In this paper, an effective fault location technique is proposed. Using the current samples of the distribution feeder measured at the substation, the proposed technique first determines the type of fault. Furthermore, an artificial neural network (ANN) is trained for each type of fault. The ANNs are trained to estimate the fault distance to the substation (FDANN).The Inputs of the ANNs are dat...

Transmission lines are usually suspended from steel towers and provided with one or more earth wires. Therefore the earth fault resistance during flash over on the isolators is only few ohm. In the case of rare arc faults, at mid-span, or during flash over to trees, very high impedance faults may result. Depending on the setting of the zones in R-direction, a maximum of some tens of ohms can be...

Distance relaying techniques based on the measurement of impedance at the fundamental frequency between the fault location and the relaying point have attracted widespread attention. The sampled voltage and current data at the relaying point are used to classify the type of fault involving the line with or without fault resistance present in the fault path. The accuracy of the fault classificat...

Power transmission and distribution lines are the vital links that achieve the essential continuity of service of electrical power to the end users. Transmission lines connect the generating stations and load centers. As the generating stations are far away from the load centers they run over hundreds of kilometers. Hence, the chances of fault occurring in transmission lines are very high. Sinc...

Fault location and distance protection are essential smart grid technologies ensuring reliability of the power system. This paper describes an accurate algorithm for locating faults on double-circuit transmission lines. The proposed approach is capable of identifying the faulted circuit of a parallel transmission line by checking the estimated fault location and fault resistance. Voltage and cu...

We scale the various parameters deening a 3D fault model (i.e. characteristic distance and time of a state friction law, size and aspect ratio of the fault, medium impedance) and derive two dimensionless parameters governing the typical dynamics of the fault through single or multiple ruptures. The diier-ent faulting regimes are illustrated by a series of numerical simulations. As the parameter...

This paper proposes a distance measure of neutrosophic numbers and a similarity measure based on cosine function, and then develops the misfire fault diagnosis method of gasoline engines by using the cosine similarity measure of neutrosophic numbers. In the fault diagnosis, by the cosine similarity measure between the fault knowledge (fault patterns) and required diagnosistesting sample with ne...

in this research, a new mathematical modeling on strength changes due to reservoir elastic stresses across the preexisting fault plane is introduced. the method has been applied to the dalpari fault, which is one of the potential seismic sources in the vicinity of the karkheh reservoir. in this method the distribution of total stress across the fault cannot be determined because the initial str...

In recent years Angiostrongylus vasorum has become another important heart parasite of dogs besides Dirofilaria immitis, with intense spread into new areas of Europe. The first two cases of canine angiostrongylosis in Slovakia were observed in 2013, demonstrating that this life-threatening parasitic disease of dogs has expanded into this territory too. One year after the first A. vasorum findin...