A Modelica Power System Component Library for Model Validation and Parameter Identification

Abstract

This paper summarizes the work performed in one of the work-package of the FP7 iTesla project. This work consisted in the development of a power system component library for phasor time domain simulation in Modelica. The models were used to build power system network models, used in experiments for parameter identification. The experiments were carried out with the RAPID toolbox, which has been developed at SmarTS Lab within the same project. The toolbox was written in MATLAB, making use of FMI Technologies for interacting with Modelica models.

A Fundamental Time-Domain and Linearized Eigenvalue Analysis of Coalesced Power Transmission and Unbalanced Distribution Grids using Modelica and the OpenIPSL

“…OpenIPSL models underwent software-tosoftware validation against domain-specific proprietary and open source software packages including PSS/E and PSAT (Milano, 2005). In addition, OpenIPSL is friendly to users familiar to typical power system analysis, as it addresses resistance to change-factors, associated with the use of new technologies (Vanfretti et al, 2014). OpenIPSL is still being developed in voluntary basis as an Open Source Software project on Github (http:// openipsl.org) and new features are being added.…”

Simulation of Large-Scale Models in Modelica: State of the Art and Future Perspectives

“…However, this is not always appropriate. Consider the study of power generation and transmission systems, which has recently gained interest in the Modelica community, see Vanfretti et al (2014). The models used to assess the network stability consider the dynamic phenomena taking place in the power generators, while neglecting the much faster electrical phenomena in the transmission network, which is described by algebraic equations (dynamic phasors).…”

Equation-based modeling of FACTS using Modelica

“…For the planning and operation of this complex networks, modeling and simulation are essential to satisfy operational requirements or planning constraints [1], [2]. Power system models used in time-domain simulations can be categorized into different types: Electro-Magnetic Transient type, Phasor Time Domain type or Quasi Steady State type [3], [4]. The modeling approach may also vary depending on the kind of studies to be performed or the simulation's solver.…”

“…One of the special Modelica class is the connector class, which used to inter-connect different components. The iTesla power system library uses the connector class known as PwPin [4]. This class has four variables, real voltage and current (vr and ir), and imaginary voltage and current (vi and ii).…”

“…The transmission line is already modeled in the iTesla library by its pi equivalent circuit in Modelica [4]. To implement the TCSC model, a regulated series susceptance is added with a line admittance, to control the line power flow.…”