Reading Grid.PublicKnowledge.com.au home page

The main site is at http://grid.publicknowledge.com.au

Table 1

screenshot-grid publicknowledge com au 2014-11-25 16-48-21

On 2014-11-24 the grid produced a maximum power of 26.5 gigawatts at 14:00 in the afternoon – 2pm.

The Standard Deviation of demanded power was 53.8 megawatts. This is a measure of the short term variation of the demand.

The cost is determined using the Regional Reference Price for each 5 minute period. The “wholesale” price for this day for the grid was $24,000,000.

Coal fired generators provided 76.5% of the energy on this day.
Renewables is only wind at this stage as there don’t seem to be any solar generators contributing to the grid. Perhaps landfill gas and similar should be included in renewables as seems to be done in some countries.

This summary is intended to be suitable for use a radio broadcaster to use daily.

Figure 2

screenshot-grid publicknowledge com au 2014-12-02 16-27-17

This chart shows the percentage of energy generated by different broad fuel classes. Most legend items (ARROW 1) are links to lower level data.

In the lower figure  the demand for each fuel class is shown for each 5 minute period of the day.

The ARROW 2 points to the icon of a larger version of the chart.

Figure 3

screenshot-grid publicknowledge com au 2014-12-02 16-33-19

This shows how the demand for each state changes throughout the day.

Browsing to the state in the legend (ARROW 1) will make that state the subject of the next page.

The lower figure  shows the Regional Reference Price for each state during the day. Sometimes the states remain in fairly close agreement but often some state prices will have extreme values. 2014-01-14 is an example of very high price spikes while 2014-01-15 has both low and high spikes.

The price spikes warrant further investigation and perhaps a few dedicated posts.

Navigation bar

screenshot-grid publicknowledge com au 2014-11-25 17-17-12

The indicated icons will bring more content on to the page. These settings will be remembered if you have cookies enabled in your browser.

Navigation bar

screenshot-grid publicknowledge com au 2014-11-25 17-33-30

ARROW 1 allows for the selection of a past date. Currently the 1st and 15th of each month back to 2013-11 have been loaded. Since about 2014-11-12 each day has been loaded. Any day within the last 12 months can be typed into the box but will take a minute or two to respond.

ARROW 2 allows all loaded dates to be plotted and compared.

ARROW 3 shows where to change from dark on light to light on dark which is very vivid. Currently part of the plot background gets stuck in black, but this will eventually be fixed.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s