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Elucidation of DC magnetic deviation in converter transformers used for a self‐commutated BTB system during single‐line‐to‐ground faults
Author(s) -
Hagiwara Makoto,
Viet Pham Phuong,
Akagi Hirofumi
Publication year - 2009
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.20805
Subject(s) - transformer , electrical engineering , engineering , transmission line , current transformer , electric power system , electronic engineering , electric power transmission , physics , control theory (sociology) , topology (electrical circuits) , computer science , voltage , power (physics) , control (management) , quantum mechanics , artificial intelligence
This paper deals with a 50‐MW self‐commutated BTB (Back‐To‐Back) system intended for power flow control between transmission networks. It focuses on the dynamic behavior of the BTB system during single‐line‐to‐ground (SLG) faults. During an SLG fault, a DC magnetic deviation appears in the converter transformers used for the BTB system just after the occurrence and restoration of the fault. It is indispensable to understand the magnitude of the deviation, because it may bring about magnetic saturation as well as subjecting the transformers to a large magnetizing current. This paper derives theoretical equations related to the deviation during the SLG fault. The theoretical analysis developed in this paper may make significant contributions to designing the transformers. © 2009 Wiley Periodicals, Inc. Electr Eng Jpn, 168(2): 48–59, 2009; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20805