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Abstract
The neutral-point potential fluctuation in single-phase three-level rectifiers leads to coupling between the line current regulation and dc-link capacitor voltage balancing, deteriorating waveform quality of the line current. For addressing this issue, this paper proposes a low-complexity model predictive current control (MPCC) with constant switching frequency, which achieves a decoupling control of the line current and the neutral-point potential under the unbalanced load condition. The switching frequency is fixed by combining the MPCC scheme with predefined switching sequences. The boundary of the durations for voltage vectors in switching sequences is presented to balance the capacitor voltage without worsening the line current quality. The optimal switching sequence and the corresponding optimal durations of voltage vectors in the switching sequence are readily derived without the assessment of the cost function, which dramatically simplifies the complexity of the MPCC scheme. Finally, simulations and experimental results are conducted to verify the effectiveness of the proposed MPCC scheme.
Original language | English |
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Journal | I E E E Transactions on Power Electronics |
Volume | 33 |
Issue number | 10 |
Pages (from-to) | 8936 - 8947 |
Number of pages | 12 |
ISSN | 0885-8993 |
DOIs | |
Publication status | Published - Oct 2018 |
Keywords
- Model predictive current control (MPCC)
- Neutral-point voltage balancing
- Single-phase three-level rectifiers
- Unbalanced load
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Dive into the research topics of 'Low-Complexity Model Predictive Control of Single-Phase Three-Level Rectifiers with Unbalanced Load'. Together they form a unique fingerprint.Projects
- 1 Finished
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HARMONY: HARMONY - Harmonic identification, mitigation and control in power electronics based power systems
Blaabjerg, F., Bak, C. L., Wang, X., Beres, R. N., Kwon, J., Gui, Y., Yoon, C. & Ebrahimzadeh, E.
01/02/2013 → 28/02/2018
Project: Research