Modeling Of Pockels Effect Electro-optic Sensor Mechanism And Experimental Study

With the increasing demand of electric power,China’s power grid towards intelligent,digital,large capacity,high voltage in the direction of development,in this context,and the drawbacks of traditional electromagnetic voltage transformer is more prominent,more and more difficult to meet the requirements of the development of modern electric power industry.These advantages have won people’s attention,many researchers in optical voltage transformer put a lot of money and time,but the current optical voltage transformer still have some problems to be solved.The results show that the measurement results at run time will produce temperature drift with the change of temperature.So it is necessary to study the sensing mechanism of the optical voltage transformer.This paper studies the optical voltage transformer based on Pockels effect,according to the mathematical model of electro-optic crystal transformer in the distribution parameter model,and obtained the optical voltage transformer system block diagram based on the mathematical model of each part of the transformer.Based on the mathematical model of electro-optic crystal,the model of electrooptic crystal is modeled by the finite element analysis software COMSOL.The macroscopic and microscopic models are obtained,and the electric field distribution of the crystal is obtained;In the micro model for the modeling and Simulation of Pockels effect,the crystal element distribution of the electric field,the voltage polarization in the crystal and the pressure generated Pockels electro-optic effect time polarized wave in the crystal distribution,and the polarization state evolution is analyzed,and the effectiveness of distribution the parameters are verified.The optical voltage transformer as an example,in the COMSOL of optical voltage transformer of the temperature field,thermal stress and thermal stress of multi physics modeling and simulation application,the distributed parameter model of the thermal stress analysis of optical voltage transformer,has been in the case of a single source,effect of temperature on the optical voltage transformer.