DocumentCode :
3483084
Title :
Advances in generator field ground protection using digital technology
Author :
Mozina, Charles J.
fYear :
2004
fDate :
27 June-1 July 2004
Firstpage :
87
Lastpage :
93
Abstract :
Advances in digital technology have provided relay designers with the tools to increase the capabilities of modern generator relays. This allows more sophisticated protection functions to be added to digital relays to provide better generator protection within a single relay hardware platform. Functions such as field ground fault detection and brush lift-off detection are two examples of such relay functions. This paper discusses field ground protection using an injection method recently incorporated into a multifunction digital generator relay. The scheme presented in this paper addresses field ground detection on generators with brushes and an external source of DC field current and voltage. It has been installed on over 150 generators. Though many of today´s new generators are brushless, there still exists a large population of older generators where the scheme described in this paper is applicable. Developed and used in Europe for many years, the scheme lends itself to digital technology and offers many advantages over currently used field ground DC voltage methods.
Keywords :
AC generators; brushes; earthing; machine protection; overvoltage protection; relay protection; short-circuit currents; Europe; brush lift-off detection; generator field ground protection; generator protection; generator relaying; injection method; multifunctional digital relays; real-time monitoring; single relay hardware platform; stray bearing current; Brushes; Circuit faults; DC generators; Digital relays; Fault detection; Hardware; Protection; Protective relaying; Resistors; Voltage control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Pulp and Paper Industry Technical Conference, 2004. Conference Record of the 2004 Annual
ISSN :
0190-2172
Print_ISBN :
0-7803-8282-X
Type :
conf
DOI :
10.1109/PAPCON.2004.1338368
Filename :
1338368
Link To Document :
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