直流微网中双向直流变换器的控制  

Control of Bi-Directional DC Converter in DC Micro Network

作　　者：刘晓东[1] 李飞[1] 方炜[1] 吴静[1] 刘雁飞[2] 

机构地区：[1]安徽工业大学电力电子与运动控制重点实验室,马鞍山243002 [2]皇后大学电气与计算机工程系

出　　处：《电源学报》2014年第5期40-44,共5页Journal of Power Supply

基　　金：国家自然科学基金项目(51207001);安徽省自然科学基金项目(1308085ME66)~~

摘　　要：将自适应控制与基于精确反馈线性化的滑模控制相结合应用于双向DC/DC变换器中,随着超级电容电压变化和负载的改变实时校正控制器参数。既解决了变换器的非最小相位特性和变结构特性,又能够减小系统的误差和提高系统的响应速度,更好地发挥超级电容稳定直流微网母线电压的作用。论文首先给出了变换器的状态方程,然后通过坐标变换推导出精确反馈线性化模型,并在此模型的基础上设计了自适应滑模控制器。最后利用Matlab/simulink软件进行仿真验证,并与未引入自适应的控制效果进行比较,结果表明引入自适应后的控制效果较好。Adaptive control was combined with sliding mode control based on exact feedback linearization, which was applied to the bi-directional DC/DC converter in this paper, whose parameters were corrected in real time with change of super capacitor voltages and loads. The non-minimum phase characteristics and variable structure features of the converter were solved, and the system errors were reduced and the system response speed was improved. Therefore,the proposed strategy made the ultra-capacitor play a better role on stabling bus voltage in DC micro-network. The converter state equation was proposed, and the accurate feedback linearization model through coordinate transformation was deduced and the adaptive sliding mode controller was designed on this base. Finally, the results of simulation built by Matlab/Simulink software show that the controller with the adaptive control has a better effect than the one without introducing adaptive control.

关 键 词：直流微网 超级电容 双向DC/DC 滑模控制 精确反馈线性 

分 类 号：TM46[电气工程—电器]