Title :
Improved differential protection scheme for long distance UHVDC transmission line
Author :
Xiaodong Zheng ; Nengling Tai ; Thorp, James S. ; Xia Yang
Author_Institution :
Dept. of Electr. Eng., Shanghai Jiaotong Univ., Shanghai, China
Abstract :
This study concerns the misoperation of differential protection of long distance UHVDC transmission line under external faults. The two main factors that have effect on the sensitivity of differential protection long distance UHVDC transmission line are discussed in this study: transient harmonic currents and shunt branch currents. With the improved protection scheme presented in this paper, the two factors can be removed and the reliability and sensitivity of the differential protection can be improved.
Keywords :
HVDC power transmission; power transmission faults; power transmission lines; power transmission protection; power transmission reliability; differential protection scheme; long distance UHVDC transmission line; power transmission reliability; shunt branch currents; transient harmonic currents; Circuit faults; HVDC transmission; Harmonic analysis; Power harmonic filters; Power transmission lines; Transient analysis; UHVDC; differential protection; reliability and sensitivity;
Conference_Titel :
PES General Meeting | Conference & Exposition, 2014 IEEE
Conference_Location :
National Harbor, MD
DOI :
10.1109/PESGM.2014.6938965
