As Australia advances toward its net-zero goals by 2050, the renewable energy sector is transforming at pace. With the push for decarbonisation, businesses and governments alike are accelerating to adopt cleaner and more efficient energy solutions.
Some of the biggest challenges?
- Advancement of large-scale renewable projects
- Incorporating renewables into existing infrastructure
- Rapidly changing climate conditions
“Decarbonisation is more than replacing coal with renewables. It’s about designing integrated systems that work seamlessly. WGA’s approach combines feasibility studies, route selection, civil and structural design, advanced power system modelling, lifecycle planning and more,” explains Yan Neo, WGA’s Energy Market Lead.
WGA’s decades of experience empower industries to navigate the complexities of the energy transition. From greenfield developments to wind, solar, and hydrogen projects, to battery and energy storage to retrofitting legacy assets, the national engineering firm’s capabilities run across the renewable energy landscape.
Making way for scalable wind farm design
In 2024, renewable energy contributed to 36% of the country’s total electricity production, according to government reports. Over the years, renewables like solar, wind, hydro, and bioenergy have steadily replaced fossil fuels.
Larger turbines and complicated environments
“The scale of onshore wind farm developments in Australia has grown dramatically. Projects that once featured a few dozen turbines now commonly exceed 100 wind turbine generators (WTGs), with future developments projected to surpass 1 GW in capacity. Larger turbines with rotor diameters of 150 m to 170 m can access stronger, more consistent winds at higher altitudes.” Adds Yan.
With more complex wind farm installations growing across Australia’s vast and varied land, advanced engineering and thoughtful planning become vital. This helps minimise environmental impact and ensures site conditions are well understood before construction begins.
Some of the common site condition concerns include:
- Flat pastoral land calls for careful flood-risk assessments and smart drainage design. The high computational load of testing multiple scenarios poses some unique planning challenges.
- Mountainous terrain presents challenges like creek crossings, rocky geotechnical conditions, and the need to reduce disturbance during construction.
- Access Tracks that link hundreds of turbines introduce another layer of complexity. These routes must be planned with the environment in mind, ensuring construction and long-term maintenance leave as minimal a carbon footprint as possible.
Using advanced tools, digital engineering, and smart modelling assumptions, engineers can navigate these challenges and better protect infrastructure against unpredictable climate.
Battery Energy Storage Systems: The Backbone of Stabilising Generation
Modern wind farms increasingly incorporate Battery Energy Storage Systems (BESS) for grid firming. This integration mitigates wind intermittency, enhances system reliability, and creates opportunities for participation in broader energy markets.
The combination of wind generation and storage represents a significant step toward flexible, resilient renewable energy systems. In off-grid systems, BESS enhances renewable generation dependability by ensuring a continuous supply and minimising reliance on diesel backup. WGA plays a crucial role in this evolution.
“For instance, our work on hybrid projects like the Jundee Wind Farm in Western Australia showcases the depth of our engineering expertise. This project brings together four 6 MW wind turbines, a 17 MW solar farm, and a 12 MW / 13.4 MWh battery system. A combination that significantly reduces reliance on fossil fuels and cuts greenhouse gas emissions by up to 56%.” Adds Yan.
Foundations: The key to Turbine Stability
Wind turbine foundations are among the most complex and high-risk components of wind farm design. They must withstand dynamic loads from wind, rotor torque, and vibrations over decades of operation. Larger turbines impose higher static and dynamic loads, increasing engineering challenges.
Gravity foundations remain the most widely used method in Australia due to their simplicity and cost-effectiveness. They rely on their own weight to resist loads, making them suitable for regions with favourable soil conditions. However, they require significant concrete and steel, raising sustainability concerns.
Emerging alternatives include:
- Ribbed foundations (reduced concrete, but must be weighed up with increased geotechnical and engineering effort)
- Piled raft foundations for weak soils.
- Hybrid/hollow slab foundations, promising up to 30% less concrete and 90% less steel, though still in early trial stages.
Tackling renewable challenges with Smart Engineering
Challenges associated with expanding renewable projects are rarely straightforward. Their sheer scale, remote locations, and diverse infrastructure create unique difficulties. Flood Modelling plays a crucial part in managing these risks amidst uncertain climate conditions.
Flood Modelling“Flooding can submerge transformers, switchgear, and BESS units, causing equipment failure, outages, and significant safety risks”, explains Yan.
Effective flood modelling prevents these problems by protecting assets, ensuring safe and reliable operations, and safeguarding the environment.
Key Challenges
- Limited Data: Remote sites often lack detailed hydrological and terrain data, forcing reliance on mixed-resolution models and increasing uncertainty.
- Large Catchments: Projects spanning vast areas require complex hydrological and hydraulic modelling, including spatial rainfall variability and ARR2019 compliance.
- Asset Diversity: Turbines, substations, roads, and electrical equipment each have different flood immunity requirements, requiring multi-scenario modelling.
- High Computational Load: Running numerous scenarios for large areas is time-consuming and costly, especially when farm dams must be modelled at full capacity without water level data.
WGA turns these challenges into opportunities with smart flood modelling that pinpoints vulnerable areas, guides mitigation strategies, and supports resilient design. Advanced tools like TUFLOW enable high-resolution mapping and sub-grid sampling to improve accuracy and efficiency, while innovative approaches bridge data gaps and reduce computational demands.
Integrating Renewables into existing infrastructure
Many legacy assets, including power plants, industrial facilities, buildings, and transport networks, were never designed with renewables in mind. Retrofitting and adaptive reuse help businesses go green with innovative methods while navigating the complex, cost-conscious transformation.
Where WGA engineers help:
- Designing hybrid systems that blend solar, wind, batteries and existing assets.
- Conducting feasibility studies and grid-integration assessments.
- Optimising system performance and reliability.
“Mining clients are under pressure to decarbonise. We help them pick the right technology mix with solar, wind, or hybrid, and design systems that deliver both sustainability and savings.” Adds Yan.
The road ahead
Australia’s renewable energy journey is accelerating, and engineering innovation is at its core. As turbine sizes grow, storage systems scale, and sustainability targets tighten, companies like WGA can ensure technical challenges do not hinder progress.
From feasibility through to design and construction, WGA delivers comprehensive support at every stage of a renewable energy project. Our key achievements include:
- Engineering expertise: Designed more than 30 wind farms and 1,500 turbines across Australia.
- Specialist capabilities: Geotechnical, foundation, drainage, and substation engineering services.
- Innovation in clean energy: Integrating hydrogen technologies to enable a sustainable energy mix.
- Commitment to ESG: Targeting zero operational emissions by 2040.
Find out more about our capabilities by visiting wga.com.au
