非標準雷インパルス波形に対する SF_6ガス中の絶縁破壊特性 : 振動成分を含む波形に対するガスギャップの絶縁特性

概要

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Evaluation of lightning surge waveforms that actually enter into substations is important to investigating the test voltage of gas insulated switchgear (GIS). The actual lightning surge waveforms in substations are different from the standard lightning impulse voltage because they are complex and are usually superimposed with various oscillations. This paper describes insulation characteristics in SF6 gas gap under the waveforms including oscillation (called waveforms B, C and D). The minimum breakdown voltages (Vmin) under experimental waveforms are higher than Vmin under the standard lightning impulse voltage. The evaluation method, which deals duration applied over 80% of peak voltage and conversion factor for second waves of waveform B, can estimate the insulation characteristics under waveforms B, C and D.
社団法人電気学会の論文
2003-10-01