直流微网中双向直流变换器的控制

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。

Control of Bi-Directional DC Converter in DC Micro Network

Adaptive control is combined with sliding mode control based on exact feedback linearization is applied to the bi-directional DC/DC converter in this paper, whose parameters are corrected in real time with change of super capacitor voltages and loads. The non-minimum phase char-acteristics and variable structure features of the converter are solved, the system errors are reduced and the system response speed is improved. Therefore, the proposed strategy makes the ultra-capacitor play a better role on stabling bus voltage in DC micro-network. The paper presents the converter state equation, deduces the accurate feedback linearization model through coordinate transformation and designs the adaptive sliding mode controller 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.