基于光功率损耗的外绝缘表面污秽度检测系统影响因素研究
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摘要
为了提高基于光功率损耗的绝缘表面污秽度测量方法的精度,搭建了基于裸光纤的表面污秽度检测系统。基于该系统,对盐溶液浓度、灰悬浊液浓度、光纤形状、光源类型和光纤类型对表面附盐导致的光功率损耗的影响进行了实验研究,并对实验结果进行了较为深入的理论分析。实验结果表明:随着盐溶液浓度的增加,光功率损耗逐渐增大;灰悬浊溶液浓度对光功率损耗影响不大;采用U型光纤时的光功率衰减比直线型光纤更显著;采用宽谱(多纵模)光源时的光功率衰减比窄谱(单纵横)光源更显著;采用多模光纤的光功率衰减比单模更显著。理论分析结果很好地解释了以上实验结果,验证了实验结果的可靠性。进行基于光纤的外绝缘表面污秽度测量时应采用U型状态、半导体光源和多模光纤以提高测量精度。
In order to improve the accuracy of measuring method of insulation surface contamination degree based on optical power loss,a surface contamination degree measurement system based on bare fiber is established. Based on the established system,the influences of salt solution concentration,non-soluble salt solution suspension concentration,fiber shape,light source type and fiber type on the optical power loss caused by the salt deposit are experimentally investigated and the results are analyzed theoretically. The experimental results reveal that the optical power loss increases gradually along with the increase of salt solution concentration; the influence of the non-soluble salt solution suspension concentration on the optical power loss is not obvious; the optical power loss using U-shape optical fiber is more significant than that using linear shape optical fiber; the optical power loss using broadband(multi-longitudinal mode) light source is more significant than that using narrow spectrum light(single longitudinal mode)source; the optical power loss using multi-mode fiber is more significant than that using single mode fiber. The theoretical analysis results explain the experimental results well and verify the reliability of the experimental results. The semiconductor light source,multi-mode fiber and U-type state should be used in the contamination degree measurement based on the bare fiber in order to improve the measuring accuracy.
In order to improve the accuracy of measuring method of insulation surface contamination degree based on optical power loss,a surface contamination degree measurement system based on bare fiber is established. Based on the established system,the influences of salt solution concentration,non-soluble salt solution suspension concentration,fiber shape,light source type and fiber type on the optical power loss caused by the salt deposit are experimentally investigated and the results are analyzed theoretically. The experimental results reveal that the optical power loss increases gradually along with the increase of salt solution concentration; the influence of the non-soluble salt solution suspension concentration on the optical power loss is not obvious; the optical power loss using U-shape optical fiber is more significant than that using linear shape optical fiber; the optical power loss using broadband(multi-longitudinal mode) light source is more significant than that using narrow spectrum light(single longitudinal mode)source; the optical power loss using multi-mode fiber is more significant than that using single mode fiber. The theoretical analysis results explain the experimental results well and verify the reliability of the experimental results. The semiconductor light source,multi-mode fiber and U-type state should be used in the contamination degree measurement based on the bare fiber in order to improve the measuring accuracy.
引文
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[2]关志成,刘瑛岩,周远翔,等.绝缘子及输变电设备外绝缘[M].北京:清华大学出版社,2006:182.
[3]江秀臣,安玲,韩振东.等值盐密现场测量方法的研究[J].中国电机工程学报,2000,20(4):40-43,49.JIANG Xiuchen,AN Ling,HAN Zhendong. Study on the method of ESDD on-site measurement[J]. Proceedings of the CSEE,2000,20(4):40-43,49.
[4]李明,舒乃秋,彭旭东,等.基于声发射技术的绝缘子污秽放电监测[J].电力自动化设备,2004,24(6):98-100.LI Ming,SHU Naiqiu,PENG Xudong,et al. Insulator contaminant flashover monitoring based on acoustic emission technique[J]. Electric Power Automation Equipment,2004,24(6):98-100.
[5]杨振东,舒乃秋,王文志,等.绝缘子污秽放电声发射监测方法研究[J].电力自动化设备,2005,25(7):35-37.YANG Zhendong,SHU Naiqiu,WANG Wenzhi,et al. Acoustic emission detection method monitoring insulator pollution flashover[J]. Electric Power Automation Equipment,2005,25(7):35-37.
[6]KUMAGAI S,YOSHIMURA N. Leakage current characterization for estimating the conditions of ceramic and polymeric insulating surfaces[J]. IEEE Transactions on Dielectrics and Electrical Insulation,2004,11(4):681-690.
[7]刘勇.基于泄漏电流递归分析的绝缘子状态检测研究[D].天津:天津大学,2009.LIU Yong. Recurrent plot analysis of leakage current for evaluating and monitoring outdoor insulator performance[D]. Tianjin:Tianjin University,2009.
[8]MAHMOUD F,AZZAM R M A. Optical monitor for contamination on HV insulator surfaces[J]. IEEE Transactions on Dielectrics and Electrical Insulation,1997,4(1):33-38.
[9]张锐,吴光亚,刘亚新,等.光技术在线监测绝缘子盐密和灰密的实现及应用[J].高电压技术,2010,36(6):1513-1519.ZHANG Rui,WU Guangya,LIU Yaxin,et al. Realization and application on monitoring insulator ESDD and NSDD by optical technology[J]. High Voltage Engineering,2010,36(6):1513-1519.
[10]CAI W,DENG H,ZHOU G,et al. Online measurement of equivalent salt deposit density by using optical technology[J]. IEEE Transactions on Dielectrics and Electrical Insulation,2013,20(2):409-413.
[11]高维钊,张庆超,郑明忠,等.绝缘子表面盐密分布式测量系统的设计[J].电网技术,2015,39(10):2929-2934.GAO Weizhao,ZHANG Qingchao,ZHENG Mingzhong,et al. Design of distributed measurement system for salt density on insulator surface[J]. Power System Technology,2015,39(10):2929-2934.
[12]王辉,王平,于虹,等.光纤通信[M]. 2版.北京:电子工业出版社,2009:69.
[13]PALAIS J C.光纤通信[M].王江平,刘杰,闻传花,等,译. 5版.北京:电子工业出版社,2006:16-17,32,76.
[14]未松安晴,甲贺健一.光纤通信[M].金轸裕,译.北京:科学出版社,2004:48-49.
[15]AGRAWAL G P.光纤通信系统[M].贾东方,忻向军,译. 4版.北京:电子工业出版社,2016:60-70.
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