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Disturbance observer based multiloop proportional feedback system for output voltage regulation in three phase AC to
Hosik Lee1, Dongpin Kim2, Hyun Chang Park1
1Green Mobility Team, Tenergy, 13453, Seongnam, Korea.
None:
This paper suggests a disturbance observer (DOB)-based offset-free output voltage regulator for the three-phase AC/DC power converters, taking the nonlinearity, parameter, and load uncertainties into account. The proposed multiloop controller is designed in such a way that it feeds back only proportional errors and stabilizes the output voltage and current tracking errors involving the feed-forward compensation terms driven by the DOBs. The DOBs assist the inner and outer loop controllers to ensure the performance recovery and steady-state error rejection properties, which correspond to a major contribution of this article. A three-phase 3-kW AC/DC power converter is used for experimentally verifying the efficacy of the proposed technique.
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