Abstract
Most existing power flow programs assume balanced loading where the positive sequence impedances are sufficient to use. However, a more accurate approach is often required due to the increasing penetration of single-phase distributed generation sources on distribution grids which tend to introduce large imbalances. the proposed method uses a positive sequence power flow algorithm where the inputs are modified to accurately simulate an unbalanced system. the algorithm is tested on the IEEE 4-bus system and the results compared with published results. the impact of the analysis on system efficiency calculations are shown for the 4-bus system as well as for a large distribution system (FREEDM Green Hub) with solid-state transformers (SSTs) and distributed generation. with this modeling technique, a better understanding of an unbalanced system can be achieved and steps taken to improve the efficiency. © 2011 IEEE.
Recommended Citation
K. Stefanski and B. H. Chowdhury, "Analysis of Unbalanced System Efficiency with a Positive Sequence Power Flow Program," NAPS 2011 - 43rd North American Power Symposium, article no. 6025182, Institute of Electrical and Electronics Engineers, Oct 2011.
The definitive version is available at https://doi.org/10.1109/NAPS.2011.6025182
Department(s)
Electrical and Computer Engineering
Keywords and Phrases
distributed generation; distribution systems; FREEDM; renewable energy; Solid state transformer; unbalanced power flow
International Standard Book Number (ISBN)
978-145770419-2
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Institute of Electrical and Electronics Engineers, All rights reserved.
Publication Date
13 Oct 2011
