Abstract
In this paper, the impact resistance reduction of spark effect is analyzed, an equivalent radius iteration method considering radial and end spark effect is proposed, and the necessity of this radius iteration method is clarified and verified. This paper analyzes the impact of adding spark spike short conductor to grounding device on impulse resistance reduction. Through simulation calculation, the following conclusions are drawn: adding spark spike has obvious effect on reducing impulse grounding resistance; for horizontal grounding body, adding spark spike at end current injection point has the best resistance reduction effect, because of large leakage current at end and strong spark effect; adding spark spike on one side has the best resistance reduction effect The effect of spark prick is better than that of double-sided spark prick, because double-sided spark prick or shielding effect can weaken the spark effect.
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