Proceedings ArticleDOI
Multi-criteria relaying strategy for single phase to ground fault in MV power systems
Jia Qingquan,Yang Qixun,Yang Wei,Yang Yihan,Song Jiahua +4 more
- Vol. 2, pp 683-687
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TLDR
In this article, a wavelet based transient method is proposed to extend the use of fault information and a D-S evidence theory is introduced to deal with the fusion of multi criteria.Abstract:
This paper devotes research to the single phase to ground fault line detection problem in neutral nondirect earthed power systems. A concept of fault measures is introduced to quantitatively describe the degree of the fault indication in each line for flexible and reasonable fusion of multi criteria. A wavelet based transient method is proposed to extend the use of fault information. Fault measure algorithms for transient, steady state magnitude and steady state phase angle are formulated respectively. D-S evidence theory is introduced to deal with the fusion of multi criteria. An example obtained from a practical fault is provided to verify the effect of the fault measures, the transient detection method and the D-S combination. The example shows that the novel resorts proposed in this paper can really improve the performance of fault line detection.read more
Citations
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Journal ArticleDOI
A selective single-phase-to-ground fault protection for neutral un-effectively grounded systems
TL;DR: In this paper, a single-phase-to-ground fault protection for NUGS is proposed, which is based on the measurement of the zero-sequence voltage and zero sequence current.
Proceedings ArticleDOI
Single-phase-to-ground fault feeder detection based on transient current and wavelet packet
TL;DR: In this article, a fault-feeder selection method based on transient signals and wavelet packet was proposed to detect single-phase-to-ground fault in distribution network. But, the application of transient signal is emphasized.
Proceedings ArticleDOI
A Novel Single-Phase Earth Fault Feeder Detection by Traveling Wave and Wavelets
TL;DR: In this paper, a complex frequency B-Spline wavelet is presented to analyze the singular signals of the zero modes of the fault traveling waves in the initial process of the failure.
Proceedings ArticleDOI
A Novel Adaptive Protective Scheme For the Single-Phase Earth Fault of the Non-Effectively Grounded Power Systems
TL;DR: In this paper, a zero-sequence overvoltage protection scheme based on zero-sequential current compensation is proposed, and the fundamental method is based on the measurement of the zero sequence over-voltage, where the tripping time characteristic adopts the inverse time delay.
Proceedings ArticleDOI
An Integrated Phase to Ground Fault Protection for Neutral Compensated Power Networks
TL;DR: In this paper, a D-S evidence theory based fault detecting fusion method is investigated for neutral compensated power networks and three kinds of fault information such as transient, abrupt wave and real power are employed for the purpose.
References
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Computational Methods for A Mathematical Theory of Evidence.
TL;DR: Dempster and Shafer as discussed by the authors presented results that can reduce the compu tationtime complexity from exponential to linear allowing this scheme to be implemented in many more systems, assuming that each piece of the evidence either confirms or denies a single proposition rather than a disjunction.
Journal ArticleDOI
Wavelets: a new tool for the resonant grounded power distribution systems relaying
TL;DR: The wavelet transform of a signal consists in measuring the "similarity" between the signal and a set of translated and scaled versions of a "mother wavelet" as discussed by the authors.
Journal ArticleDOI
A new deal for safety and quality on MV networks
TL;DR: The authors of this paper summarize the major possible alternatives and the reasons which may lead a utility to modify its original choices and the result of this analysis is the decision to change the neutral earthing of rural MV networks.
An approach to approximate reasoning based on the Dempster rule of combination
P. Chatalic,D. Dubois,H. Prade +2 more
TL;DR: A rail pad made of substantially rigid electrically insulating material which is chosen to by yieldable to a predetermined extent is selected to be capable of carrying the required load.
Journal ArticleDOI
Zero sequence directional earth-fault protection with improved characteristics for compensated distribution networks
TL;DR: In this article, the selectivity of directional active power relays for zero-sequence earth-fault protection of compensated medium voltage distribution networks is analyzed based on estimation of zero sequence steady-state currents in compensated networks.