绝缘子表面水滴局部碰撞特性的仿真计算  

Simulation of Local Collision Characteristics of Water Droplets on Insulator

作　　者：韩兴波 蒋兴良[1] 毕聪来 王洋洋[1] 邹佳玉 HAN Xingbo;JIANG Xingliang;BI Conglai;WANG Yangyang;ZOU Jiayu(State Key Laboratory of Power Transmission Equipment&System Security and New Technology, Chongqing University,Chongqing 400044,China)

机构地区：[1]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆400044

出　　处：《南方电网技术》2018年第6期60-65,共6页Southern Power System Technology

基　　金：国家自然科学基金重点项目(51637002)~~

摘　　要：绝缘子覆冰是电力系统不可忽视的灾害之一。为满足当前绝缘子覆冰数值模拟的需求,高效准确地获得绝缘子表面水滴局部碰撞特性是必要的。本文分别采用欧拉-拉格朗日法和欧拉-欧拉法计算了绝缘子表面水滴局部碰撞率β分布,对比分析了两种方法在仿真三维结构水滴碰撞问题上的优劣差异。以普通玻璃绝缘子LXY-120为仿真样品,采用剖切方式,计算分析了不同风速、不同水滴中值直径条件下,绝缘子表面不同位置(绝缘子表面、钢帽、绝缘子伞裙边缘)的水滴局部碰撞率分布特性。结果表明:欧拉-欧拉法和欧拉-拉格朗日计算水滴局部碰撞率的准确度相近,但前者相对于后者在计算三维结构问题时效率更高;绝缘子迎风面β值从两侧向中心逐渐增大,不同剖切面的水滴碰撞范围和最大β值不同;绝缘子钢帽和边缘的β值远大于绝缘子表面,并随风速和MVD的增大而逐渐趋于饱和。The insulator icing is one of the major threats to power network.To satisfy the need of simulation of insulator icing,it s necessary to obtain the local collision efficiency of water droplets on insulator efficiently.Taking advantage of Eulerian-Lagrangian method and Eulerian-Eulerian method,the properties of local collision efficiencyβon insulator surface are investigated.Insulator LXY-120 is used as the test sample,with layered approach,theβat different places(surface,steel cap and insulator edge)are analyzed under different environmental paratmeters(wind speed U and medial volume diameter MVD).It is found that the accuracy of the two methods are similar,but the latter Eulerian-Eulerian method has a better calculation efficiency.The results show thatβdecreases from insulator centerline,the value ofβon insulator edge and steel cap are much greater than that on surface.Meanwhile,theβat insulator edge and steel cap increase with the increasing of U and MVD,there most likely is a saturation ofβwhen U and MVD are high.

关 键 词：绝缘子 水滴 局部碰撞率 环境参数 

分 类 号：TM852[电气工程—高电压与绝缘技术]