Title :
A Novel Criterion for Neutral Current Differential Protection
Author :
Zhang, Min ; Wang, HaiGang ; Dong, Xinzhou ; Bo, Z.Q. ; Caunce, B.R.J. ; Klimek, A.
Author_Institution :
Dept. of Electr. Eng., Tsinghua Univ., Beijing
Abstract :
A novel criterion for neutral current differential protection is presented in this paper, which is based on a full research into exist neutral current differential protection schemes used in transmission lines. Compared to traditional ones, the novel criterion can improve the sensitivity under internal fault conditions and improve reliability under external fault conditions. More importantly, the novel criterion overcomes the deficiency of sensitivity of traditional criteria under single-pole open condition and possesses more satisfactory performance. The applicable range of the novel criterion is given by theoretic analysis and simulation results are presented to verify the applicability and effectiveness of the proposed criterion
Keywords :
neutral currents; power transmission faults; power transmission protection; power transmission reliability; sensitivity; internal fault condition; neutral current differential protection; reliability; single-pole open condition; transmission line; Analytical models; Automation; Digital relays; Logic; Partial response channels; Power system protection; Power system relaying; Power transmission lines; Protective relaying; Transmission line theory;
Conference_Titel :
Universities Power Engineering Conference, 2006. UPEC '06. Proceedings of the 41st International
Conference_Location :
Newcastle upon Tyne
Print_ISBN :
978-186135-342-9
DOI :
10.1109/UPEC.2006.367504