Title page for etd-0825111-012553


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URN etd-0825111-012553
Author Chun-Yi Kuo
Author's Email Address No Public.
Statistics This thesis had been viewed 5560 times. Download 1247 times.
Department Electrical Engineering
Year 2010
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Design of A Droop-Controlled Inverter with Seamlessly Grid-Connected Transition
Date of Defense 2011-07-29
Page Count 109
Keyword
  • seamless transition
  • phase-locked loop
  • virtual inductance
  • droop-controlled
  • zero-current control
  • Abstract The grid voltage is normally required to avoid transient current of the inverter due to asynchronously grid-paralleling connection. This paper presents a seamless transition method to allow the inverter to connect to the grid at any time with no requirement of the grid voltage. The control of the inverter consists of the droop control and the riding-through control. In the droop-controlled mode, the inverter can connect to the utility and supply power according to its rated capacity. On the other hand, the riding-through mode is proposed to suppress the transient current due to asynchronous paralleling. In this mode, the zero-current control is realized to reduce transient current and a phase-locked loop is designed to correct the angle of the inverter output voltage. In addition, the virtual inductance is implemented to improve transient current resulting from the mode transition back to the droop control mode. Design considerations of the seamless transition method are provided and test results are conducted to verify its effectiveness.
    Advisory Committee
  • Shir-Kuan Lin - chair
  • CHENG-TSUNG LIU - co-chair
  • Jinn-Chang Wu - co-chair
  • Jen-Hao Teng - co-chair
  • Tzung-Lin Lee - advisor
  • Files
  • etd-0825111-012553.pdf
  • Indicate in-campus at 1 year and off-campus access at 1 year.
    Date of Submission 2011-08-25

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