【摘要】 传统的局部放电检测是测量和分析１ＭＨｚ以下的信号，这些方法测量频带窄、信息量少、易受干扰，不能全面地反映局部放电的本质特征。新近提出的超高频和超宽频带局部放电检测技术，对局部放电检测技术的发展具有重要意义。本文简明扼要地阐述了局部放电信号的物理本质和超宽频带检测原理，运用自行研制的超宽频带局部放电检测系统，研究了典型放电信号和干扰信号的本征特征，为进一步建立超宽频带局部放电检测指纹库、提高绝缘诊断的准确性奠定了基础。更多还原

【Abstract】 Traditional partial discharge detection is to measure and analyze the partial discharge signal under 1MHz which frequency band is narrow, a few of information is obtained, and the measured process is easily interfered. It has been found that the partial discharge characteristic of insulation system can not be completely depicted by the method. The ultra -- high -- frequency and ultra -- wideband partial discharge detecting methods is newly put forward. It is important for development of partial discharge detecting technique. In this paper, the physical character of partial discarge signal and the detecting principle of ultra - wideband are expounded concisely. Using the ultra- wideband partial discharge system designed by us, the characteristics of partial discharge and interfere signals have been developed. It is useful for laying foundations on setting the fingerprint bank of ultra- wideband partial discharge diagnosis and increasing the measuring accuracy in insulation detection.更多还原