Rafael Silva Alipio

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Publications associées (22)

Importance of Ground Return Parameters in Transient Analysis of Overhead Wires

Farhad Rachidi-Haeri, Rafael Silva Alipio

This study assesses the accuracy of the formulations of Carson and Sunde in modeling ground effects on overhead wires, particularly for high-frequency transients and high-resistivity soils. The results reveal that these traditional formulations tend to und ...

International Union of Radio Science (URSI)2023

Assessment of the Transient Response of Wind Turbine Grounding Systems to Upward Negative Lightning

Marcos Rubinstein, Mohammad Azadifar, Farhad Rachidi-Haeri, Rafael Silva Alipio

2023

An FDTD-Based Formulation for Solving the Transmission Line Equations for a Bare Wire Buried in a Dispersive Soil

Farhad Rachidi-Haeri, Rafael Silva Alipio

2023

Closed-Form Expressions for the Calculation of the Ground-Return Impedance and Admittance of Underground Cables

Rafael Silva Alipio

This paper proposes closed-form expressions for the calculation of the ground-return impedance and admittance of underground cables. The proposed expressions are shown to reproduce the integral equations of Xue with great accuracy for a wide range of groun ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2023

Assessment of the Feasibility of Applying the Electromagnetic Time Reversal Theory to Locate Defects in Grounding Electrodes

Farhad Rachidi-Haeri, Marcos Rubinstein, Hamidreza Karami, Rafael Silva Alipio

In recent years, the electromagnetic time reversal (EMTR) theory has been successfully applied for locating various sources of disturbances, such as short-circuit faults, in power systems. In this paper, a theoretical analysis of the feasibility of applyin ...

2023

Tower-foot grounding model for EMT programs based on transmission line theory and Marti's model

Rafael Silva Alipio

This paper proposes a tower-foot grounding system model compatible with EMT programs which might be useful for the simulation of lightning transients in overhead lines. The proposed model is based on the solution of the telegrapher's equations and the appl ...

Elsevier2023

On the Use the Electromagnetic Time Reversal Theory to Locate Breakpoints in Grounding Electrodes

Farhad Rachidi-Haeri, Marcos Rubinstein, Hamidreza Karami, Rafael Silva Alipio

2023

A Comprehensive Analysis on the Influence of the Adopted Cumulative Peak Current Distribution in the Assessment of Overhead Lines Lightning Performance

Rafael Silva Alipio

Backflashover rate (BFR) is strongly dependent on the cumulative peak current distribution (CCD) adopted in the calculations. An original aspect of the present work is that such dependence is simultaneously assessed in estimating the probability of the cri ...

MDPI2023