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Modular multilevel converter modulation using fundamental switching selective harmonic elimination method.

Nampally, Ashok; Sinha, Yashwant

Authors

Ashok Nampally

Yashwant Sinha

Abstract

This paper address the issue of low order harmonics in a modular multilevel converter (MMC). Using fundamental switching selective harmonic elimination (SHE), the control angles are calculated from nonlinear equations by Newton-Raphson method. The selective harmonic elimination equations are solved in such a way that the first switching angle is used to control the magnitude of the fundamental voltage and the remaining angles are used to eliminate the lowest odd, non-triplen harmonics components as they dominate the total harmonic distortion of the converter. The concept is validated using a 9-level detailed model of MMC in PSCAD/EMTDC{reg}. The simulation result shows a good agreement with theoretical analysis and in comparison with conventional sinusoidal pulse width modulation (SPWM), the proposed method, eliminates low order harmonics, leading to a low total harmonic distortion.

Start Date Nov 20, 2016
Publication Date Mar 23, 2017
Publisher Institute of Electrical and Electronics Engineers
Pages 736-741
Institution Citation NAMPALLY, A. and SINHA, Y. 2016. Modular multilevel converter modulation using fundamental switching selective harmonic elimination method. 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 736-741. Available from: https://doi.org/10.1109/ICRERA.2016.7884431.
DOI https://doi.org/10.1109/ICRERA.2016.7884431
Keywords Modular multilevel converter; Pulse width modulation; Selective harmonic elimination; NewtonRaphson method

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