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

Bidragets oversatte titel: 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

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

55 Citationer (Scopus)
726 Downloads (Pure)

Abstrakt

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.
Bidragets oversatte titelDynamic Load Power Sharing Method with the Elimination of the Bus Voltage Deviation for the Energy Storage Systems in DC Micro-Grids
OriginalsprogKinesisk
TidsskriftZhongguo Dianji Gongcheng Xuebao
Vol/bind33
Udgave nummer16
Sider (fra-til)37-46
Antal sider9
ISSN0258-8013
StatusUdgivet - 2013

Emneord

  • DC microgrids
  • Distributed energy storage
  • Droop control
  • State of charge (SOC)
  • Secondary control

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