MODELING AND ASSESSMENT OF THE IMPACT OF A 25 KV-50 HZ RAILWAY TRACTION POWER SUPPLY SYSTEM ON THE POWER QUALITY OF THE ELECTRICAL GRID IN VIETNAM
DOI:
https://doi.org/10.62985/j.huit_ojs.vol26.no2E.386Từ khóa:
Harmonics, traction power supply system, non-linear loads, passive filters, power qualityTóm tắt
This paper presents an investigation into harmonic distortion and voltage fluctuations caused by the 25 kV–50 Hz railway traction power supply system and their impact on the power quality of the Vietnamese electrical grid. A detailed traction load model representing train operating modes under Vietnamese conditions is developed in Matlab/Simulink. The study focuses on analyzing key power quality indices, including voltage fluctuations and harmonic distortion at the Point of Common Coupling (PCC). Simulation results illustrate that traction loads generate significant harmonic components and noticeable voltage sag during acceleration. These findings provide a technical basis for selecting appropriate compensation solutions such as D-STATCOM or energy-storage-integrated converters for future railway electrification projects. Furthermore, the study contributes essential insights for planning and integrating 25 kV railway systems into Vietnam’s power grid with improved power quality and operational reliability.
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