非隔离双向直流变换器反步滑模控制方法研究  

Research on Backstep Sliding Mode Control Method for Non-isolated Bidirectional DC Converter

作　　者：吕伟嘉[1] 卢静雅 刘旭[2] Lv Weijia;LU Jingya;LIU Xu(Electric Power Research Institute,State Grid Tianjin Electric Power Company,Tianjin 300000,China;College of Optical and Electronical Information,Changchun University of Science and Technology,Changchun 130000,China)

机构地区：[1]国网天津市电力公司电力科学研究院,天津300000 [2]长春理工大学光电信息学院,长春130000

出　　处：《电源学报》2023年第3期63-69,共7页Journal of Power Supply

基　　金：国网天津市电力公司科技资助项目(KJ19-1-40)。

摘　　要：由于直流电网中直流母线电压的变化对储能系统的运行有干扰,且储能系统采用双向直流变换器调控直流母线电压时会产生严重的非线性问题,导致母线电压不稳定。因此提出非隔离双向直流变换器反步滑模控制方法,构建非隔离双向四端口直流变换器拓扑结构。该变换器采用单向和双向两种工作模式,且采用互补PWM控制方法控制双向直流变换器工作流程,并通过反步滑模变换器结构控制器,确保非隔离双向直流变换器在确定性差、非线性和外围影响状况下的稳定运行。实验验证该方法有效实现了非隔离双向直流变换器反步滑模控制,确保直流母线电压保持稳定,且方法具有较高的鲁棒性。Due to the interference to the operation of an energy storage system caused by the change in DC bus voltage in DC grid and the serious nonlinear problems when the energy storage system uses a bidirectional DC converter to regulate the DC bus voltage,the instability of bus voltage will occur.Therefore,a backstep sliding mode control method for a non-isolated bidirectional DC converter is proposed in this paper,and a non-isolated bidirectional four-port DC converter topology is built.This converter adopts two kinds of working mode,i.e.,single phase and two-way,and the complementary PWM control method is used to control the working process of the bidirectional DC converter.In addition,through the backstep sliding mode controller,the stable operation of the non-isolated bidirectional DC converter under the conditions of uncertainty,nonlinearity and peripheral effect are guaranteed.Experimental results show that the proposed method efiectively realized the backstep sliding mode control of the non-isolated bidirectional DC converter and ensured the stable DC bus voltage,with a strong robustness.

关 键 词：直流母线电压 双向直流变换器 储能系统 反步滑模控制 PWM控制方法 Lyapunov镇定函数 鲁棒性 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]