報告書番号

R02026

タイトル（和文）

長期フィールド測定に基づくＯＰＧＷ伝搬光の偏波変動特性と多機能観測の可能性

タイトル（英文）

Applicability to multi-state monitoring of meteoric influence by long term measurements of polarization fluctuation of light in OPGW

概要 （図表や脚注は「報告書全文」に掲載しております）

ＯＰＧＷ伝搬光の偏波変動の長期フィールド測定を通じて、落雷検出の他に地電流や気象など送電設備の監視に有効な観測対象の多元化の可能性を明らかにした。その結果、落雷検出とともに風などの気象要因を検出できる可能性があることが判明した。地震については前兆現象であつ地電流に対してはまだ判明していないが、機械的な揺れは検出できることが判明した。

概要 （英文）

We have investigated the characteristics of polarization state fluctuation of light propagating in OPGW (Optical Ground Wire) by the long term measurement and studied the applicability to monitoring of environment including lightning, wind, and seismic signals. As a result, lightning attacks on the OPGW for 500kV power transmission line were detected with high speed fluctuations of polarization within 0.1msec as well as the one for 66kV. Long term fluctuations with periods of 1 second to 1 minute, which had been disregarded as random noises so far, were found the signals for environment by comparing two routes measurements. Especially wind was good correlation with the averaged magnitude of polarization fluctuation. And more the fluctuations due to mechanical swing by earthquake were observed but there were not detected the predictive seismic electrical signals.

報告者

キーワード