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Open AccessFeature PaperEditor’s ChoiceArticle

Control of Single-Phase Electrolytic Capacitor-Less Isolated Converter for DC Low Voltage Residential Networks

1
Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, Portugal
2
INESC-ID, 1000-029 Lisboa, Portugal
3
Instituto Superior de Engenharia de Lisboa, Polytechnic Institute of Lisbon, 1959-007 Lisboa, Portugal
*
Author to whom correspondence should be addressed.
Electronics 2020, 9(9), 1401; https://doi.org/10.3390/electronics9091401
Received: 31 July 2020 / Revised: 24 August 2020 / Accepted: 27 August 2020 / Published: 29 August 2020
In recent years, there has been a desire to improve electricity generation and consumption, to reach sustainability. Technological solutions today allow a rational use of electricity with good overall performance. Traditionally, from production to distribution, electrical energy is AC-supported for compatibility reasons and easy voltage level transformation. However, nowadays most electric loads need DC power to work properly. A single high-efficiency central AC-DC power converter may be advantageous in eliminating several less efficient AC-DC embedded converters, distributed all over a residential area. This paper presents a new single-phase AC-DC converter using one active bridge (most isolated topologies are based on the dual active bridge concept) and a high-frequency isolation transformer with low-value non-electrolytic capacitors, together with its control system design. The converter can be introduced into future low-voltage DC microgrids for residential buildings, as an alternative to several embedded AC-DC converters. Non-linear control techniques (sliding mode control and the Lyapunov direct method) are employed to guarantee stability in the output DC low voltage with near unity power factor compensation in the AC grid. The designed converter and controllers were simulated using Matlab/Simulink and tested in a lab experimental prototype using digital signal processing (DSP) to evaluate system performance. View Full-Text
Keywords: single-phase AC-DC converters; isolated PFC rectifier; sliding mode control; Lyapunov direct method; DC residential microgrids; DSP TMS320F28379D single-phase AC-DC converters; isolated PFC rectifier; sliding mode control; Lyapunov direct method; DC residential microgrids; DSP TMS320F28379D
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Santos, N.; Silva, J.F.; Soares, V. Control of Single-Phase Electrolytic Capacitor-Less Isolated Converter for DC Low Voltage Residential Networks. Electronics 2020, 9, 1401.

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