A Nonlinear Boundary Controller for Buck Converters Feeding Constant-Power Loads
作者单位：Department of System Science and EngineeringCollege of Electrical EngineeringZhejiang University School of Information and Electrical EngineeringZhejiang University City College
会议名称：《第36届中国控制会议》
主办单位：Dalian University of Technology;Systems Engineering Society of China (SESC);Technical Committee on Control Theory (TCCT), Chinese Association of Automation (CAA)
会议日期：2017年
学科分类：0711[理学-系统科学] 07[理学] 08[工学] 070105[理学-运筹学与控制论] 081101[工学-控制理论与控制工程] 071101[理学-系统理论] 0811[工学-控制科学与工程] 0701[理学-数学]
基 金：supported by grants from the National 863 Program of China(2015AA050104) the National Natural Science Foundation of China(61374174,61573314) the Zhejiang Province Natural Science Fund(LY14F030003) the Research Project of the State Key Laboratory of Industrial Control Technology(ICT1606) the science and technology project of SGCC(SGZJ0000BGJS1600312)
关 键 词：Boundary control Nonlinear systems Buck converters Constant-Power Load(CPL)
摘 要：Constant-Power Load（CPL） introduces destabilizing effect to dc-dc converters, which may lead to voltage oscillation or collapse. To mitigate the destabilizing problem brought by CPL, a nonlinear boundary controller is proposed in this paper,which has a nonlinear switching line. The converters’ dynamics on the state space plane is analyzed through phase portrait. The proposed controller is verified by simulation tests in MATLAB/Simulink for controlling the output voltage of a buck converter with CPL.