Abstract
Traditional model predictive control cost functions, when utilizing long prediction horizons ( $N\geq 10$) in power inverter applications, have demonstrated harmonic performances approaching that of schemes based on offline-generated optimal pulse patterns. However, long prediction horizons often prohibitively increase computational load. A different approach to maximizing harmonic performance is taken in this paper. It is shown that shaping the output voltage spectra using a simple feedback mechanism can significantly reduce the length of the required prediction horizon, facilitating a feasible computational load. When a short-horizon cost function is augmented by the feedback mechanism an excellent tradeoff between harmonic performance and switching loss is achieved, even with a prediction horizon of one. It is also shown that the feedback mechanism can be used to improve input reference tracking. Experimental verification of the proposed modulator is performed on a two-level three-phase inverter.
Original language | English |
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Article number | 8030145 |
Pages (from-to) | 2945-2955 |
Number of pages | 11 |
Journal | IEEE Transactions on Industrial Electronics |
Volume | 65 |
Issue number | 4 |
DOIs | |
Publication status | Published - 1 Apr 2018 |
Externally published | Yes |