南方电网技术2023，Vol.17Issue(11)：22-32,11.DOI:10.13648/j.cnki.issn1674-0629.2023.11.003
移相全桥直流变换器阻抗降阶建模及附加有源阻尼控制
Reduced-Order Impedance Modeling and Active Damping Control of Phase-Shifted Full-Bridge DC Converter
摘要
Abstract
In multi-terminal DC distribution system,due to the diversity of operating points and the complexity of impedance environ-ment,it is often difficult to provide sufficient improvement effect of stability by the active damping control with single point configuration in the converter station.In order to meet the multi-source configuration requirements of active damping in complex system,this paper takes the phase-shifted full-bridge DC converter as the research object from the perspective of load.On the basis of establishing the average equivalent circuit,the reduced-order impedance model and the transformation relation between input side and output side parallel impedances in low-frequency range,the origin of active damping control strategy using input voltage feedforward is traced,and the active damping control strategy of output voltage feedback is proposed.Finally,the dual-terminal DC distribution system is taken as the application abject,the accuracy of the reduced-order impedance model for the phase-shifted full-bridge DC converter and the effectiveness of the active damping strategy are verified by the time-domain simulation results,the small-signal eigenvalue trajectories and hardware-in-the-loop experiments.关键词
直流配电系统/移相全桥变换器/有源阻尼/降阶阻抗Key words
DC distribution system/phase-shifted full-bridge converter/active damping/reduced-order impedance分类
信息技术与安全科学引用本文复制引用
李欢,姜文伟,陈鹏伟,李昊键..移相全桥直流变换器阻抗降阶建模及附加有源阻尼控制[J].南方电网技术,2023,17(11):22-32,11.基金项目
直流输电技术全国重点实验室开放基金项目(SKLHVDC-2021-KF-10). Supported by the Open Fund of State Key Laboratory of HVDC(SKLHVDC-2021-KF-10). （SKLHVDC-2021-KF-10）
