Control Method of Four Wire Active Power Filter Based on Three-Phase Neutral Point Clamped T-Type Converter

Dawid Buła, Grzegorz Jarek, Jarosław Michalak and Marcin Zygmanowski
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Dawid Buła: Faculty of Electrical Engineering, Silesian University of Technology, 44-100 Gliwice, Poland
Grzegorz Jarek: Faculty of Electrical Engineering, Silesian University of Technology, 44-100 Gliwice, Poland
Jarosław Michalak: Faculty of Electrical Engineering, Silesian University of Technology, 44-100 Gliwice, Poland
Marcin Zygmanowski: Faculty of Electrical Engineering, Silesian University of Technology, 44-100 Gliwice, Poland

Energies, 2021, vol. 14, issue 24, 1-18

Abstract: An active power filter based on a three-level neutral point clamped T-type converter with LCL input filter is presented in the paper. The main goal of the paper is the analysis of a control system that ensures independent control of a current in each phase. The presented control method of the filter allows reactive power compensation and/or a higher harmonics reduction to be achieved in each phase independently, with the possibility of control tan (φ) coefficient. This allows the power flow between the phases to be minimalized and reduces the RMS values of filter currents without the need to balance grid currents. The analysis presents the possibility of an operation in different modes, which was verified by experimental results. The results have been obtained in a 20 A RMS laboratory system described in the paper. The results reveal relatively low power losses, which are a feature of the selected three-level T-type topology. Additionally, that topology, when compared to a two-level one, ensures the reduction in current ripples with the same parameters of passive components.

Keywords: power quality; three level T-type converter; active power filter; four wire system (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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