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Predictive Control of a Modular Multilevel Converter for a Back-to-Back HVDC System

Jiangchao Qin, Saeedifard, M.·2012·IEEE Transactions on Power Delivery

Abstract

The modular multilevel converter (MMC) is one of the most potential converter topologies for high-power/voltage systems, specifically for high-voltage direct current (HVDC). One of the main technical challenges of an MMC is to eliminate/minimize the circulating currents of converter arms while the capacitor voltages are maintained balanced. This paper proposes a model predictive control (MPC) strategy that takes the advantage of a cost function minimization technique to eliminate the circulating currents and carry out the voltage balancing task of an MMC-based back-to-back HVDC system. A discrete-time mathematical model of the system is derived and a predictive model corresponding to the discrete-time model is developed. The predictive model is used to select the best switching states of each MMC unit based on evaluation and minimization a defined cost function associated with the control objectives of MMC units and the overall HVDC system. The proposed predictive control strategy: 1) enables control of real and reactive power of the HVDC system; 2) achieves capacitor voltage balancing of the MMC units; and 3) mitigates the circulating currents of the MMC units. Performance of the proposed MPC-based strategy for a five-level back-to-back MMC-HVDC is evaluated based on time-domain simulation studies in the PSCAD/EMTDC software environment. The reported study results demonstrate a satisfactory response of the MMC-HVDC station operating based on the proposed MPC strategy, under various conditions.

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Metadata

Authors
Qin, J., & Saeedifard, M.
Venue
IEEE Transactions on Power Delivery
Published
2012-07
Volume
27
Issue
3
Pages
1538-1547
ISSN
  • 0885-8977 (ISSN-L)
  • 1937-4208
OpenAlex
W2116770400
Cited by
428
References
29
FWCI
21.57
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Predictive Control of a Modular Multilevel Converter for a Back-to-Back HVDC System. https://app.cochat.ai/papers/10.1109/tpwrd.2012.2191577
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Qin, J., & Saeedifard, M. (2012). Predictive Control of a Modular Multilevel Converter for a Back-to-Back HVDC System. IEEE Transactions on Power Delivery. https://doi.org/10.1109/tpwrd.2012.2191577

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