ISSN 1000-1026
CN 32-1180/TP
  • ISSN 1000-1026
  • CN 32-1180/TP

Citation: gaoshang,李周,李玲玉,何国庆,李光辉.Impedance Analysis and Sub/Super-synchronous Oscillation Suppression of Modular Multilevel Medium Voltage Converter[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20180515005 copy

Impedance Analysis and Sub/Super-synchronous Oscillation Suppression of Modular Multilevel Medium Voltage Converter

  • Received Date: May 15, 2018
    Accepted Date: November 14, 2018
    Available Online: 2019-01-18

  • Abstract:

        Modular multilevel converter is widely in the medium and high voltage power grid. For the potential subsynchronous/supersynchronous oscillation problem in PV medium voltage DC power collection and integration system, this paper systematically establishes the positive- and negative-sequence impedance models of MMC converter, which provide the basis of the stability analysis for grid-connected MMC inverters. Combined with the impedance analysis theory, two simulation cases in time and frequency domains predict subsynchronous/supersynchronous oscillation with different control parameters. Simulation results show that subsynchronous/supersynchronous oscillation can be effectively suppressed with the optimization of control parameters in high series-capacitor compensation working condition.


  • Keywords:

    modular multilevel; electromagnetic transient simulation; positive and negative impedance; frequency domain; subsynchronous/supersynchronous oscillation


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