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A novel dual input high-step up DC-DC converter with one bi-directional port for renewables

Bagherpour Mohammad Amin, Farhadi Payam, Hassanlouei Nazanin Bagherpour

Journal of Power Technologies

2019

Vol. 99, nr 4

264--271

In this paper, a novel dual-input high step DC-DC converter is developed. The structure of proposed converter consists of one unidirectional and one bidirectional port. The bidirectional port is connected to a battery for energy balancing purpose. That is, the battery stores extra produced energy and/or releases stored energy in situations where there is a lack of energy. On the other hand, the bidirectional port is employed as the main power source. The high step-up output voltage gain of the proposed converter makes it suitable for renewable energy applications where the output voltage is low. The proposed structure is superior over the previously proposed ones in terms of the number of components, energy interaction, simple configuration, and flexibility. The experimental results obtained in three different modes (i.e., without battery, with battery charging, and with battery discharging) are presented to verify the theoretical analysis and the performance of the proposed converter.

High efficiency high step-up DC/DC converters : a review

Tomaszuk A., Krupa A.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2011

Vol. 59, nr 4

475-483

The renewable energy sources such as PV modules, fuel cells or energy storage devices such as super capacitors or batteries deliver output voltage at the range of around 12 to 70 VDC. In order to connect them to the grid the voltage level should be adjusted according to the electrical network standards in the countries. First of all the voltage should be stepped up to sufficient level at which the DC/AC conversion can be performed to AC mains voltage requirements. Overall performance of the renewable energy system is then affected by the efficiency of step-up DC/DC converters, which are the key parts in the system power chain. This review is focused on high efficiency step-up DC/DC converters with high voltage gain. The differentiation is based on the presence or lack of galvanic isolation. A comparison and discussion of different DC/DC step-up topologies will be performed across number of parameters and presented in this paper.