The Timeline
You can change the range of data displayed in all of the charts on the Graphical Trends tab by using the slider bar at the top of the form.
The slider works the same way for the Short-Term and Medium-Term views (though the data is slightly different).
On the image above, some numbers have been added - please refer to the notes below:
Used to select the type of PASA run that you want to display data for:
- RELIABILITY_LRC results consider supply adequacy against a 10% poe demand forecast and only those constraints reflecting network capability with all plants assumed to be available for service. It is these results that serve as a trigger for NEMMCO to address forecast reserve shortfalls.
- OUTAGE_LRC results consider supply adequacy against a 50% poe demand forecast and include network constraints reflecting expected network outage conditions.
The drop-down menu shows the NEMMCO run selected from those stored in the NEMforecast database. NEMMCO will publish Short-term PASA data every 2 hours, and Medium-term data every week, so as long as the NEMforecastUpdater is running, the latest published run data will be listed.
The ruler shown highlights the full range of data available from the run selected in #1:
- for Short-Term, the range will be 7 days from 4:30am tomorrow morning (the start of the next trading day).
- for Medium-Term, the range will be 2 years from the coming sunday.
The duration of time - or data range - that is to be graphed in the Graphical Trends tab. This can be resized as desired (just mouse over the ends of the bar and drag either end in the required direction).
To adjust the range of data displayed, move the cursor to the appropriate "adjustment handle", click and then drag in the desired direction. When you being dragging, a tooltip will be displayed the shows you the date that that adjustment handle is positioned on. In addition to resizing the range, it can also be dragged along the timeline by placing the cursor within the control (ie between the start and end marks - and not on the time selector), clicking when the cursor changes to a four-way arrow cursor and then dragging in the direction required.
The specific point in time that information in the Geographic tabs is displayed for (see the descriptions of the Short-Term Geographic tab and the Medium-Term Geographic tab). This can be adjusted to lie anywhere within the data range being used. This is shown as a vertical line in the graphs on the Graphical Trends tabs (red line for the short-term tab and blue for the medium-term tab), while the data displayed on the Geographic tab is for this specific time.
The left and right arrows either increment or decrement the point in time to either the previous point of the following point respectively. That is, for the short-term timeline, the left arrow will move the time selector to the previous 1/2 hour data set (7:30 am) and similarly, the right arrow will move the time selector to the next 1/2 hour data set (8:30 am). Likewise, for the medium-term timeline, the arrows will move the time selector the previous or following day - since the MT PASA data has a resolution of days (see the ST PASA and MT PASA page for more details).