摘要
干扰的抑制是局部放电在线监测技术的关键问题之一。深入、系统地研究各种干扰源及其传播通道的特性，全面了解局放信号与干扰之间特征的不同，对提高干扰抑制措施的有效性具有重要意义。大功率整流励磁供电电源和火花放电是由励磁侧引入的主要干扰源。在实验的基础上，研究了这两种干扰源及其传播通道的特性，分析了这两种干扰对定子绕组局部放电在线监测的影响。
Noise rejection is the key problem in on line insul ation monitoring of electrical machines through PD detecting. The more overall t he understanding of different characteristic between PD signals and noises, the more efficient the noise rejection measures. The voltage jump of rectifier sourc e during commutation and sparking discharge between the brushes and the rotating components are the main noise from the exciter of synchronous machines. Based o n experiments this paper presents the characteristic of these two kinds of noise source and the transfer functions of their transmission channels from the noise source to the site of PD detection. This will help study the influence of these two noises to on line PD monitoring for stator windings and the methods to dec rease the disturbance in the monitoring system.
出处
《中国电机工程学报》
EI
CSCD
北大核心
1999年第6期37-41,共5页
Proceedings of the CSEE
基金
国家自然科学基金
关键词
发电机
定子绕组
局部放电
在线监测
励磁
干扰
synchronous machine
partial discharge (PD)
noise
noise spreading path
