反射式500kV全光纤电压传感器设计及电场分析  

Design and Electric-Field Analysis of a Reflective 500 kV All-Fiber Voltage Sensor

作　　者：王河林[1] 杨爱军[1] 

机构地区：[1]浙江工业大学理学院,杭州310023

出　　处：《传感技术学报》2013年第3期342-347,共6页Chinese Journal of Sensors and Actuators

基　　金：浙江省自然科学基金项目(LY12F05006);浙江省教育厅基金项目(Y201121906)

摘　　要：设计了一种基于两线偏振模(LP0x1和LP0y1)干涉和石英晶体逆压电效应的反射式500 kV全光纤高电压传感器系统,分析了传感器的测量原理,给出相应的信号解调方法,重点讨论了不同结构的光纤电压传感头的内外电场分布情况,结果表明,光纤电压传感头内部结构的不同会导致内外电场分布差别较大,通过优化系统得到,较长的弧形电极结构能使传感头的内外部电场强度分别降到1.19 kV/mm和2.79 kV/mm,均低于空气和石英晶体的击穿电场强度(3.5 kV/mm和>100 kV/mm),保证了系统的绝缘性和安全性,满足设计要求。A reflective 500 kV all-fiber high-voltage sensor based on the interference of two linearly polarized modes（LPx01 and LPy01）and the inverse piezoelectric effect of quartz crystal is designed.The measuring principle of the novel high voltage transformer is firstly analyzed,and the signal demodulation method is given.The field distribution inside and outside the optical fiber voltage sensor heads with the different structures is discussed in detail.The results show that,the different fiber-optic voltage sensor head structures can cause large differences between the internal and external electric fields of the sensor.Moreover,the longer arc electrode structure can make the internal and external electric field strength of the sensor head reduced to 1.19 kV/mm and 2.79 kV/mm respectively,which are lower than the breakdown field strength of air（3.5 kV/mm）and quartz crystal（100 kV/mm）.Thus the system ＇ s insulation and security is ensured,and the design requirements are meet.

关 键 词：电压传感器 保偏光纤 击穿电场 

分 类 号：TM835.1[电气工程—高电压与绝缘技术] TH741[机械工程—光学工程]