摘要
研究110kV强风环境下绝缘子积污特性,有利于减少污闪事故发生,保证我国西北电网及电气设备的安全运行。以XSP-160型瓷三伞绝缘子为研究对象,利用COMSOL软件对本校风洞条件下该绝缘子积污特性进行数值模拟,将模拟结果与其风洞试验结果进行对比表明:两者在数量级及变化规律上一致,验证了该模拟方法的可行性。研究了110kV强风环境下该绝缘子的积污特性,分析了风速、粒径、电压类型对其积污量的影响。结果表明:在直、交流电压作用时,该绝缘子表面整体积污量趋势均随风速的增加而降低;同一风速及相同电压作用时,其表面整体积污量及其增长率均随着粒径的增加而增加;与交流电压作用比较,直流电压作用下,同一(风速、粒径)条件下其表面整体积污量大,且积污直交比随风速增大而逐渐减小;20 μm粒径时,不同风速及电压类型作用下,积污沿伞裙均呈“U”型分布,且交流电压下此分布更为明显。
Researches on the contamination characteristics of insulators under 110kV in strong wind is of benefit to reducing pollution flashover accidents. As a result, it protects the electrical equipment and keeps the power grid operating safely in Northwest China. Testing on a XSP-160 porcelain three-umbrella insulator, this paper applied COMSOL to numerically simulate the contamination characteristics of the insulator. The feasibility of the simulation was proved by the numerical consistency and same regularity as that of the wind tunnel test. Based on the above findings, this paper further studied on the effect of wind speed, particle size and voltage type on the quantity of contamination of the insulator under 110kV in strong. The results show that (1) under DC and AC, the overall contamination on the insulator surface decreases with the increase of wind speed;(2) under the same wind speed and voltage, the overall surface contamination and its growth rate increase with the increase of particle size;(3) under the same wind speed and particle size, there is more overall surface contamination under DC than that under AC;(4) the direct-to-alternating ratio of contamination decreases with the increase of wind speed;(5) when particles are 20μm in diameter, the contamination distribution along the umbrella skirt is in shape of “U” under different wind speed and voltage types, and such distribution is more obvious under AC.
作者
吕玉坤
王召鹏
李金岗
刘云鹏
张亚昭
LU Yukun;WANG Zhaopeng;LI Jingang;LIU Yunpeng;ZHANG Yazhao(School of Energy Power and Mechanical Engineenrg,North China Electric Power University, Baoding 071003,China;Jinneng Clean Energy Co., Ltd., Taiyuan 030002,China)
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2019年第4期77-83,共7页
Journal of North China Electric Power University：Natural Science Edition
关键词
数值模拟
风洞试验
自然积污
风速
粒径
电压类型
numerical simulation
wind tunnel test
natural contamination deposition
wind speed
particle size
voltage type
