基于滑模变结构控制的级联式双向DC/DC变换器

目前,级联式双向直流变换器的工作性能受到传统的线性控制方法制约。滑模变结构控制具有动态响应快、鲁棒性强等优良特性,是解决这一问题的突破口。根据系统升降压变换的工作原理建立相应的数学模型,设计了升压变换时的滑模电流控制器和降压变换时的滑模电压控制器。仿真结果表明,滑模控制器的动态性能和鲁棒性均强于传统的线性控制器。采用滑模变结构控制的控制策略具有可行性,并对提高变换器的工作性能提供了一定的借鉴作用。

Cascading Bidirectional DC/DC Converter Based on Sliding Mode Variable Structure Control

At present, the performance of cascading bidirectional DC/DC converter was restricted by the traditional linear control methods. Sliding mode variable structure control was the breakthrough to solve this problem, which had the excellent characteristics, such as fast dynamic response, strong robustness. The corresponding mathematical models were set up according to the working principle of system, the sliding mode current controller when the conversion was in boost mode and the sliding mode voltage controller when the conversion was in buck mode were designed. The results of Simulink simulation show that the dynamic performance and robustness of sliding mode controller are better than the traditional liner controller, the control strategy based on sliding mode variable control has a certain feasibility, and the reference function for improving the performance of the converter are provided.