Probabilistic Frequency Assessment.
How many hours below the inertia floor — and which zones drive them?
PFA ingests a stochastic market dispatch, computes hour-by-hour system inertia, and tests it against the inertia, frequency-response and RoCoF limits across multi-year scenarios — then maps the gap onto the network.
A year of inertia, hour by hour.
Total system inertia across the year against the statutory inertia limit and RoCoF floor. Every hour beneath the line is a security exposure to be priced and located.
From dispatch to a located inertia gap.
Stochastic profile
Ingests the market dispatch and computes system inertia hour by hour.
Five components
DG, transmission generation, demand, base and total — each plottable separately.
Three limit checks
Inertia floor, frequency-response shortfall and RoCoF (Hz/s) screened across all hours.
Zonal layer
Maps the inertia gap onto the network and ranks the best mitigation sites.
A handful of zones absorb the majority of below-floor hours — PFA flags the best synchronous-condenser and grid-forming sites, ranked by electrical distance to the deficit.