Original scientific paper

TRANSMISSION LINES PROTECTION USING SIPROTEC NUMERICAL RELAYS

ANDREA STOŠIĆ ; AECOM, Manchester, UK
ANTE MARUŠIĆ ; Faculty of Electrical Engineering and Computing, University of Zagreb Unska 3, 10000 Zagreb, Croatia
JURAJ HAVELKA ; Faculty of Electrical Engineering and Computing, University of Zagreb Unska 3, 10000 Zagreb, Croatia

Abstract

This paper analyses the fundamental principles of distance protection
relays while highlighting the importance of correct relay parameterising through
a set of relay tests. Numerical distance relays can have up to 6 distance zones,
and nowadays most of them have a quadrilateral (polygonal) characteristic. The
specific objective of this study was to apply those principles on a SIPROTEC
distance protection 7SA611 relay with the help of Omicron CMC 56 testing
device, as well as to describe the testing process. As a part of the testing, DIGSI
and Test Universe Software were used. Experimental results confirm the
theoretical principles of distance protection and show the advantages of
numerical relays. This paper concludes that optimal choice of reach settings and
time delays between the zones, as well as zone directions, can significantly
impact the selectivity of the protection system, and therefore the scope and time
of the outage.

Keywords

distance protection; numerical relay; polygonal characteristic; SIPROTEC; zone settings

Hrčak ID:

199748

URI

https://hrcak.srce.hr/199748

Publication date:

15.12.2017.

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