CAJ | 학술논문

我国学者尝试在雷电活动强烈、污秽严重地区的110 kV架空线路应用复合材料绝缘杆，以提高相对地空气间隙距离和爬电距离。然而绝缘水平的提高，复合材料杆还是否需要架设避雷线以及避雷线接地引下线，是防雷面临的关键技术问题之一。针对典型110 kV复合材料杆，对比研究未架设避雷线的复合材料杆与架设避雷线的同电压等级、相同导线高度铁塔线路的雷电性能，考虑2种杆塔线路引雷能力、雷电冲击绝缘强度以及建弧率等因素的差异，发现：2种杆塔线路引雷能力间的差异可以忽略；未架设避雷线的复合材料杆雷电冲击绝缘强度是铁塔的3.5倍，建弧率为铁塔的53%，但是反击耐雷水平仅为24.5 kA，雷击跳闸率高达1.13次/(100 km?a)，均明显劣于铁塔。据此，推荐110 kV复合材料杆架设避雷线。然后，对比估算避雷线不同接地方案下雷电性能的差异发现：避雷线若不经引下线接地，则复合材料杆雷电性能明显劣于铁塔，但若经引下线逐杆接地，则雷电性能显著优于铁塔。因此，提出避雷线应逐杆接地。综上所述，110 kV 复合材料杆线路防雷接地方案应当采用架设避雷线，且通过金属引下线逐杆接地的设计。
아국학자상시재뇌전활동강렬、오예엄중지구적110 kV가공선로응용복합재료절연간，이제고상대지공기간극거리화파전거리。연이절연수평적제고，복합재료간환시부수요가설피뢰선이급피뢰선접지인하선，시방뢰면림적관건기술문제지일。침대전형110 kV복합재료간，대비연구미가설피뢰선적복합재료간여가설피뢰선적동전압등급、상동도선고도철탑선로적뇌전성능，고필2충간탑선로인뢰능력、뇌전충격절연강도이급건호솔등인소적차이，발현：2충간탑선로인뢰능력간적차이가이홀략；미가설피뢰선적복합재료간뇌전충격절연강도시철탑적3.5배，건호솔위철탑적53%，단시반격내뢰수평부위24.5 kA，뢰격도갑솔고체1.13차/(100 km?a)，균명현렬우철탑。거차，추천110 kV복합재료간가설피뢰선。연후，대비고산피뢰선불동접지방안하뇌전성능적차이발현：피뢰선약불경인하선접지，칙복합재료간뇌전성능명현렬우철탑，단약경인하선축간접지，칙뇌전성능현저우우철탑。인차，제출피뢰선응축간접지。종상소술，110 kV 복합재료간선로방뢰접지방안응당채용가설피뢰선，차통과금속인하선축간접지적설계。
It is attempted for Chinese scholars to apply insulation pole composed of composite material in the erection of 110 kV overhead transmission lines located at the regions with strong lightning activity and/or serious pollution to enhance the phase-to-ground air gap distance and creepage distance effectively. However, with the enhancement of insulation level whether the overhead ground wire should be erected on the composite material pole as well as its grounding downlead should be equipped are key problems that the lightning protection technology has to be faced with. As to the composite material pole for 110 kV transmission lines, the lightning performances of transmission line erected on it without overhead grounding wire and those of 110 kV transmission line erected on the steel tower with the same conductor heights are contrasted and researched, and considering the differences in such factors as lightning attracting ability, lightning impulse dielectric strength and probability of sustained arc between the two kinds of transmission lines it is found that the difference in the lightning attracting ability between the two kinds of transmission lines can be neglected; the lightning impulse dielectric strength of composite material pole without overhead grounding wire is higher than that of steel tower by 3.5 times and the probability of sustained arc of the former is only 53% of the latter, however, the lightning withstand level of the former is only 24.5 kA and the lightning outage rate of the former reaches up to 1.13 times/(100 km?a), and the two indices of composite material pole are obviously worse than those of steel tower. For reasons given above, it is recommended to erect overhead ground wire on composite material poles. Besides, through comparing the estimated results of the differences of lightning performances under various grounding schemes it is found that if the overhead ground line erected on the composite material pole is not grounded via the grounding downlead, the lightning performance of composite material pole is evidently worse than that of steel tower, therefore it is proposed that the overhead ground wire erected on the composite material pole should be grounded one after another. In conclusion, during the design of lightning protection and grounding scheme for 110 kV transmission line erected on composite material poles the overhead ground wire should be erected and the grounding of the overhead ground wire should be grounded via metal downlead one after another.