articleIEEE Transactions on Power ElectronicsJun 13, 2013GREEN OA

An Improved Droop Control Method for DC Microgrids Based on Low Bandwidth Communication With DC Bus Voltage Restoration and Enhanced Current Sharing Accuracy

XLXiaonan LuJMJosep M. GuerreroKSKai SunJCJuan C. Vásquez

Tsinghua University · Aalborg University

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Abstract

Droop control is the basic control method for load current sharing in dc microgrid applications. The conventional dc droop control method is realized by linearly reducing the dc output voltage as the output current increases. This method has two limitations. First, with the consideration of line resistance in a droop-controlled dc microgrid, since the output voltage of each converter cannot be exactly the same, the output current sharing accuracy is degraded. Second, the dc-bus voltage deviation increases with the load due to the droop action. In this paper, in order to improve the performance of the dc microgrid operation, a low-bandwidth communication (LBC)-based improved droop control method is proposed. In…

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Topics & keywords

Topics
Keywords
  • Voltage droop
  • Bandwidth (computing)
  • Current (fluid)
  • Electronic engineering
  • Electrical engineering
  • Voltage
  • Voltage drop
  • Computer science
UN Sustainable Development Goals
  • Affordable and clean energy
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