A novel transformer protection method based on the ratio of voltage and fluxional differential current

Author

Yan, Xu ; Zengping, Wang ; Qing, Liu ; Guocai, Shang

Author_Institution

Dept. of Electr. Eng., North China Electr. Power Univ., Baoding, China

Volume

1

fYear

2003

fDate

7-12 Sept. 2003

Firstpage

342

Abstract

In this paper, the mal-operation in transformer differential protection caused by magnetizing inrush, the limitations of magnetic flux characteristic principle is first discussed. Then this paper puts forward a new method to distinguish magnetizing inrush based on the ratio of voltage and fluxional differential current. The principle is simple and its implementation is easy. None of the anticipated internal parameters is needed. The advantages of the method are convenient data acquisition, fewer computations and quick operation. The results of simulation testing confirmed that the method is able to clear the internal fault reliably and quickly. Therefore, this method has great practical value.

Keywords

fault currents; magnetic flux; power system faults; power system protection; power transformer protection; data acquisition; differential protection; fluxional differential current; internal fault; magnetic flux characteristic principle; transformer protection method; voltage ratio; Couplings; Data acquisition; Magnetic flux; Magnetic materials; Power system harmonics; Power system protection; Power transformers; Protective relaying; Surge protection; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Transmission and Distribution Conference and Exposition, 2003 IEEE PES

Print_ISBN

0-7803-8110-6

Type

conf

DOI

10.1109/TDC.2003.1335245

Filename

1335245