摘要
输电线路覆冰灾害危害整个电网安全稳定运行。为解决现有输电导线等值覆冰厚度测量中设备的可靠性较差,设备运行环境复杂,测量方法繁琐等问题,开发了一套基于光学成像原理和测距原理的一体化、便携式测量导线覆冰厚度的装置。从激光测距和十字分划测距的基本方程出发,推导了根据观测距离和密位值来计算输电导线等值覆冰厚度的方法,同时也介绍了利用该装置测量观测距离和密位值的方法。对于固定装置、观测距离、环境光线强弱对观测冰厚影响的问题,通过对比不同条件下观测导线覆冰情况的实验数据发现了一系列对于提高了测量结果准确性有益的结论。文章还从系统误差入手,深入剖析了实验结果中误差的来源,得到了该测量输电导线覆冰厚度的装置在中、近距离以及导线有8mm以上冰厚时能有效观测冰厚的结论,这与实验中得到的结论一致。
The ice-coved transmission lines endanger the safe and stable operation of power grid. In order to solve the problems of the poor reliability of devices used in the measuring of equivalent ice-covered thickness of the existing transmission line,the complex equipment running environment,and the complex measuring method,a set of devices is developed based on the integration of optical imaging and ranging principle which can measure the ice-covered thickness of transmission line portably. The calculating method for the equivalent ice-covered thickness is derived according to the observation distance and the mil value from the basic principle of laser ranging and cross division ranging. Meanwhile,the measuring method of the observation distance and the mil value is introduced in this paper.Considering the fixture,observation distance and ambient light intensity,a series of useful conclusions for enhancing the accuracy are obtained by comparing the experimental data of the ice-covered transmission line under the different conditions. The source of error in experimental results is analyzed in detail taking the view of system error,and the conclusion that the device of measuring the ice-covered thickness could observe the ice-covered thickness efficiently in moderate and short distance when the ice-covered thickness reaches 8mm has been obtained,which is consistent with the experiments conclusion.
出处
《电测与仪表》
北大核心
2015年第2期105-111,共7页
Electrical Measurement & Instrumentation
关键词
覆冰
输电线路
测量方法
等值覆冰厚度
误差
ice coverage
transmission line
measuring method
equivalent ice-covered thickness
error
作者简介
武剑（1984-），男，工程师，从事输电线路运维检修工作。Email：328622257@qq．com
刘佳（1978-），女，高级工程师，从事变电运行工作。
张午阳（1979-）。男，工程师，从事输电线路运维检修工作。
陈荣勇（1968-），男，工程师，从事输电线路运维检修工作。
郑凯（1974-），男，高级工程师，从事输电线路运维检修工作。
周双勇（1984-），男，工程师，从事输电线路运维检修工作。
李成祥（1979-），男，博士，讲师，从事高电压新技术研究。
姚陈果（1975-），男，四川人，教授，博士生导师，从事电气设备在线监测与故障诊断技术、生物医学的电工新技术及高电压新技术研究。
