Anomaly – Initial damage – Breakdown Wind energy systems (WES) as a whole and their components are exposed to the so-called stochastic environment (wind and weather). Combined with the widely changing operating states of the different system components, even WES that are located at a distance of only "a few meters" of each other show the most varied characteristics during technical inspections.
This hampers the identification and evaluation of damages that in the long run might only be remedied by replacing the respective component.
But frequently the replacement of the damaged component is not sufficient, for the entire system can be interrupted strongly and other, previously sound components can fail.
This leads to doubts whether the faulty components should have been replaced in the first place. This decision can be taken by experts who consider the WES holistically.
Benefit to the Customer But experts should not only be consulted in such cases, because
- if WES are tested regularly, faults can be identified on time, and so in the case of serious faults, the breakdown of a WES can be avoided,
- to test a WES before the manufacturer's guarantee expires means you avoid unnecessary trouble,
- to check the completed WES means you can identify faults and faulty workmanship soon after start-up,
- to carry out site-oriented analyses saves resources and finances, because you do not have to wait until a fault occurs, but can replace components in time and on demand,
- a component should only be replaced if it is actually faulty.
Important: Our experts see the WES as a whole.
Goals of Technical Inspections
- to identify the current technical state of the WES,
- to identify and specify initial damages,
- to avoid secondary damages by the early identification of damages,
- to document in written form the findings of the technical inspection and other examinations. They contain the necessary information about the state of the WES and/or maintenance recommendations for the operator.
Implementation The technical inspection includes the review of documents (identity of the WES, requirements of the construction permit, maintenance specifications etc.) and the visual inspection of individual components (base, tower body, engine house, power train, rotor blades, safety equipment, yaw system, hydraulic equipment, control) and a functional test of the components. During the visual inspection the components are checked for their state (corrosion, cracks, damages, wear, leakages, safety labelling etc.). The functional tests mainly extend to the safety and control equipment and the sensors and the control and signalling of the WES.
The inspection and its results are documented in an inspection report and delivered to the customer. This report also contains advice on recommended or necessary repairs. If the repair or modification of a safety-relevant component is required, another test by an expert can be requested.