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Fault (power engineering)

About: Fault (power engineering) is a research topic. Over the lifetime, 119772 publications have been published within this topic receiving 981679 citations.


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TL;DR: In this article, the authors analyse the security of these countermeasures with respect to the second-order fault model considered by their authors and propose a new method allowing them to implement a CRT-RSA that resists to this kind of secondorder fault attack.
Abstract: Since their publication in 1996, Fault Attacks have been widely studied from both theoretical and practical points of view and most of cryptographic systems have been shown vulnerable to this kind of attacks. Until recently, most of the theoretical fault attacks and countermeasures used a fault model which assumes that the attacker is able to disturb the execution of a cryptographic algorithm only once. However, this approach seems too restrictive since the publication in 2007 of the successful experiment of an attack based on the injection of two faults, namely a second-order fault attack. Amongst the few papers dealing with second-order fault analysis, three countermeasures were published at WISTP’07 and FDTC’07 to protect the RSA cryptosystem using the CRT mode. In this paper, we analyse the security of these countermeasures with respect to the second-order fault model considered by their authors. We show that these countermeasures are not intrinsically resistant and we propose a new method allowing us to implement a CRT-RSA that resists to this kind of second-order fault attack.

25 citations

Journal ArticleDOI
TL;DR: In this article, a generator winding fault on a 75MVA generator is described, which was allowed to persist for 89 minutes before clearing, with no detectable iron burning in evidence and with very little loss of copper.
Abstract: Since 1951, all unit-connected generators of New England Electric have been grounded using a ground fault neutralizer. The total experience to date, which amounts to over 72 million kVA years, indicates that this grounding method is reliable, effective, and superior to other commonly used techniques. In addition to high sensitivity of ground fault detection, which is illustrated by an actual experience, the ground fault neutralizer also greatly reduces the residual current at the fault location. The claim has been made that the fault current is small enough so as to practically eliminate the danger of iron damage, thus permitting the continued operation of the generator until an orderly shutdown can be arranged. This claim has now been substantiated by experience. A generator winding fault on a 75MVA generator is described, which was allowed to persist for 89 minutes before clearing, with no detectable iron burning in evidence and with very little loss of copper.

25 citations

Journal ArticleDOI
TL;DR: In this article, the performance of the 220kV TL network during arcing faults is studied with the aid of the PSCAD/EMTDC program together with a specially designed arcing fault custom model incorporated in the program.

25 citations

Proceedings ArticleDOI
Hengxu Ha1, Yang Yu1, RuiPeng Yi1, Zhiqian Bo2, Bo Chen 
13 Dec 2010
TL;DR: In this paper, a traveling wave based differential protection for HVDC transmission line is proposed, in which the backward traveling waves in mode 1 are employed to establish the traveling wave-based protection, at the same time the zero-mode current detector is utilized to determine that which is the faulty line for bipolar HVDc lines.
Abstract: In this paper, the traveling wave based differential protection for HVDC transmission line is proposed, in which the backward traveling waves in mode 1 are employed to establish the traveling wave based protection, at the same time the zero-mode current detector is utilized to determine that which is the faulty line for bipolar HVDC lines. The operating traveling wave is the differential of the backward traveling wave between two terminals, at the same time the sum of the two traveling waves multiplied a factor as the restraint wave. The entire protection scheme is simulated in PSCAD/EMTDC associated with the typical ±500kV HVDC transmission system supplied by Cigre. The simulating results show that the new protection has the advantages of higher sensitivity, reliability and security. The maximum fault resistance can be overcame by the new differential protection increases to 500 Ohm, in addition, the discriminative results are correct in arbitrary conditions, such as, various fault location of internal fault, the DC bus fault, the AC system fault, etc.

25 citations

Journal ArticleDOI
TL;DR: In this paper, a zero assignment technique is used to attenuate band-limited noises, and an optimal dynamic fault detection filtering approach is proposed by locating the zeros to the noise frequencies and optimizing the poles.
Abstract: In practical engineering, it is inevitable that a system is perturbed by noise signals. Unfortunately, H infin /H infin filtering may fail to detect some faults when the noise distribution matrix are the same as the fault distribution matrix. In this paper, it is shown that the dynamic feedback gain of a dynamic filter introduces additional zeros to the filter, and both the filter poles and the additional zeros can be assigned arbitrarily. In order to attenuate band-limited noises, the zero assignment technique is used, and an optimal dynamic fault detection filtering approach is proposed by locating the zeros to the noise frequencies and optimizing the poles. Compared to other dynamic filter design approaches, the zero assignment technique gives a better tradeoff between more design freedom and computation costs. As shown in the simulation, a better noise attenuation and fault detection performance have been obtained. The zero assignment in multivariable fault detection filter design would be the main contribution of this paper.

25 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2022205
20215,455
20207,904
20199,944
20188,526
20177,614