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DY: Fachverband Dynamik und Statistische Physik
DY 51: Networks: From Topology to Dynamics – Part III (joint session DY/SOE)
DY 51.6: Vortrag
Donnerstag, 12. März 2026, 12:30–12:45, ZEU/0118
Transient stability properties for transitions between stationary power flows — •Leo Heidweiler1,2 and Frank Hellmann2 — 1TU Dresden — 2Potsdam Institute for Climate Impact Research
The increasing incorporation of renewable energy sources into electrical power grids fundamentally changes their dynamical behaviour and introduces new challenges for system stability. While network expansion and operation are traditionally based on stationary power flow analysis, dynamical effects following line faults, such as loss of synchronization of a single generator or whole part of the network, may occur even when a stable post-fault power flow exists and operational constraints are fulfilled. Direct assessment of transient stability, however, requires time-resolved simulations that are computationally expensive and unsuitable for large-scale planning and real-time applications. This motivates the question of whether transient stability properties can be inferred from static characteristics of the network, such as power flow solutions and topology.
In this work, we develop stability indicators for the IEEE39 Bus power system and investigate their predictability using PowerDynamics.jl, a Julia Library for numerical Power Grid simulations. In particular, we make use of the complex oscillator formulation of Power Systems and machine learning. This helps us assess whether stability margins can be predicted from stationary quantities alone or whether intrinsically dynamical information is indispensable. If so, we can deduce what minimal dynamical information is sufficient for reliable prediction.
Keywords: power grids; network dynamics; stability indicators; power flow; transient stability