Please be advised of the following notices:
1) Due to the ongoing COVID-19 pandemic response there may be delays in processing physical copies of documentation. Please use the contact details above for the Interconnection Engineer to determine suitable submission arrangements.
2) Due to ongoing development discussions and engineering studies, the Transmission System Network Upgrades identified as part of Transmission Service Request #411 will not be included in the System Impact Study (SIS) Analysis for Generator Interconnection Procedures (GIP) Study Groups #32 and #33. GIP Study Group #32 and #33 analysis will be limited to the 2022 Transmission System configuration plus any material Network Upgrades identified in higher queued projects.
3) Due to the expected increase in inverter-based generation resources in Nova Scotia and the anticipated decrease in synchronous generation related to the requirement to phase-out of coal fired generation by 2030, GIP System Impact Study analyses are being expanded to include Electromagnetic Transient (EMT) Analysis in addition to Load Flow and Dynamic Analysis. To accommodate this change, Interconnection Customers are required to provide the System Operator with the appropriate PSCADTM models for their generators in addition to the PSS®E generator models required in the Generator Interconnection Procedures. A separate report will be issued for the Electromagnetic Transient Analysis.
4) Grid Code Requirement 7.6.7: Inertia Response – WECS
WECS Generating Facilities shall support short-duration frequency deviations by providing inertia response equivalent to a Synchronous Generator with an inertia factor (H) of at least 3.0 MW- s/MVA for a period of at least 10 seconds.
With the next round of wind coming online, NSPI has identified a need for grid support to arrest the rate of change of frequency following a system disturbance when the energy dispatch is predominantly wind.
NSPI will consider the following as an alternative to meet Grid Code Requirement 7.6.7:
For Round 32, WEC Generating Facilities may propose a mix of inertia and Fast Frequency Response (FFR) to an equivalent of 3.0 MW- s/MVA. The FFR response time will be at full response in less than 200ms and be sustained for at least 2 seconds. The FFR equivalent can be determined in the System Impact Study stage.
*End of Notice*