变压器励磁涌流灰色识别研究  

Identification of Transformer Inrush Current Based on Grey Theory

作　　者：吴志军 范翔 吴昊文 李宁 王明东[3] WU Zhijun;FAN Xiang;WU Haowen;LI Ning;WANG Mingdong(Henan Province Engineering Consulting Center,Zhengzhou 450000,China;Henan Province Institute of Industrial Planning and Design,Zhengzhou 450000,China;School of Electrical Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]河南省工程咨询中心,郑州450000 [2]河南省工业规划设计院,郑州450000 [3]郑州大学电气工程学院,郑州450001

出　　处：《河南科学》2019年第5期835-839,共5页Henan Science

基　　金：河南省科技攻关项目(172102210012)

摘　　要：由于变压器励磁涌流的影响,使得变压器差动保护较难正确动作.为了保证差动保护能够正确动作,必须对变压器内部故障电流和励磁涌流进行正确识别.基于变压器励磁涌流所具有的特征,将灰色系统方法应用于励磁涌流的识别.首先将多个励磁涌流判据(指标)进行综合,通过分析构建各指标的白化权函数,然后应用灰色聚类方法得到识别结果.与实际测量结果的比较验证了该综合判据的正确性和灰色聚类方法的有效性。Due to the influence of transformer magnetizing inrush current,the differential protections are difficult to operate correctly. In order to ensure that the differential protection can operate correctly,the internal fault current and inrush current of the transformer must be correctly identified. Based on the characteristics of magnetizing inrush current,the grey system method is applied to the identification of inrush current in this research. Multiple inrush current criteria(indicators)are synthesized at first,and the whitening weight function of each indicator is constructed. Then,a gray clustering method is used to obtain the recognition result. The comparison with the actual measurement results verifies the correctness of the comprehensive criteria and the effectiveness of the gray clustering method.

关 键 词：励磁涌流 变压器内部故障电流 白化权函数 灰色聚类 

分 类 号：TM41[电气工程—电器]