Electromagnetic Transients (EMT)
DIgSILENT PowerFactory provides an EMT simulation kernel for solving power system transient problems such as lightning, switching and temporary over-voltages, ferro-resonance effects or sub-synchronous resonance problems. Together with a comprehensive model library and a graphical, user-definable modelling system (DIgSILENT Simulation Language (DSL)), it provides an extremely flexible and powerful platform for solving power system electromagnetic transient problems.
Any combination of meshed 1-, 2-, and 3-phase AC and/or DC systems can be represented and solved simultaneously, from HV transmission systems, down to residential and industrial loads at LV distribution levels. Standard built-in models include:
- Lumped and distributed parameter line/cable models; constant and frequency-dependent.
- 2- and 3-winding transformers and autotransformers for 1-, 2- or 3-phase systems, including stray capacitances, tap dependent impedance and saturation effects. Flexible definition of non-linear magnetizing reactance: two-slope, polynomial, flux-current values
- Passive RLC branches, capacitor banks and filters of multiple layouts
- Surge arresters, including calculation of energy absorption
- Voltage and current, AC-, DC- sources
- Impulse sources (to be modelled via DSL)
- VT, CT and PT models, including saturation effects
- Series capacitor, including MOV and bypass switches
- Discrete power electronic components such as diodes, thyristors, IGBTs
- HVDC valve groups (6- and 12-pulse Graetz bridge configurations) and other FACTS devices such as SVCs, UPFCs, TCSCs and STATCOMs
- Synchronous and asynchronous machine, doubly-fed induction generator
- Circuit breaker models (to be modelled via DSL)
- Stochastic switching (procedures to be implemented via DPL scripts).
The package provides a powerful user-friendly graphical environment for the evaluation of simulation results characterized by:
- User-customizable plots for waveform visualisation, including filtering options, scaling, etc.
- Calculation of Fast Fourier Transform (FFT)
- Export capability to COMTRADE-Files, spreadsheet-format, CSV-files, WMF-files, etc.
