Comprehensive Backup Protection For
Electrical Networks
Author(s)
V. Silbermann
Abstract
Today, the reliable tripping of faults in the networks by failure of main
protection is normally performed with the help of local backup protections,
duplicating the principles of main protection. It provides redundancy only in the
equipment and cannot trip complicated faults by the inability of main protection
to operate due to principle reasons. The usage relays from different
manufacturers for these duplicated protections helps only partially because both
protections are by faults in the same conditions and act in accordance with the
same principles. The damage of protected equipment in this case can be
prevented by using the comprehensive remote backup protection. The most
important difference between local and remote backup protections is that the
remote backup protection acts by faults in the networks under completely
different conditions compared to the main and local backup protections. These
substantial differences can be used only by correct selection of principles and
settings of remote backup protections. This paper reports the principles of
performance of such comprehensive remote and some kinds of local backup
protections separately for HV overhead and cable lines as well as the principles
of selection of characteristics and calculation of settings for corresponding
backup protections.
Keywords: failure or inability of main protection, local and remote backup
protections.
Keywords
failure or inability of main protection, local and remote backup
protections.
Related Book
Other papers in this volume
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