IEEE PES General Meeting presentation
A presentation on the Dynaωo approach is scheduled at the next IEEE PES General Meeting conference, that will be held virtually during August 2020. The presentation is included into a very nice panel session on “Numerical challenges in multi-energy simulations” and is entitled “Speed-up of Modelica based large-scale simulations, the example of the open-source tool Dynaωo”. It explains the main principles of the approach before going into more details on the advanced strategies used in Dynaωo to reach performances compatible with an industrial use. If you have registered for the conference, the presentation is available here.
Dynaωo v1.2.0 release
Dynaωo’s new version - V1.2.0 - has been released on July, the 31st. It notably includes the release of steady-state calculation models (restorative load, generators, frequency regulation model - SignalN -, HVDCTanPhi and HVDCPV), the creation of an examples directory with associated documentation and additional test cases, an important effort leading to a 20 % improvement on performances for large-scale test cases (variables simplification, algorithm optimization and implementation improvements) and a better modeling robustness (bad topology handling, propagation of disconnection signals, etc.).
In addition to these new features, new models and test cases are also available in the Dynaωo library:
- HVDC Standard model
- Shackshaft saturation model
- Full OpenModelica grid forming converters and HVDC test cases
Dynaωo becomes a suite of simulation tools
Dynaωo ‘s primary focus has been on long-term and short-term stability studies but the very encouraging results obtained and the flexibility of the approach led to an extension of the initiative. Dynaωo is now evolving towards a complete and coherent suite of simulation tools, sharing the same philosophy:
- DynaFlow for steady-state calculations
- DySym for short-circuit calculations
- DynaWaltz for long-term stability simulations
- DynaSwing for short-term stability studies
- DynaWave for stability studies and system design with a high-penetration of power-electronics based components (quasi-EMT)
Two presentations related to the use of Modelica for power system simulations were done during the last OpenModelica workshop, held in Linköping on February the 3rd.
A presentation on the use of OpenModelica DAE mode in collaboration with TU Bielefeld. The DAE mode is a compilation mode in OpenModelica that prevents the compiler to transform the original DAE system written by the user into an ODE system for the numerical resolution. In particular, as shown by the examples provided into the presentation, for large scale simulations of electro-mechanical power system, this transformation lead to large algebraic loops, resulting in performances issues.
A presentation with Dynamica of the PowerGrids library, an open-source Modelica library developed for simulations of power systems with full Modelica environments (such as OpenModelica or Dymola). This library is complementary to Dynaωo library and follows the same high-level principles: it will serve to experiment and develop models, especially at the research stage, before they are integrated to the official stable Dynaωo library.