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.

• 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))