If you are interested in understanding the enormity of the energy transition in Australia, AEMO’s 2024 Integrated System Plan for the National Electricity Market (ISP) is the document to read. The ISP is a plan for investment to ensure a reliable and secure power system through Australia’s transition to a net zero economy. It was produced by AEMO following extensive consultation (with more than 2,100 stakeholders) over the previous 2 years.
The 2024 ISP is set among the background of the ‘essential transition [that] is well underway.’ That transition is from expensive to run and maintain coal generators to renewable generation. The transition is already underway as demonstrated by the fact that renewables accounted for close to 40% of the total electricity delivered through the NEM in 2023 and as demonstrated by the rapid closure of coal fired power stations. The transition is also occurring at the same time as we are seeing a dramatic increase in demand, that will require the NEM to almost triple its generation capacity by 2050.
Would implementation of the ISP result in positive outcomes?
There are a number of significant benefits expected from the transition. The ISP forecasts the creation of almost 30,000 jobs over the next 20 years to build new infrastructure and maintain and operate the energy system. This substantial workforce growth will provide economic opportunities, particularly in regional areas.
Beyond job creation, the transition promises greater insulation from international shocks that affect gas, petroleum and coal prices, potentially reducing cost-of-living pressures. The shift to renewables, with their lower fuel, maintenance and operation costs, is expected to provide more reliable and affordable energy as coal-powered generation is replaced.
The energy sector’s efforts to reduce emissions, targeting net zero by 2050, will contribute significantly to global efforts to mitigate climate change. This transition also opens new economic opportunities for Australia. As global trade and Australian policies increasingly favour low-emission products, Australia could see new export opportunities in low-emission, energy-intensive industries such as green steel and aluminium production, data warehouse services, green energy (hydrogen and ammonia), and critical mineral processing.
Additionally, the transition is expected to support Australia’s existing regional and rural economies by providing lower-cost electricity and further opportunities for economic expansion. These potential benefits are both significant and attainable, putting Australia in a globally enviable position.
Will the implementation of the ISP be easy?
The transition won’t be easy. AEMO states that there are inherent tensions that must be managed for the transition to succeed:
- Balancing today’s needs with tomorrow’s infrastructure: The NEM must operate safely and reliably today while being steadily refitted for the future. This requires careful timing to ensure new generation and firming capacity comes online ahead of coal retirements.
- Integrating new technologies while keeping the whole system stable: The power system must evolve to operate securely with very high penetrations of renewable energy. This requires continued development of system services, resource adequacy and operational capabilities.
- Delivering reliable and affordable electricity while addressing community concerns: New transmission and generation infrastructure must be built, which impacts local communities. Earning social licence through early and effective community engagement is critical.
- Competing globally for investment and resources: Australia is not the only country transforming its energy system. There is global competition for the same investment, equipment and engineering skills needed to deliver the transition.
Today and Tomorrow
Balancing current operational needs with future infrastructure requirements.
Challenges:
- Maintaining reliability with aging coal infrastructure
- Coordinating coal retirements with new generation deployment
- Managing short-term costs vs long-term investments
Potential Solutions:
- Staged transition plans for each region
- Incentives for timely infrastructure investment
- Flexible capacity mechanisms to ensure reliability
Parts and the Whole
Integrating diverse technologies into a cohesive energy system.
Challenges:
- Coordinating distributed energy resources
- Ensuring system stability with high renewable penetration
- Balancing local optimizations with system-wide efficiency
Potential Solutions:
- Advanced grid management systems
- Investment in storage and grid-forming technologies
- Development of advanced market mechanisms for services
People and Populations
Addressing local concerns while delivering benefits for all consumers.
Challenges:
- Managing community opposition to new infrastructure
- Ensuring equitable distribution of costs and benefits
- Balancing urban and rural energy needs
Potential Solutions:
- Community co-investment in energy projects
- Transparent benefit-sharing mechanisms
- Localized energy solutions and microgrids
Australia and the World
Competing globally while maintaining energy security and affordability.
Challenges:
- Securing supply chains for critical technologies
- Attracting investment in a competitive global market
- Aligning domestic policies with international commitments
Potential Solutions:
- Strategic partnerships for technology development
- Policy stability to encourage long-term investment
- Leveraging Australia’s resources for green industries
What are the key elements of the optimal development path?
The ISP sets out an optimal development path (ODP) to meet future energy needs reliably and affordably while achieving emissions reduction targets. Key elements include:
- Tripling grid-scale variable renewable energy by 2030, and increasing it six-fold by 2050. This means adding about 6 GW of capacity every year.
- Focusing new generation in renewable energy zones (REZs) to access quality resources and reduce costs.
- Quadrupling firming capacity from sources like grid-scale batteries, pumped hydro, coordinated consumer energy resources, and gas-powered generation.
- Supporting a forecast four-fold increase in rooftop solar capacity, reaching 72 GW by 2050.
- Building close to 10,000 km of new transmission by 2050 to connect diverse generation and improve system resilience.
Key ISP Findings
- Coal retirements are forecast to occur 2-3 times faster than announced dates.
- By 2034-35, about 90% of coal capacity is forecast to retire in the Step Change scenario.
- Renewable energy is expected to reach 99% of annual generation by 2049-50.
- Approximately 10,000 km of new transmission lines are needed by 2050.
- Total investment of $142 billion is required, with $16 billion allocated for transmission infrastructure.
- The NEM must triple its firming capacity from alternative sources to coal by 2050, including 49 GW/646 GWh of dispatchable storage.
What are the major risks to delivering the optimal development path?
AEMO identifies several key risks that could impact delivery of the ODP:
- Insufficient infrastructure investment due to uncertainty and complex approval processes.
- Early retirements of coal-fired generators before adequate replacement capacity is available.
- Markets and power system operations not being ready for very high penetrations of renewable energy.
- Consumer energy resources not being adequately integrated into grid operations.
- Challenges in earning social licence for new infrastructure development.
- Supply chain constraints and workforce shortages for critical energy assets and skills.
The ISP emphasises that addressing these risks will require coordinated effort from industry, governments and communities. Early action and investment is needed to keep the energy transition on track and deliver reliable, affordable and low-emission electricity for Australia’s future. The scale and complexity of this transition are immense, but so too are the potential benefits for Australia’s economy, environment and energy security.
