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大扰动Buck-Boost变换器的鲁棒高阶滑模控制

DOI: 10.13334/j.0258-8013.pcsee.2015.07.023, PP. 1740-1748

Keywords: Buck-Boost变换器,高阶滑模控制,Super-Twisting算法,大扰动,鲁棒性,随机间歇性

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Abstract:

在利用诸如风、光、氢等随机性新能源发电的过程中,由于间歇性的能量输入和不断变化的输出负载等原因,对电源变换器的鲁棒性设计提出了更高的要求。针对传统滑模控制变换器自身存在不可避免的抖颤问题,该文基于一种Super-Twisting高阶滑模控制算法,设计了以TMS320F28035为控制核心的无抖颤、强鲁棒滑模电源变换器。并以Buck-Boost变换器为例,针对随机性新能源发电中输入输出端存在的大扰动问题,与增量式PI控制效果进行对比实验。实验结果表明:高阶滑模控制变换器在输出负载大扰动下具有很强的鲁棒性;高阶滑模控制变换器在输入电压大扰动下同样具有很强的鲁棒性。

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