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Optimal Switching-Sequence-Based Model Predictive Control for a Hybrid Multilevel STATCOM
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DOI：10.1109/TIE.2022.3146592.png)
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摘要
En 中文
In this article, we introduce a model predictive control with optimal switching sequence (OSS-MPC) for a multilevel static synchronous compensator (STATCOM). The studied STATCOM is based on a hybrid multilevel inverter named HC-FNPC formed by the cascaded connection of H-bridge cells with a full-bridge neutral point clamped cell (FNPC). In this article, the optimal switching sequences are derived for HC-FNPC STATCOM by considering the impact of each switching sequence on the voltage of capacitors. Then, the control objectives of hybrid multilevel STATCOM, i.e., ac current control and capacitors' voltages balancing, are formulated in terms of OSS-MPC for the first time. In contrast to the conventional MPC, this method provides a fixed-switching frequency. Also, by a combination of optimal switching sequences in MPC, the regulation of capacitors' voltages with unequal values is realized. The control system's performance is verified on a nine-level (9L) 2.4 Mvar/11 kV HC-FNPC STATCOM in MATLAB/Simulink. Also, the experimental results are provided on a 9L 1.25 kvar/220 V scaled-down hardware prototype.
Keyword:
Automatic voltage control
Switches
Capacitors
Control systems
Switching frequency
Topology
Switching circuits
Hybrid multilevel converter
model predictive control (MPC)
static synchronous compensator (STATCOM)
期刊
IF:
7.2
论文数:
1.8W
被引数:
9.8W
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