标题：A Fast Directional Comparison Pilot Protection for UHV Transmission Line
作者：Ma, Yueyang; Zou, Guibin; Gao, Zhanjun; Du, Tao
作者机构：[Ma, Yueyang; Zou, Guibin; Gao, Zhanjun] Shandong Univ, Sch Elect Engn, Jinan 250061, Peoples R China.; [Du, Tao] Shandong Univ, Elect Power Co, Jin 更多
会议名称：IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)
会议日期：OCT 25-28, 2016
来源：2016 IEEE PES ASIA-PACIFIC POWER AND ENERGY ENGINEERING CONFERENCE (APPEEC)
关键词：UHV transmission line; fault component; pilot protection; current; average value
摘要：This paper proposes a new pilot protection method for ultra-high voltage (UHV) transmission line, which is based on the characteristics of the average value of the fault component current. Theoretic analysis shows for an internal fault, the signs of the average values of the fault component current detected by relays on both ends of the line are identical, while they are opposite for an external fault. Through comparing the signs of the average values detected by two relays on both ends of the line, an internal fault can be distinguished from an external fault. Using PSCAD software, a 1000 kV transmission line model was constructed, and extensive simulations were performed. The simulation results indicate the validity and feasibility of the proposed protection method.