用于电力变压器局部放电检测的光纤传感器的超高信噪比解调方法

Ultra-High SNR Demodulation Method for Optical Fiber Sensors Applied in Power Transformer Partial Discharge Detection.

作者信息

Qiao Jixian, Zhang Weichao, Wang Yanqi, Shao Qibing, Cai Jianlong, Zhao Hong

机构信息

Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China.

Huizhou Electric Power Survey and Design Institute Co., Ltd., Huizhou 516023, China.

出版信息

Sensors (Basel). 2022 Apr 7;22(8):2828. doi: 10.3390/s22082828.

DOI:10.3390/s22082828

PMID:35458813

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9025691/

Abstract

The demodulation method of optical fiber sensors utilized in power transformer partial discharge (PD) detection is insufficient for engineering applications. We design a distributed feedback fiber laser (DFB-FL) PD detection system with an asymmetric 3 × 3 coupler and propose an ultra-high signal-to-noise ratio (SNR) demodulation scheme by eliminating the main factors that affect the traditional method using an asymmetric 3 × 3 coupler. The power transformer PD detection results reveal that the proposed scheme is free from 3 × 3 coupler asymmetry issues, with an average SNR of 38.30 dB, which is much higher than the widely used demodulation method and the piezoelectric transducer sensor. The average SNR of the system is increased by 24.2 dB with the proposed method.

摘要

用于电力变压器局部放电（PD）检测的光纤传感器解调方法在工程应用中存在不足。我们设计了一种带有非对称3×3耦合器的分布式反馈光纤激光器（DFB-FL）局部放电检测系统，并通过消除影响使用非对称3×3耦合器的传统方法的主要因素，提出了一种超高信噪比（SNR）解调方案。电力变压器局部放电检测结果表明，该方案不存在3×3耦合器不对称问题，平均信噪比为38.30 dB，远高于广泛使用的解调方法和压电换能器传感器。采用该方法，系统的平均信噪比提高了24.2 dB。