Open-source distribution transient modeling with Modelica

Modelica is a relatively new multi-domain simulation language that is well suited to modeling power system transients. This paper gives an introduction to Modelica for distribution system applications with some examples. Overhead line models are given as an example of using Modelica for developing components. An interface to Modelica simulations through R, an open-source processing environment, allows for plotting, parameter sweeps, component optimization, and Monte Carlo analysis.