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Fault Detection and Mitigation in Multilevel Converter STATCOMs

    Fault Detection and Mitigation in Multilevel
    Converter STATCOMs
    Atousa Yazdani, Member, IEEE, Hossein Sepahvand, Student Member, IEEE,
    Mariesa L. Crow, Fellow, IEEE, and Mehdi Ferdowsi, Member, IEEE
    Abstract—Manystatic synchronous compensators (STATCOMs)
    utilize multilevel converters due to the following: 1) lower harmonic
    injection into the power system; 2) decreased stress on the
    electronic components due to decreased voltages; and 3) lower
    switching losses. One disadvantage, however, is the increased likelihood
    of a switch failure due to the increased number of switches
    in a multilevel converter. A single switch failure, however, does not
    necessarily force an (2n + 1)-level STATCOM offline. Even with
    a reduced number of switches, a STATCOM can still provide a
    significant range of control by removing the module of the faulted
    switch and continuing with (2n − 1) levels. This paper introduces
    an approach to detect the existence of the faulted switch, identify
    which switch is faulty, and reconfigure the STATCOM. This approach
    is illustrated on an eleven-level STATCOM and the effect
    on the dynamic performance and the total harmonic distortion
    (THD) is analyzed.
    Index Terms—Fault detection, multilevel converter, static
    synchronous compensator (STATCOM).


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    منبع
    برچسب ها : statcom ,switch ,multilevel ,ieee ,member ,level statcom ,multilevel converter ,switch failure ,member ieee ,
    Fault Detection and Mitigation in Multilevel Converter STATCOMs

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