文档介绍：第 26 卷第 6 期中国电机工程学报 Mar. 2006
2006 年 3 月 Proceedings of the CSEE ©2006 .
文章编号:0258-8013 (2006) 06-0008-06 中图分类号:TM77 文献标识码:A 学科分类号:470×40
基于形态滤波的变压器电流相关保护方案
李肖博,肖仕武,刘万顺, 郑涛
(电力系统保护与动态安全监控教育部重点实验室(华北电力大学),北京市昌平区 102206)
Study on Transformer Correlation Protection Based on Morphological Filtering
LI Xiao-bo, XIAO Shi-wu, LIU Wan-shun, ZHENG Tao
(Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control
(North China Electric Power University), Ministry of Education, Changping District, Beijing 102206, China)
ABSTRACT: In this paper, the morphological filter is utilized 相配合,可构成一种较理想的变压器主保护方案。
as the filtering unit of the transformer protection. The
关键词:电力系统;采样值差动保护;相关度;形态学滤波
characteristics of the fault signal can be preserved and the noise
器;内部故障;外部故障
interferences are suppressed. Based on this, the paper presents a
new transformer protection criterion to distinguish internal 0 引言
faults and external faults by correlation coefficients of sampled
电力系统中大容量变压器的日益增多对变压
current values. After detail analysis on influence on the new ,
criterion of the two formula of correlation, simulation results 器保护的可靠性和快速性提出了更高的要求。围绕
show that one formula of correlation criterion can distinguish 励磁涌流和内、外部故障的快速准确识别问题,近
internal fault from external faults very fast and reliably. Based 年