Coordinated Optimization of Capacitor Voltage Ripple and Current Stress Minimization for Modular Multilevel Converter

Ang Li, Lei Lin, Chen Xu, Shirong Yang

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

2 Citations (Scopus)

Abstract

For an optimal performance of a modular multilevel converter (MMC), a tradeoff between multiple objectives can be complex. The injection of zero sequence voltage and circulating current can enlarge modulation index and to diminish the submodule capacitor voltage fluctuation. In this paper, a multi-objective genetic optimization algorithm is proposed to improve the performance of MMC in minimizing both the capacitor voltage ripple and current stress. The amplitude and phases of the circulating current and zero sequence voltage are designed in optimal coordination. Simulation in MATLAB/Simulink is implemented to validate the effectiveness and feasibility of the proposed method.

Original languageEnglish
Title of host publication2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC)
PublisherInstitute of Electrical and Electronics Engineers
Number of pages6
ISBN (Electronic)978-1-5386-6054-6
DOIs
Publication statusPublished - 27 Dec 2018
Externally publishedYes

Keywords

  • Modular multilevel converters
  • circulating current injection
  • optimization
  • zero sequence voltage injection

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