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中文摘要：
分析了分布式直流供电系统中光伏接口单元的控制要求,给出了相应的控制策略。以双管Buck-Boost变换器型接口单元为例,介绍了其控制系统结构和小信号模型的建立,分析了接口变换器的工作过程,讨论了闭环控制参数选取依据。最后,在一台3kW的双管Buck-Boost变换器实验样机上,对理论分析进行了验证,实现了分布式直流供电系统光伏接口单元的基本控制功能。
英文摘要：
Based on the control requirements of photovoltaic interface in the distributed DC power system, a control strategy for photovoltaic converter is proposed. Taking two-switch Buck-Boost converter for example, the control system structure for the converter is introduced and the small signal model is established. The operating principle is analyzed and how to select the close-loop control parameters is discussed. Finally, the control strategy was carried out on a 3 kW two-switch Buck-Boost converter. The experimental results show that the photovoltaic interface can work effectively to match the basic control requirements.
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