The Effect of Inrush Current on Transformer Protection

Author

Wu, Li-Cheng ; Liu, Chih-Wen ; Chien, Shih-En ; Chen, Ching-Shan

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei

fYear

2006

fDate

17-19 Sept. 2006

Firstpage

449

Lastpage

456

Abstract

Transformers are key components for electrical energy transfer in power system. Stability and security of transformer protection are important to system operation; we found that many mal-trip cases of transformer protection are caused by inrush current problems. The phenomenon of transformer inrush current has been discussed in many papers since 1958. Therefore, this paper will only discuss and analyze inrush current problems. Finally, this paper will also present two cases that were analyzed with the use of digital simulation technique to make COMTRADE files, to provide over-current protection and differential protection tests and the analysis of the effect of inrush current on transformer protection.

Keywords

digital simulation; overcurrent protection; power system protection; power transformer protection; power transformer testing; COMTRADE files; differential protection test; digital simulation technique; electrical energy transfer; inrush current effect; overcurrent protection test; power system; transformer protection; Circuit breakers; Circuit faults; Equations; Iron; Power system analysis computing; Power system protection; Power system security; Power system stability; Surge protection; Transformer cores; COMTRADE files; Differential Protection; Inrush Current; Over-current protection;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Symposium, 2006. NAPS 2006. 38th North American

Conference_Location

Carbondale, IL

Print_ISBN

1-4244-0227-1

Electronic_ISBN

1-4244-0228-X

Type

conf

DOI

10.1109/NAPS.2006.359611

Filename

4201354