PSAPillar 03 · System Security

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.

Transient stability indexSmall-signal dampingCritical clearing timePer-POI screening
Per POIStability screening
CCTCritical clearing time
EigenDamping screen
EMTHand-off prepared
The signature output

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.

Rotor-angle response · post-fault swing · representative contingency
Marginal and growing-oscillation cases are flagged for detailed EMT — the PSCAD hand-off is prepared automatically.
Inside the engine

Screening that knows when to escalate.

01

TSI screen

A transient-stability index ranks every operating point on first-swing security.

02

Damping eigen-screen

Small-signal analysis catches poorly-damped and growing oscillatory modes.

03

Critical clearing time

CCT computed per POI — how long the system can tolerate the fault before instability.

04

EMT hand-off

Binding cases are packaged automatically for detailed PSCAD/EMT study.

The read

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.