直流微电网储能系统中带有母线电压跌落补偿功能的负荷功率动态分配方法

Translated title of the contribution: Dynamic Load Power Sharing Method with the Elimination of the Bus Voltage Deviation for the Energy Storage Systems in DC Micro-Grids

Xiaonan Lu, Kai Sun, Lipei Huang, Xi Xiao, Josep M. Guerrero

Research output: Contribution to journalJournal articleResearchpeer-review

58 Citations (Scopus)
743 Downloads (Pure)

Abstract

In order to take advantage of the dispersed energy storage units in the DC micro-grids, an improved state of charge (SOC) based droop control method for energy storage systems was proposed in this paper. Dynamic load power sharing among different energy storage units was achieved by using this method. Specifically, the coefficient in the conventional droop control method was set to be inversely proportional to the nth order of SOC. The speed of SOC and output power equalization can be adjusted by changing the exponent n of SOC. Since the above method was realized based on droop control, the deviation in the DC bus voltage was involved. Secondary control method was employed in this paper in order to restore the bus voltage to its reference value. The conventional secondary control was used for the droop control method with constant droop coefficient. In the above improved droop control method, the droop coefficient was changed by the SOC. It acted upon secondary control as a disturbance. In this paper, the feasibility of secondary control for the SOC-based droop control method was tested. The model of the overall control system was obtained and the system stability was thereby studied based on it. Simulation validation was realized by Matlab/Simulink and a 2×2.2 kW prototype based on dSPACE1103 was implemented for the experimental demonstration.
Translated title of the contributionDynamic Load Power Sharing Method with the Elimination of the Bus Voltage Deviation for the Energy Storage Systems in DC Micro-Grids
Original languageChinese
JournalZhongguo Dianji Gongcheng Xuebao
Volume33
Issue number16
Pages (from-to)37-46
Number of pages9
ISSN0258-8013
Publication statusPublished - 2013

Keywords

  • secondary control
  • DC microgrids
  • distributed energy storage
  • droop control
  • state of charge (SOC)

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