発変電所における低圧制御回路に発生する過電圧の実験的検討

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書誌事項

タイトル別名
  • Expertimental Study of Overvoltages in Low-Voltage Control Circuit of Power Stations and Substations
  • ハツヘンデンショ ニ オケル テイアツ セイギョ カイロ ニ ハッセイスル カ
公開日
1997
DOI
  • 10.1541/ieejpes1990.117.7_1039
公開者
一般社団法人 電気学会

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説明

Low-voltage control circuits of power stations and substations have a very important role to maintain the high quality and reliability of electric power systems. Digital circuits are widely used in the low-voltage control circuits by introducing integrated circuits. Operation voltages and the insulation level of the control circuits are much smaller than power-frequency voltages and the insulation level of the main circuits. Thus, faults and troubles in the control circuits increase nevertheless those in the main circuits decrease.<br> A study on the control circuits is focused on the effective and accurate operation of the power systems by the use of the control circuits. The insulation design of the control circuits, however, has not been investigated satisfactorily. Then, this paper presents measured overvoltages in a low-voltage control circuit model consisting of a control cable and control pannels installed on a grounding net for a lightning impulse voltage being applied on a main circuit consisting of a surge arrester and a potential divider.

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