基于薄膜电阻的新型光纤电流传感器的研究

Research of New Fiber-optic Current Sensor Based on Thin-film Resistor

为了满足电力需求,在高压直流输电技术的基础上,提出了基于薄膜电阻的新型无源光纤电流传感器的设计方案。在实验室条件下,为金属薄膜电阻选取合适的性能参数,利用有限元热分析ANSYS软件对传感器部分进行建模分析,搭建实验平台,根据荧光余辉特性得知,荧光寿命τ与温度存在对应关系,采集测量数据,通过前期算法比较,在低压端选择prony算法处理测量数据。结果表明:该方案稳定性高、误差小,理论分析与实验监测结果比较吻合,可完成高压大电流的测量。

In order to meet the growing demand of the power source,the new type of passive fiber-optical current sensor was put forward on the basis of the high-voltage direct current transmission technology. Under laboratory conditions,suitable parameters for the performance of the metal film resistor were chosen and the thermal analysis software ANSYS for modeling analysis was used.On basis of the principles of fluorescence afterglow life,there is a corresponding relationship between temperature and fluorescence afterglow life τ. The experimental platform was built and data was selected. By comparing the algorithm in early times,the prony algorithm method was chosen to deal with the measurement data. The result shows that the scheme has high-stability and low-error,the monitoring results are consistent with the theoretical analysis. The present study can realize the measurment of high voltage and high current.