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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS)
C. L. Toh
Universiti Tenaga Nasional
Control & Systems Engineering Electrical & Electronics Engineering

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Harmonic Mitigation in Traction Supply Substation Using Cascaded H-Bridge Converter A. Awalludin; C. L. Toh
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 9, No 4: December 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1083.898 KB) | DOI: 10.11591/ijpeds.v9.i4.pp1745-1754

Abstract

The conventional three-level inverter has been proposed to act as a recuperating converter in Traction Supply Substation. This converter is mainly used to feed back the regenerative braking energy to the grid. However, passive filter is desired to mitigate the current and voltage harmonics. Therefore, this paper investigates the possibility to use a seven-level Cascaded H-Bridge (CHB) converter as the recuperating converter without additional filtering. The proposed converter is modeled with MATLAB/Simulink simulation software. It is then simulated with two potential modulation schemes, namely Phase-Shifted PWM (PS-PWM) and Phase-Disposition PWM (PD-PWM). The quality of AC waveforms produced by these two modulation methods is compared and studied. The results show that PS-PWM technique is preferable for this application as it offered a clean AC current waveform with less than 5% harmonic distortion. However, a twenty-one-level CHB was predicted to comply with the 8% voltage harmonic requirement.
Co-Authors Awalludin, Nur