水轮发电机局部放电在线监测

Online Monitoring of Partial Discharge for Hydraulic Generator

开发的水轮发电机绝缘局部放电在线监测系统,实现了对大型水轮发电机局部放电的监测。放电信号经放大、采样,再由下位机整理并送入计算机,经分析处理后形成放电N-Q-φ三维谱图、Q-t、N-Q、Q-φ谱图以及放电波形图、幅频特性,为电机绝缘状态分析提供了支持。

The feature of partial discharge(PD) is an important aspect of generator insulation. This paper introduced an online monitoring system for hydraulic generator. The PD signal is amplified, filtered, and sampled. After processing by a microcontroller system, the signal is sent to a personal computer in which the data, after the analyzing and processing, can form discharge NQφ diagram, Qt?NQ?Qφ pattern chart, waveform graph and frequency spectrum which provide support to the field analysis of generator insulation.