報告書番号

184015

タイトル（和文）

高鉄塔送電線雷撃実態の実測調査－馬瀬北部線および駿遠駿河線での実測調査結果－

タイトル（英文）

INVESTIGATON OF LIGHTNING STROKES AND LIGHTNING FAULTS ON EHV DOUBLE-CIRCUIT TRANSMISSION LINES-THE RESULTS ON MASE-HOKUBU AND SUN-EN-SURUGA LINES-

概要 （図表や脚注は「報告書全文」に掲載しております）

本報告は中部電力と共同して同社の馬瀬北部線，駿遠駿河線において５１年から５８年まで実施した送電線雷撃実態の調査結果を集約したもので，結果はつぎの通りである。１中部山岳地域の雷撃頻度は従来一般に考えられていた値より２～３倍高いことが明らかになった。２山岳地域の雷撃電流の極性分布は，正極性が約４０％含まれていることがわかった。３実測期間中における両線路の延雷撃数は１６３回（馬瀬北部線１０５回，駿遠駿河線５８回）であったが線路事故は２件（１Ｌ側上相，１Ｌ側下相）でいずれもしゃへい失敗事故と判定した。

概要 （英文）

INVESTIGATION OF LIGHTNING STROKES AND LIGHTNING FAULTS BY USING THE LIGHTNING FAULT APPEARANCE-FINDERS HAS BEEN CARRIED OUT ON EHV DOUBLE-CIRCUIT MASE-HOKUBU LINE WHICH EXISTS IN THE CENTRAL MOUNTAINOUS AREA DURING ABOUT 7.3 YEARS FROM THE SUMMER SEASON 1976 AND SUN-EN-SURUGA LINE WHICH EXISTS IN THE MOUNTAINOUS AREA OF THE PACIFIC OCEAN SIDE,DURING ABOUT 3.3 YEARS FROM THE SUMMER SEASON 1980. MAIN INVESTIGATION RESULTS ARE AS FOLLOWS: (1) LIGHTNING STROKES IN EHV TRANSMISSION LINES IN THE MOUNTAINOUS AND SEVERE LIGHTNING-STORM AREA IS MORE FREQUENT AND ON MASE-HOKUBU LINE MORE THAN 3.1 TIMES OF THE GENERAL VALUE AND ON SUN-EN-SURUGA LINE MORE THAN 1.8 TIMES.FROM THE ABOVE,THE LIGHTNING STORM TO HIGH-TOWER TRANSMISSION LINES IN THE CENTRAL MOUNTAINOUS AREA IS MORE SEVERE THAN THAT OF THE PACIFIC OCEAN SIDE. (2) THE RATE OF POSITIVE LIGHTNING STROKES IN THE CENTRAL MOUNTAINOUS AREA IS 30% IN SUMMER SEASON AND CLOSE TO THAT OF JAPAN SEA COAST IN WINTER SEASON.WHILE,THE RATE IN MOUNTAINOUS AREA OF PACIFIC OCEAN SIDE IS 12% AND SHOWS THE SPECIAL FEATURE OF LIGHTNING STROKES IN SUMMER SEASON. (3)IT WAS RECORDED BY THE APPEARANCE-FINDER THAT THE LINE TO GROUND FAULTS AT NO.62 TOWER ON MASE-HOKUBU LINE WERE CAUSED BY SHIELDING FAILURE OF LIGHTNING. (4) IN THE CENTRAL MOUNTAINOUS AREA,THE LIGHTNING STROKES ON THE LINE AT THE RIDGE AND THE SLOPE OF MOUNTAINSIDE IS MORE FREQUENT, AND THEN IT HAS A TENDENCY IN THE MOUNTAINOUS AREA OF THE PACIFIC OCEAN SIDE THAT THE STROKES CONCENTRATE ON THE LINE AT THE SLOPE OF MOUNTAIN-SIDE ON THE COURSE OF A RIVER.IT GIVES SUGGESTIONS THAT THESE SPECIAL FEATURES ARE THE ESSENTIAL MATERIALS FOR CONSIDERING THE LIGHTNING PROTECTION DESIGN AND THE ROUTE SELECTION OF TRANSMISSION LINES IN THE ABOVE AREA.

報告者

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