Performance recovery output voltage control algorithm for AC/DC converter |
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Authors: | Seok-Kyoon Kim |
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Affiliation: | Department of Creative Convergence Engineering, Hanbat National University , 125, Dongseo-daero, Yuseong-gu, Daejeon, Korea |
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Abstract: | This article proposes a proportional-type cascade output voltage control algorithm equipped with disturbance observers for a three-phase AC/DC converter considering a model-plant mismatch. The advantages of the proposed method are grouped into two. First, a simple first-order disturbance observer is devised for both inner and outer-loops, not only to recover the target closed-loop performance, but also to eliminate steady-state offset errors. Second, it is thoroughly verified that the entire closed-loop system driven by the proposed proportional-type cascade controller is stable. The efficacy of the proposed method is experimentally investigated using a 3 ? kW AC/DC converter. |
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Keywords: | AC/DC converter performance recovery offset-free property disturbance observer |
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