摘要
全光纤电流互感器(FOCT)具有体积小、绝缘简单、无磁饱和等优点,可以更好地兼容现代数字控制和保护系统,是电流互感器的重要发展方向。目前FOCT长期运行可靠性较低,严重制约了其在数字化变电站中的推广应用。为此,文中从电路和光路两方面开展FOCT的故障树模式分析,建立覆盖FOCT整体结构的故障模式分析体系。首先,分析FOCT的结构及工作原理,并根据其回路组成划分故障;其次,提取FOCT在长期运行过程中出现的主要故障模式,对其进行原因分析和排查;然后,从方案设计、元器件筛选和施工工艺方面提出可靠性提升措施;最后,结合实际案例,利用故障树对某例光源故障开展原因分析,并提出其可靠性提升措施,验证文中所提方法的有效性。研究结果可为FOCT故障分析及运行可靠性提升提供理论依据。
The fiber optical current transformer(FOCT)has distinguishing advantages of small size,simple insulation,no magnetic saturation.It can be better compatible with modern digital control and protection systems,which has become an important development direction of current transformer.However,the reliability of FOCT in long-term operation is low at preasent,so its popularization and application in digital substations is seriously restricted.In this paper,the fault tree analysis of FOCT is comprehensively carried out from both the circuit and the optical path,and a fault mode analysis system covering the overall structure of FOCT is established.Firstly,the structure and operating principle of FOCT are analyzed,and the fault is divided according to its circuit composition.Secondly,the main fault modes occurring in the long-term operation of FOCT are extracted,and the listed fault modes are investigated one by one.Then,the reliability improvement measures are proposed from the aspects of scheme design,component selection and construction technology.Finally,the fault tree is used to analyze the cause of a light source fault combining with an actual case,and the reliability improvement measures are proposed to verify the effectiveness of the proposed method.The research can provide a theoretical basis for FOCT fault analysis and operation reliability.
作者
郭贤珊
张民
陈争光
王庆
刘建
庞福滨
GUO Xianshan;ZHANG Min;CHEN Zhengguang;WANG Qing;LIU Jian;PANG Fubin(State Grid Corporation of China,Beijing 100031,China;State Grid Jiangsu Electric Power Co.,Ltd.Research Institute,Nanjing 211103,China)
出处
《电力工程技术》
北大核心
2022年第6期201-210,共10页
Electric Power Engineering Technology
基金
国家电网有限公司科技项目“换流站光学直流电流互感器可靠性提升与故障预警技术研究”(5500-202118121A-0-0-00)。
