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Open-Source Tools for Transient Modeling
Tom Short [email protected]
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IEEE Flash IEEE PES Lightning Performance of Overhead Lines
Working Group
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OpenETran
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Modelica Landscape
• Modelica - Open modeling language
• Modelica standard library
• Modelica tools
Modelica.org
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Modelica Standard Library
• Open-source library of models
– Electrical
– Electronic
– Mechanical
– Thermal
– Control systems
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Modelica Tools
• Commercial
– Dymola
– MapleSim
– Wolfram SystemModeler
• Open source
– OpenModelica
– JModelica
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FREE book by Michael Tiller
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Surge Arrester Model
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model Exponential "Simple arrester model "
extends Modelica.Electrical.Analog.Interfaces.OnePort;
parameter Modelica.SIunits.Voltage
Vdischarge(final min=0) = 30.E3
"10-kA discharge voltage";
parameter Real Exponent(final min=1) = 26
"Exponent coefficient";
equation
i = sign(v) * (v / Vdischarge)^Exponent * 10000;
annotation (...);
end Exponential;
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OpenModelica
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Models in a Browser
• OpenModelica
– Compiles Modelica to C
• Emscripten
– Compiles C to JavaScript (asm.js)
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Innovative Uses for Modelica
• Simulations on the internet/intranet
• Hardware in the loop simulations
• Batch simulations with R, Python, or Matlab
• Optimization of model parameters
• Use models in Simulink
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Modelica Work Still to do
• More models
– Frequency-dependent line models
• More industry usage and case studies
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More information
• IEEE Flash / OpenETran
– http://www.ewh.ieee.org/soc/pes/lpdl/
– http://sourceforge.net/projects/ieeeflash/
– http://sourceforge.net/projects/epri-openetran/
• Modelica
– http://modelica.org
– http://openmodelica.org
– http://distributionhandbook.com
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http://www.ewh.ieee.org/soc/pes/lpdl/http://sourceforge.net/projects/ieeeflash/http://sourceforge.net/projects/epri-openetran/http://sourceforge.net/projects/epri-openetran/http://sourceforge.net/projects/epri-openetran/http://modelica.org/http://openmodelica.org/http://distributionhandbook.com/
