Closing the loop: from detection to AEP improvement

Detecting deviations is only the starting point of wind farm performance work.

Every operating wind farm exhibits controllable losses. Their drivers can be identified and understood and, in many cases, corrected. But detection is not the end goal.

Closing the loop means carrying an identified issue from diagnosis to corrective action and measurable improvement.

Doing so requires clear priorities, well-founded corrective requests, defined actions and quantified improvement that translates into measurable energy gains.

From identified issue to prioritised action

Diagnosis only creates value if it leads to clear priorities.

In practice, multiple issues coexist within the same wind farm. Some limit energy yield, others affect turbine behaviour more structurally or recur under specific operating conditions. Without a consistent framework, prioritisation quickly becomes implicit and influenced by visibility rather than relevance.

A structured approach requires assessing each issue along two dimensions: its potential energy implication and its operational severity. Estimated AEP impact provides a quantification of recoverable energy, while severity reflects the persistence, intensity or operational relevance of the issue.

Fig. 1: ExpertWind Insights - Plan of Action view showing alerts enriched with estimated AEP impact and a unified severity score, enabling consistent prioritisation across turbines and farms.

Prioritisation then becomes explicit. It is no longer driven by visibility alone, but by quantified impact and assessed severity.

From prioritisation to corrective action

Prioritisation only matters if it leads to corrective action.

For operators, the objective is clear: correct the issue and restore optimal turbine behaviour.

This requires a clear corrective request, supported by diagnostic evidence and framed for day-to-day operation, whether implemented internally or with service providers or the OEM.

When structured properly, diagnosis translates into a defined action plan and corrective measures progress efficiently until the issue is resolved.

Measuring realised improvement

Corrective action is only meaningful if its impact can be measured.

After a correction is implemented, the question is simple: did it effectively resolve the issue under comparable operating conditions?

Improvement cannot be assumed. It must be demonstrated and quantified using operational data, whether through performance analysis, stabilised turbine behaviour or the disappearance of recurring operational patterns.

Only then does the action become part of the wind farm’s measurable performance improvement.

Fig. 2: ExpertWind Insights - AEP Simulator estimating potential energy gains from resolving specific alerts and quantifying recovered energy from corrected issues.

How ExpertWind supports closing the loop

Connecting diagnosis to corrective action and quantified improvement has always been a core principle of our approach. In our latest Insights release, we introduced several features to reinforce this structure.

Alerts now provide both an estimated AEP impact and a unified severity score, visible in the Plan of Action and within each diagnosis page. This enables consistent ranking by potential energy consequence and operational significance, supporting structured prioritisation at turbine, farm and fleet level.

The new AEP Simulator further strengthens decision-making. It estimates the potential energy gain from resolving specific alerts or applying manual improvements based on operational data, and quantifies recovered energy after alerts are resolved. Expected and realised AEP improvements are thus directly linked to corrective actions.

In parallel, expert support and follow-up have been structured more clearly within Insights. Discussions, agreed actions and reports are recorded through integrated meeting notes and a chronological farm timeline, ensuring that diagnosis and corrective requests remain visible and trackable over time.

Fig. 3: ExpertWind Insights - Farm Journal timeline, introduced in v1.2, providing a chronological view of alerts, expert discussions, agreed actions and monthly KPIs to support structured follow-up.

Together, these developments reinforce a disciplined performance workflow in which issues are prioritised consistently, actions are clearly defined and improvement is translated into measurable energy gains.

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