摘要
根据现场的要求,本文研制出一种非接触式空气电容传感器,它具有频带宽、绝缘
性能好、灵敏度高的特点,可以在高压端测量高频放电脉冲,可以代替各种接触式传感
器在发电机高压母线端进行在线局部放电监测。这种传感器不与发电机母线直接接触,
容易安装,安全性好,易于被用户 所接受。
通过大量的试验研究,开发出了由这种传感器组成的方向传感器系统,给出了在
100 M S/s 采样率下方向传感器判别放电脉冲的判据,并开发出判别软件。此方向传感
器系统可以有效地识别外部干扰脉冲和局部放电脉冲 。 研制出一种 基于这种传感器的发
电机定子局部放电监测系统。此系统可在实验室正确运行,可以对放电进行监测、从干
扰中提取局部放电脉冲、统计分析放电类型并绘制出统计谱图。
Based on the requirement of electrica l power plants, we designed a new
type of sensors for stator winding Partial Discharge measurement online. The
sensors are of good insulation, high sensitivity, easy installation on site, and
good safety, suitable for on - site application.
We developed a se t of directional sensors with the analyzing software for
eliminating pulse interference from the transformer side based on our developed
non - contact type PD sensors. We also developed a PD on - line detecting system
for stator windings of generators, which c onsists of a set of non - contact type
directional sensors, digital system, and software. The detecting system can
monitor PD online, reject noises, analyze PD faults, and show the finger prints
of the detected PD.
引文
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华北电力大学(北京)硕士学位论文
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