Analysis of Power System Transients Considering High-Frequency Behavior of Grounding System
Project Description:
Power system grounding is a practice done to satisfy two objectives: 1) to guarantee the safety of the personnel working near the equipment against electrocution, and 2) to absorb and dissipate the surges and fault components coming from the power network. To such an aim, an interconnected complex of horizontal and sometimes vertical conductors are buried under the surface of the earth, with multiple connections to certain points of the electric equipment, such as the transformer neutrals or surge arrester ground terminations.
Power system grounding is a practice done to satisfy two objectives: 1) to guarantee the safety of the personnel working near the equipment against electrocution, and 2) to absorb and dissipate the surges and fault components coming from the power network. To such an aim, an interconnected complex of horizontal and sometimes vertical conductors are buried under the surface of the earth, with multiple connections to certain points of the electric equipment, such as the transformer neutrals or surge arrester ground terminations.
The complex geometry of the grounding grids, the direct contact of their conductors with the soil, and the nonlinear characteristics of the soil make it difficult to analyze the behavior of grounding grids. In this project, we try to accurately study and model the behavior of the grounding systems in a wide frequency range and then develop an interface between the grounding grid and the system above ground in EMT-type software. This way, we can ascertain the equipment are safely protected against undesirable high-frequency transient phenomena.
