Renewable Energy based microgrids are being considered to provide electricity for the expanding energy demand in the grid distribution network and grid isolated areas. The technical challenges associated with the operation and controls are immense. Electricity generation by Renewable Energy Sources is of stochastic nature such that there is a demand for regulation of voltage output in order to ...

The use of renewable energy sources such as solar photovoltaic, wind, and fuel cells is becoming increasingly prevalent due to a combination environmental concerns technological advancements, well decreasing production costs. Power electronics DC-DC converters play key role in various applications, including hybrid systems, vehicles, aerospace, satellite portable electronic devices. These are u...

This work was supported by CNPq. Dr. Spiazzi visit to the University of Campinas was supported by FAPESP. Abstract The effects of a non negligible source impedance, due to the presence of an input EMI filter, on the stability of Power Factor Preregulators with average current control are analyzed by using a State Space Averaged model. The modeling allows to derive a simple expression for the lo...

This paper presents an analysis of the effect of parasitic resistances on the performance of DC-DC Single Ended Primary Inductor Converter (SEPIC) in photovoltaic maximum power point tracking (MPPT) applications. The energy storage elements incorporated in the SEPIC converter possess parasitic resistances. Although ideal components significantly simplifies model development, but neglecting the ...

Most of the power electronic equipments are operated with dc supply. For reliable and stable operation, dc supply should be regulated. The regulation can be performed using buck, boost, Cûk, Sepic, Flyback regulators. Except single phase rectifier with resistive load all other rectifiers input currents are non sinusoidal in nature. This front end current distortion of rectifier converter leads ...

0306-2619/$ see front matter 2010 Elsevier Ltd. A doi:10.1016/j.apenergy.2010.04.012 * Corresponding author. Tel.: +98 2177240540 50x E-mail address: [email protected] (M. Kalantar). In this paper, modeling, analysis, design, simulation and control of a single ended primary inductor converter (SEPIC) are discussed for renewable energy applications. Because the traditional control methods such...

 The employ of the fluorescent lamps without electrodes (electrodeless) have been increasing, because of their features such as lifetime and lumen efficiency, when compared to conventional fluorescent and high pressure sodium (HPS) lamps. This paper presents a luminous flux variation strategy using a Single Ended Primary Inductance Converter (SEPIC) for feeding of electrodeless fluorescent lam...

Power Factor Preregulators (PFP) have been used to improve input current waveform of off-line power supplies. There are two major approaches in implementing control circuits in PFP: the multiplier approach and the voltage-follower approach. The simplest one is the voltage-follower approach because the converter operates in discontinuous conduction mode (DCM), and only one loop control is requir...

In this paper a modified design of a sliding mode controller based on fuzzy logic for a soft switching sepic converter is introduced. Here a proportional integral (PI)-type current mode control is employed and a sliding mode controller is designed utilizing fuzzy algorithm. Sliding mode controller ensures robustness against all variations and fuzzy logic helps to reduce chattering phenomenon in...

A non-isolated high voltage gain DC-DC converter has been presented in this paper. The boost, SEPIC and modified SEPIC converters were nalyzed and their performance was compared with the proposed converter. The proposed converter has been designed for the input voltage of 5 V and an output voltage of 150 V with 100 W output power. The efficiency of the converter obtained was 92.5%, which is hig...