摘要
输电线路差异化防雷评估技术作为掌握输电线路防雷性能、明确防雷重点的有效方法,已得到各级运行管理部门的认可。地形地貌和杆塔结构作为线路绕击防雷性能的影响因素,是防雷评估时需获取的重要基础参数。为研究获取全档距地形地貌参数和杆塔结构参数的技术,以及将这些参数应用于防雷性能评估的方法,提出基于三维激光扫描数据建立线路走廊三维模型,根据此模型提取差异化防雷评估所需的全档距地形地貌参数和杆塔结构参数,进而进行全档距绕击防雷性能评估。经与山区典型220 kV线路比对,评估结果与实际雷击故障记录吻合良好,充分说明了三维激光扫描技术应用于输电线路差异化防雷治理的有效性。
Regarding as an effective method to master lightning protection performance of transmission lines and clarify effective methods for the key point of lightning protection, the differentiated lightning protection assessment is approved by operation and management departments at all levels. As impacting factors on the protection of shielding failure, terrain and landform and structure of transmission towers is important basic parameters to be acquired for the assessment on lightning protection. To research the technique to acquire terrain and landform parameters of whole spans structural parameters of transmission towers and the method to apply these parameters in the assessment on lightning protection performance, it is proposed that at first based on three-dimensional laser scanning data a three-dimensional model of line corridor should be established; then whole span terrain and landform parameters and structural parameters of transmission towers, which is necessary for differentiated lightning protection assessment, are extracted from the established model; and then the performance of whole span shielding failure protection are extracted from the established model is assessed. Using the proposed method to assess the shielding failure rate of a certain typical 220 kV transmission line located in mountain area and comparing the assessment results with actual record of shielding failure fault of this line, comparison results show that the assessment results well conform to the records of shielding failure fault, thus the effectiveness of the proposed method is verified.
出处
《电网技术》
EI
CSCD
北大核心
2012年第1期195-200,共6页
Power System Technology
基金
国家电网公司科技项目(SG1020)~~
关键词
三维激光扫描
输电线路
差异化防雷
风险评估:
绕击
全档距:地形地貌
杆塔结构
three dimensional laser scanning
transmissionline
differentiated lightning protection
risk assessment
shielding failure
whole span
terrain and landform
towerstructure
