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Power conditioning using dynamic voltage restorers under different voltage sag types.

Ahmed M Saeed1, Shady H E Abdel Aleem2, Ahmed M Ibrahim1

  • 1Electrical Power and Machines Engineering, Cairo University, Giza 12613, Egypt.

Journal of Advanced Research
|February 5, 2016
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Summary
This summary is machine-generated.

Dynamic Voltage Restorers (DVRs) effectively mitigate voltage sags caused by various faults. This study models DVRs in MatLab, demonstrating their capability to correct voltage disturbances while minimizing grid unbalance and distortion.

Keywords:
Dynamic voltage restorersFaultsPower conditionersPower qualityPower system harmonicsUnbalanced conditions

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Area of Science:

  • Electrical Engineering
  • Power Systems

Background:

  • Voltage sags are common power quality issues that can be symmetrical or unsymmetrical.
  • Dynamic Voltage Restorers (DVRs) are widely used for mitigating voltage sags.

Purpose of the Study:

  • To model and evaluate the performance of a Dynamic Voltage Restorer (DVR) for voltage correction.
  • To assess the DVR's robustness under various voltage sag conditions.

Main Methods:

  • Modeling of DVR using MatLab/Simulink.
  • Simulation of different voltage sag types introduced by short-circuit faults.
  • Evaluation using voltage sag indices, voltage/current unbalance, and total harmonic distortion (THD).

Main Results:

  • The DVR effectively corrected voltage sags across different fault types.
  • The device maintained load voltage THD within specified limits.
  • Grid voltage unbalance and distortion were minimized by the DVR.

Conclusions:

  • DVRs are a robust solution for voltage sag mitigation.
  • The proposed MatLab model accurately represents DVR performance.
  • DVRs ensure power quality by correcting voltage disturbances and minimizing unbalance/distortion.