光伏应用高增益改进型SEPIC变换器的设计与分析

2018 IEEE International Conference on Innovative Research and Development (ICIRD) Pub Date : 2018-05-01 DOI:10.1109/ICIRD.2018.8376319

H. Suryoatmojo, I. Dilianto, Suwito, R. Mardiyanto, E. Setijadi, D. Riawan

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引用次数: 9

摘要

在设计光伏并网系统时，通常需要采用DC-DC变换器来提高光伏的输出电压。为了提高光伏的输出电压，获得较高的转换效率，最常见的DC-DC变换器设计通常采用高增益静态变换器。使用的一种转换器是SEPIC转换器拓扑。然而，当占空比设置为0.82时，传统的DC-DC转换器拓扑(如SEPIC转换器)只能增加5倍的输入电压。同时，为了满足逆变器的直流输入电压，变流器的输入电压必须提高10倍以上。因此，为了克服这些问题，本文提出了用于光伏应用的DC-DC改进SEPIC转换器拓扑设计。对传统SEPIC变换器的修改是通过增加电容器和二极管来完成的。实验结果表明，该变换器可将输出电压提高约10倍，效率约为91.5%。此外，该变换器的拓扑结构可以有效地应用于光伏系统。

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Design and analysis of high gain modified SEPIC converter for photovoltaic applications

In designing photovoltaic systems connected to the grid system usually DC-DC converter is required to increase the output voltage of the photovoltaic. The most commonly design of DC-DC converters are typically used a converters with high gain static in order to increase the output voltage of the photovoltaic and obtain a high conversion efficiency. One type of converter used is a SEPIC converter topology. However, the conventional DC-DC converter topologies such as SEPIC converters can only increase by 5 times of the input voltage when the Duty Cycle is set to 0.82. Meanwhile, to meet the dc input voltage of the inverter, the input voltage of the converters have to increase above than 10 times. Therefore, to overcome these problems, this paper proposes the design of DC-DC modified SEPIC converter topologies for photovoltaic applications. Modifications to the conventional SEPIC converter is done by adding capacitors and diodes. From the experimental results shows that this converter can increase the output voltage about 10 times and has the efficiency about 91.5%. Furthermore, topology of the this converter can be effectively applied for photovoltaic system.

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2018 IEEE International Conference on Innovative Research and Development (ICIRD)

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