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Linearized DQ averaged model of modular multilevel converter.

Nampally, Ashok; Sinha, Yashwant

Authors

Ashok Nampally

Yashwant Sinha

Abstract

This paper proposes a linearized model of Modular Multilevel Converter (MMC) in DQ frame. The proposed MMC model has a modularstructure and can be linked with other power elements such as AC and DC subsystems.The main challenge of developing DQ model of MMC is to deal with the multiplication terms in dynamic equations of MMC. In this paper, the multiplication terms are done in ABC frame and results are transferred to DQ frame after ignoring the higher harmonics. The detailed model is implemented in PSCAD/EMTDC and the proposed linearized model is implemented in Matlab in a modular form. The results of the two models show very good matching which in turn confirm the accuracy of the proposed model. Therefore, thismodelpermits modern control designtechniques to be employedon MMC,including eigenvalues studies and frequency domain analysis.

Start Date Nov 20, 2016
Publication Date Mar 23, 2017
Publisher Institute of Electrical and Electronics Engineers
Pages 861-866
Institution Citation NAMPALLY, A. and SINHA, Y. 2016. Linearized DQ averaged model of modular multilevel converter. In Proceedings of the 5th Institute of Electrical and Electronics Engineers (IEEE) International conference on renewable energy research and applications (ICRERA 2016), 20-23 November 2016, Birmingham, UK. Piscataway: IEEE [online], pages 861-866. Available from: https://doi.org/10.1109/ICRERA.2016.7884458.
DOI https://doi.org/10.1109/ICRERA.2016.7884458
Keywords Modular; Multilevel converter; Modelling; Averaged model; Small signal model

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