Bidirectional Power Control for a Three-Phase Grid-Connected Inverter under Unbalanced Grid Conditions Using a Proportional-Resonant and a Modified Time-Domain Symmetrical Components Extraction Method

Mohammad Alathamneh (), Haneen Ghanayem and R. M. Nelms ()
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Mohammad Alathamneh: Electrical and Computer Engineering Department, Auburn University, Auburn, AL 36849, USA
Haneen Ghanayem: Electrical and Computer Engineering Department, Auburn University, Auburn, AL 36849, USA
R. M. Nelms: Electrical and Computer Engineering Department, Auburn University, Auburn, AL 36849, USA

Energies, 2022, vol. 15, issue 24, 1-23

Abstract: Discussed in this study is a bidirectional power control technique for a three-phase grid connected inverter under different unbalanced grid conditions. Prior researchers have focused on either solving the unbalanced problem or controlling the power. However, this paper addresses both issues: solving the unbalanced problems of the point-of-common-coupling (PCC) voltages and grid currents, and reducing the large ripple in the real and reactive power while also applying a bidirectional power control under weak grid conditions. A phase-locked loop (PLL) is not required because a simpler PR controller was employed. A symmetrical components extraction method was used. Compared to previous symmetrical component techniques that used complicated transformations, this approach requires less computations. Since the unbalanced load issue has been resolved, other loads connected to the grid will not be impacted. MATLAB Simulink was used in simulation experiments, and a real-time interface platform dSPACE DS1202 was used to verify the proposed control method efficacy experimentally.

Keywords: active filters; bidirectional power flow; DC-AC power converters; parameter extraction; proportional-resonant controller; PR controller; power control; power conversion; voltage-source converters (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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