報告書番号

184013

タイトル（和文）

配電線耐雷性の自然雷による実証－北陸電力（株）福井火力発電所における誘導雷サージ観測結果（その３）－

タイトル（英文）

INVESTIGATIONS OF LIGHTNING PROTECTION CHARACTERISTICS ON DISTRIBUTION LINE SYSTEMS BY MEANS OF OBSERVATIONS OF NATURAL LIGHTNING -MEASUREMENTS OF INDUCED LIGHTNING SURGES AT FUKUI POWERSTATION (3)-

概要 （図表や脚注は「報告書全文」に掲載しております）

北陸電力（株）福井火力発電所において，５７年度，５８年度に計２１回の誘導雷電圧波形が観測された。観測結果の特徴は，次の通りである。（１）正極性雷撃電流に対応して負極性誘導雷電圧波形がはじめて３例観測された。（２）雷撃電流波形，誘導雷電圧波形，双方とも短時間に多数のピークを含む波形が１例観測された。（３）架空地線の接地点から離れた線路上の地点において，架空地線の誘導電圧抑制効果の遅れを確認できるデータを得た。

概要 （英文）

21 WAVEFORMS OF LIGHTNING INDUCED VOLTAGE WERE OBSERVED IN THE LIGHTNING SEASONS FROM NOVEMBER 1982 THROUGH MARCH 1984 USING THE MEASURING SYSTEM SETTLED AT FUKUI THERMAL POWER STATION OF HOKURIKU ELECTRIC POWER COMPANY. THE MAIN RESULTS IN THE ABOVE PERIODARE SHOWN BELOW; (1) THREE WAVEFORMS OF LIGHTNING INDUCED VOLTAGE WITHNEGATIVE POLARITY IN RESPONSE TO THOSE OF RETURN STROKE CURRENT WITH POSITIVE POLARITY WERE MEASURED FOR THE FIRST TIME IN THIS STUDY. (2) A WAVEFORM OF LIGHTNING INDUCED VOLTAGE,WHICH INCLUDED MANY PEAKS IN THE SHORT TIME AS MUCH AS 200 MICRO SECOND,WAS MEASURED.CORRESPONDING RETURN STROKE CURRENT HAS ALSO MANY PEAKS. (3) THIS OBSERVATION CONFIRMED THE DELAY OF THE SHIELDING EFFECT OF THE OVERHEAD GROUND WIRE,WHICH WAS GROUNDED ABOUT 300 METERS DISTANT FROM THE DISCUSSING POINT ON THE DISTRIBURION LINE.

報告者

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