Three-Phase Grid-Connected Inverter Power Control under Unbalanced Grid Conditions Using a Time-Domain Symmetrical Components Extraction Method

Mohammad Alathamneh (), Haneen Ghanayem, Xingyu Yang 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
Xingyu Yang: 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 19, 1-16

Abstract: Presented in this paper is a method of bidirectional real and reactive power control of a three-phase grid-connected inverter under unbalanced grid situations. Unbalanced three-phase load and unbalanced grid impedance are illustrations of unbalanced grid issues that have been investigated. As a result, both grid currents and point-of-common-coupling (PCC) voltages will be unbalanced. The real and reactive power that is delivered to the grid oscillates by a significant amount in these unbalanced conditions. A time-domain symmetrical components extraction approach is used to calculate the inverter’s reference currents from the negative- and zero-sequence components of the measured currents. The suggested approach corrects unbalanced grid currents and unbalanced PCC voltages, and provides the desired real and reactive power to the grid when unbalanced situations exist. As a consequence, power oscillations will be eliminated, and power control will be possible. The suggested method’s performance is supported by simulation, and various experimental results are obtained utilizing the dSPACE DS1202 real-time interface platform.

Keywords: active filters; bidirectional power flow; DC-AC power converters; parameter extraction; 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 (4)

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