Proceedings ArticleDOI
Third harmonic differential over current relay based protection system for stator ground fault in synchronous generator
Md. Asif Chowdhury,Kazi Taimur Reza,Md. Didarul Alam,Enamul Basher +3 more
- pp 606-609
TLDR
In this paper, a new method is proposed for 100% protection against the stator earth fault in synchronous generator, which combines conventional ground fault schemes with a third harmonic differential over current protection scheme.Abstract:
In this paper, a new method is proposed for 100% protection against the stator earth fault in synchronous generator. Conventional ground fault protection schemes can be applied to any generator but it covers at most 95% of generator stator length. For ensuring 100% protection of synchronous generator stator winding, conventional ground fault schemes are combined with our proposed third harmonic differential over current protection scheme. Moreover, an investigation into the differences between first harmonic fault current and third harmonic fault current is performed. By using proper simulation model, earth faults are simulated at various distant points from the generator neutral and using this simulations, first harmonic fault current and third harmonic fault current characteristics are properly distinguished. Finally, the threshold current of our proposed differential third harmonic over current relay is selected based on the results of the simulations.read more
Citations
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Journal ArticleDOI
Ground Fault Detection Method for Variable Speed Drives
TL;DR: A new method to detect ground faults in variable speed drives is presented, based on the analysis of the terminal voltage signal of a grounding resistor connected between the neutral at the secondary of the main power transformer and ground.
Differential Protection Analisys For Detection Of Ground Faults On the Generator Stator
Christian H. Fernandez Alvarez,Carlota M. Pinos Veintimilla,Flavio Alfredo Quizhpi Palomeque +2 more
TL;DR: The analysis of the restricted earth fault differential protection based on the implementation of a low impedance scheme that allows the protection of 3.5 kVA generator windings using the overcurrent relay in differential structure is presented in this paper .
References
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Book
Power System Protection
TL;DR: P.P. Anderson, a noted expert on power systems, presents an analytical and technical approach to power system protection, showing how abnormal system behavior can be detected before damage occurs, and points to effective control action to limit system outages.
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Protection techniques in electrical energy systems
TL;DR: Fundementals of protection engineering: the principal faults on electrical power systems and system components the main criteria for detecting faults instrument transformers for protection purposes.
Journal ArticleDOI
ANN-based novel fault detector for generator windings protection
TL;DR: In this article, an artificial neural network (ANN) based internal fault detector algorithm for generator protection is proposed, which uniquely responds to the winding earth and phase faults with remarkably high sensitivity.
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.
Proceedings ArticleDOI
A new Wavelet based ground fault protection scheme for turbo generators
S.A. Gafoor,P.V. Ramana Rao +1 more
TL;DR: In this article, the authors proposed a protection scheme for turbo generators to detect stator ground faults in particular closer to neutral, which considers total generated voltage of the machine and makes use of Wavelet Multi Resolution Analysis.