In long transmission lines, the charging current caused by the shunt capacitance decreases the accuracy in impedance based fault location. To improve the accuracy of fault location, this paper presents a novel scheme, where two Digital Fault Recorders (DFRs) are installed in a line. They can send the transient data of the faults to the both ends of a line. To estimate the distance of a fault, i...

Variation source identification for manufacturing processes is critical for product dimensional quality improvement, and various techniques have been developed in recent years. Most existing variation source identification techniques are based on a linear faultquality model, in which the relationships between process faults and product dimensional quality measurements are linear. In practice, m...

The detection of outliers has gained considerable interest in data mining with the realization that outliers can be the key discovery to be made from very large databases. Outliers arise due to various reasons such as mechanical faults, changes in system behavior, fraudulent behavior, human error and instrument error. Indeed, for many applications the discovery of outliers leads to more interes...

This paper presents a new diagnosis method of induction motor faults based on time–frequency classification of the current waveforms. This method is based on a representation space, a selection criterion, and a decision criterion. In order to define the representation space, an optimized time–frequency representation (TFR) is designed from the time–frequency ambiguity plane. The selection crite...

This paper presents a novel method for locating faults using setting point voltage and current data. The line model used is based on the frequency dependent parameter model and it is distributed in to two parts: Distributed Parameter model and Compensation matrix. Finite Impulse Response filters are used to fit the Compensation matrix. So by using local Sampling data, voltage and current at the...

The faults of some components in the TD-SCDMA network can cause failures of equipments and links. The failures will cause many derivative alarms in equipments. In order to find out the faults immediately and accurately, researches on the methods and mechanisms of the alarms’ correlation have been done. In order to reduce the number of alarms and enhance the contents of them, this paper presents...

-This paper presents an algorithm for locating faults on two-terminal power transmission lines. Unsynchronized twoend voltages and currents are processed in the algorithm for determining the distance to fault and the synchronization angle. The calculations are performed initially for the lumped model of the transmission line. Then, these results are used as the initial data for the Newton-Raphs...

This paper presents an artificial neural network based protection scheme for detection and classification of one conductor open faults in parallel transmission line. A 220 kV double circuit transmission line of 100 km length has been simulated using MATLAB® software and its associated Simulink® and Simpowersystem® toolboxes. The fundamental components of current signals measured at relay locati...