电网技术Issue(1)：3843-3849,7.DOI:10.13335/j.1000-3673.pst.2014.01.038
GIS浇注孔传播内部局部放电UHF电磁波的特性
Distribution of Electric Field Strength and Spectral Characteristic of UHF Signal of Partial Discharge Inside GIS at Resin Sprue of Metal Ring
摘要
Abstract
For the majority of gas insulated switchgear (GIS) being operated the built-in ultra-high-frequency (UHF) coupler has still not been installed, and in view of that the basin-type insulator is overlaid by metal ring, the conventional detection method cannot detect the UHF signal of partial discharge inside the GIS, therefore the detection of the UHF signal radiated out from the resin sprue of the metal ring becomes the only method to detect the partial discharge inside the GIS. On the basis of analyzing the impact of the resin sprue on the propagation and attenuation characteristics of UHF electromagnetic wave, the propagation process of UHF signal of the partial discharge inside the GIS is simulated by finite-difference-time-domain (FDTD), and the distribution of electric field strength and its spectral characteristic are emphatically analyzed, and the experimental verification is performed on the platform of GIS and a better consistence is achieved. Research results show that the direction of the principal component of electric field strength of UHF signal at the resin sprue is parallel to the narrow side of the sprue, and the energy mainly concentrates on the frequency range from 0.7 GHz to 2 GHz. This conclusion offers important theoretical foundation and guidance for improving the performance of UHF partial discharge signal detection system.关键词
气体绝缘开关设备/局部放电/特高频/浇注孔Key words
gas insulated switchgear/partial discharge/ultra-high-frequency/resin sprue分类
信息技术与安全科学引用本文复制引用
王亮,郑书生,李成榕,何梦,卢启付,李兴旺..GIS浇注孔传播内部局部放电UHF电磁波的特性[J].电网技术,2014,(1):3843-3849,7.基金项目
国家重点基础研究发展计划(973计划)(2009CB724508)。@@@@The National Basic Research Program of China (973 Program)(2009CB724508) （973计划）
