Model
Bus sections split by open breakers
Study area
County radius from the POI county
One-line, substations from the POI
Monitored elements, minimum kV
Dispatch
Generation dispatched to Pmax, branches from the POI
Dispatch level, % of Pmax
Storage while the project injects
Storage while the project withdraws
Ratings
The five posted ratings, MVA
Contingency classes judged against it
Rating applied to each contingency class
P1 single element
P2 bus or breaker fault
P4 stuck breaker
P5 protection system failure
P7 common tower
N-A-1
N-1-1
Extreme events screened against
Marginal overload band, % above rating
Screening thresholds
Minimum impact on an element
Voltage, pu
Voltage criteria applied at
Voltage judged, minimum kV
Pre-contingency voltage, pu, and the post-contingency floor and ceiling
Post-contingency voltage deviation, %
Pre-contingency band applies at
Post-contingency floor and ceiling apply at
Voltage deviation applies at
Taps, phase shifters and switched shunts
Short circuit
Reactance to the POI, pu on the project MVA
An empty box takes the default: the green mark (0.8333) for an inverter project, the case's median for a synchronous one.
Screen reach, buses from the POI
Short-circuit, system-strength and SSR screens
Fault types
Single-line-to-ground fault
GSU zero-sequence reactance, pu on the project MVA
Breaker duty checked, buses from the POI
Interrupting rating of every breaker, kA
Interrupting ratings entered per bus
Breaker duty margin, % the rating must exceed the duty by
Minimum deliverability
Minimum deliverability check Mitigation
Storage
Off-line covered units
Minimum deliverability level, % of maximum
Project components
Project configurations studied
Additional planning cases
Direction
Study-area generation dispatched to Pmax
Queued projects with a signed IA, at full output