大扰动Buck-Boost变换器的鲁棒高阶滑模控制  

A Robust High Order Sliding Mode for Buck-Boost Converters With Large Disturbances

作　　者：吴宇[1] 皇甫宜耿[2] 张琳[2] 周雒维[1] 

机构地区：[1]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆市沙坪坝区400044 [2]西北工业大学自动化学院,陕西省西安市710072

出　　处：《中国电机工程学报》2015年第7期1740-1748,共9页Proceedings of the CSEE

基　　金：国家自然科学基金重点项目(51137006);教育部博士点新教师基金(20126102120050);陕西省国际科技合作重点项目计划(20121203202758)~~

摘　　要：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。During the process of renewable energy power generation, the frequently intermittent input and load disturbance require power converters of stronger robustness. The traditional sliding mode controller（SMC） has inevitable chattering phenomenon due to its discrete control law. In order to solve the above problems, this paper designed an avoidance chattering and strong robust converter based on the high order sliding mode control（HOSMC）. The digital signal processor（DSP） TMS320F28035 was used as the core chip. To solve the intermittent disturbance in the random renewable energy power generation, this paper studied on the dynamic features and stability of the converter controlled by a HOSM algorithm ＂super-twisting＂. And the effectiveness was illustrated through the experiments compared with the PI controllers. The experimental results show that, under the large disturbances in output, the converter controlled by the super-twisting sliding mode has stronger robustness and higher precision; The same situation also appeared under the large disturbances in input.

关 键 词：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 

分 类 号：TM46[电气工程—电器]