Open AccessDirected protection of the generator
Author(s) -
Nadezhda Buryanina,
Yurii Korolyuk,
M. Koryakina,
Elena Lesnykh,
Konstantin Suslov
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/663/1/012023
Subject(s) - aperiodic graph , transformer , relay , generator (circuit theory) , electrical engineering , shunt generator , electromagnetic coil , protective relay , computer science , self shrinking generator , induction generator , engineering , voltage , physics , mathematics , power (physics) , quantum mechanics , combinatorics , armature (electrical engineering)
In addition to periodic components of industrial frequency, the aperiodic ones arise in windings and on the generator output leads under the conditions of shortcuts. These aperiodic components slow down the operation of the main differential protection of a generator up to ten periods of a network frequency with the application of saturated magnetic cores of current transformers as well as zero current relays and transformer differential protection [1]. This slowing down promotes accidents and can even lead to generator’s winding and steel burn-out at high-ampere currents. The present paper considers the ways to reduce the impact of aperiodic components on the operation of digital relay protection of generators and generator-transformer blocks and proposes generator’s directional digital protection.