Abstract
A new fault location(FL) system for 275 kV
substation bus bars has been developed.using optical current
transducers (OCTs). This system detects fault current by
combining OCTs with existing wound current
transformers(CTs). The OCT is capable of measuring shortcircuit
current up to 50 kA. This paper describes the FL
system configuration, the OCT design, and its performance.
Also, this paper shows the OCT transient performance by
simulation and examination. The system demonstrated good
discrimination performance in the artificial location
performance test. Recently, the systems were installed in the
Seino and the Higashinagoya substations of Chube Electric
Power Co.,Inc.
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