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Predispatch

30-minute Predispatch (Predispatch)

  • https://www.aemo.com.au/-/media/files/electricity/nem/security_and_reliability/power_system_ops/procedures/so_op_3704-predispatch.pdf?la=en

  • Runs and is published every 30 minutes

  • forecasts out to the end of the next market day (4 AM the following day). It can cover a period of up to 48 hours or more.

5-minute Predispatch (P5MIN)

  • Runs and is published every 5 minutes

  • Forecasts for the next 12 dispatch cycles (one hour)

Extended Predispatch (PD7Day)

https://www.aemo.com.au/-/media/Files/Electricity/NEM/Emergency_Management/2017/Guide-to-Extended-Predispatch-Report.pdf

Total demand

https://aemo.com.au/-/media/files/electricity/nem/security_and_reliability/dispatch/policy_and_process/demand-terms-in-emms-data-model.pdf?la=en

Table dispatchregionsum:

  • NetInterchange: negative for import

  • Gen - NetInterchange(export) = TotalDemand + Load - WDR_Dispatched + AllocatedInterconnectorLosses

Energy reserve

Reserve = AvailGen - NetInterchange (Export) - TotalDemand

Table predispatchregionsum, p5min_regionsolution, dispatchregionsum:

  • TOTALDEMAND: forecast total demand in MW (less normally on loads)

  • AVAILABLEGENERATION: aggregate generation bid available in the region (MW), the sum of all generation units' available capacity.

  • AVAILABLELOAD: aggregate load bid available in the region (MW). This primarily refers to dispatchable load or interruptible load that can be reduced to help balance supply and demand.

  • PREDISPATCHSEQNO format: yyyymmddxx

  • RUN_DATETIME format: yyyy-mm-dd 24hh:mi:ss

  • SETTLEMENT_DATE format: yyyy-mm-dd 24hh:mi:ss

Regional excess supply

https://www.aemo.com.au/-/media/files/electricity/nem/security_and_reliability/power_system_ops/reserve-level-declaration-guidelines.pdf Mainland regions:

RXS
= + Aggregate Non-Energy Limited Capacity
  + Aggregate Energy Limited Capacity
  - Aggregate Semi-Scheduled Output
  - Net Interconnector Export
  + Aggregate Semi-Scheduled Output
  - Scheduled Demand
= + AvailGen
  - NetInterchange (Export)
  - TotalDemand