摘要
涂覆RTV涂层后盘形绝缘子陡波试验性能的下降说明了对于陡波试验研究的迫切性。为了深入探索陡波放电的发展过程和放电速度,搭建了基于ICCD超高速照相机的陡波放电观测平台,提供了对高电压陡波放电过程进行拍摄的手段。设计并实现了观测回路与放电回路的同步方案,实现了放电过程的捕捉。通过对观测平台的放电回路和拍摄回路精细的时序分析,在完成对陡波放电过程进行高速拍摄的同时,实现了每帧陡波放电照片与陡波电压不同时段波形的准确对应。在此平台得到的放电观测结果基础上,描述了陡波的放电过程,计算得到不同极性陡波下不同介质表面的陡波放电速度大约在10^(–2)～10^(–1) cm/ns数量级,得到了涂覆RTV涂层后放电速度下降的结论,验证了观测平台进行陡波研究的能力。
The performance decrease of disc insulator with RTV coating under steep-front impulse shows that it is urgent to study the steep-front discharge process.In order to explore the development process and the discharge speed of steep-front impulse,we constructed a discharge observation platform based on ICCD ultra fast photography,providing the means to catch the steep-front impulse discharge process.The synchronous scheme of discharge capturing and steep-front impulse voltage measurement was designed and realized.The timing analyses of discharge circuit and optical shooting circuit were carried out on the observation platform,and the moments of discharge were successfully corresponded to the steep-front impulse voltage waveform.Based on the results of the discharge observations obtained on this platform,the discharge process and the microscopic discharge mechanism of the steep-front impulse were described qualitatively.In order to prove that the platform can play an important role in researching the steep-front impulse,the steep-front impulse discharge velocity over different dielectric surfaces under different polarities were calculated based on the measurement.The steep-front impulse discharge velocity has the order of magnitude of 10-2~10-1 cm/ns,and can be slowed down by RTV coating.
作者
姚一鸣
梁曦东
邓桃
姜廷域
YAO Yiming;LIANG Xidong;DENG Tao;JIANG Tingyu(State Key Laboratory of Control and Simulation of Power System and Generation Equipments,Department of Electrical Engineering,Tsinghua University,Beijing 100084,China;Electric Power Research Institute of State Grid Jibei Electric Power Company,Beijing 100045,China;China Electric Power Research Institute,Beijing 100192,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2019年第5期1666-1673,共8页
High Voltage Engineering
基金
国家自然科学基金(51577099)~~
关键词
陡波试验
盘形绝缘子
超高速照相
放电同步观测
放电通道
steep-front impulse voltage test
cap-and-pin insulator
ultra-high speed photography
synchronous observation on discharge
discharge channel
