Journal ArticleDOI
Design Principles of a New Generator Stator Ground Relay for 100% Coverage of the Stator Winding
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TLDR
In this paper, a relay for detecting ground on the stator windings of generators is proposed, which provides 100% coverage of the windings with measurement of the fundamental and third harmonic components of the residual voltage at the terminals of the generator and the voltage across the grounding resistor at the neutral of a generator.Abstract:
The design principles of a new relay for detection of grounds on the stator windings of generators is discussed. The relay provides 100% coverage of the stator windings with measurement of the fundamental and third harmonic components of the residual voltage at the terminals of the generator and the voltage across the grounding resistor at the neutral of the generator. The design concepts of the detectors utilizing the third harmonic components of the above signals are based on measurements of these signals on a number of Ontario Hydro thermal units.read more
Citations
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Journal ArticleDOI
Adaptive ground fault protection schemes for turbogenerator based on third harmonic voltages
TL;DR: In this paper, two adaptive stator ground fault protection schemes based on digital techniques are developed, which can automatically track the change of generator operating conditions before a ground fault occurs, compared to conventional third-harmonic voltage schemes.
Journal ArticleDOI
Differential Protection Based on Zero-Sequence Voltages for Generator Stator Ground Fault
Tai Nengling,J. Stenzel +1 more
TL;DR: In this article, a new differential protection scheme based on zero-sequence voltages with 100% coverage for generator stator ground faults is proposed, which exploits the fault information of both the zero sequence fundamental voltage and the third-harmonic voltage.
Journal ArticleDOI
Grounding and ground fault protection of multiple generator installations on medium-voltage industrial and commercial power systems - Part 1: The problem defined Working Group Report
P. Pillai,B.G. Bailey,J. Bowen,G. Dalke,B.G. Douglas,J. Fischer,J.R. Jones,D.J. Love,Charles J. Mozina,N. Nichols,C. Normand,L. Padden,A. Pierce,L.J. Powell,D.D. Shipp,N.T. Stringer,R.H. Young +16 more
TL;DR: In this article, the authors discuss typical grounding practices and ground fault protection methods for medium-voltage generator stators, highlighting their merits and drawbacks, and provide an overview of the generator damage mechanism during stator ground faults.
Journal ArticleDOI
Adaptive 100% Stator Ground Fault Protection Based on Third-Harmonic Differential Voltage Scheme
Nader Safari-Shad,Russ Franklin +1 more
TL;DR: The paper presents a new adaptive 100% stator ground protection for high-impedance-grounded (HIG) synchronous generators which is a zero-setting scheme which does not require any setting calculations, 3rd-harmonic voltage testings, or additional hardware.
Journal ArticleDOI
Wavelet-based ground fault protection scheme for generator stator winding
TL;DR: In this article, a new stator ground fault protection scheme is introduced based on wavelet transform, particularly the multiresolution analysis (MRA) technique, which can detect the ground fault with high sensitivity and selectivity during all operating conditions.
References
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Journal ArticleDOI
A Comparison of 100 Percent Stator Ground Fault Protection Schemes for Generator Stator Windings
TL;DR: In this paper, three different schemes for detecting single-phase-to-ground faults in 100% of the generator stator winding are described, and a chart comparing the significant application characteristics of the three schemes is presented.
Journal ArticleDOI
Performance of Third Harmonic Ground Fault Protection Schemes for Generator Stator Windings
TL;DR: In this paper, the authors show how the normally generated third-harmonic voltage can be used to protect the lower ten to twenty percent of generator stator windings against ground faults, and a method of determining the applicability of the scheme to a given machine is described which takes into account the design of the generator and its externally connected apparatus.
Journal ArticleDOI
Generator Ground Fault Protection Using Overcurrent, Overvoltage, and Undervoltage Relays
C. H. Griffin,J. W. Pope +1 more
TL;DR: In this paper, the authors describe the relaying schemes employed by Georgia Power Company to protect synchronous generators from single-phase-to-ground faults, and the proper method of selecting the generator grounding components and protective relays is described.
Journal ArticleDOI
Stator earth-leakage protection for large generators
TL;DR: In this article, a generator protection is described which is capable of detecting earth leak, ages in any point of the stator winding and deterioration of insulation over parts of the winding adjacent to the neutral point.