• Home|About JOPS|Editorial Board|Contact us|Chinese
HU Chao,ZHANG Xing,SHI Rongliang,LIU Fang,XU Haizhen,CAO Renxian.Improved Droop Control Strategy Based on State of Charge Balance in Islanded Microgrid[J].JOURNAL OF POWER SUPPLY,2018,16(3):70-76
Improved Droop Control Strategy Based on State of Charge Balance in Islanded Microgrid
Received:June 04, 2016  Revised:January 20, 2018
View Full Text  View/Add Comment  Download reader
DOI:10.13234/j.issn.2095-2805.2018.3.70
Keywords:microgrid  state of charge  droop control  energy storage
Fund Project:The National High Technology Research and Development Program of China (863 Program)
                 
AuthorInstitutionEmail
HU Chao School of Electrical Engineering and Automation, Hefei University of Technology, Hefei , China 61511497@qq.com
ZHANG Xing School of Electrical Engineering and Automation, Hefei University of Technology, Hefei , China
SHI Rongliang School of Electrical Engineering and Automation, Hefei University of Technology, Hefei , China
LIU Fang School of Electrical Engineering and Automation, Hefei University of Technology, Hefei , China
XU Haizhen School of Electrical Engineering and Automation, Hefei University of Technology, Hefei , China
CAO Renxian Sungrow Power Supply Co., Ltd, Hefei , China
Hits: 490
Download times: 368
Abstract:
      The control strategy for energy storage converters in islanded microgrid is studiedin this paper. The traditional droop control can share the output power, but it cannot maintain the uniformity of the state of charge(SOC) of ea-ch energy storage unit. In this paper,an improved droop control strategy is proposed:by adding the SOC adjusting module, the converter with higher SOC will deliver energy to the one with lower SOC, thus realizing the SOC balance among different units; meanwhile, the advantages of the traditional droop control, such as power-sharing and no need of communication lines, are both retained. A double-loop control model is established, and the effect of the selection of adjusting coefficients on the system performance is analyzed in detail. Finally, the effectiveness of the proposed control strategy was validated by an experimental platform of 100 kVA microgrid.
Close