English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

This paper presents the harmonic state space (HSS) modeling of a three-phasemodular multilevel converter (MMC). MMC is a converter system with a typicalmulti-frequency response due to its significant harmonics in the arm currents,capacitor voltages, and control signals. These internal harmonic dynamics canhave a great influence on the operation characteristics of MMC. However, theconventional modeling methods commonly used in two-level voltage-sourceconverters (VSCs), where only the fundamental-frequency dynamic is considered,will lead to an inaccurate model that cannot accurately reflect the realdynamic characteristics of MMC. Therefore, the HSS modeling method, in whichharmonics of state variables, inputs, and outputs are posed separately in astate-space form, is introduced in this paper to model the MMC in order tocapture all the harmonics and the frequency couplings. The steady-state andsmall-signal dynamic HSS models of a three-phase MMC are developed,respectively. The validity of the developed HSS model of a three-phase MMC hasbeen verified by the results from both the nonlinear time domain simulationmodel in MATLAB/Simulink and the laboratory prototype with 12 submodules perarm.

Harmonic State Space Modeling of a Three-Phase Modular Multilevel Converter