Unified power quality conditioner with reduced switch topology for distributed networks

Abstract

A unified power quality conditioner (UPQC) is a combination of shunt and series converter used to mitigate various power quality issues. In this work the shunt and series converters are designed with reduced number of switches. The new UPQC with reduced switches is controlled using SRF based Carrier Double Zero Sequence Signal Modulation (CDZSSM) technique to mitigate the various power quality issues like voltage sag, current ripples and  Total Harmonic Distortion in voltage and current waveforms. This reduced switch UPQC with CDZSSM control inherits all the merits of the conventional UPQC system, but the proposed UPQC system has better utilization of DC link voltage and moreover the voltage stresses across the switches are reduced. The results obtained from simulation and hardware of the reduced switch UPQC are compared and presented.

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Correspondence to T. M. Thamizh Thentral.

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Thamizh Thentral, T.M., Jegatheesan, R. & Vijayakumar, K. Unified power quality conditioner with reduced switch topology for distributed networks. Wireless Netw 27, 909–923 (2021). https://doi.org/10.1007/s11276-019-02189-y

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Keywords

  • Reduced switch UPQC
  • SRF technique
  • Carrier double zero sequence signal modulation (CDZSSM)
  • Voltage sag
  • Total harmonic distortion