The curtain is falling on Australia’s coal industry faster than anticipated. Coal power stations are now expected to shut down entirely by 2038, a five-year acceleration from earlier predictions. To fill the energy gap, renewable sources with variable output will need to grow rapidly, tripling by 2030 and reaching a staggering seven times their current capacity by 2050.
A major turning point for Australian energy is outlined in the latest roadmap for the country’s main electricity grid, the National Electricity Market. This draft plan, titled “2024 Integrated System Plan” and released by the Australian Energy Market Operator (AEMO), charts a course for the next two decades. It prioritizes a transition away from coal and towards renewable energy sources, with storage solutions to ensure a steady supply.
What is the plan and what is its importance?
AEMO keeps our energy market stable and is now charting a course for future transmission infrastructure. This plan is the key to making it happen.
Australia’s traditional power grid relied on funneling cheap, but dirty, coal power from large plants to cities. Now, with coal plants shutting down, we need a completely new system. This future grid will gather renewable energy from diverse locations and utilize storage solutions to ensure a steady supply.
To ensure a smooth energy transition, AEMO releases a detailed roadmap every other year. This plan is built upon sophisticated modeling and collaborative efforts with the entire energy sector.
This process helps AEMO identify the “sweet spot” for our energy future. In other words, they find the most cost-effective and reliable combination of power generation, storage, and transmission lines. This ensures a steady and secure energy supply while aligning with government goals to reduce emissions and ultimately benefitting consumers in the long run.
Australia’s electricity laws recently got an update, making emission reduction a key goal. To reflect this shift, AEMO now exclusively uses scenarios that align with the government’s emission reduction targets when creating their plans.
This new plan aims to make Australia’s ongoing shift to renewable energy as cost-effective, reliable, and practical as possible. A crucial aspect is identifying locations for critical new infrastructure, particularly transmission lines, which are essential for delivering power in this revamped system.
What is the update?
Australia’s energy landscape is undergoing a dramatic shift, according to the latest draft plan by the Australian Energy Market Operator (AEMO). Coal-fired power plants, the backbone of the national grid for decades, are slated for retirement much sooner than anticipated. The plan predicts all coal plants will be shut down by 2038, five years earlier than previous estimates. To compensate for this loss, renewable energy sources like wind and solar will need to grow significantly. AEMO’s roadmap anticipates a tripling of renewable energy capacity by 2030 and a staggering sevenfold increase by 2050. This transition won’t be without its challenges. The traditional grid, designed to deliver cheap coal power from large plants to cities, will need a complete overhaul. The new system will gather renewable energy from diverse locations and utilize storage solutions to ensure a steady supply. AEMO, responsible for the smooth operation of the energy market, plays a crucial role in planning for this future. Every two years, they release a comprehensive plan informed by industry experts and detailed modeling. This process helps them identify the most cost-effective and reliable combination of power generation, storage, and transmission lines, all while keeping emissions in check and benefiting consumers in the long run. The latest plan explores three potential scenarios: a rapid shift towards renewable energy to meet emission targets (Step Change), a more gradual transition with slower economic growth (Progressive Change), and a future focused on clean energy exports (Green Energy Exports). AEMO believes the Step Change scenario is the most likely path, followed by Progressive Change.
The Step Change scenario paints a picture of rapid transformation. Under this plan, a staggering 90% of Australia’s remaining coal-fired capacity (21 gigawatts) would be retired by 2034-35, with the complete phase-out happening by 2038. This is a significant acceleration compared to the previous plan’s 2043 deadline. AEMO suggests this faster coal retirement could be driven by several factors: rising operating costs for coal plants, dwindling fuel security, increasing maintenance expenses, and growing competition from cheaper renewable energy sources in the market.
The Step Change scenario demands a significant ramp-up in renewable energy to compensate for the coal phase-out and meet rising electricity needs from population growth and electric vehicles. While ambitious, the plan calls for adding approximately 6 gigawatts of renewable energy capacity to the grid annually over the next decade. This represents a substantial increase, but Australia is already nearing 4 gigawatts of yearly deployment. The plan also forecasts a surge in rooftop solar installations, exceeding the previous plan’s prediction by a substantial 18 gigawatts.
The latest AEMO plan outlines a need for nearly 10,000 kilometers of new transmission lines by 2050 to achieve the most cost-effective energy system. This is a slight decrease compared to the previous plan due to rising transmission costs and a shift towards renewable sources that require less extensive transmission infrastructure. While some smaller transmission projects have been completed since the last plan, timelines for most large-scale projects have been delayed.
The hold-up on new transmission lines is partly due to pushback from communities. Recognizing this challenge, AEMO now emphasizes “social license” as a critical hurdle to overcome in building the new energy infrastructure. “Social license” refers to the public’s acceptance of a project, highlighting the importance of community engagement for successful implementation.
Flexibility and gas
The 2024 plan emphasizes the need for a significant increase in the grid’s “firming capacity.” This refers to the ability to manage fluctuations in renewable energy production. By quadrupling this capacity, the plan aims to smooth out the peaks and valleys of renewable energy output, reducing the risk of power shortages for consumers.
The plan proposes several solutions to address the variability of renewable energy sources and ensure a stable supply for consumers. This includes large-scale battery storage facilities, pumped hydroelectric storage (using water reservoirs to store energy), and even a potentially contentious option: utilizing coordinated power from home battery systems to create a virtual power plant. The plan also acknowledges the possibility of relying on gas-powered generation, though this might be a controversial approach.
The plan outlines the need for 50 gigawatts (GW) of dispatchable storage capacity, along with an additional 654 gigawatt-hours (GWh) of storage. Dispatchable storage refers to systems that can release energy on demand, which is crucial for managing the variability of renewable sources. The plan also includes 16 GW of flexible gas generation, which can be ramped up or down quickly to meet changing energy needs. This inclusion of gas might be a point of contention.
The plan proposes a substantial increase in gas capacity compared to previous projections. Whereas the last plan anticipated needing just over 9 GW of gas-fired generation, the current plan calls for 16 GW. This significant rise in reliance on gas may be a source of debate.
While the plan proposes a higher gas capacity, AEMO doesn’t envision these gas plants running constantly. Instead, they’re seen as a reliable backup option used infrequently. This ensures the grid remains stable and secure even during periods when renewable energy sources might not be sufficient.
Don’t be fooled by the higher gas capacity. This doesn’t translate to a jump in how much gas is actually burned for electricity. AEMO predicts a significant decrease in gas power generation in the near to mid-term.
The plan anticipates a rise in gas generation after the final coal plants shut down in 2033. While this gas might come from traditional fossil sources, AEMO also sees potential for cleaner options like hydrogen or biogas (derived from biomass).
AEMO acknowledges a potential hurdle in their plan: transitioning the existing natural gas network from regular use to infrequent backup duty. This shift in how gas is used could pose challenges for the current infrastructure.
The plan doesn’t derail Australia’s clean energy goals. Phasing out nearly all fossil fuel generation from the main grid by 2034 would be a significant achievement. Even in a worst-case scenario where all backup power came from natural gas, the overall emissions from the grid would be minimal. We’re talking about an emissions intensity of around 0.01 tonnes per MWh, which is a staggering 60 times lower than current levels.
