Ancillary Services
system operation ancillary services · frequency regulation · reactive power · black start · 보조서비스
Services generators and others provide, beyond producing power, to keep the grid stable. They include frequency regulation, reserves, reactive power and black start.
The rules' formal name is 'system operation ancillary services'. They are services such as frequency regulation, reserves, reactive power and black start that electricity businesses provide to maintain the reliability, stability and power quality of the grid and to keep power trading running smoothly.
KPX secures ancillary services according to the standards in the rules and reflects them in the generation schedule and real-time dispatch plans. Frequency control services are split into several tiers by response speed; reactive power is used to hold voltage, and black start to restore the grid after a wide-area blackout. Providers are paid through a separate settlement.
News-reading tip: stories about energy storage or pumped hydro entering the 'ancillary services market' are not about selling energy (kWh). They are about paying for the ability to stand by and respond quickly when needed.