电力系统自动化2026，Vol.50Issue(16)：89-99,11.DOI:10.7500/AEPS20251103019
考虑相位约束的直流配电系统小干扰稳定性分析
Small-signal Stability Analysis of DC Distribution Systems Considering Phase Constraints
摘要
Abstract
As the DC source-load equipment such as distributed photovoltaics and electric vehicles increases,the stability analysis of DC distribution systems becomes more complex,where in the DC-side impedance of a voltage-source converter(VSC)interacts with its AC-side counterpart and may cause system instability.Most existing studies on small-signal stability are only qualitative,and quantitative evaluation of system stability is rarely addressed.Taking droop-controlled DC distribution systems as the research object,this paper establishes the VSC DC-side equivalent impedance and the load-side impedance models,and further reduces the order of the DC-side equivalent impedance model.Based on the impedance-ratio forbidden-region criterion and the phase constraint condition,and with consideration of the gain margin and phase margin,a quantitative evaluation index for system stability is developed.Meanwhile,the stable intervals of the index are depicted to intuitively illustrate the influence of various parameter variations on system stability.Finally,the theoretical analysis is verified through simulation and hardware-in-the-loop experiment.关键词
直流配电系统/小干扰稳定性/等效阻抗/短路比/相位约束/稳定区间/量化评估Key words
DC distribution system/small-signal stability/equivalent impedance/short-circuit ratio(SCR)/phase constraint/stable interval/quantitative evaluation引用本文复制引用
牛猛,彭克,赵学深,颜楚阳,杜家志..考虑相位约束的直流配电系统小干扰稳定性分析[J].电力系统自动化,2026,50(16):89-99,11.基金项目
山东省自然科学基金资助项目(ZR2023ME034) （ZR2023ME034）
国家自然科学基金资助项目(52407121). This work is supported by Shandong Provincial Natural Science Foundation of China(No.ZR2023ME034)and National Natural Science Foundation of China(No.52407121). （52407121）
