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, a graphical, user-definable modelling system (DSL), and options for co-simulation, 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: line commutated converter (LCC) HVDC, two-level PWM Converter, half- and full-bridge MMC converter
  • Power electronic devices and discrete components (diode, thyristor, PWM converter, rectifier/inverter, DC valve, soft starter, etc.)
  • Support of advanced constant and frequency-dependent distributed parameter models for OHL and cables
    • Phase- and modal-domain model types
    • Parameter calculation for overhead lines and cables
    • Twisting overhead lines and cross-bonding of cables
    • Multi-phase single-/ multi-core, cable and tubular cable systems
    • Calculation of layer impedances and admittances
  • Non-linear elements and saturation characteristics, including definition of hysteresis
  • Series capacitors, including spark gap model
  • Surge arrestor models
  • Impulse voltage and current source for lightning surge analysis
  • Support of AC-DC intercircuit 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
  • Sophisticated circuit breaker modelling and switch event options: DC breaker support, TRV envelope curve, phase scatter upon switching

DIgSILENT Simulation Language (DSL) for EMT Modelling

  • Contains the DIgSLENT Simulation Language for dynamic modelling (see RMS module for details)

Co-Simulation Functionality

  • Contains Co-Simulation functionality (see RMS module for details)
  • Single and multiple domain co-simulation (RMS balanced1, RMS ­unbalanced1 – EMT)

1Requires Stability Analysis functions (RMS).

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