Probabilistic Stability Assessment.
Will the machines stay in step after a fault — across every operating point?
Rotor-angle and transient-stability screening — transient stability index, small-signal damping and critical clearing time — evaluated across the scenario library at every candidate point of interconnection.
Why it matters now As inverter-based generation displaces synchronous plant, system inertia is falling and stability has become the gatekeeper on new connections — especially for converter-dominated plant and the large, concentrated loads data centres represent. A connection that passes on energy can still fail on stability. PSA screens that margin before it becomes a study-stage surprise.
Industry context, 2025 — IEA, Ember, market forecasts and a 2025 survey of 100+ energy professionals.
Post-fault, the angle either settles or runs away.
Rotor-angle response to the same disturbance under three damping conditions. PSA screens which operating points stay well-damped and which need a closer EMT look.
Screening that knows when to escalate.
TSI screen
A transient-stability index ranks every operating point on first-swing security.
Damping eigen-screen
Small-signal analysis catches poorly-damped and growing oscillatory modes.
Critical clearing time
CCT computed per POI — how long the system can tolerate the fault before instability.
EMT hand-off
Binding cases are packaged automatically for detailed PSCAD/EMT study.
Most operating points stay well-damped — PSA's job is to catch the few that don't, and escalate only those to detailed EMT study.
Brief us on a project.
Send a one-paragraph scope — the system, the codes that apply, and the question you need answered. We typically reply within two working days.
Related: Consultancy · EMT & grid-code compliance · Velon Suites · LumiMerse
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