Four Leg DSTATCOM based on Synchronous Reference Frame Theory with Enhanced Phase Locked Loop for Compensating a Four Wire Distribution Network under Unbalanced PCC Voltages and Loads

  • Ali Chebabhi ICEPS Laboratory, Department of Electrical Engineering, University of Sidi-Bel-Abbes, Algeria.
  • Mohammed Karim Fellah ICEPS Laboratory, Department of Electrical Engineering, University of Sidi-Bel-Abbes, Algeria.
  • Abdelhalim Kessal Faculty of Science and Technology, University of Bordj Bou Arreridj. Algeria
  • Mohamed Fouad Benkhoris IREENA Laboratory (Institut de Recherche en Electronique et Electrotechnique de Nantes Atlantique), University of Nantes at Saint Nazaire. France


This paper presents a Distribution Static Compensator based on Four Leg Voltage Source Inverter (4-leg VSIDSTATCOM)with controlling by Synchronous Reference Frame theory (SRF) in the dq0 frame with EnhancedPhase Locked Loop based on Self-Tuning Filter (EPLL-STF) used for compensating four-wire distribution systems.The proposed 4-leg VSI DSTATCOM is used for load balancing, source harmonics filtering, reactive power compensationand power factor correction, and source neutral wire current compensation at the point of common coupling(PCC) in the four-wire distribution network under unbalanced linear loads and nonlinear load variation with varioussource and PCC voltages conditions. The new SRF theory with EPLL based on STF is used for harmonicscurrent extraction and good estimation of PCC voltages without harmonics under unbalanced PCC voltages andloads. Three dimensional space vector modulation (3D SVM) is used to generate the gate switching pulses forthe 4-leg VSI and to circumvent the problems of the switching frequency variant, and for DC bus voltage capacitorand compensating 4-leg VSI DSTATCOM currents we are going to use the PI controller (Proportional-Integral).The effectiveness of the proposed 4-leg DSTATCOM under unbalanced PCC voltages and loads with various controlstrategies are demonstrated through simulation using sim-power-system and S-Function integrated in Matlabsimulink.


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How to Cite
CHEBABHI, Ali et al. Four Leg DSTATCOM based on Synchronous Reference Frame Theory with Enhanced Phase Locked Loop for Compensating a Four Wire Distribution Network under Unbalanced PCC Voltages and Loads. Journal of Power Technologies, [S.l.], v. 96, n. 1, p. 15--26, apr. 2016. ISSN 2083-4195. Available at: <>. Date accessed: 02 aug. 2021.
Electrical Engineering


Four Leg Voltage Source Inverter (4-leg VSI); Distribution Static Compensator (DSTATCOM); Enhanced Phase Locked Loop based (EPLL); Self Tuning Filter (STF); Synchronous Reference Frame Theory (SRF); unbalanced PCC voltage; 3DSVM; harmonics; reactive power

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