Shunt Active Power Filter Based on Cascaded Transformers Coupled With Three-Phase Bridge Converters

This paper proposes a multilevel shunt active power filter (SAPF) to deal with either harmonic current compensation or reactive power compensation. Such a device can reduce the harmonic distortion at the grid currents provided by nonlinear loads located in stiff systems. The proposed SAPF is based o...

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Bibliographic Details
Published in:IEEE transactions on industry applications 2017-09, Vol.53 (5), p.4673-4681
Main Authors: de Almeida Carlos, Gregory Arthur, Jacobina, Cursino Brandao, Mello, Joao Paulo Ramos Agra, Santos, Euzeli Cipriano dos
Format: Article
Language:English
Subjects:
Capacitors
Cascaded transformers
Harmonic analysis
multilevel converters
Power system harmonics
Pulse width modulation
shunt active power filter
Shunts (electrical)
Switches
Voltage control
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Summary:This paper proposes a multilevel shunt active power filter (SAPF) to deal with either harmonic current compensation or reactive power compensation. Such a device can reduce the harmonic distortion at the grid currents provided by nonlinear loads located in stiff systems. The proposed SAPF is based on three-phase bridge converters connected to cascaded single-phase transformers. The transformer arrangement permits the compensator to use a single dc-link unit, which simplifies the control strategy and the number of sensors. The multilevel waveforms are generated by using a suitable pulse-width modulation (PWM) strategy associated with the transformer turns ratio. Modularity and simple maintenance make the proposed SAPF an attractive solution compared with some conventional configurations. The model, the PWM technique, and the control strategy are presented, as well as studies considering harmonic distortion and semiconductor losses estimation. Simulation and experimental results are presented in order to validate theoretical approaches.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2017.2702666