Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Voltage compensation using sequence component detection technique under sag, swell, and distorted conditions of grid voltages

  • Al‑Gahtani, Saad F. (Department of Electrical Engineering, College of Engineering, King Khalid University)
  • Received : 2021.07.02
  • Accepted : 2021.12.02
  • Published : 2022.03.20
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Abstract

The use of certain electrical equipment connected to conventional power systems has raised concerns regarding the quality of the power system. Some equipment has been perceived to be unequipped to sustain the surges, faults, and distortions in traditional distribution systems. Common voltage issues exist, such as imbalance, harmonic distortion, sag, and swell. Such issues are usually contained using a dynamic voltage restorer (DVR). In this study, the determination of voltage references for DVR based on a robust and simple detection method of positive and negative sequence components is analyzed. This method detects the components in real time. With the proposed method, either the reference load voltages can be generated, or the reference DVR voltages can be generated, depending on which voltages are controlled. Moreover, contrary to other methods, the proposed technique avoids the use of phase-locked loop (PLL) and vector transformation. The voltage compensation technique controls the DVR in real time to prevent steady-state and disturbance conditions at the load side. The proposed system is evaluated by simulation and experimentation under several steady-state and transient cases. Finally, the proposed control is compared with common control methods.

Keywords

Acknowledgement

The author would like to thank the Deanship of Scientifc Research at King Khalid University for funding this work under Grant No. RGP.1/255/42.

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