Distributed Partial Discharge Locating and Detecting Scheme Based on Optical Fiber Rayleigh Backscattering Light Interference

被引:7
|
作者
Zhou, Zhengxian [1 ]
Liu, Hao [1 ]
Zhang, Dawei [2 ]
Han, Yashuai [1 ]
Yang, Xinyan [1 ]
Zheng, Xianfeng [1 ]
Qu, Jun [1 ]
机构
[1] Anhui Normal Univ, Anhui Prov Key Lab Optoelect Mat Sci & Technol, Wuhu 241002, Peoples R China
[2] Univ Shanghai Sci & Technol, Sch Opt Elect & Comp Engn, Shanghai 200093, Peoples R China
基金
中国国家自然科学基金;
关键词
optical fiber sensor; partial discharge; locating; backscattering light interference; PHASE-SENSITIVE OTDR; LOCALIZATION; SENSOR;
D O I
10.3390/s23041828
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Optical fiber sensors are used for partial discharge detection in many applications due their advantage of strong anti-electromagnetic interference capability. Multi-point distributed partial discharge detection and location are important for electrical equipment. In this paper, a distributed partial discharge location and detection scheme based on optical fiber Rayleigh backscattering light interference is experimentally demonstrated. At the same time, the location and extraction algorithm is used to demodulate the partial discharge signal; furthermore, the high-pass filter is used to reduce the system low-frequency noise and environment noise. It is clear that the proposed system can detect a partial discharge signal generated by metal needle sensitivity, and the detectable frequency range is 0-2.5 kHz. We carried out 10 locating tests for two sensing units, the experimental results show that the maximum location error is 1.0 m, and the maximum standard deviation is 0.3795. At same time, the signal-to-noise ratio (SNR) of sensing unit 1 and sensing unit 2 are greatly improved after demodulation, which are 39.7 and 38.8, respectively. This provides a new method for a multipoint-distributed optical fiber sensor used for detecting and locating a long-distance electrical equipment partial discharge signal.
引用
收藏
页数:14
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