Title page for etd-0726110-165847


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URN etd-0726110-165847
Author Yen-ching Wnag
Author's Email Address No Public.
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Department Electrical Engineering
Year 2009
Semester 2
Degree Master
Type of Document
Language English
Title Design of a Hybrid Active Filter to Suppress Harmonic Distortion in Industrial Facilities
Date of Defense 2010-07-05
Page Count 76
Keyword
  • harmonics
  • harmonic resonance
  • hybrid active filter
  • Active filter
  • Abstract Due to the drastic development of semiconductor, nonlinear loads are widely
    used in high-power applications, which results in harmonic distortion of current and
    voltage in the power system. Installation of passive filter is one of the conventional
    solutions to harmonic distortion. But line impedance, load inductors and/or filter
    components may result in harmonic resonance, which amplifies the harmonic
    components, and worsens the harmonic distortion and power quality.
    This thesis proposed a control algorithm of shunt hybrid active filter to suppress
    the harmonics and prevent harmonic resonance in industrial facilities. The hybrid
    active filter is composed of an active filter and a seventh-harmonic frequency tuned
    passive filter. The hybrid active filter functions as damping conductance for harmonic
    frequencies. A dynamical tuning control is realized to adjust the damping conductance
    for maintaining the voltage harmonic distortion. The suppressed harmonic distortion
    is conformed to the harmonics limitation, such as IEEE std. 519-1992. The capacitors
    of the hybrid filter sustain fundamental grid voltage and allow the inverter to operate
    in lower kVA rating. In addition, a dc bus controller was designed to hold the
    capacitor voltage by controlling the fundamental leading current. The simulations and
    laboratory results are provided to verify the effectiveness on suppressing harmonic
    resonance.
    Advisory Committee
  • Jian-Fu Chen - chair
  • Hurng-Liahung Jou - co-chair
  • Yu-Jen Lin - co-chair
  • Yaow-Ming Chen - co-chair
  • Tzhung-Lin Lee - advisor
  • Files
  • etd-0726110-165847.pdf
  • indicate in-campus access in a year and off_campus not accessible
    Date of Submission 2010-07-26

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