Short Term PASA reports

In accordance with clause 3.17.1 of the WEM Rules, by 4:30pm (WST) of every Thursday, AEMO must publish the following information (described in clause 3.17.9) developed as a result of its Short Term PASA (ST PASA) study for each six-hour period of a three-week planning horizon, starting from 8.00am on the day following the day on which the ST PASA study is performed:

(a) peak load forecasts for the following scenarios:
i. mean;
ii. mean plus one standard deviation; and
iii. mean plus two standard deviations;
(b) forecast total available generation capacity by six-hour period;
(c) System Management’s reasonable forecast of the total available Demand Side Management capacity by six-hour period;
(d) by six-hour period, the amount equal to:
i. the load forecast referred to in clause 3.17.9(a)(iii); minus
ii. the total forecast available generation capacity; minus
iii. System Management’s reasonable forecast of the total available Demand Side Management capacity;
(e) any six-hour periods where a shortfall of capacity is forecast, including a shortfall of Ancillary Services or an inability to satisfy the Ready Reserve Standard;
(f) transmission outages of which System Management is aware, forecast transmission capacity between potentially constrained regions, and any constraints that are likely;
(g) possible security problems that could affect market or dispatch outcomes;
(h) [Blank]
(i) the details of any use by System Management of its own data in place of data provided in accordance with clause 3.17.8, and the reasons why System Management’s data was substituted; and
(j) for each approved Commissioning Test the Facility to be tested and the dates and times during which the Commissioning Test will be conducted.

Step 4.1.4 of the Power System Operation Procedure (PSOP) for ST PASA requires AEMO to publish methodologies covering various aspects of ST PASA. AEMO is required to engage with Market Participants and Network Operators in relation to the implementation of those methodologies prior to publication. The methodologies are available here:

Participants can also use the blank charting template in the form of an Excel spreadsheet to help interpret the historical data below. Please note that the CSV file must be copied into this Excel spreadsheet to obtain the required chart.

This page is published in accordance with WEM Rule 10.5.1 (o). 

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