机载LiDAR辅助下高压直流输电线路档侧弧垂检测方法研究  

Research on Detection Method of Arc Droop on Stall Side of High-Voltage Direct Current Transmission Lines with Assistance of Airborne LiDAR

作　　者：张天毅 刘茹 王静峰 ZHANG Tianyi;LIU Ru;WANG Jingfeng(Digital Communication Department,State Grid Lanzhou Power Supply Company,Lanzhou 730000,China;Yuzhong County Power Supply Company,State Grid Lanzhou Power Supply Company,Lanzhou 730000,China)

机构地区：[1]国网兰州供电公司数字化通信部,甘肃兰州730000 [2]国网兰州供电公司榆中县供电公司,甘肃兰州730000

出　　处：《自动化仪表》2024年第12期49-53,61,共6页Process Automation Instrumentation

基　　金：国网甘肃省电力公司科技基金资助项目(B32701220007)。

摘　　要：进行高压直流输电线路档侧弧垂检测时,由于未进行输电线路建模,导致检测精度较低。对此,提出机载激光探测及测距(LiDAR)系统辅助下高压直流输电线路档侧弧垂检测方法。首先,对采用机载LiDAR获取的高压直流输电线路点云数据进行离群点滤波处理。其次,通过高程阈值与格网高差提取滤波处理后的线路点云数据,以此建立高压直流输电线路模型。接着,通过高压直流输电线路模型、考虑不同工况的载荷条件,计算线路在不同工况下对应的许用应力与比载,以确定有效临界档距。最后,根据计算得到的应力结果,在高压输电线路模型上模拟档侧弧垂曲线。将模拟的档侧弧垂曲线与实际观测到的弧垂数据进行对比,以实现弧垂检测。试验结果表明,所提方法在不同工况下展开弧垂检测的误差均值控制在0.02以内。该方法具有实用性。The detection accuracy is low due to the lack of transmission line modeling when performing arc droop detection on stall side of high-voltage direct current transmission lines.In this regard,an airborne lightlaser detection and ranging(LiDAR)system-assisted high-voltage direct current transmission line stall side arc droop detection method is proposed.Firstly,outlier filtering is performed on the point cloud data of high-voltage direct current transmission lines acquired by airborne LiDAR.Secondly,the filtered line point cloud data is extracted by elevation threshold and grid height difference to establish the high-voltage direct current transmission line model.Then,through the high-voltage direct current transmission line model,the allowable stresses and specific loads corresponding to the line under different working conditions are calculated by considering the loading conditions under different working conditions,to determine the effective critical distance.Finally,based on the calculated stress results,the stall side arc droop curve is simulated on the high-voltage transmission line model.The simulated stall side arc droop curve is compared with the actual observed arc droop data to realize arc droop detection.The test results show that the proposed method under different working conditions to expand the arc droop detection error is controlled in the average value of 0.02 or less.This method is practical.

关 键 词：机载激光探测及测距系统 高压直流输电线路 点云滤波 有效临界档距 弧垂检测 

分 类 号：TH165[机械工程—机械制造及自动化]