時間周波数解析を用いた電力ケーブル故障点標定方法の研究
時間周波数解析を用いた電力ケーブル故障点標定方法の研究
カテゴリ: 論文誌(論文単位)
グループ名: 【B】電力・エネルギー部門
発行日: 2011/10/01
タイトル(英語): Study on the Fault Location Method for Power Cables using the Time-frequency Analysis
著者名: 小林 真一(中部電力(株)名古屋支店 中電力センター),森本 希(中部電力(株)工務技術センター),宮島 和久(中部電力(株)長野支店 技術部),穂積 直裕(豊橋技術科学大学)
著者名(英語): Shin'ichi Kobayashi (Chubu Electric Power Co., Inc.), Nozomi Morimoto (Chubu Electric Power Co., Inc.), Kazuhisa Miyajima (Chubu Electric Power Co., Inc.), Naohiro Hozumi (Toyohashi University of Technology)
キーワード: 電力ケーブル,故障点標定法,放電検出型パルスレーダ法,時間周波数解析 power cables,fault location method,discharge pulse radar method,time-frequency analysis
要約(英語): The pulse radar method is one of fault location methods for power cables. It locates the breakdown point by measuring the delay time of the echo or the discharge signal coming from the breakdown point. The equipment for the pulse radar method is more compact compared with the Murray loop bridge, and its operation is more simple because sensitive adjustments of proportion are not needed. However the signal propagating through the cable is distorted depending on the distance and frequency, leading to a poor accuracy for the location. In this report, signal processing in the time-frequency domain is proposed to solve this problem. The pulse waveforms received at two different terminals of the cable were extracted by a window function, and subsequently Fourier transformed in order to calculate the phase difference at an appropriate frequency. A special care was taken for un-wrapping the folded phase spectrum. The phase difference was interpreted as the time lag at an identical frequency. The technique was applied to the fault location for a full size XLPE cable line.
本誌: 電気学会論文誌B(電力・エネルギー部門誌) Vol.131 No.10 (2011)
本誌掲載ページ: 849-854 p
原稿種別: 論文/日本語
電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejpes/131/10/131_10_849/_article/-char/ja/
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