DocumentCode
3186055
Title
Design and development of a digital multifunction relay for generator protection
Author
Yalla, M.V.V.S.
Author_Institution
Beckwith Electr. Co. Inc., Largo, FL, USA
fYear
2001
fDate
2001
Firstpage
491
Lastpage
494
Abstract
This paper presents the design and development of a rotor earth fault protection function as part of a multifunction generator protection relay. The relay design is based on a low frequency square wave injection method in detecting rotor earth faults. The accuracy of rotor earth fault resistance measurement is improved by applying piecewise quadratic approximation to the nonlinear gain characteristic of the measurement circuit. The paper also presents the hardware and software architecture of the relay
Keywords
approximation theory; earthing; electric generators; electrical faults; fault diagnosis; machine protection; machine testing; machine theory; relay protection; rotors; design; development; digital multifunction relay; generator protection; hardware architecture; low frequency square wave injection method; measurement circuit; nonlinear gain characteristic; piecewise quadratic approximation; rotor earth fault detection; rotor earth fault protection function; rotor earth fault resistance measurement; software architecture;
fLanguage
English
Publisher
iet
Conference_Titel
Developments in Power System Protection, 2001, Seventh International Conference on (IEE)
Conference_Location
Amsterdam
ISSN
0537-9989
Print_ISBN
0-85296-732-2
Type
conf
DOI
10.1049/cp:20010206
Filename
929370
Link To Document