MODEL PREDICTIVE CONTROL WITH REFERENCE TRACKING
First Claim
1. A method for controlling an electrical converter, the electrical converter including a plurality of semiconductor switches, wherein the electrical converter is configured for generating a two-level or multi-level output voltage from an input voltage by switching the plurality of semiconductor switches, the method comprising:
- receiving a reference electrical quantity (iS*) and an actual electrical quantity (iS);
determining a sequence of future electrical quantities of the electrical converter from the actual electrical quantity;
determining a maximal cost value based on the sequence of future electrical quantities;
iteratively determining an optimal switching sequence for the electrical converter, wherein a switching sequence includes a sequence of future switching states for the semiconductor switches of the electrical converter; and
selecting the first switching state of the optimal switching sequence as a next switching state (u) to be applied to the semiconductor switches of the electrical converter,wherein the optimal switching sequence is iteratively determined by;
extending a switching sequence by appending a possible switching state to the switching sequence;
determining a cost value for the extended switching sequence with a cost function based on the sequence of future electrical quantities; and
discarding the extended switching sequence, when the cost value is higher than the maximal cost value.
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Accused Products
Abstract
An exemplary electrical converter includes a plurality of semiconductor switches. The electrical converter is configured for generating a two-level or multi-level output voltage from an input voltage by switching the plurality of semiconductor switches. A method for controlling the electrical converter includes receiving a reference electrical quantity (iS*) and an actual electrical quantity (iS), determining a sequence of future electrical quantities of the electrical converter from the actual electrical quantity, determining a maximal cost value based on the sequence of future electrical quantities, and iteratively determining an optimal switching sequence for the electrical converter. A switching sequence includes a sequence of future switching states for the semiconductor switches of the electrical converter. The method also includes selecting the first switching state of the optimal switching sequence as the next switching state (u) to be applied to the semiconductor switches of the electrical converter.
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Citations
14 Claims
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1. A method for controlling an electrical converter, the electrical converter including a plurality of semiconductor switches, wherein the electrical converter is configured for generating a two-level or multi-level output voltage from an input voltage by switching the plurality of semiconductor switches, the method comprising:
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receiving a reference electrical quantity (iS*) and an actual electrical quantity (iS); determining a sequence of future electrical quantities of the electrical converter from the actual electrical quantity; determining a maximal cost value based on the sequence of future electrical quantities; iteratively determining an optimal switching sequence for the electrical converter, wherein a switching sequence includes a sequence of future switching states for the semiconductor switches of the electrical converter; and selecting the first switching state of the optimal switching sequence as a next switching state (u) to be applied to the semiconductor switches of the electrical converter, wherein the optimal switching sequence is iteratively determined by; extending a switching sequence by appending a possible switching state to the switching sequence; determining a cost value for the extended switching sequence with a cost function based on the sequence of future electrical quantities; and discarding the extended switching sequence, when the cost value is higher than the maximal cost value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification