【摘要】 行波沿输电线入侵变电站时，虽然避雷器动作限制了它对一次设备的危害，但经避雷器入地的冲击电流引起接地回路的电位升高。在二次设备中可能产生较大的高频振荡过电压。这一点必须予以重视。更多还原

【Abstract】 Although a lightning arrester can limit the endanger of a teavelling wave on the primary circuit during it intruding into substation along transmission line of power, the surge current through the arrester makes rising of grounding potential.This will causc larger high frequency oscillation overvoltage in the secondary circuit. That must be paid attontion to.更多还原