Furthermore, the voltage of a storage battery is typically low, in the 12–48 V range, whereas the voltage of a DC bus is 400 V or higher to meet the requirements of an inverter or AC grid 3. Energy storage is required to provide stable power 2. Renewable energy, however, does not produce consistent energy because of weather conditions. These findings verified the validity of the proposed circuit’s theoretical analysis.īecause of the scarcity of fossil fuels and serious environmental issues in recent years, significant effort has been focused on the development of environmentally friendly distributed generation (DG) technologies 1. Finally, a 400 W experimental implementation of the converter was shown to achieve efficiencies of 93.5% and 92.4% in the step-up and step-down modes, respectively. We established a power loss model of the new topology, and the tapped-inductor turn ratio was optimized for high efficiency. The proposed circuit’s characteristics were thoroughly examined, including the voltage gain characteristics and the design of the main parameters. The voltage stress of S 1 was high, however, and this is a disadvantage of the proposed converter. The proposed converter has a simple structure and a high voltage gain in both the step-down (Buck) and step-up (Boost) operation modes. After analyzing and comparing the characteristics of each circuit, a bidirectional high-gain Cuk circuit with a tapped-inductor (reverse coupling) was proposed. In this research, a series of bidirectional high-gain Cuk circuits was derived by combining tapped inductors and bidirectional Cuk. High efficiency and a high step-up and step-down conversion ratio are the development trends. A bidirectional DC–DC converter is required for an energy storage system.
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