南方电网技术2025，Vol.19Issue(7)：103-111,130,10.DOI:10.13648/j.cnki.issn1674-0629.2025.07.008
基于改进下垂控制的直流微电网稳定性判据
Stability Criterion of DC Microgrid Based on Improved Droop Control
摘要
Abstract
To address the issues of uneven output current distribution and voltage drop in energy storage unit converters under traditional droop control,an improved scheme is proposed.Firstly,an AC small-signal disturbance is introduced on the basis of traditional droop control to formulate a frequency-current composite droop control strategy,achieving precise proportional current distribution among distributed power converters in DC microgrids.Secondly,the large-signal stability criterion for microgrids under the improved droop control is derived based on mixed potential function theory.Finally,MATLAB/Simulink simulations demonstrate that the proposed frequency droop control strategy effectively achieves accurate current distribution in converters while validating the correctness and effectiveness of the stability criterion.Additionally,the critical range for sudden increases in constant power loads and the feasible domain for voltage controller parameters are determined for specific DC microgrid structural parameters.关键词
直流微电网/叠加频率/下垂控制/混合势函数/稳定性判据Key words
DC microgrid/superimposed frequency/droop control/mixed potential function/stability criterion分类
信息技术与安全科学引用本文复制引用
李秋良,汤赐,杨杰,王振中,周诗卉,罗敏,王佳怡..基于改进下垂控制的直流微电网稳定性判据[J].南方电网技术,2025,19(7):103-111,130,10.基金项目
国家自然科学基金资助项目(51977013) （51977013）
湖南省自然科学基金资助项目(2017JJ2265).Supported by the National Natural Science Foundation of China(51977013) （2017JJ2265）
the National Natural Science Foundation of Hunan Province(2017JJ2265). （2017JJ2265）
