摘要
为了探究在不同部位改装大伞裙对复合绝缘子积污特性的影响,以FXBW4-110/100型复合绝缘子为基础原模型,构建3种大伞裙结构模型。采用COMSOL Multiphysic对4种绝缘子模型进行积污特性数值模拟,对比分析其附近流场和电场分布差异,探究其在不同风速、粒径、和电压类型下绝缘子表面的积污规律。结果表明:在适当部位改装大伞裙可以改变复合绝缘子近壁区域的流场分布;当所改装的大伞裙尺寸相对较小且片数较少时,复合绝缘子附近的直流电场强度分布几乎不发生变化;同一污秽颗粒粒径下,随风速的增大,积污量呈上升趋势;直流电压作用下,复合绝缘子始末端改装大伞裙即模型I,在低风速时积污量为原模型的75%~95%,且随着风速的增大,积污量差距先增大后减小;交流电压作用下,模型I的积污量以原模型积污量为基值上下浮动,而模型II和模型III在1~3 m/s时的积污量约为原模型的50%~90%。
In order to explore the influence of changing large sheds in different parts on the pollution accumulation characteristics of composite insulators,three kinds of large shed structural models are constructed based on the original model of FXBW4-110/100 composite insulators.COMSOL Multiphysic is used to numerically simulate the fouling characteristics of four insulator models,and the differences in the distribution of flow field and electric field near them are compared and analyzed to explore the fouling laws under different wind speeds,particle sizes and voltage types.The results show that the flow field distribution near the composite insulator can be changed by installing a large umbrella skirt at an appropriate position.When the size of the large shed is relatively small and the number of pieces is small,the DC field strength distribution near the composite insulator is almost unchanged.Under the same particle size,the amount of fouling increases with the increase of wind speed;under the action of DC voltage,the large umbrella skirt is installed at the beginning and end of the composite insulator,which is the first model.At low wind speed,the pollution amount is 75%~95%of the original model,and with the increase of wind speed,the difference of pollution amount increases first and then decreases.Under the action of AC voltage,the amount of pollution in model one fluctuates up and down based on the original model;while the amount of pollution in model two and model three at 1~3 m/s is about 50%~90%of the original model.
作者
吕玉坤
魏壮
王晶
LYU Yukun;WEI Zhuang;WANG Jing(School of Energy Power and Mechanical Engineering,North China Electric Power University,Baoding 071003,Hebei Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2023年第10期4046-4054,共9页
Proceedings of the CSEE
关键词
大伞裙结构
复合绝缘子
数值模拟
积污特性
super large umbrella skirt structure
composite insulator
numerical simulation
pollution characteristics
