用荧光光纤技术检测局部放电信号传感器的研究  

Study of fluorescent fiber sensors for partial discharge detection

作　　者：魏念荣[1] 张旭东[2] 曹海翔[1] 何立汉[1] 姜建国[1] 赵文华[2] 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084 [2]清华大学工程力学系,北京100084

出　　处：《清华大学学报（自然科学版）》2002年第3期329-332,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目 (5 963 72 0 0 )

摘　　要：为探索利用放电光效应对局部放电进行检测的新方法 ,在分析荧光光纤和局部放电的光谱特性的基础上 ,提出了用来检测放电的三种荧光光纤传感器的结构。对 3种传感器特性进行了试验研究比较 ,并将其中一种传感器用于高压电机的局部放电检测。结果表明该传感器和其它检测手段相配合可以有效地提高电机定子绝缘状态监测与保护的可靠性。采用相关分析可以提高传感器的灵敏度。To explore a new method of monitoring partial discharge signals using the optical effects, a photoelectric cell and three configurations of sensors made of fluorescent fibers were designed based on an analysis of the characteristics of the fibers and the partial discharge spectrum. One sensor was installed in a high voltage motor. The experimental results showed that the output changed from random pulses to 50 Hz periodic pulses and finally to 100 Hz periodic pluses as the voltage increased, and that the pulse amplitudes was higher with higher voltages. Therefore, the frequency and amplitude of the output signals effectively reflect the intensity of the partial discharges in the motor. The sensor will improve the reliability of monitoring systems by working together with other detecting methods. Correlation analysis can be used to improve the monitoring system sensitivity.

关 键 词：荧光光纤技术 局部放电 信号 传感器 高压电器 绝缘检测 

分 类 号：TM855[电气工程—高电压与绝缘技术] TP212[自动化与计算机技术—检测技术与自动化装置]