This paper presents a new approach for simulating the internal faults of synchronous machines using distributed computing and Large Change Sensitivity (LCS) analysis. LCS analysis caters for a parallel solution of 3-phase model of a faulted machine within the symmetrical componentbased model of interconnected network. The proposed method considers dynamic behavior of the faulty machine and conn...

This paper investigates the application of wavelet transform as a preprocessor for neural networks (NN) in identifying internal turn-to-turn faults in transformer windings. The faulty and normal signals generated by numerical simulation of ElectroMagnetic Transient Program (EMTP) are preprocessed using discrete wavelet transform (DWT). The mean values of the wavelet coefficients are input into ...

With the advances in semi-conductor devices, adjustable speed drives (ASDs) have become more prevalent than ever before in industrial and commercial processes. Many facilities are installing ASDs to improve the efficiency of their processes and to increase the control of their processes. While the effects of ASDs on the power system are well known, many engineers and systems integrators are not...

Earlier work at Texas A&M University led to the development of transmission line fault location algorithms that were based on synchronized sampling of the voltage and current data from the two ends of the line. The line models used in the algorithms were based on lumped parameter models for electrically short lines, or lossless distributed parameter models for electrically long lines. In this p...

Recent power quality studies have been focused on the source-identification of voltage disturbances at distribution network busses. This paper describes a method aimed at correlating indirect-lightning events with power systems relay operations, associated with voltage dips. The proposed method, based on the coordinated use of the Italian lightning location system CESI-SIRF, the Italian monitor...

Power system protective relaying systems are striving to meet the demands of systems which are ever increasing in complexity. . High-speed digital relays must make decisions while the power system is still in transition. Understanding the operation and performance of microprocessor based relays requires new engineering tools. Current transformer (CT) and relay modeling are practical tools to ev...

Although much effort has been devoted in the last decade to solve the problem of synthesizing the frequency dependent transformation matrix in unbalanced multiphase cable system, we believe the best solution is to completely eliminate the necessity of the frequency dependent transformation matrix. This paper presents advances in the development of a new cable model (zCable) which splits the rep...

This paper describes a new solution for an automated analysis of the substation equipment operation during fault disturbances. An expert system, developed earlier for automated analysis of digital fault recorder (DFR) files, is the basis for the new solution. The expert system makes an analysis based on outputs of the signal processing algorithms used to calculate waveform parameters for the fa...

This paper presents a new numerical algorithm for fault location on transmission lines. It does not require line parameters, which is a radical step forward compared to the existing approaches, which require this information, so the algorithm can be considered as a settings-free algorithm. Line parameters are only approximately constant; they differ with the loading and weather conditions. Thus...

La investigación indaga en el uso de métodos predictivos mediante Minería Datos Educacionales, utilizando árboles decisión para determinar las necesidades perfeccionamiento competencias pedagógicas profesores EMTP y contribuir con investigaciones que fortalezcan la formación docente. se emprendió desde un diseño anidado concurrente varios niveles tres etapas. En este artículo da cuent...