Electromagnetic Transients (EMT)

PowerFactory provides an EMT simulation kernel for solving power system transient problems such as lightning, switching and temporary over-voltages, inrush currents, ferro-resonance effects or sub-synchronous resonance problems. Together with a comprehensive model library and a graphical, user-definable modelling system (DSL), it provides an extremely flexible and powerful platform for solving power system electromagnetic transient problems.

  • Integrated simulation of electromagnetic transients
    in multiphase AC and DC systems
  • Fast, fixed step size or adaptive step size algorithm
  • Simulation of static var compensations (SVC), thyristor controlled series compensations (TCSC), FACTS, STATCOM, etc.
  • Modelling of HVDC interconnections (rectifier/inverter, two-level VSC, half- and full-bridge MMC converter)
  • Power electronic devices and discrete components (diode, thyristor, PWM converter, rectifier/inverter, DC valve, soft starter, etc.)
  • Constant and frequency-dependent distributed parameter OHL models, universal frequency dependent cable model
    • OHL/Cable constants calculation
    • OHL transpositions
    • Single/multi-core and pipe-type cables
    • Cable cross-bonding
    • Semi-conducting layers
  • Non-linear elements and saturation characteristics
  • Series capacitors incl. spark gap model
  • Surge arrestor models
  • Impulse voltage & current source for lightning surge analysis
  • Support of AC-DC inter-circuit fault events
  • Accurate EMT models of renewable generation (wind/PV, etc.) and storage systems
  • Discrete R-L-C elements
  • Flexible template definition to create and re-utilise user-specific models library
  • Insulation coordination analysis including temporary (TOV), switching (SOV) and lightning (LOV) transient over-voltages
  • Stochastic switching analysis and point-on-wave (POW) switching
  • Frequency Analysis Tool, including Fast Fourier Transform (FFT) and Prony Analysis for single point in time as well as time-range assessment
  • Inrush, ferro-resonance, SSR and TRV studies
  • COMTRADE file support
  • Combined RMS and EMT simulation mode  (requires Stability Analysis functions (RMS))
  • Various options of triggering breaker closer events

DIgSILENT Simulation Language (DSL) for Dynamic EMT Modelling

  • Graphical editor for drawing any kind of block diagram
  • Fully flexible definition of simulation functions and signal wiring schemes having access to any grid object and its parameters via definition of Frames
  • Nesting of Frames and model building blocks
  • High precision built-in macros & functions
  • Automatic initialisation of complex, nonlinear models
  • Generic C interface for user-defined controller models
  • IEC61400-27-1 interface for external models
  • Automatic DSL-to-C interface converter
  • Support of MATLAB/Simulink interface
  • OPC interface1 for real-time applications
  • DSL Encryption function1

1 Diese Funktion muss separat angefragt werden.