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Linearized DC-MMC Models for Control Design Accounting for Multifrequency Power Transfer Mechanisms.
- Source :
-
IEEE Transactions on Power Delivery . Feb2018, Vol. 33 Issue 1, p271-281. 11p. - Publication Year :
- 2018
-
Abstract
- The dc-modular multilevel converter (DC-MMC) is one of a new class of single-stage modular multilevel dc–dc converters that has recently emerged for high-voltage dc applications. This paper presents the first small-signal state-space model for the DC-MMC that is able to account for the multifrequency power transfer mechanisms within the converter. Derived from a dynamic phasor model representation of the DC-MMC, the developed model is linear time-invariant (LTI), allowing for the application of conventional LTI tools for both analysis and design. The small-signal dynamics are validated by simulation results from a full switched model demonstrating its accuracy. A simplified model derived from the full LTI system is presented that readers can utilize to develop dynamic controls for the DC-MMC. As a case study, this benchmark model is leveraged to propose a dynamic controller that regulates dc power transfer between networks and balances the capacitor voltages. Control block diagrams are also provided that enable systematic control design of the DC-MMC via standard linear methods. Case study simulations verify the efficacy of the developed controls for dc network applications. The presented small-signal modeling and control design methodology can be readily applied to any MMC-based topology. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 08858977
- Volume :
- 33
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Power Delivery
- Publication Type :
- Academic Journal
- Accession number :
- 127499485
- Full Text :
- https://doi.org/10.1109/TPWRD.2017.2705525