阈值除冰机制下山地输电线路安全服役可靠度研究  

Research on Safe Service Reliability of Mountain Transmission Lines Under Threshold Deicing Mechanism

作　　者：宋欣欣 陈波[2] 昌明静 SONG Xinxin;CHEN Bo;CHANG Mingjing(School of Architectural Engineering,Huanggang Normal University,Huanggang,Hubei 438000,China;Sanya Science and Education Innovation Park of Wuhan University of Technology,Sanya,Hainan 572024,China;School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan,Hubei 430070,China)

机构地区：[1]黄冈师范学院建筑工程学院,湖北黄冈438000 [2]武汉理工大学三亚科教创新园,海南三亚572024 [3]武汉理工大学土木工程与建筑学院,湖北武汉430070

出　　处：《广东电力》2024年第11期83-91,共9页Guangdong Electric Power

基　　金：国家自然科学基金项目(51978549,52278528)。

摘　　要：导线和地线覆冰往往导致山地覆冰区输电线路断线,采用成熟的除冰技术对线路进行除冰是有效的解决办法之一。针对覆冰区域的山地输电线路安全服役问题,对阈值除冰机制下的山地输电线路安全服役可靠性问题进行量化分析与评估。采用含截尾分布的一次二阶矩方法,考虑输电线弧垂最低点和悬挂点,选取除冰阈值、高差角、档距为研究参数,进行阈值除冰机制下山地输电线路可靠度研究。研究表明,高差角和档距是山地输电线安全服役失效概率的显著影响参数;在设定所研究线路除冰阈值时应该重点考虑在10~20 mm区间的取值,在该范围内取值可以兼顾服役安全和除冰次数。The icing of conductors and ground wires often leads to the disconnection of transmission lines in mountainous icing areas.The use of mature deicing technology for line deicing is one of the effective solutions.Aiming at the problem of safe service of mountain transmission lines in the icing areas,this paper quantitatively analyzes and evaluates the reliability of safe service of mountain transmission lines under threshold deicing mechanism.Using the first-order second moment method with truncated distribution,considering the lowest sag point and suspension point of transmission line,it studies the reliability of mountain transmission line under threshold deicing mechanism by selecting deicing threshold,height difference angle and span as research parameters.The results show that the height difference angle and span are the significant influence parameters of the failure probability of mountain transmission lines in safe service.When setting the deicing threshold of the studied line,it should focus on the values within 10~20 mm,which can take into account the service safety and deicing times.

关 键 词：山地输电线路 阈值除冰 截尾分布 高差角 可靠度 

分 类 号：TM752.5[电气工程—电力系统及自动化]