Renewable energy sources such as fuel cells and photovoltaics (PV) modules are widely installed in recent years. Due to these sources’ characteristics such as low port voltage, current-harmonic-sensitive, and weak short-circuit withstanding capability, their interface converters usually require high voltage gains, low high-frequency (HF) current harmonics, and short-circuit protection. At present, the existing step-up isolated dc_dc converters are usually combined with two capacitor-connected terminals or one capacitor-connected terminal plus one inductor-connected terminal, failing to obtain the low HF current harmonics and convenient direct current control (DCC) on both ports. Hence, a dual-inductor-connected (DIC) isolated dc_dc converter is proposed in this article with the inductor connection on both ports. Then, low HF current harmonics and convenient DCC capability can be realized simultaneously through the connected inductors. Meanwhile, the proposed converter can also achieve voltage spike suppression and soft-switching operation without snubber circuits, and its inherent voltage boost function makes it suitable for high voltage-gain applications. Subsequently, the modulation scheme, topology characters, and control scheme are elaborated in this article. The experimental results based on a scale-down laboratory prototype are presented to verify the steady-state and transient-state performance of the proposed converter.

中文翻译：

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一种具有直流控制和低电流谐波的双电感连接隔离式DC__C变换器


近年来，燃料电池和光伏（PV）模块等可再生能源得到广泛安装。由于这些电源具有低端口电压、对电流谐波敏感、抗短路能力弱等特点，其接口转换器通常需要高电压增益、低高频电流谐波和短路保护。 。目前，现有的升压隔离dc_dc变换器通常采用两个电容连接端或一个电容连接端加一个电感连接端的组合，无法获得低高频电流谐波和方便的直流控制(DCC)。两个端口。因此，本文提出了一种双电感连接 (DIC) 隔离式 dc_dc 转换器，在两个端口上都有电感连接。然后，通过连接的电感器可以同时实现低高频电流谐波和方便的 DCC 能力。同时，所提出的转换器还可以在没有缓冲电路的情况下实现电压尖峰抑制和软开关操作，其固有的升压功能使其适合高电压增益应用。随后，本文详细阐述了调制方案、拓扑特征和控制方案。提出了基于缩小规模实验室原型的实验结果，以验证所提出的转换器的稳态和瞬态性能。