IET Generation, Transmission & Distribution Research Article
Robust quadratic-based BFS power flow method for multi-phase distribution systems
ISSN 1751-8687 Received on 14th December 2015 Revised on 25th February 2016 Accepted on 11th March 2016 doi: 10.1049/iet-gtd.2015.1518 www.ietdl.org
Karar Mahmoud 1, 2 ✉, Naoto Yorino 2 1
Faculty of Engineering, Aswan University, 81542 Aswan, Egypt Graduate School of Engineering, Hiroshima University, 739-8527 Hiroshima, Japan ✉ E-mail:
[email protected]
2
Abstract: This study presents an efficient power flow method for analysing distribution systems. The proposed method utilises efficient quadratic-based (QB) models for various components of distribution systems. The power flow problem is formulated and solved by a backward/forward sweep (BFS) algorithm. The proposed QBBFS method accommodates multi-phase laterals, different load types, capacitors, distribution transformers, and distributed generation. The advantageous feature of the proposed method is robust convergence characteristics against ill conditions, guaranteeing lower iteration numbers than the existing BFS methods. The proposed method is tested and validated on several distribution test systems. The accuracy is verified using OpenDSS. Comparisons are made with other commonly used BFS methods. The results confirm the effectiveness and robustness of the proposed QBBFS at different conditions.
Nomenclature i, j p, s l Re, Im 0, 1, 2 m, k ∈ (a, b, c) PDGi, QDGi Vi Sj = Pj + jQj Sj, load Ij Zij = Rij + jXij Zj, rated = Rj, rated + jXj, rated Pj, rated, Qj, rated Vj, rated, Ij, rated [ABCDij]k k DVij−mutual Zps, Zp, Zs T
