基于正交设计法的220kV同塔双回输电线路反击耐雷水平影响因素

发布时间：2018-08-24 13:44

【摘要】：为合理选择输电线路的防雷措施,基于数理统计中的正交设计(OED)方法,以某220 kV同塔双回线路为例,分析了不同防雷措施对线路反击耐雷水平的提升效果,并对其进行量化处理和权重划分,通过显著性水平F值来表征。计算结果表明,降低杆塔接地电阻、加强线路绝缘、架设避雷线、架设耦合地线、安装线路型避雷器这5种影响因素对线路反击耐雷水平的提升总效应值为14 918,各因素的效应值分别为874、710、357、215、12762,显著性水平F值之比为4.07:3.30:1.66:1.00:59.36。当杆塔接地电阻从15Ω降到10Ω、绝缘子片数从15片增加到16片时,线路反击耐雷水平的提升效果最显著。加装线路型避雷器前后,线路的反击耐雷水平分别在64.2~111.9 kA和140.4~173.7 kA之间。
[Abstract]:In order to reasonably select the lightning protection measures of transmission lines, based on the orthogonal design (OED) method in mathematical statistics, taking a 220 kV double-circuit transmission line as an example, this paper analyzes the effect of different lightning protection measures on the anti-lightning level of the transmission line. The quantification and weight division were carried out, and the significant level F value was used to characterize it. The calculation results show that the grounding resistance of the tower is reduced, the insulation of the line is strengthened, the lightning protection line is erected, and the coupling ground wire is set up. The total effect value of these five influencing factors on the lightning resistance level of the line is 14 918, and the effect value of each factor is 874 / 710 / 357N / 215/ 12762, respectively, and the ratio of the significant level F is 4.07: 3.301.66: 1.00: 1.00: 59.366.The total effect value of these five factors is 14 918, and the effect value of each factor is 874 / 710 / 357N / 215762 / 12762, respectively. When the grounding resistance of the tower is reduced from 15 惟 to 10 惟, and the number of insulators increases from 15 to 16, the effect of the line anti-lightning level is most remarkable. Before and after the line arrester is installed, the lightning resistance level of the line is between 64.2 kA and 173.7 kA.
【作者单位】：重庆大学输配电装备及系统安全与新技术国家重点试验室;国网重庆市电力公司检修分公司;
【基金】：国家创新研究群体基金(51021005)~~
【分类号】：TM862

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