| Today’s world’s energy crisis is getting worse, the development and use of clean and renewable energy are also being studied. New energy sources include solar energy, wind energy, etc. There are many other marine renewable energy, and a variety of energy has its own advantages and disadvantages. Therefore, in the present study of renewable energy, a variety of complementary utilization of renewable energy is the future trend of development and research. In addition, the traditional single-energy independent power generation system due to its low efficiency, poor stability unable to meet the changing load demand, therefore, will be more independent power generation system to a common DC distributed power generation system in the form of bus is connected to form the future direction of new energy utilization.DC / DC converter is a new energy technologies in the most critical part, therefore, the research and innovation of new energy technology is on the DC / DC converter topologies research and innovation. The current DC / DC converter is single function, low efficiency and poor scalability, therefore, it cannot be effectively used in complementary use of variety energies of distributed power generation systems. Based on a detailed analysis of several converters and contrasts presented the problems existing converter. In this paper, the basic converter on the existing basis, its deformation evolution and expansion of research and proposed a small distributed power generation system can be applied in a bi-directional DC / DC converter topologies, the topology can achieve more an energy can be individually or simultaneously via a common DC / DC converter channel power to the load, and the energy transfer is bidirectional. In addition, conversion channel can operate at Buck, Buck-Boost and Boost mode.In this paper, dual input source as an example detailed in-depth analysis of the converter working principle and the state, deriving its basic input-output relations and output ripple analysis, and the use of MATLAB / Simulink simulation and optimization of the model, and finally by an actual prototype experiments. In addition, a plurality of DC output of the converter is connected to form a distributed power generation system based on the DC bus. In a distributed power generation system, the converter and flexible, easy to expand.Since the converter has a simple structure, scalability, high efficiency, small input and output ripple, EMI and low, so it has a variety of renewable energy in the power supply system and joint hybrid system or pure electric system wide range of applications. |
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