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global settlement and UFE

https://www.aemc.gov.au/sites/default/files/2018-12/Global%20Settlement%20and%20Market%20Reconciliation%20-%20For%20publication.pdf

https://aemo.com.au/initiatives/major-programs/nem-five-minute-settlement--program-and-global-settlement/global-settlement/how-gs-will-work

https://aemo.com.au/-/media/files/electricity/nem/data/metering/ufe/2022/ufe-report-june-2022.pdf?la=en

UFE calculation

In accordance with NER 3.15.5, for each local area, the UFE amount for each trading interval is determined by the following formula: $$ UFE = TME – DDME – ADME $$ Where:

  • UFE is total unaccounted for energy for a local area,

  • TME is total energy inflows into a local area from transmission connection points,

  • DDME is cross boundary energy flow between adjacent distribution networks. DDME is a positive value for the supplying distribution local area and a negative value for the receiving distribution local area, and

  • ADME is the aggregate of energy flows for each connection point in a local area. UFE, TME, DDME and ADME information is available from the RM 46 Report for financially responsible Market Participants (FRMPs) and Local Network Service Provides (LNSPs).

UFE allocation

The allocation of UFE for every distribution network connection point in a local area is determined by the following formula: $$ UFEA = UFE x (DME/ADMELA) $$ Where:

  • UFEA is the allocation of local area unaccounted for energy for a connection point,

  • DME is the load component (ME- x DLF) at a connection point in the local area,

  • ME- is load component as recorded in the metering data at a connection point in the local area,

  • DLF is the distribution loss factor applicable at a connection point in the local area, and

  • ADMELA is the aggregate of all DME amounts in a local area for which a Market Customer is financially responsible

UFE Factor (UFEF)

The UFE Factor (UFEF) is used to facilitate the allocation of UFE to individual connection points. $$ UFEF = UFE/ADMELA $$ Where:

  • UFE is total unaccounted for energy for a local area, and

  • ADMELA is the aggregate of all DME amounts in a local area for which a Market Customer is financially responsible

  • UFEA = UFE x (DME/ADMELA), or can be expressed as UFEA = DME x (UFE/ADMELA), therefore UFEA = DME x UFEF UFEF and ADMELA are available from the RM 46 Report. UFEF is also available from the RM 43 Report.