Journal ArticleDOI
Generalised polyphase fault-analysis program: calculation of cross-country fault
L. Roy
- Vol. 126, Iss: 10, pp 995-1001
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TLDR
In this paper, a general computer program using the phase co-ordinate technique has been developed for analysing series, shunt and simultaneous faults on balanced and unbalanced polyphase electrical networks, eliminating the need for maintaining numerous fault analysing subroutines, one for each kind of fault, and making the solution of many difficult and previously unsolvable problems possible.Abstract:
A general computer program using the phase co-ordinate technique has been developed for analysing series, shunt and simultaneous faults on balanced and unbalanced polyphase electrical networks. The program eliminates the need for maintaining numerous fault analysing subroutines, one for each kind of fault, and makes the solution of many difficult and previously unsolvable problems possible. It is employed to analyse the cross-country fault involving different phases. The solution method, program outlines and postfault results of voltages, currents and apparent power of an actual power system are given.read more
Citations
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Journal ArticleDOI
Distribution system short circuit analysis-A rigid approach
TL;DR: The solution method is an iterative compensation method, which uses a single optimally ordered factorization of the bus admittance matrix, commonly used in power flow analysis, to simulate the fault condition and enables a factorized Y/sub Bus/ solution, resulting in many advantages.
Journal ArticleDOI
Unified phase-coordinate load-flow and fault analysis of polyphase networks
M.A. Laughton,A.O.M. Saleh +1 more
TL;DR: The capability of the method of phase coordinates to extend the range of power system network analysis beyond the scope of transformation methods, such as the symmetrical component method, without incurring any increase in model complexity is illustrated.
Journal ArticleDOI
A comprehensive approach to fault analysis using phase coordinates
Mario Montagna,G.P. Granelli +1 more
TL;DR: In this paper, a general approach to the analysis of faulted power systems using phase coordinates is presented, where any combination of shunt, series and cross-country faults can be handled in a straightforward and general way.
Proceedings ArticleDOI
Cross-country fault protection in ENEL Distribuzione's experimental MV loop lines
Asia Codino,Fabio Massimo Gatta,Alberto Geri,Regina Lamedica,Stefano Lauria,Marco Maccioni,Alessandro Ruvio,Roberto Calone +7 more
TL;DR: Results show that the zero-sequence and phase directional overcurrent (Blocking-Scheme supported) are generally able to selectively identify and clear CCFs, Nevertheless, if CCFs occur in the same overhead stretch of the loop line, the adopted protection scheme may fail.
Journal ArticleDOI
Internal fault fast identification criterion based on superimposed component comparison for power transformer
TL;DR: In this article, a new time-interval based criterion for transformer differential protections is proposed, aiming at identifying transformer fault type by virtue of highly accurate time interval, and a novel filter algorithm is proposed to determine the time interval for its excellent singularity detecting and effective noise-repressing ability.
References
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Journal ArticleDOI
Method of Symmetrical Co-Ordinates Applied to the Solution of Polyphase Networks
TL;DR: In this article, a general discussion of unsymmetrical systems of co-planar vectors leads to the conclusion that they may be represented by symmetric systems of the same number of vectors, the number of symmetrical systems required to define the given system being equal to its degrees of freedom.