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

Nampally, Ashok; Sinha, Yashwant

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®. 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.

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.

• Conference Name: 5th Institute of Electrical and Electronics Engineers (IEEE) International conference on renewable energy research and applications (ICRERA 2016)
• Conference Location: Birmingham, UK
• Start Date: Nov 20, 2016
• End Date: Nov 23, 2016
• Acceptance Date: Oct 1, 2016
• Online Publication Date: Nov 20, 2016
• Publication Date: Mar 23, 2017
• Deposit Date: Apr 24, 2017
• Publicly Available Date: Apr 24, 2017
• Publisher: IEEE Institute of Electrical and Electronics Engineers
• Pages: 736-741
• DOI: https://doi.org/10.1109/ICRERA.2016.7884431
• Keywords: Modular multilevel converter; Pulse width modulation; Selective harmonic elimination; NewtonRaphson method
• Public URL: http://hdl.handle.net/10059/2281