SASKPOWER OPEN ACCESS TRANSMISSION TARIFF

SASKPOWER OPEN ACCESS TRANSMISSION TARIFFAlso, during periods of high transmission system loading (particularly during off-peak loadconditions), critical clearing times for generators and generator rotor angle stability can alsobecome a concern.Simulation Study RequirementsThe ATC must be determined for each identified interface, based on appropriate reliabilityassessments. These transfer capability studies are done by the Transmission Provider, incoordination with other affected Transmission Providers.Since SaskPower’s transmission network is sparsely distributed over a large area with weak,interconnections to other transmission areas, full positive sequence AC powerflow and dynamicssimulations are required for adequate reliability assessments. All simulations will be conductedusing the PTI (Power Technologies Inc.) PSS/E software package, with all data provided incompatible format.Powerflow simulations shall be conducted over the full range of probable operating scenarioswithin the SaskPower system. For modeling systems external to SaskPower, MAPP loadflowcases will be utilized. The powerflows are tested to determine the level of transfer that results ina constraint limited by the study criteria.Dynamics simulations shall be conducted to confirm that the levels identified by the powerflowsimulations will also meet the study criteria for dynamic system performance.Page | 117