摘要
伴随着社会的发展,人们生活质量和生活水平逐步提高,对电力和信息的需求越来越多,随着电力和信息的建设越来越多,电力和信息设施需要占用的空间随之增多,为了节约用地,电力线路选择的地址尽可能避开有用的地理位置,所以架空输电线路很大一部分需要在各种气候条件下运行,包括寒冷地区、高海拔地区等,这些地方都可能存在极端环境。并且随着气候的变化,一些地方也发生了极端天气,例如2008年,全国先后3次出现大范围持续时间长的雨雪冰冻天气,对我国西南、华中、华南、华东地区的电网运行造成了重大危害。2023年我国经历了近年来最强雨雪冰冻灾害,范围涵盖14省(市),山东、河南等不易覆冰省份均出现严重覆冰;在这种低温和覆冰的环境下架空输电线路会受到重冰、大风的作用,易造成导线断裂和金具破坏。在电杆和导线的材料选择上,需要考虑其抗氧化、耐腐蚀、耐寒性等特性,以确保在极端气候条件下的可靠运行。
With the development of society,people's quality of life and living standards are gradually improving,and there is an increasing demand for electricity and information.With the construction of electricity and information,the space required for electricity and information facilities is increasing.In order to save land,the addresses selected for power lines should avoid useful geographical locations as much as possible.Therefore,a large part of overhead transmission lines needs to operate under various climatic conditions,including cold areas,high-altitude areas,etc.,where extreme environments may exist.And with climate change,some places have also experienced extreme weather.For example,in 2008,there were three large-scale and long-lasting rainy,snowy,and freezing weather events in China,which caused significant harm to the operation of the power grid in Southwest,Central,South,and East China.In 2023,China experienced the strongest rain,snow,and freezing disasters in recent years,covering 14 provinces(cities).Provinces such as Shandong and Henan that are not prone to icing have all experienced severe icing;In such low temperature and icy environments,overhead transmission lines are susceptible to heavy ice and strong winds,which can easily cause wire breakage and hardware damage.In the selection of materials for poles and wires,it is necessary to consider their characteristics such as oxidation resistance,corrosion resistance,and cold resistance to ensure reliable operation under extreme weather conditions.
出处
《现代传输》
2024年第5期26-28,共3页
Modern Transmission
关键词
电力和信息
低温
极端天气
金具
electricity and information
low-temperature
extreme weather
fittings
