24 Flow Reservation : Storage DER requests either charge or discharge of ICT: Utility or REP H Flow Reservation Storage DER requests defined amount of energy (kWh) starting at a is initiated by the either charge or defined time and completing by a defined time at a Storage DER. discharge rate not exceeding a defined charge or discharge Other immediate power level. Utility responds with an authorized charge/discharge energy transfer, start time, and maximum power functions based level. The utility can update the response on IEC 61850 periodically to modulate the power flow during INV4 are initiated transfer, but cannot change from discharging to by Utility. (IEEE charging, or the reverse, without a new flow 2030.5 SEP2) reservation request by the storage unit. Scheduling and Forecasts 25 Schedule output at PCC: The utility establishes (or pre-establishes) a schedule Autonomous H O H-O Larger DERs or Schedule actual or (e.g. on-peak & off-peak) of actual or maximum real multiple DERs Local: Monitor real maximum real power output levels at the ECP or PCC, possibly within a facility power output at ECP or output at specific times combining generation, storage, and load PCC. management. The reason might be to minimize ICT: Utility updates the output during low load conditions while allowing or schedule of actual or requiring higher output during peak load time maximum real power periods. values The DER system receives and follows schedules for H O M Recommended 26 Schedule DER Functions: Autonomous Schedule real power and real power settings, reactive settings, limits, modes for all DER ICT: Utility, REP, or ancillary service outputs (such as autonomous volt/var, frequency-watt), and systems but may FDEMS issues schedules other operational settings. not always be to DER system activated
24 Flow Reservation : Storage DER requests either charge or discharge Storage DER requests either charge or discharge of defined amount of energy (kWh) starting at a defined time and completing by a defined time at a rate not exceeding a defined charge or discharge power level. Utility responds with an authorized energy transfer, start time, and maximum power level. The utility can update the response periodically to modulate the power flow during transfer, but cannot change from discharging to charging, or the reverse, without a new flow reservation request by the storage unit. ICT: Utility or REP H Flow Reservation is initiated by the Storage DER. Other immediate charge/discharge functions based on IEC 61850 INV4 are initiated by Utility. (IEEE 2030.5 SEP2) Scheduling and Forecasts 25 Schedule output at PCC: Schedule actual or maximum real power output at specific times The utility establishes (or pre-establishes) a schedule (e.g. on-peak & off-peak) of actual or maximum real output levels at the ECP or PCC, possibly combining generation, storage, and load management. The reason might be to minimize output during low load conditions while allowing or requiring higher output during peak load time periods. Autonomous Local: Monitor real power output at ECP or PCC. ICT: Utility updates the schedule of actual or maximum real power values H O H-O Larger DERs or multiple DERs within a facility 26 Schedule DER Functions: Schedule real power and ancillary service outputs The DER system receives and follows schedules for real power settings, reactive settings, limits, modes (such as autonomous volt/var, frequency-watt), and other operational settings. Autonomous ICT: Utility, REP, or FDEMS issues schedules to DER system H O M Recommended for all DER systems but may not always be activated
SIWG_Phase_3_Functions_v3.docx