摘要
针对目前变压器微机保护中广泛使用的二次谐波制动原理的缺陷 ,介绍了一种新的变压器微机保护方案。该方案将比值式电流制动作为变压器的主保护方案 ,利用变压器处于不同状态时差动电流的不同特性再引入不同的辅助判据进行鉴别。
Aimed at the disadvantages of secondary harmonic restraint,a new type of transformer protection based on microprocessor is presented in the paper.The new method is adopted specific value formula restraint,and perfects using different characteristic of differential electrical current of transformers and auxiliary criterion.The result of simulation shows that the new method owns good reliability.
出处
《吉林电力》
2003年第3期21-22,28,共3页
Jilin Electric Power
关键词
电力变压器
微机保护
二次谐波制动原理
电力系统
继电保护
transformer
microprocessor relay protection
inrush current
specific value formula restraint
internal fault
external fault
