消雷器电晕电流的测量和理论分析

迄今为止,“消雷器”产生的电晕电流及其“消雷”机理尚有争论。本文利用一种“消雷器”实测电晕电流和电场强度,并根据一次闪电后地面电场恢复特征,从理论上估算了恢复时段内电晕电流密度。结果表明,即使在电场恢复到较为稳定的时刻,测量值仍比理论值约大一个量级,而理论值和地面自然尖端产生的电晕电流在量级上相当,“消雷器”产生的电晕电流不会高于自然尖端的作用。此外,“消雷器”结构（强局地表面电场、较大电晕有效面

CORONA CURRENT MEASUREMIENT AND THEORETICAL ANALYSIS OF "Lightning eliminator

Until now,the corona current produced by"Lightning eliminator" and the eliminating principle of the"lightning eliminator"have being unknown question.In this paper, based on the measurement of corona current and electric field produced by "lightning eliminator", corona current density during recovery of electric field was eval- uated on the theoretical from recovery characteristic of electric field on the ground after the lightning. The results show that even if the electric field reached to stable stage,measured value is an order larger than theoretical value.However, theoretical value is as same order of magnitude as corona current caused by natural point on the ground. The corona current caused by"lightning eliminator"is not stronger than that of the natural point. In addition, the structure of"lightning eliminator"(stronger local sur- face eletric field and bigger corona effective area) can amplify the smaller change of elec- tric field in the air. Therefore,the displacement current was increased. So the function of corona current on eliminating principle is not evident.