Title :
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
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;
Conference_Titel :
Transmission and Distribution Conference and Exposition, 2003 IEEE PES
Print_ISBN :
0-7803-8110-6
DOI :
10.1109/TDC.2003.1335245