Wide Damping Region for LCL-Type Grid-Connected Inverter with an Improved Capacitor-Current-Feedback Method || 2015-2016 IEEE Power electronics Projects Training

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Wide Damping Region for LCL-Type Grid-Connected
Inverter with an Improved Capacitor-Current-Feedba
ck Method

• Presented by
• IIS TECHNOLOGIES
• No 40, C-Block,First Floor,HIET Campus, North
  Parade Road,St.Thomas Mount, Chennai, Tamil Nadu
  600016.
• Landline044 4263 7391,mob9952077540.
• Emailinfo_at_iistechnologies.in,
• Webwww.iistechnologies.in

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ABSTRACT

• This project has presented a stability analysis
  of a LCL type grid-connected inverter in the
  discrete-time domain.
• It has been found that even though the system is
  stable when the resonance frequency fr is higher
  than one-sixth of the sampling frequency (fs/6),
  an effective damping scheme is still required due
  to the potential influence of the grid impedance.
  
• With a conventional proportional
  capacitor-current-feedback active damping (AD),
  the valid damping region is only up to fs/6.
• This however is not sufficient in the design
  process for obtaining a high quality output
  current and the system can easily become unstable
  due to the resonance frequency shifting.
• Considering the resonance frequency design rules
  of the LCL filter, this project proposes an
  improved capacitor-current-feedback AD method.

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CIRCUIT DIAGRAM
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TOOLS AND SOFTWARE USED

• MP LAB
• ORCAD/PSPICE
• MATLAB/SIMULINK

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OUTPUT

• HARDWARE
• SIMULATION

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Contact

• IIS TECHNOLOGIES
• No 40, C-Block,First Floor,HIET Campus, North
  Parade Road,St.Thomas Mount, Chennai, Tamil Nadu
  600016.
• Landline044 4263 7391,mob9952077540.
• Emailinfo_at_iistechnologies.in,
• Webwww.iistechnologies.in