Australian Electricity Grid

The National Energy Market (NEM) is run by Australian Energy Market Operator (AEMO). Western Australia and Northern Territory are not included and the ACT is considered part of NSW.

The Grid

The grid supplies the power to satisfy the demand of consumers. In a grid the supply must always equal demand. If the demand increases suddenly, the grid frequency will reduce slightly causing the demand to be slightly lowered and indicating that the online generators should increase power to restore the frequency.

Variation of Demand

The demand changes throughout the day and through the seasons.

screenshot-grid publicknowledge com au 2014-11-21 15-18-06
Generators use different fuels.
screenshot-grid publicknowledge com au 2014-11-21 17-08-27

The generators that are actually used depends on the wind and prices amongst other factor. Here is the breakup by fuel class on a very windy day and for a calm day.

screenshot-grid publicknowledge com au 2014-11-21 17-59-09 screenshot-grid publicknowledge com au 2014-11-21 18-04-02

Generator Classes and Types

The generators that use the same fuel may differ in technology.

screenshot-grid publicknowledge com au 2014-11-21 17-32-12

Interconnectors between states

The State grids export and import power via Interconnectors. This site treats the forward and reverse directions as separate Interconnections. The interconnectors are not of unlimited capacity so the market may sometimes be fragmented and this may contribute to differences in price between states.

screenshot-grid publicknowledge com au 2014-11-21 17-27-26

Companies

All the generators are now owned by private companies.
screenshot-grid publicknowledge com au 2014-11-21 17-41-37

National Energy Market

The grid is managed as a market with companies bidding their generators and prices fluctuating. Occasionally the prices are quite stable and uniform across the whole grid, usually otherwise. Prices are an area for further investigation.

screenshot-grid publicknowledge com au 2014-11-21 18-19-18 screenshot-localhost 2014-11-21 18-29-36

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