.ObjectStab
The ObjectStab package is a Modelica Library for Power Systems
Voltage and Transient stability simulations and presently contains
the following component models :
- Generators with constant frequency and voltage as slack or PV
nodes, or using 3rd or 6th
order dq-models with excitation and prime mover control
systems.
- Transmission lines in pi-link or series impedance
representation.
- Reactive power compensation devices; shunt reactors, shunt
capacitances and series capacitances according to [1].
- Fixed ratio transformers.
- On-load tap changing transformers (OLTC) modeled as detailed
discrete
models or using their corresponding continuous approximations
according
to [2].
- Static and dynamic loads, including induction motor according
to [1] and generic exponential recovery loads according to
[3].
- Buses.
- Faulted lines and buses including fault impedance.
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.
REFERENCES
[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.

Click to subscribe to objectstab
Release Notes:
- Version 1.0c (September 25, 2002) - Fixed compatibility
issues with Dymola 4.3/5.0.
- Version 1.0b (May 13, 2002) - Fixed minor bugs before
inclusion in Dymola distribution.
- Version 1.0 (February 28, 2002) - Major update,
initialization greatly enhanced using new features in Modelica
V2.0. Now uses petri net library from ModelicaAdditions
library.
- Version 0.4 (November 6, 2000) - Changed ninebus test
system to avoid 'model too complex for demo version'-error during
compilation
- Version 0.3 (November 1, 2000) - Major update, method of
initialization changed and support for variable frequency reference
using COI added
- Version 0.2 (November 15, 1999) - Fixed bug in Impedance
and Admittance Load models
- Version 0.1 (November 7, 1999)
The first version of the ObjectStab library is based on the
following subpackages:
- ObjectStab.Base
- ObjectStab.Network
- ObjectStab.Loads
- ObjectStab.Generators
- ObjectStab.Examples
- ObjectStab.petrii1 (the Dymola Petri net library
translated from the Dymola source.)
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.
Contents
Generated at 2021-01-21T02:00:13Z by OpenModelicaOpenModelica
1.17.0~dev-347-g03da1b5 using GenerateDoc.mos