Extended operation of Wec (EAW)

The operating time of a wind energy converter (WEC) depends initially on the design durability of the relevant type and unit testing (often 20 years).
An extended operation of the installation beyond this time period is possible as long as in the course of an “evaluation and assessment with regard to the extended operation” (EAW) proof can be given that the required conditions are met.
For the calculation of eventual remaining reserves (for example through low wind loads, downtimes etc.). The calculated proof fills the gap of the earlier validity of the load assumptions from the type and unit testing after its expiry. Im The practical inspection is similar to a periodic inspection in scope with detailed analysis of the thematic complex 'fatigue'. Depending on the respective type of WEC and its specific risk potential, different methods or


surveillance procedures can be applied here, complimentary to the usual scope of a periodic inspection. It also takes into account the fact that a large number of the current technical regulations on the manufacturing, construction and operation of a WEC could only be written after the start-up date of the installation to be inspected, and, thus attained their validity. The object of the inspection is therefore an individual analysis of the possible risks that arise with the continued operation of the WEC with a special focus on the operating time already reached and the specific operating conditions. It can be shown on the basis of the report submitted whether the WEC is suitable for further operation, measures for risk avoidance are required, other conditions connected with the continued operation of the WEC are necessary.

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