Buck-Boost/Flyback Hybrid Converter for Solar Power System Applications

Abstract

This paper proposes a hybrid converter to supply power from solar power source to load. Since power is generated by solar power, which depends on the intensity of solar power, the power generated by the solar power does not keep at a constant power. Therefore, the proposed system needs a battery to balance power between solar power and load. When the proposed one uses the battery to balance powers, the proposed circuit requires a charger and discharger. To simplify the proposed converter, a buck-boost converter and flyback converter can be combined to implement the battery charging and discharging functions. With this approach, the proposed converter can be operated with zero-voltage switching (ZVS) at turn-on transition to reduce switching loss of switch when the proposed one is operated in the discharging mode. In addition, the proposed hybrid converter has several merits, which are less component counts, lighter weight, smaller size and higher conversion efficiency. As compared with the conventional counterparts with hard-switching circuit, the proposed one can increase conversion efficiency of 4% and achieve efficiency of 85% under full load condition when the proposed one is operated in the discharging mode. Experimental results which are obtained from a prototype with output voltage of 10 V and maximum output power 20 W have been implemented to verify its feasibility. It is suitable for an electronic sign indicating LED within 200 W, which is used in the night time.

Special Issue on Application of Electronic Devices on Intelligent System

“…Tseng et al reported "Buck-Boost/Flyback Hybrid Converter for Solar Power System Applications" [1]. In this paper, the authors propose a hybrid converter to supply power from solar power source to load.…”

A Novel Feedback Linearisation Control of Flyback Converter

“…Currently, the improvement of the power electronic equipment has led to momentous growth in many industrial segments, such as e-mobility or renewable energy (Pesce et al, 2021;Ramos-Paja et al, 2021;Tseng and Fan, 2021). A common feature of the above industrial segments is that the auxiliary circuits of the equipment require a stable direct current (DC) voltage, which is achieved by a DC/DC or alternating current (AC)/DC converter.…”

Design and analysis of three phase inverter based Solar PV powered single switch Buck-Boost converter with reduced THD for industrial applications

“…To increase the efficiency of the SPV system, MPPT algorithm is much needed. Though there are many MPPT algorithms in the literature, P&O algorithm is the simplest one which works towards maximum power point using operating point irrespective of the atmospheric conditions, aging, etc., Generally this method compares the SPV current (Ipv) and SPV voltage (Vpv), introduce delay then controls the values of Ipv and Vpv, resulting in less system response, fluctuation in finding MPP during steady state [1][2][3]. To overcome the issue mentioned, this work proposes a modified P&O algorithm that adjusts hysteresis bandwidth & reference step size.…”