Modeling, analysis, and design of stationary-reference-frame droop-controlled parallel three-phase voltage source inverters Articles uri icon

authors

  • VASQUEZ, JUAN CARLOS
  • GUERRERO, JOSEP M.
  • SAVAGHEBI, MEHDI
  • ELOY-GARCIA CARRASCO, JOAQUIN
  • TEODORESCU, REMUS

publication date

  • April 2013

start page

  • 1271

end page

  • 1280

issue

  • 4

volume

  • 60

International Standard Serial Number (ISSN)

  • 0278-0046

Electronic International Standard Serial Number (EISSN)

  • 1557-9948

abstract

  • Power-electronics-based microgrids (MGs) consist of a number of voltage source inverters (VSIs) operating in parallel. In this paper, the modeling, control design, and stability analysis of parallel-connected three-phase VSIs are derived. The proposed voltage and current inner control loops and the mathematical models of the VSIs are based on the stationary reference frame. A hierarchical control scheme for the paralleled VSI system is developed comprising two levels. The primary control includes the droop method and the virtual impedance loops, in order to share active and reactive powers. The secondary control restores the frequency and amplitude deviations produced by the primary control. Also, a synchronization algorithm is presented in order to connect the MG to the grid. Experimental results are provided to validate the performance and robustness of the parallel VSI system control architecture.

keywords

  • distributed generation (dg); droop method; hierarchical control; microgrid (mg); voltage source inverters (vsis)