基于改进幂次趋近律的Buck变换器滑模控制方法研究  

Research on Sliding Mode Control Method of Buck Converter Based on Improved Power Reaching Law

作　　者：姜文东 王海涛[2] 张森海 葛黄徐 周赞东[2] JIANG Wendong;WANG Haitao;ZHANG Senhai;GE Huangxu;ZHOU Zandong(State Grid Zhejiang Power Co.,Ltd.,Hangzhou 310007,Zhejiang,China;State Grid Electric Power Research Institute Wuhan Nanrui Co.,Ltd.,Wuhan 430074,Hubei,China;State Grid Zhejiang Electric Power Company Jiaxing Power Supply Company,Jiaxing 314033,Zhejiang,China)

机构地区：[1]国网浙江省电力有限公司,浙江杭州310007 [2]国网电力科学研究院武汉南瑞有限责任公司,湖北武汉430074 [3]国网浙江省电力公司嘉兴供电公司,浙江嘉兴314033

出　　处：《电气传动》2021年第5期58-63,共6页Electric Drive

基　　金：国家电网有限公司总部科技项目(521104180025,52110417000w)。

摘　　要：为进一步提高Buck变换器输出电压的快速性和稳定性,在幂次趋近律和变速趋近律基础上,提出一种基于改进幂次趋近律的滑模控制方法。该控制方法不仅提高系统动态性能,而且可以根据系统状态自适应调节滑模抖振,直至收敛于平衡点。当系统受到有界外部扰动时,滑模面及其导数能够收敛至平衡点附近的邻域内。将该滑模控制方法应用于Buck变换器三阶滑模控制器,并给出滑模面参数的选择范围。通过仿真和实验结果,证实了基于改进幂次趋近律的Buck变换器滑模控制方法的有效性。In order to further improve the rapidity and stability of Buck converter output voltage,a sliding mode control method of improved power reaching law based on power reaching law and variable speed reaching law was proposed.The control method not only improved dynamic performance of the system,but also adaptively adjusted sliding mode buffeting according to the system state until it converged to the equilibrium point.When the system was subjected to bounded external disturbances,sliding surface and its derivatives could converge into neighborhood near the equilibrium point.The sliding mode control method was applied to third-order sliding mode controller of Buck converter,and selection range of the sliding surface parameters was given.The effectiveness of the sliding mode control method for Buck converter based on improved power reaching law was verified by simulation and experimental results.

关 键 词：BUCK变换器 改进幂次趋近律 三阶滑模控制器 系统抖振 

分 类 号：TM743[电气工程—电力系统及自动化]