DocumentCode :
146140
Title :
A novel distance protection algorithm for long-distance transmission lines
Author :
Zhong, Yong-Wei ; Kang, X.N. ; Jiao, Z.B.
Author_Institution :
Sch. of Electr. Eng., Xi´an Jiaotong Univ., Xi´an, China
fYear :
2014
fDate :
March 31 2014-April 3 2014
Firstpage :
1
Lastpage :
5
Abstract :
In this paper, a novel distance protection algorithm for long-distance transmission lines is introduced to cater for the problems of the influence caused by distributed capacitance in the long-distance transmission lines and the low fault resistance tolerance by traditional distance relays. To tackle the problem caused by the distributed capacitance in the transmission line, the observing point is moved to the setting point from the relay point by using the Bergeron equations to improve the accuracy of measurement when a fault occurs around the remote terminal. Meanwhile, to tackle the problem of low fault resistance tolerance ability by traditional distance relays especially for phase-ground faults, a new distance protection algorithm concerning the impact of the fault resistance and the opposite system is proposed at the observing point using the information extracted by matrix pencil algorithm. At last, data from PSCAD simulation software demonstrate that the proposed distance protection algorithm can trip the breaker correctly for an internal fault even with high fault resistance and will not overreach for an external fault.
Keywords :
power system simulation; power transmission faults; power transmission lines; power transmission protection; relay protection; transmission line matrix methods; Bergeron equations; PSCAD simulation software; distance protection algorithm; distance relays; distributed capacitance; information extraction; long-distance transmission lines; low fault resistance tolerance; matrix pencil algorithm; observing point; phase-ground faults; relay point; setting point; distance protection algorithm; distributed capacitance; fault resistance; long-distance transmission lines; matrix pencil algorithm;
fLanguage :
English
Publisher :
iet
Conference_Titel :
Developments in Power System Protection (DPSP 2014), 12th IET International Conference on
Conference_Location :
Copenhagen
Print_ISBN :
978-1-84919-834-9
Type :
conf
DOI :
10.1049/cp.2014.0128
Filename :
6822936
Link To Document :
بازگشت