12 Schedule Storage: Set or For a DER system that has storage capabilities, such Autonomous Recommended schedule the storage of as battery storage or a combined PV + storage for DER systems ICT: Utility updates the energy for later delivery, system or a fleet of electric vehicles. Preset with storage storage settings and/or indicating time to start values can be established. Settings are capabilities schedule charging, charging rate coordinated between the utility and DER operator. and/or time Different scenarios could include: “charge-by” Low load conditions at night are causing some renewable energy to be wasted, so charging energy storage DER systems at that time makes power system operations more efficient. DER controller charges at the specified rate (less than or equal to the maximum charging rate) until the state-of-charge (SOC) reaches a specified level. DER controller charges at the necessary rate in to reach the specified SOC within the time. “charge-by” 13 Smooth Frequency The DER system modifies real power output rapidly Autonomous M Recommended Deviations: Smooth to counter minor frequency deviations. The for all DER Monitor frequency minor frequency frequency-watt settings define the percentage of systems but may ICT: Utility updates the deviations by rapidly real-power output to modify for different degrees of not always be frequency-watt settings modifying real power frequency deviations on a second or even activated output to these basis deviations
12 Schedule Storage: Set or schedule the storage of energy for later delivery, indicating time to start charging, charging rate and/or “charge-by” time For a DER system that has storage capabilities, such as battery storage or a combined PV + storage system or a fleet of electric vehicles. Preset values can be established. Settings are coordinated between the utility and DER operator. Different scenarios could include: Low load conditions at night are causing some renewable energy to be wasted, so charging energy storage DER systems at that time makes power system operations more efficient. DER controller charges at the specified rate (less than or equal to the maximum charging rate) until the state-of-charge (SOC) reaches a specified level. DER controller charges at the necessary rate in to reach the specified SOC within the “charge-by” time. Autonomous ICT: Utility updates the storage settings and/or schedule Recommended for DER systems with storage capabilities 13 Smooth Frequency Deviations: Smooth minor frequency deviations by rapidly modifying real power output to these deviations The DER system modifies real power output rapidly to counter minor frequency deviations. The frequency-watt settings define the percentage of real-power output to modify for different degrees of frequency deviations on a second or even basis Autonomous Monitor frequency ICT: Utility updates the frequency-watt settings M Recommended for all DER systems but may not always be activated
SIWG_Phase_3_Functions_v2.docx