CAJ | 학술논문

在运复合材料杆塔线路笼统采用逐基杆塔引下线接地的方式,增加投资费用,防雷性能裕度过大,而完全取消引下线又难以保障杆塔的安全运行,为此提出一种优化接地方式的方法.在计算杆塔耐雷水平和雷击跳闸率后,以雷击跳闸考核指标为参考依据,提出考虑杆塔地形环境、雷电活动等因素的接地方式配置实施流程,在保证技术性的前提下,提高经济性,确定合理的接地杆塔数量.对实际线路中的3个典型区段的配置结果表明,优化的方法较全线逐基接地分别减少使用 1/2、2/3、1/3 的接地引下线,同时满足考核指标,对工程应用具有较大的参考价值.
재운복합재료간탑선로롱통채용축기간탑인하선접지적방식,증가투자비용,방뢰성능유도과대,이완전취소인하선우난이보장간탑적안전운행,위차제출일충우화접지방식적방법.재계산간탑내뢰수평화뢰격도갑솔후,이뢰격도갑고핵지표위삼고의거,제출고필간탑지형배경、뇌전활동등인소적접지방식배치실시류정,재보증기술성적전제하,제고경제성,학정합리적접지간탑수량.대실제선로중적3개전형구단적배치결과표명,우화적방법교전선축기접지분별감소사용 1/2、2/3、1/3 적접지인하선,동시만족고핵지표,대공정응용구유교대적삼고개치.
It turns out to be redundant in lightning protection performance and increases investment cost when grounding for each composite material tower(CMT) on transmission lines, while completely cancellation of grounding cannot guarantee safety operation of tower. Therefore it is meaningful to propose a new way to optimize grounding. An implementation process of configuring grounding which takes the factors such as terrain conditions and lightning activities into account is developed in this paper, which iteratively computes lightning withstanding level and lightning trip-out rate(LTOR) of CMT before comparing it with the examination index until obtaining a rational grounding scheme, thus improving the economic efficiency on the premise of technical indicator. An application of it to 3 typical sections of a transmission line shows that optimized method has reduced the usage of downward ground wire respectively by 1/2、2/3、1/3 than the case of grounding each tower while meeting the operating requirement. The achievement of this paper has great reference value for engineering applications.