基于超螺旋二阶滑模理论的直流微电网母线电压控制  

Bus voltage control of DC micro-grid based on super-helix second-order sliding mode theory

作　　者：吴博宁 高志强 周雪松 马幼捷 王成龙 Wu Boning;Gao Zhiqiang;Zhou Xuesong;Ma Youjie;Wang Chenglong(School of Electrical and Electronic Engineering,Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]天津理工大学电气电子工程学院,天津300384

出　　处：《电测与仪表》2023年第12期165-170,共6页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51877152)。

摘　　要：针对直流微电网系统中的负载波动、参数摄动等不确定因素造成的母线电压稳定性问题,提出了一种超螺旋二阶滑模控制策略。文中以直流微电网三相AC-DC变流器为主体,通过合理选取滑模变量,利用Super-twisting思想设计了直流微电网三相AC-DC变流器电压外环二阶滑模控制器,该控制器既保留了传统滑模的强鲁棒性,又有效地削弱了控制系统抖振;根据Lyapunov第二定律,给出了超螺旋二阶滑模的稳定性条件。通过数值仿真验证了该控制策略的可行性与正确性。Aiming at the problem of bus voltage stability caused by uncertain factors such as load fluctuation and parameter perturbation in DC micro-grid system,a super-helix second-order sliding mode control strategy is proposed in this paper.Firstly,taking the three-phase AC-DC converter of DC micro-grid as the main body,the outer voltage loop controller of three-phase AC-DC converter in DC microgrid is designed through using Super-twisting idea by reasonably selecting sliding mode variables.The controller not only retains the strong robustness of traditional sliding mode,but also effectively reduces the system chattering.Then,according to second law of Lyapunov,the stability conditions of the second-order sliding mode are given.Finally,the feasibility and correctness of the proposed control strategy are verified by numerical simulation.

关 键 词：直流微电网 二阶滑模 Super-twisting 抖振 

分 类 号：TM721.1[电气工程—电力系统及自动化]