OPERATING COSTS REDUCTION
SERVICE LIFE EXTENSION
From ice detection and reduction of tonalities to structural health monitoring (SHM) on blades, towers or foundations – in the field of wind energy we offer professional services and system solutions to increase yields, extend the service life and optimize inspections. We are experts in vibration and signal analysis, provide information on structural damage and the associated service life of your wind turbines, monitor material fatigue and help you to comply with legal requirements regarding noise emissions.
Vibrations can therefore cause additional costs in several ways and lead to yield losses. As a rule, they cannot be completely avoided, but they can be significantly reduced. There are various methods of reducing vibrations, including the use of passive and active absorbers. As experts in vibrations and acoustics, we have extensive experience in this field and have specialized in solving vibration problems with our sound knowledge of structural mechanics and dynamics.
Reducing vibrations and thus avoiding extreme loads is essential, especially with regard to a possible continued operation after the design lifetime has expired. By using Structural Health Monitoring (SHM) systems, the remaining service life can be calculated on the basis of the fatigue loads that have actually occurred, the design model can be optimized and thus a well-founded decision can be made about the continued operation.
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In daily use by a large number of manufacturers and operators, our solutions and systems make a significant contribution to increasing yields and to the safety and acceptance of wind turbines. Together with partners and experts, we are continuously working on the further development of our product range.
We have been developing intelligent algorithms for signal analysis for more than 40 years and integrate additional operating and environmental conditions in the evaluation. This is what we call Structural Intelligence. The result is detailed knowledge of the state of the structure. On this basis, diagnoses can be made, risks calculated, forecasts made and clear recommendations for action derived.
However, we do not only offer tools for analysis. From the planning and conception of an SHM system to the installation and commissioning through to the preparation and visualization of the collected data, you receive all services from a single source.
Exploiting the potential of a wind farm in the best possible way – this is not only the overriding goal of manufacturers and operators, but is also essential with a view to achieving the fastest possible energy turnaround. In our white papers in the categories Increase yields, Optimize inspections and Extend service life, you can find out how you can sustainably increase the efficiency of your wind turbines:
The investment costs for offshore wind turbines are generally higher than for turbines on land. With a view to rapid amortization, efficient and trouble-free operation is essential. Structural Health Monitoring (SHM) allows for damage to be detected at an early stage thus minimizing downtimes tor even completely avoiding them.
SHM can also reduce the number of usually expensive, risky and weather-dependent visual inspections (periodic inspections) to the minimum recommended by the Federal Maritime and Hydrographic Agency (BSH). Ideally, inspections are not carried out periodically, but on a risk basis. Errors with a high risk of failure or damage are identified and prioritized, and targeted inspections can be planned with foresight.
Making the right diagnoses and making reliable forecasts has always been our core competence. In our web portals MIC.Foundation, MIC.Tower and MIC.Blade, we consolidate and cleanse data from various sources. We evaluate them, relate them to each other and prepare them in a dashboard so that the user can recognize the condition of the wind turbine at a glance and take appropriate action.
"(...) the Wölfel inspectors have proven their very high professional and social competence.
The solution-oriented approach completes Wölfel's competence. We appreciate the trusting
and we look forward to any future cooperation."
Niko Gehbauer, Dr. Pascal Sommer,
EnBW Energie Baden-Württemberg AG
"TMD.Tower® is our absorber with innovative, patented eddy current damping. This technology,
used by Siemens Gamesa in several hundred offshore wind turbines, has been proven to enable robust,
effective and economical vibration reduction on offshore wind turbine towers."
Siemens Gamesa Renewable Energy
"ABO Wind is one of the first users of ice detection with IDD.Blade and accompanied as a technical operator the retrofitting of 17 wind turbines
in 3 wind farms. To date about 100 wind turbines are equipped with IDD Blade in the technical management of ABO Wind. The reliability
and continuous development of the systems is very much appreciated – this ensures efficient operation even in the winter months."
"Wölfel offers flexible and efficient structural health monitoring that can be individually integrated into our system
depending on the monitoring requirements. In the field of structural health monitoring, we see Wölfel as one of the leading international
companies with whom we maintain close cooperation and support our systems in numerous wind farms."
BECKHOFF Automation GmbH & Co. KG
"IWB equipped a wind turbine with the Wölfel IDD in 2016. Already in the following winter the expectations for the
system were exceeded. Wölfel IDD detects ice so precisely that the assumed payback period was undercut.
In the following year, the remaining systems were also retrofitted with the IDD."
"Wölfel’s Structural Health Monitoring System, which is installed on all foundations of our wind farm,
supports the condition-based planning of our structural inspections and thereby helps us optimize our operational costs."
Northland Deutsche Bucht GmbH
"Wölfel was one of the first companies on the market with the competence to offer monitoring for offshore structures. Wölfel has been supporting us for many years, from the design of the system to the delivery and installation of the sensors to the data analysis and engineering evaluation of the results. Our experience with the Wölfel system was very good."
According to the Federal Immission Control Act (BImSchG), wind turbines with a total height of more than 50 meters must receive approval. Among other things, an immission forecast must be submitted in advance and a verification measurement carried out after commissioning. Tonalities can also lead to the approval limits being exceeded. With the help of active vibration reduction, however, the turbines can still be operated without loss of yield.
At so-called "cold climate" sites, there is also an increased risk of ice Shedding. In order to ensure all in the vicinity is protected from this, wind turbines must be halted as soon as the rotor blades are frozen. Special ice detection systems automatically stop the turbine when ice is detected and restart it as soon as it is ice-free again.
The vibrations emitted from wind turbines can also influence the measurement results of seismological stations. For this reason, the Geological Service must be involved in planning and approval procedures within a radius of ten kilometers in North Rhine-Westphalia. In order to reduce seismic emissions from wind turbines, a passive vibration absorber can be used. Depending on frequencies and amplitudes, vibrations can significantly be reduced, even with low absorber masses.
In daily use by a large number of producers and operators, our solutions and systems make a significant contribution to increasing yields as well as to the safety and acceptance of wind turbines. Together with partners and experts, we are continuously working on the further development of our product range.