电网技术2018，Vol.42Issue(5)：1646-1652,7.DOI:10.13335/j.1000-3673.pst.2017.2636
交流110 kV复合绝缘子高压端内部气隙尺寸对电场分布的影响
Study on Influence of Air Gap Size in High-Voltage Terminal on Electric Field Distribution of AC 110kV Composite Insulator
摘要
Abstract
Internal air gap in sheath of composite insulator high-voltage terminal can lead to electric field distortion, causing internal partial discharge. Long-term partial discharge may cause the sheath to break down and degrade mechanical properties of mandrel, thus causing rupture of the mandrel. Since air gap size is the main reason affecting internal electric field distortion, a 3D air gap model of AC 110kV composite insulator is established with COMSOL, and influence of span, thickness, length on electric field distribution is analyzed. Compared with intact condition, maximum air gap field strength in the sheath increases about 1.5～4 times and the internal air gap suffers much higher field strength. The air gap field increases with increase of the span and thickness, and weakens with increase of length. The influence of span and length will decrease gradually and tend to be stable, but the influence of thickness is still obvious later. The influence of span, thickness, and length on the air gap field has an interactive effect, which can be equivalent into a ternary cubic polynomial regression model by numerical analysis.关键词
复合绝缘子/有限元分析/电场分布/气隙尺寸Key words
composite insulator/finite element analysis/electric field distribution/air gap size分类
信息技术与安全科学引用本文复制引用
胡建林,李洋洋,杨威,吴彬,钟睿,蒋兴良,赵禹来..交流110 kV复合绝缘子高压端内部气隙尺寸对电场分布的影响[J].电网技术,2018,42(5):1646-1652,7.基金项目
国家自然科学基金项目(51321063，51607019）；国家电网公司科技项目(52170216000D)；高等学校学科创新引智计划项目(B08036)。Project Supported by National Natural Science Foundation of China (51321063, 51607019) （51321063，51607019）；国家电网公司科技项目(52170216000D）
Science-Technology Program of State Grid Corporation of China (52170216000D) （52170216000D）
The Programme of Introducing Talents of Discipline to Universities (B08036). （B08036）
