Estimation methods and sensor reduction in modular multilevel converters: A review
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2018-07-02
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Institute of Electrical and Electronics Engineers Inc.
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Abstract
The circuit configuration of the modular multilevel converter (MMC) requires a large number of current and voltage measurements as well as communications within the converter arms and between the arm controllers and the main control circuit. In order to reduce circuit complexity and hardware requirements with their associated cost, while adding an additional level of reliability to the operation of the MMC, a number of methods have been proposed for the estimation / observation of the various internal electrical variables or parameters of the MMC. These include estimations for sub-module capacitor voltages, dc-link voltages, arm currents or total arm energy. Such methods aim to eliminate or reduce the sensors in the circuit, reduce communication requirements or both. This paper provides an overview and classification of the different estimation/observation methods for MMCs currently proposed in the literature.
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Publisher Copyright: © 2018 IEEE.
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Konstantinou , G , Wickramasinghe , H R , Townsend , C D , Ceballos , S & Pou , J 2018 , Estimation methods and sensor reduction in modular multilevel converters : A review . in 2018 8th International Conference on Power and Energy Systems, ICPES 2018 . , 8626987 , 2018 8th International Conference on Power and Energy Systems, ICPES 2018 , Institute of Electrical and Electronics Engineers Inc. , pp. 23-28 , 8th International Conference on Power and Energy Systems, ICPES 2018 , Colombo , Sri Lanka , 21/12/18 . https://doi.org/10.1109/ICPESYS.2018.8626987
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