电工技术学报  2016, Vol. 31 Issue (21): 12-20    DOI:
电力系统及其自动化 |
基于精确线性化理论的超级电容储能系统的非线性控制算法
李轩,李永丽,常晓勇
智能电网教育部重点实验室天津大学 天津 300072
Nonlinear Control Algorithm for Super Capacitor Energy Storage System Based on Exact Linearization Theory
Li Xuan,Li Yongli,Chang Xiaoyong
Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin 300072 China
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摘要 针对超级电容及DC-DC电路的非线性特性,设计了超级电容储能系统的非线性控制算法。通过分析电路的工作状态,建立了电路仿射非线性系统标准型,利用状态反馈精确线性化理论推导出电路状态量与占空比函数间的关系,进而设计相应控制算法,并证明了系统的内动态稳定性,实现了超级电容恒流充电与恒压放电的控制目标。在Matlab/Simulink仿真平台中搭建仿真模型,对所提控制算法进行验证,并在实验室中搭建实验电路,比较了非线性控制算法与PI算法的控制效果。结果表明,在超级电容储能系统中采用非线性控制算法相比于传统PI算法能明显提高系统的动态性能,保证系统稳定运行。
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李轩
李永丽
常晓勇
关键词 超级电容储能系统非线性控制状态变量反馈精确线性化    
Abstract:In view of the nonlinear characteristics of super capacitors and DC-DC converters,a nonlinear control algorithm for the super capacitor energy storage system is designed.Through the analysis on working states of the circuit,the affine nonlinear model is established.The relationship between the circuit state and the duty cycle is deduced by using the exact feedback linearization theory.Furthermore,the control algorithm is designed and its stability of internal dynamics is proved.Then the control targets of charging with constant current and discharging with constant voltage are achieved.Simulation model is constructed in the Matlab/Simulink platform.The effectiveness of the control algorithm is confirmed.Then,the difference between the nonlinear control algorithm and the PI control method is compared by experimental circuit building in laboratory.Results show that,compared with the traditional PI algorithm,using nonlinear control law in the super capacitor energy storage system can significantly improve dynamic performance and ensure stability.
Key wordsSuper capacitor    energy storage system    nonlinear control    state variables feedback    exact linearization   
收稿日期: 2015-06-04      出版日期: 2016-11-21
PACS: TM46  
基金资助:国家重点基础研究发展计划(973计划)(2009CB219704)、国家自然科学基金(51177108)和高等学校博士学科点专项科研基金(20110032110066)资助项目。
作者简介: 李轩 男,1990年生,硕士研究生,研究方向为电力系统保护与控制。E-mail:lixuanyeah@126.com (通信作者)李永丽 女,1963年生,教授,博士生导师,研究方向为电力系统保护与控制。E-mail:lyltju@163.com
引用本文:   
李轩,李永丽,常晓勇. 基于精确线性化理论的超级电容储能系统的非线性控制算法[J]. 电工技术学报, 2016, 31(21): 12-20. Li Xuan,Li Yongli,Chang Xiaoyong. Nonlinear Control Algorithm for Super Capacitor Energy Storage System Based on Exact Linearization Theory. Transactions of China Electrotechnical Society, 2016, 31(21): 12-20.
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