4 Limit Maximum Real The utility issues a direct command to limit the Autonomous H Larger DERs or Power: Limit maximum maximum real power output at the ECP or PCC. The large groups of Local: Monitor real real power output at an reason might be that unusual or emergency DERs where ICT power output at PCC ECP or the PCC upon a conditions are causing reverse flow into the feeder’s capabilities are ICT: Utility issues a direct command from substation or because the total DER real power available command to limit the the utility output on the feeder is greater than some real power output at percentage of total load. The command might be an the ECP or PCC absolute watt value or might be a percentage of DER output. This function is feasible only if the ICT infrastructure is available. It might also be used to ensure fairness across many DER systems. 5 Schedule Output at PCC: The utility establishes (or pre-establishes) a schedule Autonomous H Larger DERs or Schedule actual or (e.g. on-peak & off-peak) of actual or maximum real multiple DERs Monitor real maximum real power 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
4 Limit Maximum Real Power: Limit maximum real power output at an ECP or the PCC upon a direct command from the utility The utility issues a direct command to limit the maximum real power output at the ECP or PCC. The reason might be that unusual or emergency conditions are causing reverse flow into the feeder’s substation or because the total DER real power output on the feeder is greater than some percentage of total load. The command might be an absolute watt value or might be a percentage of DER output. This function is feasible only if the ICT infrastructure is available. It might also be used to ensure fairness across many DER systems. Autonomous Local: Monitor real power output at PCC ICT: Utility issues a command to limit the real power output at the ECP or PCC H Larger DERs or large groups of DERs where ICT capabilities are available 5 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 power 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 Monitor real power output at ECP or PCC. ICT: Utility updates the schedule of actual or maximum real power values H Larger DERs or multiple DERs within a facility
SIWG_Phase_3_Functions_v2.docx