摘要
提出利用差电流导数的前半波与后半波作对称比较以区别励磁涌流和故障电流。用此方法实现的变压器差动保护,经试验证明动作可靠,抗干扰能力强。
By finding the derivatives of the phase differential currents of the magnetizing in-rush currents and then comparing the first half cycle with the second half. fault or in-rush current can be discriminated. Model device based on this principle shows that its operation is reliable and noise immunity is strong.
出处
《电力系统自动化》
EI
CSCD
北大核心
1996年第4期42-46,共5页
Automation of Electric Power Systems
关键词
变压器
差动保护
波形对称原理
magnetizing in-rush current transformer protection residual magnetism