An Adaptive Droop Voltage Control for DC Microgrid Systems
Distributed energy resources and energy-storage units are parallel connected through converters in a DC bus microgrid.Current sharing is a basic requirement for microgrid and many current sharing methods are proposed.Distinct from those methods like the average current method,centralized method and master-slave method,the droop control method does not need any interconnections between the converters and has been widely adapted.However,in the traditional droop control,the system deals with the tradeoff between voltage regulation and current sharing,and it results in the voltage drop in case of good current sharing.In this paper,in order to improve the system performance,we propose a novel droop control method,such that the system adaptively updates the output voltage set-point for each of converters.As demonstrated with simulations,the proposed method greatly improves the output voltage regulation without significant compromise of current sharing performance.
Microgrid converter parallel operation droop method current sharing voltage control
Zhongjing Ma Wencai Jiang
School of Automation,Beijing Institute of Technology(BIT),and the National Key Laboratory of Complex School of Automation,BIT,Beijing 100081,China
国际会议
长沙
英文
4512-4517
2014-05-31（万方平台首次上网日期，不代表论文的发表时间）