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Content Provider | IET Digital Library |
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Author | Langer, Nitin Bhat, Abdul Hamid |
Abstract | In this study, an improved performance three-phase neutral-point clamped bidirectional rectifier with modified control scheme is proposed. The proposed control strategy takes into consideration the amount/degree of deviation of source voltage from desired rated value during supply perturbation and accordingly modifies the reference current template for each phase individually which is termed as compensated reference current. In other words, magnitude, shape and phase of compensated reference current waveform for each phase are different depending on amount of deviation of that phase. A complete mathematical model of rectifier using pulse width modulation technique is developed. The performance of the converter is evaluated in terms of near unity input power factor, low input current total harmonic distortion, reduced ripple factor of the regulated DC output voltage and particularly the neutral-point voltage balance under different load conditions both for rectification and inversion modes of operation. It is shown that the three-level AC to DC converter with the proposed control scheme displays better performance under source voltage perturbations such as voltage sag, swell, unbalance, harmonics, frequency variations as well as phase angle deviations which are regularly encountered in practical environment. |
Starting Page | 165 |
Ending Page | 174 |
Page Count | 10 |
ISSN | 17554535 |
Volume Number | 8 |
e-ISSN | 17554543 |
Issue Number | Issue 2, Feb (2015) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-pel/8/2 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2013.0727 |
Journal | IET Power Electronics |
Publisher Date | 2014-12-19 |
Access Restriction | Open |
Rights Holder | © The Institution of Engineering and Technology |
Subject Keyword | AC-DC Power Converter Compensated Reference Current Waveform Compensation Control of Electric Power System DC Output Voltage Regulation Harmonic Distortion Inversion Mode Load Perturbations Mathematical Model Modified Control Scheme Neutral Point Voltage Balance Phase Angle Deviations Power Electronics Power Factor Power Supply Power Supply Perturbation Pulse Width Modulation PWM Power Converter PWM Rectifier Rectification Mode Reduced Ripple Factor Source Voltage Perturbations Supervisory Circuit Three Phase Neutral Point Clamped Bidirectional Rectifier Three-level AC-DC Converter Performance Evaluation Total Harmonic Distortion Unity Input Power Factor Voltage Control |
Content Type | Text |
Resource Type | Article |
Subject | Electrical and Electronic Engineering |
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