Title :
Improved operation of differential protection of power transformers for internal faults based on negative sequence power
Author :
Tian, Kaihua ; Liu, Pei
Author_Institution :
Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
There is a possible of nonoperation for internal faults of second harmonic restraint differential protection of transformers of power systems. Based on Fourier analysis, a new scheme of second harmonic restraint canceled by change of the negative sequence power is proposed in this paper. It can improve the protection functions
Keywords :
Fourier analysis; harmonics; power transformer protection; Fourier analysis; differential protection; internal faults; negative sequence power; power transformers; protection functions improvement; second harmonic restraint; Harmonic analysis; Phase transformers; Power system analysis computing; Power system faults; Power system harmonics; Power system modeling; Power system protection; Power transformers; Surge protection; Voltage;
Conference_Titel :
Energy Management and Power Delivery, 1998. Proceedings of EMPD '98. 1998 International Conference on
Print_ISBN :
0-7803-4495-2
DOI :
10.1109/EMPD.1998.702605
