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
- Combined RMS and EMT simulation mode (requires Electromagnetic Transients functions (EMT))
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
- Nesting of frames and model building blocks
- DSL for fully flexible definition of simulation functions via the DSL syntax
- High precision built-in macros & functions
- Automatic initialisation of complex, nonlinear models
- Large built-in standard model library, including IEEE and CIM ENTSO-E models
- Generic C interface for user-defined controller models
- IEC61400-27-1 interface for external models
- Automatic DSL-to-C interface converter
- Support of model pre-compilation for improved performance
- Support of MATLAB/Simulink interface
- OPC interface[1] for real-time applications
- IEEE C37.118 simulation interface for PMU data streaming
- DSL Encryption function[2]
[1] This function has to be requested separately
[2] Licence for DPL/DSL/QDSL encryption required
Co-Simulation Functionality
- Single domain co-simulation (RMS balanced – RMS balanced, RMS unbalanced – RMS unbalanced)
- Multiple domain co-simulation (RMS balanced – RMS unbalanced – EMT[1])
- Co-simulation with external solver[2] (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.
[1] EMT licence required
[2] Requires separate „Co-Simulation Interface“ licence