绝缘子清洗过程中变污层参数的动态闪络模型  

Dynamic Flashover Model Considering Variable Pollution Layer Parameters During Insulator Cleaning

作　　者：彭凯 马鑫 吴继岩 王晓燕 PENG Kai;MA Xin;WU Jiyan;WANG Xiaoyan(State Grid Guyuan Electric Power Company,Guyuan 756000,China)

机构地区：[1]国网固原供电公司,宁夏固原756000

出　　处：《电瓷避雷器》2020年第2期229-235,共7页Insulators and Surge Arresters

摘　　要：提出了一种计算固定水洗高压绝缘子直流闪络电压的动态模型。模型结合了静态闪络和动态电弧模型,考虑了洗涤过程中污染层电阻随时间的变化。本文在不同的等效盐沉积密度(ESDD)值下试验测量该变化并提出了一种计算洗涤过程中污染电阻随时间变化的数学模型。本文在不同的污染水平下,利用所提出的闪络模型计算直流闪络电压,考虑所采用的ESDD值对所提出的闪络模型进行了试验验证。结果表明所提出的模型与试验结果之间有很好的一致性。最后本文改进了绝缘子洗涤系统,减少洗涤中的闪络。This paper presents a dynamic model for calculating dc flashover voltage of fixed washing high voltage insulator.The model combines the static flashover and dynamic arc models and considers the change of the resistance of the pollution layer over time during washing.In this paper,the change was measured experimentally under different equivalent salt deposition density(ESDD)values and a mathematical model was proposed to calculate the change of pollution resistance over time during washing.In this paper,DC flashover voltage is calculated by using the proposed flashover model at different pollution levels.The results show that the proposed model is in good agreement with the test results.Finally,the insulator washing system is improved to reduce flashover in washing.

关 键 词：染污绝缘子 直流闪络电压 动态闪络模型 绝缘子清洗 污层参数变化 

分 类 号：TM216[一般工业技术—材料科学与工程] TM75[电气工程—电工理论与新技术]