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Active Front-End converter applied for the THD reduction in power systems

Salgado-Herrera, N.M. and Anaya-Lara, O. and Campos-Gaona, D. and Medina-Rios, A. and Tapia-Sanchez, R. and Rodriguez-Rodriguez, J.R. (2018) Active Front-End converter applied for the THD reduction in power systems. In: 2018 IEEE Power & Energy Society General Meeting (PESGM). IEEE, Piscataway, NJ. ISBN 9781538677032

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The Active Front-End (AFE) converter topology is generated by modifying a conventional back-to-back converter, from using a single VSC to use pVCS connected in parallel. The AFE configuration improves the capability, efficiency and reliability of energy conversion devices connected to the power system. In this paper, a novel technique to reduce the total harmonic distortion (THD) in an AFE converter topology is proposed and analyzed. The THD reduction is achieved by applying a phase shift angle in the SPWM switching signals of each AFE converter VSC. To verify the functionality and robustness of the proposed methodology, the power system simulation in Matlab-Simulink is analyzed for a type-4 wind turbine converter with total power output of 9MW. The obtained simulation results show a THD reduction up to 2.5 for AFE connected to the power network.