The ObjectStab package is a Modelica Library for Power Systems Voltage and Transient stability simulations and presently contains the following component models :

Standard assumptions for multi-machine transient stability
simulations are made, i.e., generator stator and network time constants are neglected and voltages and currents are assumed to be sinusoidal and symmetrical. Except where other references are given, the components are modeled according to the guidelines given in [1]. 

The component library has been validated using comparative simulations with EUROSTAG [4]. The library has been developed and tested using DYMOLA version 5.0, 2002-09-19, however it should work with any versions higher than 4.2a.


[1] J. Machowski, J.W. Bialek, and J.R. Bumby, Power System Dynamics and Stability, Number ISBN 0-471-97174. Wiley, 1993.

[2] P.W. Sauer and M.A. Pai, "A comparison of discrete vs. continuous dynamic models of tap-changing-under-load transformers", in Proceedings of NSF/ECC Workshop on Bulk power System Voltage
Phenomena - III : Voltage Stability, Security and Control
,  Davos, Switzerland, 1994.

[3] D. Karlsson and D.J. Hill, "Modelling and identification of nonlinear dynamic loads in power systems'', IEEE Transactions on Power Systems, vol. 9, no. 1, pp. 157-163, February 1994.

[4] J. Deuse and M. Stubbe, "Dynamic simulation of voltage collapses", IEEE Transactions on Power Systems, vol. 8, no. 3, pp. 894-904, August 1993.

Main Author:

Mats Larsson.
The ObjectStab logotype was designed by Thomas Stendahl.

If you are a user of the ObjectStab library, please join the ObjectStab mailing list at Yahoo groups to receive information about updates and common usage problems. If you do not yet have an Yahoo groups ID you will first have to register.

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Release Notes:

The ObjectStab package is free software; it can be redistributed and/or modified under the terms of the Modelica license and the accompanying disclaimer.

Copyright (C) 1999-2002, Mats Larsson.


 BaseBase package
 GeneratorsGenerator subpackage
 LoadsLoads subpackage
 NetworkNetwork subpackage

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