摘要
针对当前发生突变型故障时无法准确区分电力网络故障和电流传感单元故障的问题,提出采用双调制式光路结构,并利用温度信号缓变特性实现全光纤电流传感器故障诊断的方法。在分析双调制式全光纤电流传感器工作机理的基础上,应用正弦波作为调制信号,采用能量系数及调制深度表征故障特征,并进行仿真分析;最后通过搭建实验系统进行实验,实验结果表明,采用本文方案能够准确区分电力网络故障与传感单元故障。
In the case of abrupt faults,it is impossible to accurately distinguish power network faults from electric cur⁃rent sensing unit faults.Aimed at this problem,a fault diagnosis technology for an all-fiber dual-modulation optic cur⁃rent sensor based on temperature characteristics is proposed.First,the working mechanism of the all-fiber dual-modula⁃tion optic current sensor is analyzed.Then,the sinusoidal wave is used as a modulation signal,and the energy coeffi⁃cient and modulation depth are applied to characterize the system faults,which are further simulated and analyzed.Fi⁃nally,an experimental system was built,and experimental results indicate that the proposed scheme can accurately dis⁃tinguish the power network fault from the sensor unit fault.
作者
吴健华
张晓锋
陈亮
WU Jianhua;ZHANG Xiaofeng;CHEN Liang(College of Electrical Engineering,Naval University of Engineering,Wuhan 430033,China;Unit No.92853,Huludao 125106,China)
出处
《电力系统及其自动化学报》
CSCD
北大核心
2023年第7期144-150,共7页
Proceedings of the CSU-EPSA
关键词
故障诊断
双调制式全光纤电流传感器
能量系数
调制深度
fault diagnosis
all-fiber dual-modulation optic current sensor
energy coefficient
modulation depth
