rights
© 2018 Paresh Vinubhai Patel, All rights reserved.
Document Type
Thesis - Open Access
File Type
text
Language
English
Thesis Number
T 11392
Electronic OCLC #
1051223335
Recommended Citation
Patel, Paresh Vinubhai, "Modeling and control of three-phase grid-connected PV inverters in the presence of grid faults" (2018). Masters Theses. 7806.
https://scholarsmine.mst.edu/masters_theses/7806
Comments
The project was supported in part by the MidAmerica Regional Microgrid Education and Training (MARMET) Consortium, a project of the Department of Energy’s SunShot program, award DE-0006341.