The new energy resource industry such as photovoltaic power generation and fuel cell is gradually rising. The high boost DC-DC converter can increase the photovoltaic output voltage to the conventional DC busbar voltage to ensure the nor-mal grid connection and inversion,but is difficult to realize the voltage requirements of application scenario. In order to elimi-nate the defects,the high-gain DC converter topologies in different applications are introduced for photovoltaic power generation industry,and the high-gain converter is classified. The topologies of several high-gain converters are summarized,and their working principles,advantages and disadvantages are analyzed. The development trend and challenge of the future DC converter topology are pointed out.%以光伏、燃料电池为代表的新能源产业正逐渐兴起,通过高升压的DC-DC变换器将光伏输出电压提升到常规母线直流电压,用来保证正常的并网逆变,但由于其输出电压等级较低,很难达到应用场合所需的电压要求.为了克服这种缺陷,主要介绍目前光伏发电行业不同应用场合下的高增益直流变换器拓扑,同时对高增益变换器进行分类.把几种高增益直流变换器的拓扑进行总结,并分析其工作原理以及优缺点,指出未来直流变换器拓扑的发展趋势和所面临的挑战.
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