The solar photovoltaic (PV) source is preferred to be functioned at low voltages. The practical systems such as grid-tied systems require a high output voltage causing a reduction in conversion efficiency. To handle this problem, this paper presents a new nonisolated boost DC–DC converter with a single switch suitable for solar PV applications. This converter comprises dual voltage multiplier (VM) cells, leakage energy recovery scheme, and coupled inductor (CI) techniques to get the desired output voltage from the converter. The double-clamp capacitors are connected to the primary side of the CI. The clamp capacitors can share the current through CI, and it ensures that the leakage inductance energy of CI can be recovered, leading to an expansion in the converter voltage gain and conversion efficiency. In addition, the clamp circuit clamps the voltage stress of the MOSFET switch, and the clamp capacitors will discharge at a specific time to increase the converter gain. A high duty cycle is not necessary for getting a high voltage gain, which avoids the diode reverse recovery issues. The converter can be operated in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM). A 500-W experimental prototype is developed for experimental validation, and the supporting simulation results are presented. The maximum efficiency of the converter is 93.94%, and, at full load, the efficiency is 92.55%.

中文翻译：

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用于太阳能光伏系统应用的具有高电压增益的新型非隔离式高升压 DC-DC 转换器拓扑，使用电压倍增器电池电路

太阳能光伏 (PV) 源优选在低电压下运行。诸如并网系统之类的实际系统需要高输出电压，从而导致转换效率降低。为了解决这个问题，本文提出了一种适用于太阳能光伏应用的新型非隔离升压 DC-DC 转换器，该转换器带有单个开关。该转换器包括双电压倍增器 (VM) 单元、泄漏能量恢复方案和耦合电感器 (CI) 技术，可从转换器获得所需的输出电压。双钳位电容器连接到 CI 的初级侧。钳位电容可以分担通过CI的电流，保证了CI的漏感能量能够得到恢复，从而扩大了转换器的电压增益和转换效率。此外，钳位电路对 MOSFET 开关的电压应力进行钳位，钳位电容将在特定时间放电以增加转换器增益。获得高电压增益不需要高占空比，从而避免了二极管反向恢复问题。该转换器可以在连续导通模式 (CCM) 和非连续导通模式 (DCM) 下运行。开发了一个 500W 的实验样机进行实验验证，并给出了配套的仿真结果。转换器的最大效率为 93.94%，满载时的效率为 92.55%。该转换器可以在连续导通模式 (CCM) 和非连续导通模式 (DCM) 下运行。开发了一个 500W 的实验样机进行实验验证，并给出了配套的仿真结果。转换器的最大效率为 93.94%，满载时的效率为 92.55%。该转换器可以在连续导通模式 (CCM) 和非连续导通模式 (DCM) 下运行。开发了一个 500W 的实验样机进行实验验证，并给出了配套的仿真结果。转换器的最大效率为 93.94%，满载时的效率为 92.55%。