Sliding Mode Control of the Isolated Bridgeless SEPIC High Power Factor Rectifier Interfacing an AC Source with a LVDC Distribution Bus

Abstract

This paper deals with the analysis and design of a sliding mode-based controller to obtain high power factor (HPF) in the bridgeless isolated version of the single ended primary inductor converter (SEPIC) operating as a single-phase rectifier. In the work reported here, the converter is used as a unidirectional isolated interface between an AC source and a low voltage direct current (LVDC) distribution bus. The sliding-mode control is used to ensure the tracking of a high quality current reference at the input side, which is obtained from a sine waveform generator synchronized with the grid. The feasibility of the proposal is validated using simulation and experimental results, both of them confirming a reliable operation and showing good static and dynamic performances.

Application of DC-DC Converters at Renewable Energy

“…The advantage of this topology include continuous input current and lower switching stress that leads to higher efficiency. In [25] a novel SEPIC converter is proposed that is suitable for high power factor correction. Proposed converter is an isolated bridgeless SEPIC and operates like a single-phase rectifier controlled with slide mode to achieve a high power factor.…”

“…The state space model is able to represent higher-order real systems in the time domain simply. Since SMC integration with DC-DC converter [25].…”

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

“…In virtually all these cases, the connection to an electric power supplier is normally done to an AC distribution network. This connection implies the use of at least one electronic AC-DC converter with power factor compensation to meet the strict requirement of grid compatibility, safety and power quality standards [12].…”

“…As a consequence, the useful lifetime of capacitors (usually electrolytic) or batteries is reduced. Currently, there has been interest in studying alternatives for reducing the value of capacitors' output and using capacitors with greater efficiency, such as film or ceramic capacitors, for power decoupling and achieving better results when combined with the appropriate control techniques [12,23,24]. The addition of dynamic voltage restorers or active power decoupling are discussed in [25], with the advantage of improving energy efficiency and reducing the ripple of the output voltage.…”