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Comparison of Transformer Voltage Configurations for Variable-Speed Drives Under Poor Power Quality Conditions | ||
| Kerbala Journal for Engineering Sciences (KJES) | ||
| Article 1, Volume 6, Issue 2, June 2026, Pages 108-119 PDF (1.16 M) | ||
| Document Type: Research Article | ||
| DOI: 10.63463/kjes1207 | ||
| Author | ||
| Wadah ِAbbas Aljaism* | ||
| Department of Power Engineering, Al-Iraq University College, Basrah, Iraq | ||
| Abstract | ||
| The reliability and effectiveness of variable-speed drives (VSDs) functioning under low power quality (PQ) conditions are examined in this investigation in relation to the transformer secondary electrical voltage selection (132/10 kV with +10% adjustable as opposed to 132/11 kV nominal). A comprehensive simulation environment based on MATLAB/Simulink has been created to model the transient disturbances, swells, and voltage sags that affect a manufacturing medium-voltage (MV) powered VSD structure through simulation. Several essential metrics are assessed quantitatively, such as tripping frequency, DC-bus stability, and the stability of the voltage reliability index (VSI). The 132/11 kV configuration resulted in better DC-bus dependability (VSI = 0.96) and less undesired tripping than the 132/10 kV (+10%) scenario, based on modelling findings. The findings highlight that choosing the right transformer voltage is an essential design element for improving VSD reliability in settings with low power quality. | ||
| Keywords | ||
| transformer ratio; industrial distribution; power quality (PQ); variable-speed drive (VSD); voltage stability; and reliability assessment | ||
| References | ||
|
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