基于改进Messinger覆冰模型导线防冰临界电流计算及其影响因素分析  

Caculation and Influencing Factors Analysis of Conductor Anti-Icing Critical Current Based on Improved Messinger Icing Model

作　　者：刘国特[1,2] 郝艳捧[1] 阳林[1] 陈彦[1] 钟荣富 Liu Guote;Hao Yanpeng;Yang Lin;Chen Yan;Zhong Rongfu(School of Electric Power South China University of Technology Guangzhou 510640 China;Dongguan Power Supply Bureau Guangdong Power Grid Corporation Dongguan 523000 China)

机构地区：[1]华南理工大学电力学院,广州510640 [2]广东电网公司东莞供电局,东莞523000

出　　处：《电工技术学报》2016年第18期176-183,共8页Transactions of China Electrotechnical Society

基　　金：国家高科技研究发展计划(863计划)(2011AA05A120);国家自然科学基金面上项目(51177052)资助

摘　　要：为了得到不同覆冰气象条件下导线防冰临界电流,基于电流防冰时导线表面水膜流动,建立导线表面水膜流动模型对Messinger覆冰模型进行改进,确定了过冷水滴局部撞击系数(LCC)、导线表面局部对流换热系数(LHTC)与导线表面液态水局部冻结系数(LFC)计算方法。首次计算导线表面LHTC与LFC,并基于LFC计算结果,实现了导线防冰临界电流自动计算。计算结果表明:导线表面LCC、LHTC和LFC在导线驻点位置达到最大值,其中LFC随电流增大而减小;风速、温度是影响防冰临界电流的主要因素,含水量与水滴直径大小对临界电流没有明显影响。This paper improves the Messinger icing model by establishing the water film flowmodel on conductor surface based on the water film flowing on conductor surface during the currentanti-icing periods, to obtain the conductor anti-icing critical current under different icingmeteorological conditions. The calculation methods about the local collision coefficient (LCC) ofsuper-cooled water droplets, the local heat transfer coefficient (LHTC) on conductor surface and thelocal freezing coefficient (LFC) of liquid water on conductor surface are determined. It is the first timeto calculate the LHTC and LFC on conductor surface. Moreover, the automatic computation ofconductor anti-icing critical current is achieved based on the calculated LFC. The results show that theLCC, LHTC and LFC on conductor surface reach their maximum values in the position of conductorstagnation point, where the LFC decreases with increasing the conductor current. Wind speed andtemperature are the main factors affecting the anti-icing critical current, while the water content and thediameter size of droplet have little effects on the critical current.

关 键 词：导线覆冰 防冰 临界电流 局部撞击系数 局部冻结系数 控制体 

分 类 号：TM216[一般工业技术—材料科学与工程]