Power System Compensation Using a Power-Electronics Integrated Transformer

This paper presents a new transformer, that is, the custom power active transformer (CPAT)-which integrates shunt and series equivalent circuits within the transformer's magnetic structure. Thus, it provides power system services using a single transformer. The CPAT equipped with a power conver...

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Bibliographic Details
Published in:IEEE transactions on power delivery 2018-08, Vol.33 (4), p.1744-1754
Main Authors: Elsaharty, Mohamed Atef, Candela, Jose Ignacio, Rodriguez, Pedro
Format: Article
Language:English
Subjects:
Automatització i control de l'energia elèctrica
Circuit faults
Coils (windings)
Compensation
Convertidors de corrent elèctric
Distribució
Electric current converters
Electric potential
Electric power distribution
Electrònica de potència
Energia elèctrica
Energies
Equivalent circuits
Harmonic analysis
Inrush current
Magnetic circuits
Magnetic structure
power conditioning
Power converters
power distribution
Power electronics
Power transformers
Reactive power
Shunts (electrical)
Transformer cores
Transformers
Waveforms
Windings
Àrees temàtiques de la UPC
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Summary:This paper presents a new transformer, that is, the custom power active transformer (CPAT)-which integrates shunt and series equivalent circuits within the transformer's magnetic structure. Thus, it provides power system services using a single transformer. The CPAT equipped with a power converter can be utilized in distribution systems to control grid current and load-voltage waveforms while operating as a step-up or step-down transformer between the grid and load. Moreover, it can provide other services that any typical shunt-series compensation arrangement provides. The design and analysis of a single-phase CPAT are presented, showing the effect of coupling between windings and transformer parameters affecting CPAT operation. In this paper, control of the CPAT in a unified power-quality controller application is investigated to attenuate grid-current and load-voltage harmonics as well as compensate for reactive power requirements and mitigate grid inrush current. Through simulation and experimental implementation, the merits and performance of the CPAT were validated.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2017.2755725