Bifurcation analysis of five-level cascaded H-bridge inverter using proportional-resonant plus time-delayed feedback

Jinke Zhang, Xiaojie Wu, Lvshuai Xing, Chao Zhang, Herbert Iu, Tyrone Fernando

    Research output: Contribution to journalArticle

    17 Citations (Scopus)

    Abstract

    In this paper, a traditional five-level cascaded H-bridge inverter is studied and regulated by a proportional-resonant (PR) controller. In order to extend the range of the gain of PR controller, for the purpose of achieving a fast response, a time-delayed feedback controller (TDFC) is used. Similar to the pulse width modulation (PWM) current-mode single phase H-bridge inverter that exhibits bifurcation and chaos when parameters vary, we demonstrate for the first time that the cascaded H-bridge inverter also shows similar features. From the perspective of a discontinuous map, the cascaded H-bridge inverter generally displays extraordinary complexity. Moreover, a new virtual ergodic method (VEM) is proposed to establish the mathematical model of the whole system, which helps to understand the observed bifurcation phenomena. Simulation results are given to verify the analysis.

    Original languageEnglish
    Article number1630031
    JournalInternational Journal of Bifurcation and Chaos
    Volume26
    Issue number11
    DOIs
    Publication statusPublished - 1 Oct 2016

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