Experience with 100% stator ground fault protection schemes

Author

Mozina, Charles J.

Author_Institution

Consultant with Beckwith Electr. Co., Largo, FL

fYear

2008

fDate

21-24 April 2008

Firstpage

1

Lastpage

7

Abstract

This paper discusses the experiences of several users with the application of three different 100% stator ground fault protection schemes. Two third-harmonic methods and a low frequency-injection method are included. This paper explains situations in which third-harmonic schemes work, and also the limitations of these schemes, which are not well understood by many relay engineers. It also discusses the use of a low-frequency injection scheme along with its limitations.

Keywords

electric generators; fault diagnosis; harmonic analysis; power generation protection; relay protection; generator protection; low frequency-injection method; relay engineers; stator ground fault protection schemes; two third-harmonic methods; Circuit faults; Digital relays; Fault location; Frequency; Grounding; Protection; Protective relaying; Stator windings; Tellurium; Voltage measurement; Generator; Generator Protection; Low-Frequency Injection; Multifunction Digital Relay; Stator Ground Fault; Third-Harmonic Method;

fLanguage

English

Publisher

ieee

Conference_Titel

Transmission and Distribution Conference and Exposition, 2008. T&D. IEEE/PES

Conference_Location

Chicago, IL

Print_ISBN

978-1-4244-1903-6

Electronic_ISBN

978-1-4244-1904-3

Type

conf

DOI

10.1109/TDC.2008.4517122

Filename

4517122