Stability Analysis Functions (RMS)

The RMS simulation tool in PowerFactory can be used to analyse mid-term and long-term transients under both balanced and unbalanced conditions, incorporating a simulation scan feature.  DIgSILENT Simulation Language (DSL) is used for model definition, and a large library of IEEE standard models is available. Flexible co-simulation options are also available.

  • Multi-phase AC networks, DC networks
  • Support of balanced and unbalanced grid conditions
  • Fast, fixed step size and adaptive step size algorithm
  • A-stable numerical integration algorithms supporting long-term stability simulations with integration step sizes ranging from milliseconds to minutes, individually selectable for each model
  • High precision event and interrupt handling
  • Simulation of any kind of fault or event
  • Transient motor starting (synchr./asynchr. machines)
  • Support of all protection library relays
  • Real-time simulation mode
  • Simulation scan feature, e.g. frequency scan, loss of synchronism scan, synchronous machine speed scan, voltage-/voltage recovery scan, fault ride through scan or common variable scan
  • Frequency Analysis Tool, including Fast Fourier Transform (FFT) and Prony Analysis for single point in time as well as time-range assessment
  • Frequency Response Analysis tool for dynamic models with Bode/Nyquist plots

DIgSILENT Simulation Language (DSL) for Dynamic RMS Modelling

  • Graphical editor for drawing any kind of block diagram (AVR, prime mover, relay, etc.)
  • Fully flexible signal wiring schemes having access to any grid object and their parameters via definition of Frames
  • Support of vector signals and signal multiplexing
  • Nesting of frames and model building blocks
  • Fully flexible definition of simulation functions via the DSL syntax
  • High precision built-in macros & functions
  • Automatic initialisation of complex, non-linear models
  • Configuration scripts for initialisation using DPL
  • Large built-in standard model library, including IEEE and CIM ENTSO-E models
  • Generic C interface for user-defined controller models
  • IEC61400-27-1 Ed. 1 Appendix F DLL based interface for external models
  • Automatic DSL-to-C interface converter
  • Support of model pre-compilation for improved performance
  • OPC interface1 for real-time applications
  • IEEE C37.118 simulation interface for PMU data streaming
  • DSL Encryption function2

Co-Simulation Functionality

  • Single domain co-simulation (RMS balanced – RMS balanced, RMS unbalanced – RMS unbalanced)
  • Multiple domain co-simulation (RMS balanced – RMS unbalanced – EMT3)
  • Co-simulation with external solver4 (e.g. third party power systems ­simulation program) via IEEE C37.118 communication interface
  • Computing supported as built-in for increased performance
  • Both accurate (implicit) and fast (explicit) co-simulation methods ­available
  • Easy to define co-simulation border using boundary objects
  • Any number of co-simulation regions can be defined
  • Co-simulation of networks split by regions depending on any criteria: localisation, voltage levels, etc.

1This function has to be requested separately
2Licence for DPL/DSL/QDSL encryption required
3EMT licence required
4Requires separate „Co-Simulation Interface“ licence