This Chart of the week focuses on the comparatively small but important Frequency Control Ancillary Services (FCAS) in the NEM. FCAS in terms of total dollars is minuscule in comparison to the total energy bill. While the proportion may appear small, its function is key to maintaining a secure operating state within the five-minute dispatch cycle. It acts as the force to keep the system frequency in balance when it wanders off course.
Jake Dunstan
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