Today’s LiveWire Spotlight looks at NERC’s latest annual frequency response filing – a technical study directed by FERC when BAL-003-1 was approved. This year’s review found flaws in the equation used to calculate IFRO – which will require the Interconnections to continue to use the 2016 values throughout 2017.

Due to the freeze in IFRO, Balancing Authorities will not need to re-calculate Frequency Bias Settings and L10 values early next year. It is not clear how long the suspension will stay in effect, as BAL-003-1.1 must be modified to incorporate the recommended changes – which could easily take a year or more to complete.