基于双管Buck-Boost变换器的直流微电网光伏接口控制分析  

Analysis on Control Strategy of Two-switch Buck-Boost Converter for Photovoltaic Interface in DC Microgrid

作　　者：杨晨[1] 谢少军[1] 毛玲[1] 秦岭[1] 

机构地区：[1]江苏省新能源发电与电能变换重点实验室,南京航空航天大学,江苏省南京市210016

出　　处：《电力系统自动化》2012年第13期45-50,共6页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(51077070);南京航空航天大学基本科研业务费专项资金资助项目(NJ2011005)~~

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。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.

关 键 词：微电网 光伏发电 并网接口 BUCK-BOOST变换器 控制策略 小信号模型 

分 类 号：TM46[电气工程—电器]