Authors: ER Sandeep Tandon
Abstract: This paper presents a detailed simulation and analysis of unsymmetrical faults (LG, LL, LLL) in a three-phase grid interconnection using MATLAB/Simulink. The model includes two voltage sources representing grid ends, connected via a two-pi section transmission line to simulate realistic power transfer conditions. The system response to each fault type is analyzed in terms of voltage and current distortions. Separate fault simulations are carefully modeled using practical parameters. Output data is collected using Workspace blocks and statistically analyzed to extract minimum, maximum, and mean values. Comparative tables and waveform plots illustrate the behavior of each fault type. Additionally, the paper discusses the theoretical basis of fault currents using symmetrical components. The study aims to serve as a base model for educators, researchers, and developers of AI-based fault detection systems.
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