绝缘子沿面局部放电的光电探测效率分析研究  

Study on Photoelectric Detection Efficiency of Insulator Creeping Partial Discharge

作　　者：朱旭亮 何金 张黎明[3] 邢向上 陈荣[1] ZHU Xuliang;HE Jin;ZHANG Liming;XING Xiangshang;CHEN Rong(State Grid Tianjin Electric Power Company Electric Power Research Institute,Tianjin 300384,China;Tianjin Key Laboratory of Internet of Things in Electricity,Tianjin 300384,China;State Grid Tianjin Electric Power Company,Tianjin 300232,China)

机构地区：[1]国网天津市电力公司电力科学研究院,天津300384 [2]天津市电力物联网企业重点实验室,天津300384 [3]国网天津市电力公司,天津300232

出　　处：《绝缘材料》2022年第7期104-111,共8页Insulating Materials

基　　金：国网天津市电力公司科技项目(kj20-1-17)。

摘　　要：为了实现荧光光纤局部放电检测系统的开发,针对绝缘子沿面放电光辐射特性,对荧光光纤光电测量系统关键性能和匹配效率进行了对比分析。通过试验获得了绝缘子沿面放电光谱主要成分、特征谱线和随放电强度变化的光谱统计范围,并结合绝缘子沿面放电发射光谱、荧光光纤激发光谱、光纤的捕获效率,对比分析了两种荧光光纤对局部放电的荧光激发效率,得到了两种典型聚苯乙烯(PS)荧光光纤的激发强度和激发效率。结果表明:激发光谱为299~477 nm的光纤要优于294~410 nm的光纤;R3896型光电倍增器(PMT)与荧光光纤系统结合匹配效率更优,PMT在最优驱动偏压下信噪比(SNR)达到峰值12.45 dB;在最优驱动偏压下自然散热系统的自温漂效应大致为7%,冷却恢复时间大致为40 min。To realize the development of fluorescent optical fiber partial discharge detection system,according to the light radiation characteristics of insulator creeping discharge,the key performance and matching efficiency of the fluorescence photoelectric measurement system were compared and analyzed.The main components,characteristic spectral lines,and spectral statistical changing with discharge intensity of the insulator creeping discharge spectrum were obtained through experiments.Combined with the emission spectrum of insulator creeping discharge,excitation spectrum of fluorescent fiber,and capture efficiency of the fiber,the fluorescence excitation efficiency of two fluorescent fibers for partial discharge was compared and analyzed,and the excitation intensity and excitation efficiency of two typical PS fluorescent fibers were obtained.The results show that the fiber with 299−477 nm of excitation spectrum is better than the fiber with 294−410 nm of excitation spectrum.The R3896 PMT and fluorescent fiber system has better matching efficiency,and the SNR of PMT reaches a peak value of 12.45 dB under the optimal driving bias.Under the optimal bias voltage,the self-temperature drift effect of natural cooling system is approximately 7%,and the cooling recovery time is approximately 40 min.

关 键 词：绝缘子沿面放电 局部放电 荧光光纤 光测法 发射光谱 

分 类 号：TM216[一般工业技术—材料科学与工程]