可再生能源2025，Vol.43Issue(6)：794-803,10.
基于阻抗模型的直流微电网二次纹波协调控制策略
Secondary ripple of DC microgrid based on impedance model coordinated control strategy
摘要
Abstract
To address the double-frequency voltage pulsation issue in DC bus caused by single-phase AC loads integration in DC microgrids,this paper proposes an impedance model based coordinated control strategy for secondary ripple mitigation from the perspective of impedance modeling.Firstly,this paper analyzes the origin of the secondary ripple voltage of the DC microgrid,establishes the impedance model of each unit of the DC microgrid,and compares and analyzes the impedance and power distribution relationship of each converter at 100 Hz under the traditional control strategy.On this basis,the paper introduces band-pass and band stop filters to reshape the output impedance of each key converter at 100 Hz,so as to realize the effective suppression of secondary ripple current by energy storage converter.In order to further reduce the influence of DC bus secondary ripple voltage on uncontrollable converter and ensure the voltage quality of DC bus.The active capacitor converter is introduced to actively control the secondary ripple power by adjusting the virtual capacitance of the active capacitor,so as to suppress the secondary ripple voltage of the DC bus;Then,by drawing Bode diagram,the stability of each converter based on damping impedance control is analyzed;Finally,the effectiveness of the control strategy proposed in this paper is verified by simulation.关键词
直流微电网/二次纹波/有源电容变换器/虚拟阻抗Key words
DC microgrid/secondary ripple/active capacitor converter/virtual impedance分类
能源科技引用本文复制引用
樊斌,李学进,赫亚鹏,李欣芪,任春光,韩肖清..基于阻抗模型的直流微电网二次纹波协调控制策略[J].可再生能源,2025,43(6):794-803,10.基金项目
国家自然科学基金(51807130) （51807130）
山西省重点研发计划(202102060301012). （202102060301012）
