基于斯托克斯向量的MOCT故障识别模型的研究  

Fault identification model of MOCT based on Stokes vector

作　　者：刘宇宽[1] 马立新[1,2] 何亮[1] 张建宇[1,2] 

机构地区：[1]上海理工大学光电与计算机工程学院,上海200093 [2]上海市现代光学系统重点实验室,上海200093

出　　处：《计算机应用研究》2017年第5期1358-1361,共4页Application Research of Computers

基　　金：国家自然科学基金资助项目(61205076);上海张江国家自主创新重点资助项目(201310-PI-B2-008)

摘　　要：针对传统电磁电流互感器故障时因磁饱和造成继保误动或拒动现象,提出了一种磁光电流互感器(MOCT)快速识别故障发生及类型的方法。该方法以通过石榴石型MOCT的偏振光的三个斯托克斯分量作为特征量,建立支持向量机识别模型,模型核参数及惩罚参数由粒子群寻优选取。此建模方法仅与斯托克斯分量及故障电流等级有关,与线性双折射及环境变量无关,避免了温度等外界因素对识别的干扰。实验结果表明,识别模型受温度影响小,当训练完成的识别模型工作于不同的温度条件下时,识别误差保持在2%以内。运行中的MOCT可以依靠斯托克斯分量及该模型准确识别故障电流等级,迅速判别出故障类型,精度较其他识别方法更高。Due to the phenomenon that traditional electromagnetic current transformer encountesoperation of the relay protection when it appeared magnetic saturation under fai lure conditions, this paper proposed a methodof the magnetic optical current transformer （ M0CT） for fastly identifying fault. In order to establimodel, the method took three Stokes components of polarized l ight which passed through garnet optical racteristics. It optimized the nuclear and punishment parameters by particle swarm optimization. The model was not associatedwith l inear birefringence or environment variables but was associated with Stokes component and fault current grade, so it avoi-ded the interference of external factors. The result shows that temperature has little effect on the identification model. Although the model works at different temperature conditions, the precision of trained recognition model keep inside of 2%. M0CT hashigher accuracy than other identification methods. It can accurately identify the fault current ponent and the model, and quickly identify the type of fault.

关 键 词：磁光电流互感器 故障识别 粒子群优化 支持向量机 永磁薄膜 偏振性质 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置]