Differential protection has been the main protection of transformer for a long time. The key and difficult problem is how to prevent the differential protection misoperation caused by inrush current. In recent years, there has been a lot of sympathetic inrush accidents caused by misoperation of transformer differential protection, affecting the safe and stable operation of power system. This paper established the simulation model of inrush current and, analysis of sympathetic inrush mechanism. At the same time, the fundamental reasons of differential protection misoperation caused by the sympathetic inrush were found out. And relevant methods and measures of preventing the sympathetic inrush misoperation in the transformer differential protection are put forward.
Real Time Impact Factor:
1.66667
Author Name: Jingbin Yang, Dalong Fu, Youwen Tian, Yuwei Li
URL: View PDF
Keywords: Transformer; Differential; Prodection; Synpathetic Inrush Current; Measures
ISSN: 2326-5914
EISSN: 2326-5922
EOI/DOI: 10.14355/ijepr.2015.0401.03
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