1 Citation (Scopus)

Abstract

This paper proposes a dual UPQC system model supplied by two PV arrays and then called the 2UPQC-2PV system to enhance load real power flow performance in a 380 V (L-L) low-voltage 3P3W distribution system with a frequency of 50 Hz. The 2UPQC-2PV configuration is used to maintain the load voltage and enhance the real load power performance in the event of an interruption voltage disturbance on the source bus. The performance of the 2UPQC-2PV configuration is further validated with the 2UPQC and 2UPQC-1PV configurations. The simulation of disturbance in each model configuration consists of six operating modes (OMs) i.e. OM 1 (Sinusoidal-Swell-Non Linear Load or S-Swell-NLL), OM2 (S-Sag-NLL), OM 3 (S-Interruption-NLL or S-Inter-NLL), OM4 (Distorted-Swell-NLL or D-SNLL), OM5 (D-Sag-NLL), and OM 6 (D-Inter-NLL). The Dual-Fuzzy-Sugeno (Dual-FS) control method is used to overcome the weaknesses of the dual-proportional-integral (Dual-PI) control in determining the optimum parameters of proportional and integral constants. In OM 3 and OM 6, the 2UPQC-2PV configuration with Dual-PI and Dual-FS controls is able to maintain a higher load voltage than the 2UPQC and 2UPQC-1PV configurations. In OM 6, the 2UPQC configuration with the dual PI and dual FS methods is able to produce the lowest average (Total Harmonic Distortion (THD) of load voltage compared to the 2UPQC-1PV and 2UPQC-2PV. In OM 3 and OM 6, the 2UPQC-2PV configuration with Dual-PI and Dual-FS controls is capable of producing higher real load power, compared to the 2UPQC and 2UPQC-1PV configurations. In OM 3 and OM 6, the 2UPQC-2PV configuration with the Dual-FS method is able to produce higher load real power, compared to the Dual-PI method. Furthermore, in OM 3 and OM 6, the 2UPQC-2PV configuration with the Dual-FS method is also able to produce higher dual-UPQC efficiency, compared to the Dual-PI method. In the case of interruption voltage disturbances with sinusoidal and distorted sources, the 2UPQC-2PV configuration with dual-FS control can enhance load real power performance and dual-UPQC efficiency better than dual-PI control.

Original languageEnglish
Pages (from-to)21-56
Number of pages36
JournalInternational Journal on Electrical Engineering and Informatics
Volume13
Issue number1
DOIs
Publication statusPublished - Mar 2021

Keywords

  • 2UPQC-2PV
  • Dual-FS
  • Dual-PI
  • Load Real Power Flow
  • THD

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