| 引用本文: | 麻卫峰,王 成,王金亮,等.点云数据温度变化环境下输电线形态模拟[J].电力系统保护与控制,2021,49(9):90-96.[点击复制] |
| MA Weifeng,WANG Cheng,WANG Jinliang,et al.Shape simulation for a transmission line under different temperatures based on point cloud data[J].Power System Protection and Control,2021,49(9):90-96[点击复制] |
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| 点云数据温度变化环境下输电线形态模拟 |
| 麻卫峰1,2,3,王成1,4,王金亮1,2,3,麻源源5 |
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| (1.云南师范大学旅游与地理科学学院，云南 昆明 650500;2.云南省高校资源与环境遥感重点实验室，
云南 昆明 650500;3.云南省地理空间信息工程技术研究中心，云南 昆明 650500;4.中国科学院空天信息
创新研究院数字地球重点实验室，北京 100094;5.武汉大学中国南极测绘研究中心，湖北 武汉 430079) |
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| 摘要: |
| 气温是影响架空输电线路电气间距和机械强度的主要气象参数之一。针对当前输电线路实时工况运营状态安全监测的需求，基于机载激光点云数据，提出了一种线路环境温度变化下架空输电线空间形态模拟及精度验证方法。首先利用点云数据重建输电线空间模型并提取初始温度下输电线水平应力，然后根据状态方程求解模拟温度下输电线水平应力。最后根据静力平衡原理实现输电线空间形态模拟，并提出了两期激光点云交叉验证方法验证模拟结果的可靠性和准确性。选择具有典型代表性的输电线点云数据进行试验，结果表明：该方法能很好地实现任意温度变化环境下架空输电线空间形态模拟，模拟中误差0.027，平均误差0.066 m，最大误差0.471 m。研究为机载激光雷达电力巡检及高压输电线路设计提供参考价值。 |
| 关键词: 气温 架空输电线 点云 弧垂 交叉验证 |
| DOI：DOI: 10.19783/j.cnki.pspc.200873 |
| 投稿时间：2020-07-21修订日期：2020-10-12 |
| 基金项目:国家自然科学基金项目资助“联合ULS与TLS点云数据的滇西北天然林单木生物量估算研究”(41961060) |
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| Shape simulation for a transmission line under different temperatures based on point cloud data |
| MA Weifeng1,2,3,WANG Cheng1,4,WANG Jinliang1,2,3,MA Yuanyuan5 |
| (1. College of Tourism and Geographic Sciences, Yunnan Normal University, Kunming 650500, China; 2. Key Laboratory of
Resources and Environmental Remote Sensing for Universities in Yunnan, Kunming 650500, China; 3. Center for Geospatial
Information Engineering and Technology of Yunnan Province, Kunming 650500, China; 4. Key Laboratory of
Digital Earth Science, Aerospace Information Research Institute, China Academy of Sciences, Beijing 100094, China;
5. Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China) |
| Abstract: |
| Air temperature is one of the main meteorological parameters that affect the electrical distance and mechanical strength of overhead transmission lines. Given the need for real-time operation state safety monitoring of overhead transmission lines, a method of spatial shape simulation and accuracy verification of the lines under environmental temperature changes is proposed. It is based on airborne LiDAR point cloud. First, the spatial model of a transmission line is constructed using point cloud, and the horizontal stress of the transmission line at the initial temperature is extracted. Then, the horizontal stress of the line under simulated temperatures is solved according to the state equation. Finally, the spatial shape simulation of a transmission line is realized according to the principle of static balance. A two-phase cross validation method of excitation point cloud is proposed to verify the reliability and accuracy of the simulation results. The typical point cloud data of transmission lines are selected for test. The results show that the method can well simulate the spatial shape of overhead transmission lines under any temperature change environment. The simulation error is 0.027, the average error is 0.066 m, and the maximum error is 0.471 m. The research provides reference value for airborne LiDAR power inspection and high voltage transmission line design.
This work is supported by the National Natural Science Foundation of China for the “Natural Forests Biomass Estimation at Tree Level in Northwest Yunnan by Combining ULS and TLS Cloud Points Data” (No. 41961060). |
| Key words: air temperature overhead transmission line point cloud sag cross validation |
