Transient Electromagnetic Processes Analysis in High Voltage Transmission Lines during Two-Phase Short Circuits

Area of Science:

• Electrical Engineering
• Computational Electromagnetics

Background:

• High-voltage power lines are critical infrastructure.
• Accurate modeling of transient electromagnetic processes is essential for grid stability and protection.

Purpose of the Study:

• To develop a mathematical model for a segment of a high-voltage electric network.
• To simulate transient electromagnetic processes during fault conditions.

Main Methods:

• Development of a mathematical model for a long power line with distributed parameters and an active-inductive load.
• Application of Neumann and Robin-Poincare boundary conditions.
• Implementation of the model in Visual Fortran for numerical simulations.

Main Results:

• Obtained oscillograms of transient electromagnetic processes for voltages and currents.
• Analyzed spatial, temporal, and temporal-spatial distributions during remote two-phase short circuits.
• Simulated line energization to normal and emergency modes, and short circuits to ground.

Conclusions:

• The developed mathematical model and numerical methods accurately simulate transient electromagnetic processes in high-voltage transmission lines.
• The parameter output voltage facilitates universal application of the line model.
• Numerical simulations provide valuable insights into power system behavior under fault conditions.