聚磁式光学电流互感器饱和特征的记忆效应补偿研究  

Memory Effect Compensation for Saturation of Magnetism Gathering Optical Current Transformer

作　　者：韦兆碧[1,2] 杨银堂[1] 马志瀛[2] 惠培智[2] 

机构地区：[1]西安电子科技大学微电子学院,西安710071 [2]西安交通大学电气工程学院,西安710049

出　　处：《西安交通大学学报》2013年第6期97-102,共6页Journal of Xi'an Jiaotong University

基　　金：高等学校博士学科点专项科研基金资助项目(20050698007)

摘　　要：为补偿聚磁式光学电流互感器(OCT)的磁滞与磁饱和特性对测量线性度和精度的影响,提出具有记忆效应的非线性滤波器补偿模型。该模型将传统FIR滤波器系数用多项式表达的函数代替,使其同时具有非线性拟合和记忆输出能力。利用实测数据训练使非线性滤波器补偿模型输出与磁滞、磁饱和特性输出成反函数关系,将训练好的模型添加到聚磁式OCT中,实现对聚磁铁芯的非线性和记忆效应补偿。实验结果表明,基于非线性记忆效应补偿的聚磁式OCT在铁芯低饱和状态下仍具有较高的测量精度,采样样本的线性测量区间延伸了4.76倍,均方根误差提高约15dB,有效地补偿了聚磁式OCT应用中聚磁铁芯的磁滞和磁饱和效应。To compensate the hysteresis and saturation characteristic of magnetic iron core, a nonlinear module based filter with memory effect is proposed. This module adopts polynomial functions instead of the coefficients of FIR filter to make the output get nonlinear fitting and memory. The existing parameters of magnetism gathering OCT（optical current transformer） measurements are used to train this module, whose output acts as an inverse function of the hysteresis and saturation characteristics. The experiments verify the effectiveness of the polynomial nonlinear compensation method with memory effect, the linear range extends 4.76 times, RMS error increases by about 15 dB, and output of magnetism gathering OCT keeps accurate in under-saturation state of magnetic iron core.

关 键 词：聚磁式OCT 磁饱和 记忆效应 非线性补偿 

分 类 号：TM452[电气工程—电器] TM93