输电线路覆冰在线监测系统国内外研究综述

Review of On-line Monitoring System of Ice Coating on Transmission Lines

输电线路覆冰会影响电网的安全稳定运行,国内外对于输电线路覆冰在线监测进行了很多研究,笔者旨在分析当前覆冰在线监测系统的研究成果。首先,讲述了国内外关于输电线路覆冰过程预测的模型,包括基于热力学机理、流体力学机理和实测数据模拟等建立起的数学模型,并分析对比了其优缺点;其次,介绍了目前覆冰导线在线监测技术,包括视频监测技术、力学载荷计算监测覆冰厚度、倾角变化监测弧垂等技术;最后,指出了现有覆冰监测技术的一些不足之处,并提出了一些改进意见。

Ice coating on transmission lines harms the safe and stable operation of power grids. This paper introduces the existing prediction models of icing process on transmission lines, including the mathematical models based on the mechanism of thermodynamics, the mechanism of fluid mechanics, and the measured data simulation, analyzes and compares their advantages and disadvantages. And this paper discusses the on-line monitoring technologies of iced conductors, such as the video surveillance technology, the ice thickness monitoring technology via calculation of mechanical load, the sag of line monitoring technology via calculation of inclination variation. In addition, some insufficiencies in the existing ice coating monitoring technologies are argued, and some improvements are suggested.