区分变压器励磁涌流和内部短路的积分型波形对称原理  

A NOVEL SCHEME TO DISCRIMINATE INRUSH CURRENT AND FAULT CURRENT BASED ON INTEGRATING THE WAVEFORM

作　　者：焦邵华[1] 刘万顺[1] 

机构地区：[1]华北电力大学电力系,北京100085

出　　处：《中国电机工程学报》1999年第8期35-38,共4页Proceedings of the CSEE

基　　金：国家自然科学基金!59577010

摘　　要：提出一种基于积分算法的波形对称原理，以区分电力变压器的励磁涌流和内部短路。该方法利用积分处理以提取变压器内部故障的短路电流的波形对称特征。在此基础上，给出了应用模糊集理论区分变压器的励磁涌流和内部短路的模糊数学模型和判据。EMTP仿真表明，该原理简单可靠，效果良好，具有实用价值。A novel Scheme of the discrimination between inrush and fault current is presented in the paper. It's obvious that there is great difference between the inrush and the fault current waveform. How to aharact characteristics of the difference is the key to this problem. Based on fuzzy sets, an integrated algorithm describing the smpetry of former half circle and latter half circle of current waveform is developed. All the principles are verified by the EMTP and the simulation Lab of North China Electric Power University.

关 键 词：电力变压器 励磁涌流 短路 波形对称 电力系统 

分 类 号：TM410.7[电气工程—电器] TM743