利用间断角原理的数字式变压器保护的研究  

The Study of Digital Transformer Protection Restrained by Dead Angle

作　　者：李文文[1] 崔新艺[2] 陶惠良[2] 

机构地区：[1]西安电力高等专科学校,西安710032 [2]西安交通大学,西安710049

出　　处：《电力自动化设备》1997年第1期25-29,共5页Electric Power Automation Equipment

摘　　要：在利用电磁暂态程序（EMTP）对变压器励磁涌流进行仿真计算的基础上，讨论了数种算法，目的是构造适用于数字式保护的算法，使之较好地重构励磁涌流。并以较小的误差计算出涌流的间断角。提出了用二次多项式重构励磁涌流的新算法，并确定了相应的采样率。This paper describes several algorithms of simulation of transformer inrush by Electromagnetic Transient Program (EMTP). Based on analysis of these algorithms a suitable algorithm is designed for digital protection, which can reconstructs the inrush better and calculate the dead angle with less error. A new algorithm by use of quadratic polynomial is proposed to reconstruct inrush, and the corresponding sampling rate is determined.

关 键 词：变压器 励磁涌流 计算 仿真 

分 类 号：TM410.7[电气工程—电器]