Equivalence of the Integrator-Based and Disturbance-Observer-Based State-Space Current Controllers for Grid Converters
| Autor: | Jarno Kukkola, Diego Perez-Estevez, F. M. Mahafugur Rahman, Marko Hinkkanen, Jesus Doval-Gandoy, Ville Pirsto |
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| Přispěvatelé: | Electric Drives, Department of Electrical Engineering and Automation, University of Vigo, Aalto-yliopisto, Aalto University |
| Rok vydání: | 2021 |
| Předmět: |
Steady state
Computer science Automatic frequency control Feed forward Integrator Converters Disturbance observer Grid Transfer function Control and Systems Engineering Control theory Double-frequency controller Grid converter Electrical and Electronic Engineering Equivalence (measure theory) State-space current control |
| Zdroj: | IEEE Transactions on Industrial Electronics. 68:4966-4976 |
| ISSN: | 1557-9948 0278-0046 |
| DOI: | 10.1109/tie.2020.2988194 |
| Popis: | Avataan tiedosto kun julkaistu IEEE Xploressa / Marja M. This article deals with discrete-time state-space current controllers for three-phase grid converters equipped with an LCL filter. The integral action in the controller can be implemented either using an integrator or a disturbance observer. The results show that the disturbance-observer-based and integrator-based controllers become mathematically equal if the feedforward gains are selected to be equal, the feedforward zero is placed to cancel the pole originating from the integral action, and the closed-loop poles are placed identically. The equivalent performance in both designs is verified by means of analyses and experiments. The equivalence is also shown for double-frequency current controllers. |
| Databáze: | OpenAIRE |
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