鸟粪形貌特性对220 kV复合绝缘子闪络影响的仿真分析  

Simulation analysis on effect of bird droppings morphological characteristics on flashover of 220 kV composite insulators

作　　者：蒋正阳 赵洪峰[1] JIANG Zhengyang;ZHAO Hongfeng(College of Electrical Engineering,Xinjiang University,Urumqi 830017,China)

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830017

出　　处：《绝缘材料》2024年第7期135-142,共8页Insulating Materials

基　　金：新疆维吾尔自治区自然科学基金资助项目(2022D01C21)。

摘　　要：通过COMSOL有限元仿真软件研究不同形貌特性的鸟粪对绝缘子闪络的影响。通过研究鸟粪的长度和黏度对闪络的影响以及鸟粪下落导致绝缘子闪络的过程,本文得出了不同黏度多段鸟粪构成的组合空气间隙击穿电压的计算方法。结果表明:鸟粪黏度越高,鸟粪的连续性越好,构成的空气间隙击穿电压越低,容易造成复合绝缘子闪络。因此若想提高防鸟罩对高黏度长鸟粪的防护能力,防鸟罩需具有减少鸟粪长度的能力。本研究在防鸟罩表面设计导流槽,将原本一段高黏度且长度较长的鸟粪通过导流槽分割成多段长度较短的鸟粪,通过减少鸟粪长度从而增加空气间隙长度,进而可以提高击穿电压,降低鸟粪闪络概率。COMSOL finite element simulation software was used to study the effect of bird droppings with different morphological characteristics on sulator flashover.By studying the influences of the length and viscosity of bird droppings on the flashover and the process of insulator flashover caused by the bird droppings falling,the calculation method of the combined air gap breakdown voltage composed of multiple sections bird droppings with different viscosities was obtained.The results show that the higher the viscosity of bird droppings,the better the continuity of bird droppings,the lower the breakdown voltage of the air gap,which is easy to cause the composite insulator flashover.Therefore,in order to improve the protection ability of anti-bird shield to high viscosity long bird droppings.the anti-bird shield must have the ability to reduce the length of bird droppings.In this study,a deflector groove was designed on the surface of anti-bird shield,and the high viscosity long bird droppings can be divided into several sections of short bird droppings through the deflector groove.By reducing the length of bird droppings,the air gap length increases,so as to increase the breakdown voltage and decrease the probability of bird droppings flashover.

关 键 词：复合绝缘子 鸟粪 有限元 虚拟介电常数法 黏度 闪络 

分 类 号：TM216[一般工业技术—材料科学与工程]