CAJ | 학술논문

已有的冲击接地试验研究表明,冲击电流入地后地中电场分布决定了接地装置的散流性能。从改善冲击散流时地中电场分布的角度进行冲击接地模拟试验研究,可提高接地装置冲击散流效率,降低接地装置冲击接地阻抗,为高土壤电阻率地区的防雷降阻措施提供新的解决思路。因此基于相似准则,对单根水平接地体和星型水平接地体在两种土壤电阻率下的冲击散流规律进行了模拟试验,并根据试验结果利用针刺状导体改善了接地体冲击散流时的地中电场分布。改善后的冲击接地试验结果表明,基于冲击散流时地中电场分布的接地装置改善措施,能够起到较明显降低冲击接地阻抗的效果,且冲击降阻的效果受冲击电流幅值和接地体结构布置的影响。
이유적충격접지시험연구표명,충격전류입지후지중전장분포결정료접지장치적산류성능。종개선충격산류시지중전장분포적각도진행충격접지모의시험연구,가제고접지장치충격산류효솔,강저접지장치충격접지조항,위고토양전조솔지구적방뢰강조조시제공신적해결사로。인차기우상사준칙,대단근수평접지체화성형수평접지체재량충토양전조솔하적충격산류규률진행료모의시험,병근거시험결과이용침자상도체개선료접지체충격산류시적지중전장분포。개선후적충격접지시험결과표명,기우충격산류시지중전장분포적접지장치개선조시,능구기도교명현강저충격접지조항적효과,차충격강조적효과수충격전류폭치화접지체결구포치적영향。
The simulative impulse grounding research aiming at improving the electric field distribution induced by the grounding current can increase the impulse current dispersion efficiency of the grounding devices,reduce the impulse grounding impedance,and provide a new solution for resistance reduction in areas with high soil resistivity.Consequently,based on the similarity principle,the simulation experiment is carried out to analyze the impulse current diffuser regulation of the single and star horizontal electrodes under the condition of two different soil resistivity,thereby,from the tests results,the electric field distribution induced by the grounding current is improved by the implementation of needle-shaped conductors.The impulse grounding experiment demonstrates that the improved grounding solution based on electric field distribution induced by the dispersion of the grounding current has a positive effect on reducing the impulse ground impedance.Furthermore,amplitude of impulse current as well as configuration of grounding device have a significant impact on the effect of impulse impednace reduction.