摘要
首先分析了有载调压变压器由于变压器抽头的改变而引出的问题,在此基础上提出一种自适应算法,可在线消除由于CT不匹配引起不平衡电流的影响。另外,对于励磁涌流的判别,提出一种基于电压开关量的自适应算法。仿真实例证明该文算法对CT电流校正、励磁涌流鉴别是有效的,在保证动作时间的同时增加了动作的可靠性。
There are two aspects of applications of self-adaptive principle in differential protection of transformer with taps. Firstly, by analyzing problems caused by tap-changing, an adaptive algorithm is proposed. It can eliminate the influence of CT unbalanced current online. Then for excitation inrush current distinguishing, another adaptive algorithm based on voltage increment is put forward. Simulation instance has tested their availabilities of CT currents correction and inrush discrimination. It provides discriminati (1)
出处
《继电器》
CSCD
北大核心
2005年第9期50-53,共4页
Relay
关键词
自适应
差动保护
变压器抽头
励磁涌流
adaptive
differential protection
transformer tap
excitation inrush current
