电瓷避雷器Issue(6)：234-242,9.DOI:10.16188/j.isa.1003-8337.2023.06.028
基于振荡水滴法和放电特性的复合绝缘子老化研究
Aging of Composite Insulators Based on Oscillating Water Droplet and Discharge Characteristics
陈晓芸 1李任展 2冯帆3
作者信息
- 1. 郑州电力高等专科学校,郑州 450000
- 2. 恒大电气有限公司,浙江 温州 611133
- 3. 国网河南省电力公司新密市供电公司,郑州 450000
- 折叠
摘要
Abstract
Long-term reliability is one of the most important performance indicators for high-voltage in-sulators in power transmission and distribution networks.Typically,the aging performance of composite insulators is evaluated by studying the hydrophobicity,surface roughness,scanning electron microscope images,and related discharge characteristics of insulation materials.A novel aging evaluation method for composite insulators based on the oscillating water droplet(OWD)technique is proposed.Firstly,OWD tests were conducted on insulation samples at different aging stages,and the entire process of water drop-let contact with the composite material surface was recorded and analyzed using a high-speed camera.Secondly,the relationship between the oscillating water droplet and the contact angle was investigated using an optical contact angle meter to study the hydrophobicity of the insulator.The loss of hydrophobicity was determined by conducting surface roughness tests using an optical profilometer.The experimental results demonstrated that with increased aging and surface roughness,the hydrophobicity of the insulation material decreased,leading to a significant decline in insulation performance.The breakdown test results indicated that the surface flashover voltage of the insulation material decreased with increasing aging time,resulting in deteriorated insulation reliability.In conclusion,the OWD method proposed in this paper can serve as a supplementary approach to assess the hydrophobicity of composite insulators and evaluate their long-term performance and stability.关键词
复合绝缘子/憎水性/表面粗糙度/介质击穿试验/OWDKey words
composite insulator/hydrophobicity/surface roughness/breakdown test/OWD引用本文复制引用
陈晓芸,李任展,冯帆..基于振荡水滴法和放电特性的复合绝缘子老化研究[J].电瓷避雷器,2023,(6):234-242,9.
