摘要
电力系统复合绝缘子闪络故障往往与有风天气状态有关,除因风引起的风偏闪络外,本文统计发现低风速状态下仍存在一定数量的复合绝缘子闪络故障,而目前有关不同风速及风向对复合绝缘子闪络特性的研究数据尚十分缺乏。为了研究风速和风向对复合绝缘子闪络电压的影响,在风洞试验室搭建了工频闪络特性试验平台,来模拟自然界中不同风速和风向,通过复合绝缘子人工闪络试验,获得了不同风速及风向条件下复合绝缘子的闪络电压。结果表明,不同的风向角下复合绝缘子闪络电压会随风速的增加而升高,绝缘子闪络电压受风向角影响明显,风向角越接近90°,闪络电压越高,紫外摄像表明空气流对复合绝缘子闪络的形成和发展起到抑制作用。研究结果有助于指导对复合绝缘子闪络故障的现场分析。
Composite insulator flashover in power system is often related to windy weather.Besides flashover caused by windage yaw,we found that a certain number of composite insulator flashover faults still exist under the condition of low wind speed.For the lack of references that focus on the influence of air flow on composite insulators flashover voltage at home and abroad,and to study the influences of wind speed and direction on composite flashover voltage,we set up flashover platform in the wind tunnel laboratory to simulate different wind speed and direction in nature,and we obtained a relationship of wind speed,wind direction and the composite insulator flashover voltage through a large number of artificial flashover tests.The test results confirm that flashover voltage of composite insulators increases with wind speed.Flashover voltage is influenced by wind angle,and the closer of wind angle to 90°,the higher flashover voltage is.Air flow inhibits the formation and development of insulator flashover.The obtained ultraviolet results can be used to analyze composite insulator flashover accidents.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2012年第1期75-81,共7页
High Voltage Engineering
基金
国家重点基础研究发展计划(973计划)(2009CB724508)~~
关键词
复合绝缘子
闪络电压
风速
风向
电弧
气流
composite insulators
flashover voltage
wind speed
wind direction
arc
airflow
