光CTの波長分割多重伝送技術を用いたケーブル事故区間検出装置の開発

摘要

A fault detection system is applied to power lines consisting of both overhead power line and underground power cable in order to detect a fault on the underground power cable section and prevent the automatic reclosing.rnThe fault detection system using optical fiber current sensor has two subjects. The fist subject is that we have to use wound-type current transformer together, when applying the fault detection system to single-core underground power cable. The second subject is that we are not able to detect three-phase short-circuit fault in using the fault detection system.rnThis paper describes that we developed a new fault detection system using optical fiber current sensor by applying the multiplex transmission technology of optical fiber current sensor signal in order to solve these subjects.%ケーブル事故区間検出装置（以下，事故検）は，架空送rn電線と地中ケーブルが混在する送電線において，地中ケーrnブル区間の事故を検出し，再閉路による設備損壊の拡大やrnOFケーブルの火災を阻止するものである。rn我々は，従来のアナログ形事故検が中和トランス等の製rn造?補修が困難となったことから，平成16年に光ファイrnバ電流センサを用いた事故検（以下，光事故検）を開発しrnた。