A unified dynamic characterization framework for microgrid systems

Brian Johnson, Ali Davoudi, Patrick Chapman, Peter Sauer

Research output: Contribution to journalArticlepeer-review


A systematic, automatable, unified methodology is presented for the modeling of non-linear large-signal dynamics and eigenvalue analysis of microgrid systems. Unlike nodal-based simulators and typical state-variable methods that require Kirchhoff's current law analysis, a state-space model is systematically derived from the netlist of the equivalent qd microgrid circuit model. The model may be used to conduct time-domain simulations and analyze system response to large transients. Additionally, system eigenvalues may be analyzed with respect to inverter control gains and system parameters to assess small-signal stability and sensitivity. The dynamic model is verified against existing experimental results, and small-signal stability results are presented.

Original languageEnglish (US)
Pages (from-to)93-111
Number of pages19
JournalElectric Power Components and Systems
Issue number1
StatePublished - Nov 22 2011
Externally publishedYes


  • microgrid
  • power system control
  • power system dynamics
  • power system stability
  • simulation

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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