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A guide to wind farm performance – What you need to know

Expectations of wind farm performance are defined and negotiated before financial close of a project in order to minimise financial risk. However, the actual performance of a wind farm can vary compared to these budget expectations. Reasons for this variation can include: wind resource, availability, power performance, curtailments and uncertainties in the long term energy forecasts. Each of these factors will be covered in this course.


Malcolm Heath Malcolm Heath
Senior Engineer
Asset management

Training Information

  • Course offer:

    This course is available on request

Additional information:
The turbine supplier will usually provide a guarantee of power curve and availability levels. Performance verification procedures and power curve warranties are defined in the turbine supply and service and maintenance contracts. During operation the verification test procedure can be used to demonstrate that the turbines are within the acceptance levels and to quantify the uncertainties. The course will review typical approaches, including those defined in the IEC 61400-12-1 and 12-2 standards. To complement the warranties and formal procedures, the wind farm performance may be optimised and tracked through live operations monitoring and periodic detailed analysis. The SCADA data continuously recorded by each turbine and met mast on the wind farm can be interrogated to track performance and monitor the health of turbine components. The course will explain the value of SCADA data and how to leverage this to proactively manage performance.

The course also includes live and interactive demonstrations of tools used to monitor and optimise the performance of turbines.

The course allows attendees to benefit from DNV GL’s extensive experience of project due diligence, performance optimisation and wind farm operation, and avoid common mistakes and misconceptions.

On completion, delegates should understand the most significant factors affecting wind farm performance and how to measure them. Specifically: how an operational wind farm’s long term energy yield is assessed; what performance factors appear in contracts; how turbine performance is measured; how wind farm performance can be optimised and monitored.

Course outline:

  • Ideal performance
    -Long term energy yield: pre-construction and post-construction
    -Warranties in contracts
    -IEC standards
  • Real performance
    -Reconciling pre- and post-construction forecasts
    -Budget energy versus actual energy
  • Performance test procedures and standards
    -Power performance 61400-12-1 series
    -Availability 61400-26-1 series
  • Curtailments
  • Optimising performance using SCADA data
    -Real availability
    -Real power curve performance
    -Condition monitoring
  • Monitoring site activity and performance
    -Site access control
    -SCADA analysis tool
    -Portfolio management systems
    -Short-term forecasting
  • Q & A session

Who should attend?
Developers, operators, lenders and other professionals who wish to benefit from DNV GL’s technical and commercial knowledge.

Contact information: Please email malcolm.heath@dnvgl.com for more information.