National Electricity Market
In this section
In this section
- Summer operations report 2017-18
- Future Power System Security Program - reports and analysis
- Power system operation
- Ancillary services
- Dispatch information
- Congestion information resource
- Demand response mechanism
- Generator performance standards
- Loss factors and regional boundaries
- Optional firm access
- Technical advisory group
- System Strength Impact Assessment Guidelines
- Interactive maps and dashboards
- Electricity Forecasting Insights
- Previous National Electricity Forecasting Report
- NEM Electricity Statement of Opportunities
- Integrated System Plan
- National Transmission Network Development Plan
- Victorian transmission network service provider role
- Independent regional planning reports
- Load forecasting in pre-dispatch and STPASA
- Solar and wind energy forecasting
- Transmission Connection Point Forecasting
- Generation information page
- South Australian Advisory Functions
- Energy Adequacy Assessment Projection (EAAP)
- Value of Customer Reliability
- Demand Side Participation Information Guidelines
- The National Electricity Market (NEM) incorporates around 40,000 km of transmission lines and cables.
- It supplies about 200 terawatt hours of electricity to businesses and households each year.
- It supplies around 9 million customers.
- It has a total electricity generating capacity of 45,000 MW.
- $7.7 billion was traded in the NEM in 2014–15.
The NEM commenced operation as wholesale spot market in December 1998. It interconnects five regional market jurisdictions – Queensland, New South Wales (including the Australian Capital Territory), Victoria, South Australia, and Tasmania. Western Australia and the Northern Territory are not connected to the NEM.
The NEM involves wholesale generation that is transported via high voltage transmission lines from generators to large industrial energy users and to local electricity distributors in each region, which deliver it to homes and businesses.
The transport of electricity from generators to consumers is facilitated through a ‘pool’, or spot market, where the output from all generators is aggregated and scheduled at five-minute intervals to meet demand.
The market uses sophisticated systems to send signals to generators instructing them how much energy to produce each five minutes, so production is matched to consumer requirements (spare capacity is kept ready for emergencies), and the current energy price can be calculated.
NEM infrastructure comprises both state and private assets managed by industry participants.
You can learn more in our Introduction to the National Electricity Market fact sheet.
For more information on the NEM, please contact the Support Hub.