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首页> 外文期刊>Power Electronics, IET >Dual-coupled inductors-based high step-up DC/DC converter without input electrolytic capacitor for PV application
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Dual-coupled inductors-based high step-up DC/DC converter without input electrolytic capacitor for PV application

机译：基于双耦合电感器的高升压型DC / DC转换器，无输入电解电容器，用于PV应用

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摘要

To alleviate the power losses caused by the fluctuation of the output current of the photovoltaic (PV) array, a DC/DC converter with high-voltage gain is proposed for PV generation systems. The input current ripples of the proposed converter can be greatly reduced by making use of coupled inductors. Then the electrolytic capacitor on the input side could be replaced by polypropylene capacitor with smaller capacity and size. In addition, the snubber and the energy recovery circuits constructed by diodes and storage capacitors can be operated to reduce the voltage spikes of the switch tubes and losses caused by the leakage inductance. Based on analysing the inherent five operating modes of the proposed converter, high-voltage gain and the zero input current ripples characteristics of the proposed converter is manifested. The theoretical analysis is then verified by a 150 W-rated experimental prototype, and the results show that the proposed converter can quickly and accurately trace the maximum power point of PV array based on the modified incremental conductance method with high-voltage gain and low current ripples.
机译：为了减轻由光伏（PV）阵列的输出电流的波动引起的功率损耗，提出了一种用于光伏发电系统的具有高电压增益的DC / DC转换器。通过使用耦合电感器，可以大大减少所提出的转换器的输入电流纹波。然后可以用容量和尺寸较小的聚丙烯电容器代替输入侧的电解电容器。另外，可以操作由二极管和存储电容器构成的缓冲器和能量回收电路，以减少开关管的电压尖峰和由漏感引起的损耗。在分析了所提出的转换器固有的五种工作模式的基础上，提出了所提出的转换器的高压增益和零输入电流纹波特性。然后通过150 aW额定实验原型验证了理论分析，结果表明，基于改进的增量电导法，高电压增益和低电流，该转换器可以快速，准确地跟踪光伏阵列的最大功率点。涟漪。

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