DocumentCode
1434682
Title
A New Fault-Impedance Algorithm for Distance Relaying on a Transmission Line
Author
Xu, Zhen Yu ; Xu, G. ; Ran, Li ; Yu, S. ; Yang, Q.X.
Author_Institution
Sch. of Electr. & Electron. Eng., North China Electr. Power Univ., Beijing, China
Volume
25
Issue
3
fYear
2010
fDate
7/1/2010 12:00:00 AM
Firstpage
1384
Lastpage
1392
Abstract
This paper describes a new algorithm to calculate the per phase impedance between the measurement and fault points on a transmission line, featuring robustness to the uncertainties in load current and fault path resistance. The algorithm, which is ideal for distance relaying, is derived based on a justifiable assumption of the fault path being purely resistive, implying that the unmeasured fault point voltage and fault path current are in phase with each other. This paper illustrates the characteristics of the proposed algorithm and evaluates its performance by using PSCAD/EMTDC simulation.
Keywords
electric impedance; power transmission faults; relay protection; PSCAD/EMTDC simulation; distance relaying; fault path resistance; fault points; fault-impedance algorithm; per phase impedance; transmission line; transmission line protection; Distance relaying; fault path resistance; fault-impedance measurement; load current; transmission line;
fLanguage
English
Journal_Title
Power Delivery, IEEE Transactions on
Publisher
ieee
ISSN
0885-8977
Type
jour
DOI
10.1109/TPWRD.2010.2042082
Filename
5427116
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