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Issue:
Research of a New Criterion of Main Protection of Transformer
Author(s):
HE Ren-wang
,
XIE Wei
,
SONG Hai-yan
,
WU Xun
Pages:
52
-
55
Year:
2012
Issue:
2
Journal:
Industry and Mine Automation
Abstract:
针对传统的变压器主保护无法正确识别变压器励磁涌流与内部故障电流的问题,提出了一种基于差动电流间断角的变压器主保护新判据.该判据采用sym4小波变换对变压器励磁涌流及内部故障电流信号进行处理,得出两者在d1尺度下间断角的明显差异特征,从而可正确区分变压器励磁涌流与内部故障电流.仿真结果验证了该判据的有效性.
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