Australia stands at the forefront of the global energy transition, with impressive progress in adopting renewable energy from wind and solar. But as renewable penetration increases, so does the challenge of intermittency. For utility providers, the priority is no longer just about expanding renewable capacity. It’s about ensuring that power generation remains both reliable and responsive to constantly changing demand.
Wärtsilä’s flexible engine power plants are built to meet this need. Capable of starting within minutes and maintaining high efficiency across a wide range of loads, they help utilities stabilise the grid, manage peak demand, and respond quickly to renewable fluctuations. At the same time, they create new revenue opportunities by enabling fast, accurate responses in Australia’s dynamic energy markets.
As more renewables enter the grid, flexibility becomes essential. Wärtsilä’s engine power plants are designed to provide rapid, reliable support by responding instantly to changes in supply and demand.
Unlike traditional turbines, these engines can reach full load in just minutes and maintain high efficiency, even when operating at only 10% capacity. With up to 48% net efficiency across a wide range of loads, they consume significantly less fuel, up to 28% less than turbine alternatives.
Their modular design allows operators to start only the number of engines needed at any given time. If one engine goes offline, the others continue running independently, ensuring uninterrupted power. This level of redundancy makes them ideal for utilities balancing both baseload and peaking needs.
To further strengthen grid stability, Wärtsilä engines can be equipped with a synchronous condenser feature. The synchronous condensers stabilise grid frequency and voltage, and support faster recovery during power grid faults such as short-circuits, helping maintain system stability as more renewables enter the grid.
Built for extreme conditions, Wärtsilä engines perform reliably even in 45-degree heat. With negligible water consumption and the ability to operate on low fuel gas pressure, these features add another layer of operational resilience.
In Australia's National Electricity Market (NEM), where renewable energy penetration is high, flexibility has become a critical financial asset. Wärtsilä's engine power plants are engineered to ramp up and down rapidly with minimal wear, avoiding the costly cycle limits and extensive overhauls often associated with traditional gas turbines.
The shift to five-minute settlement intervals has only increased the need for flexible power generation. Wärtsilä's engines enable utilities to react quickly to price spikes and system needs, allowing them to monetise their flexible capacity effectively. By participating in ancillary service markets and providing rapid dispatchable power, engine-based plants shift from being cost centres to sources of revenue with multiple income streams.
Wärtsilä’s engine power plants are built to run on various gaseous and liquid fuels, including 100% synthetic, carbon-neutral methane and hydrogen/natural gas blends with up to 25 vol% hydrogen. Our dual-fuel engines can switch between fuels instantly without reducing load or compromising power plant availability.
To support the transition away from fossil fuels, we’ve introduced the world’s first large-scale engines capable of running on 100% hydrogen. This makes today’s investments in engine technology future-proof to tomorrow’s energy landscape, without the risk of them becoming stranded assets as the grid moves toward full decarbonisation.
The Wärtsilä 46TS is a proven technology and our most advanced and flexible engine platform, purpose-built to support both renewable integration as well as deliver cost-effective baseload power.
High mechanical output (23.4 MW/unit) means fewer engines are needed to meet demand, simplifying plant design and reducing overall capital cost.
World-class efficiency (51.3%) saves fuel and reduces emissions.
Excellent performance in extreme ambient conditions, with no derating required in temperatures ranging from -55°C to +55°C.
Rapid response to fluctuations with fast ramp-up time (2 minutes).
No minimum up or downtime requirements.
Reciprocating internal combustion engines have been proven to start and stop quickly, adjust power rapidly, and operate efficiently at various loads when compared to aeroderivative gas turbines (aeros). In other words, engines are more flexible.
Using real operational data from Australia’s National Electricity Market, we’ve demonstrated how engine-based power plants are dispatched earlier and more frequently than turbines, playing a consistent and reliable role in balancing renewable generation.
In this animation video, we demonstrate the exceptional flexibility that engine power plants provide in balancing renewables. There is now clear evidence that engines are dispatched much more frequently and earlier than aeros. We can also see how the engines provide continuous balancing of renewables on a minute-by-minute basis.
In a market where capacity needs are growing and policies are becoming increasingly stringent, long lead times put utilities at a clear disadvantage. Wärtsilä engine power plants require relatively short erection and commissioning times. Depending on the engine type and plant configurations, our power plants can be delivered within 10 to 18 months: 10 months for medium-bore engines and up to 18 months for large-bore installations.
For utilities under pressure to meet reliability standards or renewable integration targets, this faster delivery time offers a critical competitive edge, enabling utilities to respond more quickly to the changing energy demands and market conditions.
We’ve already proven our fast-track capability around the world, successfully delivering large-scale plants on fast-track delivery to help utilities meet urgent demand and avoid costly delays.
Wärtsilä has delivered over 900 megawatts of power generation capacity across Australia and Oceania, supporting the region’s shift toward a more flexible, decarbonised energy future. With offices in Sydney, Perth, and Port Moresby, as well as dedicated workshop facilities, Wärtsilä provides end-to-end solutions and lifecycle support to both energy and marine customers across the region.
In partnership with AGL Energy Limited, Wärtsilä supplied 12 x 50DF dual-fuel engines for the 211 MW Barker Inlet Power Station. Commissioned in 2019, the plant was built for rapid-start operation and high efficiency, playing a crucial role in balancing renewables within the National Electricity Market.
Centrica partnered with Wärtsilä to deliver two 50 MW flexible gas power plants to address intermittency from renewables and provide balancing capacity with under two-minute startup time, supporting the UK’s transition to a decarbonised energy system.
Wärtsilä was selected by the Lower Colorado River Authority (LCRA) to deliver an additional ten Wärtsilä 50SG gas engines, following a previous 190 MW order. With this second phase, LCRA is doubling its engine-based capacity to enhance grid flexibility and provide fast-start support during peak demand.
In partnership with Mexico’s Federal Electricity Commission (CFE), Wärtsilä delivered two large power plants – the 400 MW Mexicali Oriente plant and 200 MW Altar plant – to strengthen electricity supply in Baja California. Despite extreme summer temperatures reaching 50°C and global supply chain challenges, Wärtsilä was able to complete both projects in well under two years from contract signing.
At Wärtsilä, our commitment to customers extends well beyond project delivery. We provide long-term lifecycle services that combine decades of global power generation experience with the latest digital technologies like advanced analytics, artificial intelligence and machine learning. With Wärtsilä as your lifecycle services partner, you can ensure safe, reliable and efficient operations throughout the lifetime of your power plant.
Our remote support solutions, including real-time monitoring and 24/7 remote support through Wärtsilä Expertise Centres, help you to cut operating costs through data and infrastructure optimisation, preventing problems before they occur.
In Australia, Wärtsilä’s 1,800 square metre fully equipped workshop in Sydney provides component overhauls and services for most Wärtsilä products within our area of coverage. Supported by a diverse and experienced field service and workshop team, we are ready to provide 24/7 local support whenever and wherever it is needed.
Whether you're looking for a full operation and maintenance partnership, or targeted performance upgrades, we offer service agreements tailored to your needs:
Ensure safe and reliable operations:
Ensure power plant performance:
Protect your investment:
Wärtsilä is ready to support Australia in building a more flexible, cost-effective, and future-proof power system. If you'd like to discuss how our engine solutions could fit into your plans, get in touch with our local experts today!
Email: paul.george@wartsila.com
Mobile: +61 451 690 762
Email: javier.savolainen@wartsila.com
Mobile: +65 80 771 391
