Inclusion of the Gary and Skilling-Humoto represetnations in three-phase transmission line modelos: Aplications in electromagnetic transient simulations in power systems

Abstract

In this project will be developed a three-phase transmission line model that takes into account the corona effect. The model will be developed directly in the time domain and it will be based on the assumption that a small segment of three-phase line can be represented by a circuit consisting of lumped elements (resistance, inductance, capacitance and conductance). The implementation of the corona effect in the line model will be based on models of Gary and Skilling-Umoto that, currently, is used to insert the corona effect in models of single-phase transmission lines. The model to be developed can be used to represent generic three-phase lines, regardless of the same geometry in electromagnetic transient simulations that can occur in power systems. The great contribution that will result from development of this project will be providing a more complete model line that the models currently available for the proposed model can be applied to any three-phase line, regardless of the geometry of it, and take into account the corona effect on line, which is responsible for distortion in the waveform of currents and voltages which propagate along the same during the occurrence of disturbances. A more accurate model line, which provides for such distortions may be useful in the analysis of the protection system, allowing a more precise adjustment and increasing the reliability of the electric power system.