Data and Code for: Voltage Stability and Transmission Congestion Assessment of the Ethiopian National Grid Using FVSI, Lmn, and RoCoF Indices

This repository contains all datasets and analysis scripts supporting the manuscript: "Voltage Stability and Transmission Congestion Assessment of the Ethiopian National Grid Using FVSI, Lmn, and RoCoF Indices" Authors: Sena Gemechis File, Henok Ayele Behabtu, Biniyam Tadesse CONTENTS: ── data/processed/ (21 CSV files)   01_bus_voltage_profile.csv       — Bus voltage magnitudes and deviations   02_voltage_violations.csv        — Buses with V < 0.95 pu   03_load_by_voltage_level.csv     — Load distribution by kV level   04_generation_summary.csv        — Generator summary statistics   05_generation_fleet.csv          — Full generation fleet parameters   06_transformer_summary.csv       — Transformer branch summary   07_load_by_zone.csv              — Regional load distribution   08_network_summary.csv           — Network topology summary   09_fvsi_per_line.csv             — FVSI and Lmn for all 202 circuits   10_vsi_bus_ranking.csv           — Composite VSI ranking for all buses   11_line_loading.csv              — Thermal loading for rated branches   12_congestion_summary.csv        — Critical and high congestion lines   13_inertia_rocof.csv             — Inertia and RoCoF for all generators   14_bus_index.csv                 — Bus name to number mapping   15_powerflow_bus.csv             — AC power flow bus results   16_powerflow_branch.csv          — AC power flow branch results   17_pv_curve_data.csv             — P-V curve data   18_qv_curve_data.csv             — Q-V curve data   19_n1_contingency_results.csv    — N-1 DC contingency results (8 circuits)   20_vsi_sensitivity.csv           — VSI sensitivity (1,000 Dirichlet trials)   21_qmargin_bus.csv               — Analytical Q-margin per bus ── matlab/   eth_grid_case_v2.m               — Validated 163-bus MATPOWER case file ── python/   step1_extract_clean.py           — Data extraction and cleaning   step2_vsi_computation.py         — FVSI, Lmn, and composite VSI computation   step3c_validation_analysis.py    — FVSI-Lmn correlation and VSI sensitivity   step3c_qmargin_analysis.py       — Analytical Q-margin computation NETWORK DATA SOURCE:The underlying raw network data are from the validated MATPOWER case published by Tadesse et al. (2026), IEEE Access, DOI: 10.1109/ACCESS.2026.3666293 SOFTWARE:MATLAB R2024a + MATPOWER 8.1Python 3.13 (pandas, numpy, scipy)