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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