线激光清除架空线路树障时温度和效率分析

doi:10.11930/j.issn.1004-9649.202004059

中国电力 ›› 2022, Vol. 55 ›› Issue (5): 94-101.DOI: 10.11930/j.issn.1004-9649.202004059

线激光清除架空线路树障时温度和效率分析

徐鑫¹, 方春华¹, 智李¹, 丁璨¹, 董晓虎², 程绳², 孙维¹, 陶玉宁¹

1. 三峡大学电气与新能源学院，湖北宜昌 443002;
2. 国网湖北省电力公司检修公司，湖北武汉 430000

收稿日期:2020-04-09 修回日期:2021-08-06 出版日期:2022-05-28 发布日期:2022-05-18
作者简介:徐鑫(1996—)，男，硕士研究生，从事激光与输电线路树障清除技术研究，E-mail：nixux4@163.com;方春华(1980—)，男，博士，副教授，从事高电压绝缘与在线监测技术研究，E-mail：fang107531@163.com;智李(1983—)，女，通信作者，硕士，讲师，从事电力系统运行与控制研究，E-mail：zhiwanzhili@126.com
基金资助:
国家自然科学基金资助项目(大型悬浮电位导体对空气间隙操作冲击放电特性的影响机制及调控研究，51807110)

Temperature and Efficiency Analysis of Line Laser in Removing Tree Barriers for Overhead Lines

XU Xin¹, FANG Chunhua¹, ZHI Li¹, DING Can¹, DONG Xiaohu², CHENG Sheng², SUN Wei¹, TAO Yuning¹

1. College of Electrical Engineering and New Energy, Three Gorges University, Yichang 443002, China;
2. State Grid Hubei Electric Power Co., Ltd. Maintenance Company, Wuhan 430000, China

Received:2020-04-09 Revised:2021-08-06 Online:2022-05-28 Published:2022-05-18
Supported by:
This work is supported by National Natural Science Foundation of China (Influence Mechanism and Regulation of Large Suspended Potential Conductor on Switching Impulse Discharge Characteristics in Air Gap, No.51807110)

摘要/Abstract

摘要： 架空线路树障会引起线路跳闸故障，是线路运行的重大隐患。采用高能激光清除架空输电线路下方树障是一种安全有效的清障方式。以6种典型树木类型为研究对象，建立有限元模型，分析点、线激光作用下6种树木的温度分布规律及灼烧效率并进行了点、线激光灼烧实验。结果表明，线激光照射时，树木表面温度从光斑中心向光斑边缘急剧降低，仅在灼烧中心区域热效应明显，光斑中心温度上升速率随加热时间逐渐减缓。同样时间内，泡桐相较于其他5种树木的温度最大，15 s时最高温度达到1259.20 ℃。激光器输出功率相同时，点激光平均灼烧速度为0.37 mm/s，线激光为5.45 mm/s，实验对比发现线激光效率为点激光效率的6.53~8.45倍，线激光平均灼烧速度明显大于点激光，此研究成果为线激光器应用于清障工作提供了重要依据。

关键词: 点激光, 线激光, 树障, 灼烧效率, 输电线路

Abstract: Overhead line tree barriers may cause line tripping faults and are a major hidden danger to line operation. It is a safe and effective way to remove the tree barriers under the transmission lines by high energy laser. By taking six types of typical trees as the research objects, finite element models are established to analyze the temperature distribution characteristics and burning efficiency of these trees under point and line laser cauterization, and point and line cauterization experiments are conducted respectively. The results show that the temperature of the tree surface decreases sharply from the the laser spot center to the spot edge, and the thermal effect is only obvious in the center of the burning area, and the temperature rising rate at the spot center slows down with the heating time. Within the same time period, compared to other five tree types, Paulownia has the highest temperature, reaching 1259.20 °C at maximum in 15 s. When the output power of laser is the same, the point laser and line laser have an average burning speed of 0.37 mm/s and 5.45 mm/s, respectively. The experimental results show that the line laser is 6.53-8.45 times faster than the point laser in average burning speed, which indicates that the line laser has a significantly higher burning speed than that of point laser. The research results can provide an important basis for application of line laser in clearing tree barriers.

Key words: point laser, line laser, tree barrier, burning efficiency, transmission line

徐鑫, 方春华, 智李, 丁璨, 董晓虎, 程绳, 孙维, 陶玉宁. 线激光清除架空线路树障时温度和效率分析[J]. 中国电力, 2022, 55(5): 94-101.

XU Xin, FANG Chunhua, ZHI Li, DING Can, DONG Xiaohu, CHENG Sheng, SUN Wei, TAO Yuning. Temperature and Efficiency Analysis of Line Laser in Removing Tree Barriers for Overhead Lines[J]. Electric Power, 2022, 55(5): 94-101.

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线激光清除架空线路树障时温度和效率分析

Temperature and Efficiency Analysis of Line Laser in Removing Tree Barriers for Overhead Lines

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线激光清除架空线路树障时温度和效率分析

Temperature and Efficiency Analysis of Line Laser in Removing Tree Barriers for Overhead Lines

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