Thermal stress balance predictive control method and system suitable for multi-level converter
A predictive control and thermal stress technology, applied in the direction of irreversible DC power input conversion to AC power output, can solve problems such as incompatibility, difficulty in applying converters, uneven thermal stress, etc., to increase reliability and service life, Simplify the difficulty of heat dissipation design and ensure the effect of output accuracy
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[0051] The technical solutions in the present invention are clearly and completely described below in combination with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0052] like figure 1 As shown, a thermal stress balance predictive control method suitable for multilevel converters provided by the present invention includes the following steps:
[0053] 1. Collect the instantaneous output value x of the jth control variable of the multilevel converter at time k j (k), according to the mathematical model of the multilevel converter, by x j (k) Obtain the predicted output value of the jth control variable under different switch state comb...
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