摘要
在简要介绍基于采样值差动的变压器保护的基础上 ,重点分析了采样值差动的灵敏度和可靠性问题 ,并提出了自适应的采样值差动保护。动模实验数据表明 ,自适应采样值差动可有效地将变压器制动特性与励磁涌流的鉴别结合起来 ,并具有较高的灵敏度。
According to the different amplitude ratios of the maximum differential current to a low value threshold during faults, the sampling value based transformer protection is studied, with different number of continuous samples to meet the need of the operating criteria. Analysis results based on fault current data obtained from the dynamic tests have shown that this method can greatly raise the sensitivity of transformer protection without mal-function caused by magnetizing inrush current.
出处
《电力系统自动化》
EI
CSCD
北大核心
2001年第10期31-34,共4页
Automation of Electric Power Systems
