Cover
Vol. 17 No. 2 (2021)

Published: December 31, 2021

Pages: 140-150

Original Article

Voltage Sag, Voltage Swell and Harmonics Reduction Using Unified Power Quality Conditioner (UPQC) Under Nonlinear Loads

Ahmed Yahyia Qasim 1 Fadhil Rahma Tahir Ahmed Nasser B. Alsammak 2
1Electrical Engineering Department, University of Basrah, Basrah, Iraq
2Electrical Engineering Department, University of Mosul, Mosul, Iraq.
History
  • Received: August 14, 2021
  • Revised: September 16, 2021
  • Accepted: September 18, 2021
  • Available Online: September 18, 2021
DOI

https://doi.org/10.37917/ijeee.17.2.16

Abstract

In light of the widespread usage of power electronics devices, power quality (PQ) has become an increasingly essential factor. Due to nonlinear characteristics, the power electronic devices produce harmonics and consume lag current from the utility. The UPQC is a device that compensates for harmonics and reactive power while also reducing problems related to voltage and current. In this work, a three-phase, three-wire UPQC is suggested to reduce voltage-sag, voltage-swell, voltage and current harmonics. The UPQC is composed of shunt and series Active Power Filters (APFs) that are controlled utilizing the Unit Vector Template Generation (UVTG) technique. Under nonlinear loads, the suggested UPQC system can be improved PQ at the point of common coupling (PCC) in power distribution networks. The simulation results show that UPQC reduces the effect of supply voltage changes and harmonic currents on the power line under nonlinear loads, where the Total Harmonic Distortion (THD) of load voltages and source currents obtained are less than 5%, according to the IEEE-519 standard.

Keywords

References

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