安徽大学学报（自然科学版）2025，Vol.49Issue(2)：56-67,12.DOI:10.3969/j.issn.1000-2162.2025.02.007
基于大信号稳定的直流微电网Buck变换器自适应无源控制策略
An adaptive passivity-based control of buck converter for direct current microgrids with large-signal stability
摘要
Abstract
Due to the negative impedance characteristic of constant power load,the constant power load becomes one of the main factors threatening the stable operation of direct current microgrid system.To eliminate the negative impedance characteristics of constant power load and the source-load uncertainty to the stable operation of buck converter for direct current microgrid,an adaptive passivity based control strategy is proposed in this article,which is based on the passive control theory,and the virtual impedance technique is used to optimize and adjust the impedance of the system so that the whole system is in a passive and stable state.For the steady-state error caused by the deviation from the rated operating state due to the uncertainty of the system,this article designed higher-order disturbance observer to feed-forward compensate the steady-state error caused by the uncertainty at the source-load,thus ensuring the stable and error-free operation of the system under the disturbance and uncertainty conditions.In addition,to ensure the large-signal stability of proposed control strategy,the mixed potential theory is used for stability analysis and parameter selection criteria are provided.Moreover,the article also verified the effectiveness and superiority of proposed control strategy is simulated by Matlab/Simulink simulation platform.关键词
直流微电网/恒功率负载/Buck变换器/无源控制/大信号稳定Key words
direct current microgrid/constant power load/buck converter/passivity based control/large-signal stability分类
动力与电气工程引用本文复制引用
郑城市,刘洋,李健,翟波,王盼宝..基于大信号稳定的直流微电网Buck变换器自适应无源控制策略[J].安徽大学学报（自然科学版）,2025,49(2):56-67,12.基金项目
国网河南省电力公司科技合作项目(5217D0230001) （5217D0230001）
国家自然科学基金资助项目(52377173) （52377173）
