In this paper, an uncertainty and disturbance estimator (UDE)-based robust control strategy is developed for AC/DC converters to achieve accurate DC-link voltage regulation. The models of both DC-link voltage dynamics and power delivering are derived firstly. The UDE strategy is introduced into both voltage-loop design and power-loop design to handle the uncertainties (e.g., the effects of model/parametric uncertainties), and external disturbances (e.g., variations of both amplitude and frequency in the grid, or load change). The proposed control strategy simplifies the parameter tuning and algorithm implementation, and offers a very robust disturbance rejection capability without additional synchronization units. Simulation results are provided to show the effectiveness of the proposed strategy.
|Title of host publication
|Subtitle of host publication
|IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society
|Institute of Electrical and Electronics Engineers Inc.
|Number of pages
|Published - Dec 26 2018
|44th Annual Conference of the IEEE Industrial Electronics Society, IECON 2018 - Washington, United States
Duration: Oct 20 2018 → Oct 23 2018
|Proceedings: IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society
|44th Annual Conference of the IEEE Industrial Electronics Society, IECON 2018
|10/20/18 → 10/23/18
- AC/DC converter
- DC-link voltage regulation
- Robust control
- Uncertainty and disturbance estimator (UDE)