Aimed at new energy combined power supply systems such as photovoltaic and fuel cells,a non-isolated dual-input high step-up DC-DC converter is proposed. This converter is based on a dual-input Boost circuit,and the two input sources and output,as well as each switch tube,share a common ground. A diode capacitor network is introduced at the later stage to achieve high voltage gain and reduce the voltage stress of switching devices. The two input sources can supply power at the same time,and any one of them can supply power independently without adding extra switch tubes. In addition,the voltage gain can be further improved by expanding the booster unit to adapt to different application scenarios. The working principle for the converter and its extended circuit and the corresponding performance such as voltage gain characteristics and voltage stress of switching devices in three power supply modes are analyzed in detail,and its performance is compared with those of the existing similar converters. Finally,an experimental prototype was built to verify its feasibility.
关键词
双输入/高增益/DC-DC变换器/新能源发电
Key words
Dual-input/high step-up/DC-DC converter/new energy power generation
维普
万方数据