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Prasenjit Das
Lead, Grid edge initiative, Manufacturing and Utilities CTO group
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Many countries are relying on wind energy among other renewable resources to tackle climate change and reduce carbon emissions.
Wind energy is a capital-intensive sector and wind turbines, like any other asset, require regular operations and maintenance (O&M) to prevent unplanned breakdowns and repairs. The average shelf life of a wind turbine is 20 to 25 years. This means that many onshore wind farms in Europe and the US installed before the year 2000 have already reached the end of design (EOD) life. Wind farm operators will need to find more profitable ways to run their business or risk decommissioning wind assets and writing off the investment.
The proliferation of new digital technologies has given operators an opportunity to increase the useful life of wind turbines and optimize the power yield. According to WindEurope, out of 22GW of wind power that is coming to its EOD life, 18GW will be eligible for lifetime extension (LTE) projects.
Traditional O&M activities centered around routine operations and scheduled maintenance rely on reactive decision making with the hope that everything is working fine.
In worst-case scenarios, undetected problems would result in expensive corrective actions. In fact, O&M accounts for approximately 10 to 20% of the total energy cost for a wind project. In addition, many wind farm owners signed expensive maintenance contracts to fill the O&M skill gap. While monitoring systems such as SCADA (supervisory control and data acquisition) have been used for a while on wind farms, what’s missing is the sophistication needed to arrive at insightful decisions during the early stages of a problem. The ability to extract information from data and interpret outcomes for early detection of failures is critical. Digital O&M has now made this possible, giving wind operators more control over turbine performance.
Digital technologies use data as a vehicle to tackle O&M business challenges, as opposed to using it to define those challenges.
Sensing and capturing accurate raw data is a critical first step. Many wind farms that were commissioned in the last two decades are not equipped with sensors found in modern wind turbines. Unobtrusive computational sensing through radar-based acoustic signature, drone-based imagery, and other related technologies enables multi-sensor fusion for enriching data capture across different components. The next step is employing data management and transformation techniques, including cleansing and merging the data to make it fit for consumption by analytical engines.
Data engineering is just one piece of the puzzle. Data-driven digital twins of the components and their adjoining processes combined with predictive analytics will generate insights on performance to support proactive decision-making and corrective maintenance. When combined with artificial intelligence and machine learning, analytics can mine new parameters and lead indicators from historical data. This data can be tracked and analyzed using advanced algorithms to understand the current and future state of critical wind turbine components.
But analytics will be irrelevant if the data and insights are not available to the operator, engineer, or business stakeholder in the right format and in a timely manner. Many enterprises with a broader O&M vision are using ‘servitization’ by linking analytics with ERP (enterprise resource planning) systems. This ensures a process-driven approach in which information is actionable and triggers the right response.
Wind power represents 4.4% of the total generated power and is likely to increase up to 20% by 2030.
With governments reducing subsidies, wind farms have to find new ways to cut costs and stay competitive. Digital technologies are the way forward. It will reduce downtime, cut O&M costs, and improve the operational efficiency of wind turbines. The result is increased clean energy production at low costs.
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