测试科学与仪器2025，Vol.16Issue(3)：415-424,10.DOI:10.62756/jmsi.1674-8042.2025040
铁路领域光伏发电单元改进的虚拟直流发电机技术
Improved virtual DC generator technique for PV power generation units in railway field
摘要
Abstract
The power-electronics-based DC microgrid system composed of new energy sources in railway field has low inertia,weak damping characteristics,and the voltage fluctuation microgrid systems caused by the power disturbance of solar.In order to improve the inertia of the DC microgrid system,a virtual DC generator technology is adopted in the interface converter of photovoltaic(PV)power generation unit,so that it has the external characteristics of DC generator.However,the influence of PV maximum power point tracking(MPPT)is not considered in the traditional virtual DC generator control.Therefore,an improved control strategy for virtual DC generator is proposed,and its small signal model is established to analyze the influence of inertia and damping coefficient on stability.The results show that the proposed method effectively weakens the impact on DC bus voltage when the output of PV power unit changes suddenly,which improves the stability of the microgrid.Meanwhile,the correctness and feasibility of the method are verified.关键词
可再生能源/光伏发电系统/电力电子化直流微网系统/虚拟直流发电机控制/虚拟惯性Key words
renewable energy/photovoltaic(PV)system/power-electronics-based DC microgrid system/virtual DC generator control/virtual inertia引用本文复制引用
赵峰,肖成锐,陈小强,王英..铁路领域光伏发电单元改进的虚拟直流发电机技术[J].测试科学与仪器,2025,16(3):415-424,10.基金项目
This work was supported by National Natural Science Foundation of China(No.52067013),Natural Science Foundation of Gansu Province(No.20JR5RA395),and Tianyou Innovation Team of Lanzhou Jiaotong University(No.TY202010). （No.52067013）
