摘要
为进一步提高逆变器滑模控制器的稳态精度,针对一种由一个双向Buck变换器和桥式换向电路组成的单Buck型逆变器进行了三阶积分滑模控制策略的研究。在其等效电路的状态空间平均法动态模型基础上,采用微分几何理论中李导数方法阐述了滑模控制器的设计,同时给出了滑模切换面系数的选取方法。分别采用传统比例微分控制策略和三阶积分滑模控制策略进行了对比实验。实验结果表明三阶积分滑模控制大幅度减小稳态终值误差,改善了系统的稳态性能,同时具有良好的动态性能,减弱控制系统的干扰和漂移。实验验证了所采用三阶积分滑模控制策略的正确性。
In order to further improve the precision of inverter sliding-mode controller,the third-order integral sliding-mode control strategy is studied for the single Buck inverter composed of a bi-directional Buck converter and a bridge-type diverter.The dynamic model of its equivalent circuit is built with state space average method,the sliding-mode controller is designed with Lie derivative method,and the selection of sliding-mode switching surface coefficients is analyzed.Experimental results show that,compared with the traditional PD control,the third-order integral sliding-mode control greatly reduces the final steady-state error,improves the system static and dynamic performances,and weakens the inter-ference and excursion,verifying its correctness.
出处
《电力自动化设备》
EI
CSCD
北大核心
2010年第9期33-37,共5页
Electric Power Automation Equipment
基金
广东省自然科学基金资助项目(05006521)~~
关键词
BUCK逆变器
三阶积分滑模控制
稳态误差
李导数
状态空间平均法
Buck inverter
third-order integral sliding-mode control
steady-state error
Lie derivative
state space average method
