9 Dynamic Current The DER system counteracts voltage anomalies Autonomous H H H All DER systems Support: Counteract (spikes or sags) through current support”. but may not “dynamic Local: Monitor voltage voltage excursions The DER system supports the grid during short always be anomalies beyond normal limits by periods of abnormally high or low voltage levels by activated ICT: Utility updates providing dynamic feeding reactive current to the grid until the voltage dynamic current current support either returns within its normal range, or the DER settings system ramps down, or the DER system is required to disconnect. 10 Watt- Power Factor: The power factor is not fixed but changes with the Autonomous At the PCC and/or Power factor is shifted power level. It might be slightly capacitive at very ECP? Local: Monitor real based on real power low output power levels and becoming slightly power output output inductive at high power levels. ICT: Utility updates power factor settings 11 Smooth Frequency The DER system modifies real power output rapidly Autonomous H-M O H-O Recommended Deviations: Smooth to counter minor frequency deviations. The for all DER Local: Monitor minor frequency frequency-watt settings define the percentage of systems but may frequency deviations by rapidly real-power output to modify for different degrees of not always be ICT: Utility updates the modifying real power frequency deviations on a second or even activated frequency-watt settings output to these basis deviations
9 Dynamic Current Support: Counteract voltage excursions beyond normal limits by providing dynamic current support The DER system counteracts voltage anomalies (spikes or sags) through “dynamic current support”. The DER system supports the grid during short periods of abnormally high or low voltage levels by feeding reactive current to the grid until the voltage either returns within its normal range, or the DER system ramps down, or the DER system is required to disconnect. Autonomous Local: Monitor voltage anomalies ICT: Utility updates dynamic current settings H H H All DER systems but may not always be activated 10 Watt- Power Factor: Power factor is shifted based on real power output The power factor is not fixed but changes with the power level. It might be slightly capacitive at very low output power levels and becoming slightly inductive at high power levels. Autonomous Local: Monitor real power output ICT: Utility updates power factor settings At the PCC and/or ECP? 11 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 Local: Monitor frequency ICT: Utility updates the frequency-watt settings H-M O H-O Recommended for all DER systems but may not always be activated
SIWG_Phase_3_Functions_v3.docx