As time permits, will flesh out an explanation of how the Scheduled category currently operates in the NEM, and how it has evolved.
(A) Summary of current arrangements
A Generator, or a Load*, can be registered with the AEMO as “Scheduled”.
(B) Chronology of evolution
Will add something in here, as time permits.
| Date | Description |
| 13th December 1998 (Start of the NEM) |
At the start of the NEM generators supplying the NEM were registered as Scheduled or Non-Scheduled. The Semi-Scheduled registration category did not exist. |
| Early 1999 | The aluminium smelters in Victoria were registered as Scheduled Loads for a brief time at the start of the market – however that registration status was allowed to lapse. |
| When in 2017? | Registration threshold set at 5MW (i.e. down from the 30MW criteria that applies to slower-responding generators) was implemented for batteries in conjunction with the development of the Hornsdale Power Reserve. |
More
(C) Other useful references
On this WattClarity(r) site, any articles tagged with ‘Scheduled’ can be found here.
Will add in other links to useful references as time permits…