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

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...

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Bibliographic Details
Published in:Energies (Basel) 2021-12, Vol.14 (24), p.8427
Main Authors: Buła, Dawid, Jarek, Grzegorz, Michalak, Jarosław, Zygmanowski, Marcin
Format: Article
Language:English
Subjects:
active power filter
Algorithms
Control methods
Control systems
Converters
Electric power
four wire system
Fourier transforms
Higher harmonics
Load
Methods
Passive components
Power flow
power quality
Reactive power
three level T-type converter
Topology
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Summary: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 ARMS 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.
ISSN:1996-1073
1996-1073
DOI:10.3390/en14248427