Title :
Skewness-Based Differential Protection Scheme for EHV/UHV Transmission Lines
Author :
Zhang, Linda L. ; Wu, Q.H. ; Ji, T.Y. ; Jiang, L.
Author_Institution :
Sch. of Electr. Power Eng., South China Univ. of Technol., Guangzhou, China
Abstract :
This letter proposes a novel differential protection scheme for transmission lines based on skewness. The skewnesses of the differential current and restraining current are used jointly to identify the fault in transmission lines. The proposed scheme does not need to compensate the distributed capacitive current and is immune to noise. The feasibility of proposed scheme has been verified on a 1000 kV transmission line using PSCAD/EMTDC.
Keywords :
high-voltage techniques; power transmission lines; power transmission protection; EHV transmission lines; EMTDC; PSCAD; UHV transmission lines; differential current; restraining current; skewness-based differential protection scheme; voltage 1000 kV; Educational institutions; Fault diagnosis; Noise; Power transmission lines; Sensitivity; Capacitive current; differential protection; higher-order statistics; skewness; transmission line;
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2014.2315497
