CAJ | 학술논문

为研究雷击杆塔时经接地体泄散的雷电流在杆塔周围地面产生的电位分布及其影响，采用模拟试验的方法，在半球形接地池中对不同幅值冲击电流作用条件下几种典型形状杆塔接地极周围的地面电位分布特性进行了试验研究，测得了相应的等电位分布曲线。将所得电位分布曲线按模拟比进行换算后，估算出接地极附近地面可能作用于人体的暂态跨步电压。通过对比现有雷电流幅值概率分布的研究结果得到：雷击杆塔时有较大概率在杆塔周围地面形成可能危及人身安全的暂态跨步电势。该结论对杆塔接地体的结构设计、改进及人口密集的城市地段的杆塔安全防范措施的制定具有指导意义。
위연구뢰격간탑시경접지체설산적뇌전류재간탑주위지면산생적전위분포급기영향，채용모의시험적방법，재반구형접지지중대불동폭치충격전류작용조건하궤충전형형상간탑접지겁주위적지면전위분포특성진행료시험연구，측득료상응적등전위분포곡선。장소득전위분포곡선안모의비진행환산후，고산출접지겁부근지면가능작용우인체적잠태과보전압。통과대비현유뇌전류폭치개솔분포적연구결과득도：뢰격간탑시유교대개솔재간탑주위지면형성가능위급인신안전적잠태과보전세。해결론대간탑접지체적결구설계、개진급인구밀집적성시지단적간탑안전방범조시적제정구유지도의의。
We researched the potential distribution of grounding electrode under impulse current and its influence by simulation. The test area was in a hemispherical grounding pool, the impulse current of different amplitudes was ap plied to the grounding electrodes of some representative structures, and the potential distribution curves around the grounding electrodes were measured to understand the characteristics of potential distribution. Converting the potential distribution curve by simulation scaling factors, the transient step voltage near the grounding electrodes could be estimated. According to the existing probability distribution of lightning current amplitude, the conclusion can be drawn that there is a larger probability to form a dangerous transient step potential on the surroundings ground of tower stroke by lightning, which is useful for the design and improvement of grounding electrodes and for formula ting security protection measures of grounding electrodes in the urban areas.