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A fault location method using air‐gap fluxes of synchronous generator
Author(s) -
Matsuki Junya,
Hayashi Yasuhiro,
Nakano Toshikazu,
Funasaki Yoichi
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.20707
Subject(s) - armature (electrical engineering) , stator , air gap (plumbing) , voltage , electromagnetic coil , shunt generator , fault (geology) , electrical engineering , engineering , control theory (sociology) , mechanics , physics , computer science , materials science , geology , seismology , control (management) , artificial intelligence , composite material
This paper deals with an experimental investigation of a novel fault location method using air‐gap flux distributions of a synchronous generator connected to a power system. Air‐gap fluxes are the sum of field fluxes and armature reaction fluxes. Changes in armature current and field current at a fault contribute directly to the armature reaction fluxes and field fluxes, then resultant air‐gap fluxes. Therefore, air‐gap fluxes can be utilized to locate a fault. Wavelet analysis is applied to the induced voltages of search coils, which are wound around a stator tooth top for measurement of the air‐gap flux. It is shown that the fault type and location can be estimated based on the change in the search coil voltages measured during the fault. © 2009 Wiley Periodicals, Inc. Electr Eng Jpn, 167(3): 20–27, 2009; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20707