In this paper, a novel high-gain DC–DC converter which is suitable for integrating low-voltage renewable energy source with a common DC bus is presented. The proposed converter is synthesised from a quadratic boost converter (QBC). Two QBC structures are interleaved to reduce the current ripple at the input port (12.9% of input current). The voltage conversion ratio of the proposed interleaved quadratic boost converter (IQBC) is extended by using the voltage lift technique. The energy storage inductors are judiciously coupled to realise a compact IQBC. Experimental results obtained from a 24 to 380 V, 100 W prototype converter validate the novel gain extension method and proposed design concepts. Under full-load condition, the practical efficiency value of the proposed converter is 92.49%. By implementing a simple closed loop, the output voltage of the proposed converter is regulated and maintained constant at 380 V when the input voltage and load current change. Under practical conditions, the percentage voltage regulation and the time response characteristics of the proposed IQBC are extremely satisfactory.

中文翻译：

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具有高电压增益能力的交错二次升压 DC-DC 转换器

在本文中，提出了一种适用于将低压可再生能源与公共直流母线集成的新型高增益 DC-DC 转换器。建议的转换器由二次升压转换器 (QBC) 合成。两个 QBC 结构交错以减少输入端口的电流纹波（输入电流的 12.9%）。所提出的交错二次升压转换器 (IQBC) 的电压转换比通过使用电压提升技术进行了扩展。明智地耦合储能电感器以实现紧凑的 IQBC。从 24 至 380 V、100 W 原型转换器获得的实验结果验证了新颖的增益扩展方法和提出的设计概念。在满载条件下，所提出的转换器的实用效率值为 92.49%。通过实现一个简单的闭环，当输入电压和负载电流变化时，建议转换器的输出电压被调节并保持恒定在 380 V。在条件下，所提出的 IQBC 的百分比电压调节和时间响应特性非常实用。