中文摘要：

为了满足电力工业对高压电压互感器的需求,采用了基于模间干涉原理和石英晶体的逆压电效应的方法,介绍了一种新型的光学高压电压互感器的基本结构和工作原理。该互感器是在圆柱形石英晶体上施加交流电压使其产生压电形变,使缠绕在圆柱表面的椭圆芯双模光纤中的两个传导模LP01模和LP11模的相位差发生变化,最后得到被测电压。通过实验对该互感器的设计进行了可行性研究,表明该互感器具有较好的精度和线性度,为光学电压互感器的研究提供了理论基础。该互感器信号的感应和传输都在光纤中进行,因而不需要耦合器、起偏器、电光晶体等光学元件,加工工艺简化,该系统是具有结构简单、准确度高、安全可靠、造价低等优点的互感器系统。

英文摘要：

In order to satisfy the demands of high voltage transducer in modern power industry,a transducer was designed on the basis of converse piezoelectric effect of quartz crystal and interference between modes in polarization maintenance fiber,the structure and principle of a new type of optical high voltage transducer ware presented.The piezoelectric deformation of the cylinder-shaped transducer crystal induced by an applied ac voltage was sensed by an elliptical-core dual-mode fiber wound onto the circumferential surface. White-light interferometry and active homodyne phase tracking would detect the resulting modulation of the differential phase between LP01 mode and LP11 mode in fiber. According to the relation between group modal refractive index difference and normalized frequency,the optical fiber＇s parameter was researched,and the feasibility of the designed voltage transducer was verified by experiments. The results show that the voltage transducer based on the principle mentioned above possesses better accuracy and linearity,which can provide a theoretical basis for optical high voltage transducer. The sensing and transmission of signals are all completed by fiber. Therefore,no optical elements,such as couplers,electro-optical crystal,and polarizer are used,the transducer is a system of simple,nicety,safety credibility,price low and no pollution.