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A multi-input, multi-stage step-up DC-DC converter for PV applications
Alexandria Engineering Journal ( IF 6.8 ) Pub Date : 2021-01-04 , DOI: 10.1016/j.aej.2020.12.030
Mohammed Alsolami

The paper introduces a step-up multiple-input multi-stage dc-dc converter with a soft-switching for Photovoltaic (PV) applications. The proposed topology is constructed from series connection of switched capacitor circuits to minimize the effects of partial shading and mismatch between PV modules. A soft switching is achieved for the entire switches in the converter with no need for additional components. The applied technique utilizes the stray inductance of PCB traces to create a LC circuit so that the zero current switching is achieved for all switches. Moreover, the converter will take advantage of the superior features of Wideband gap devices in order to operate at high switching frequency. As a result, bulky capacitors in switched-capacitor circuits are significantly reduced, hence, small size multilayers ceramic capacitors with high temperature capability will be employed. Furthermore, with the lower losses and the higher temperature capability of Wideband gap devices, the thermal requirements will be reduced and with fast reverse recovery time, the snubber circuit are not required. Simulation results are presented, laboratory prototype is constructed, and experimental results are given at rated power to validate the feasibility of proposed dc-dc converter under soft switching operation.



中文翻译:

用于光伏应用的多输入,多级升压DC-DC转换器

本文介绍了一种用于光伏(PV)应用的具有软开关的升压多输入多级DC-DC转换器。拟议的拓扑结构是由开关电容器电路的串联连接构成的,以最大程度地减小部分阴影和PV模块之间不匹配的影响。无需额外组件即可实现转换器中整个开关的软开关。应用的技术利用PCB走线的杂散电感来创建LC电路,从而实现所有开关的零电流开关。此外,该转换器将利用宽带隙器件的优越特性来在高开关频率下工作。结果,大大减少了开关电容器电路中的大容量电容器,因此,将使用具有高温能力的小尺寸多层陶瓷电容器。此外,宽带隙器件具有较低的损耗和较高的温度能力,将降低散热要求,并具有快速的反向恢复时间,因此无需缓冲电路。给出了仿真结果,构建了实验室原型,并给出了额定功率下的实验结果,以验证所提出的DC-DC转换器在软开关操作下的可行性。

更新日期:2021-01-05
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