Optimal control method and system of dc link current ripple in sector-based three-phase current source rectifier

Abstract

The application belongs to the technical field of rectifiers, and proposes a sector division-based optimization control method and system for DC link current ripple in a three-phase current source rectifier, the main scheme of which is as follows: firstly, a dual-variable operating region judgment mechanism based on modulation index and sector angle is used to identify the operating region of the current three-phase current source rectifier; secondly, a corresponding modulation strategy is selected based on the operating region of the current three-phase current source rectifier, so that each modulation strategy operates in its optimal interval; finally, according to the selected modulation strategy, the action time of each reference vector is integrated to finally generate a drive signal sequence of the three-phase current source rectifier. The application can ensure the power quality output by the three-phase current source rectifier.

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