Title :
A Transmission Line Unit Protection Technique Based Combination Modulus by Using Mathematical Morphology
Author :
Yuqin, Xu ; Zengping, Wang ; Jia, Bai ; Hai, Zhang
Author_Institution :
Sch. of Electr. Eng., North China Electr. Power Univ., Baoding
Abstract :
This paper presents a concept of combination modulus (CM) to solve the problem that the transient-based protection techniques may fail to detect faults under certain conditions. The CM features are analyzed and discussed in detail. A novel transmission line unit protection scheme is proposed by comparing transient current CM polarity. The mathematical morphology (MM) technique is used to extract the polarity features from fault-generated current wave signals propagating along transmission lines during a post-fault period. The simulation results of the ATP/EMTP software show that the reliability of the protection scheme proposed has been considerably improved.
Keywords :
power system protection; transmission lines; combination modulus; fault-generated current; mathematical morphology; transmission line unit protection; Morphology; Power system protection; Power system reliability; Power system simulation; Power system transients; Power transmission lines; Protective relaying; Shape; Transmission lines; Voltage; Ultra-high-speed protection; combination modulus; current traveling wave polarity; mathematical morphology; power transmission lines;
Conference_Titel :
Power System Technology, 2006. PowerCon 2006. International Conference on
Conference_Location :
Chongqing
Print_ISBN :
1-4244-0110-0
Electronic_ISBN :
1-4244-0111-9
DOI :
10.1109/ICPST.2006.321568
