Operation of a wind farm

After the construction of a wind farm will be a test phase and the connection to the transmission network. Then the commissioning of the wind farm begins.
The control of the different areas – security, maintenance, repair and operation is referred to as technical management and the control of economic processes as a commercial operation.

For the optimization of a wind farm investment after the planning and construction of the proper management is crucial – by anticipatory action, the system availability can be significantly increased.
Some corporations that have wind farms, have no intention to monitor the operation of their wind farms. In this case, contrast is often awarded to traditional power plants, the operation and maintenance of wind farms to appropriate specialists. The extent of the tasks will be tailored to the needs of the wind farm owner.

The team of Max Renewables can ensure with over 15 years of experience optimizing operational management.

Economical operation and maintenance
The primary goal of management is to reduce the emergence of cost per megawatt over the life of the system to a minimum. This can be achieved by the following strategies:

-Minimizing the operation, maintenance, and repair costs
-Increasing the energy yield and increase the economic profitability through optimization of the sales price
-The reduction of the insurance risk
-The protection of plants

A. Technical management

Among the individual services in the technical management by Max Renewables:

Ongoing monitoring
-Primarily the monitoring and control of all service and maintenance work. A remote monitoring system processes monitored permanently on all the systems. The resulting production data and other relevant data (eg wind speed, weather, status of system components, etc.) can be read into a database and then analysed by our team specialsts. For a variety of data, the filtered and interpreted for the wind farm owners of particular relevance.
-Faults are immediately diagnosed and corrected.

Advanced ongoing monitoring – Condition monitoring

In the current strategies for the management of wind turbines advanced parameters for continuous condition monitoring of a wind farm to be included (so-called condition monitoring).
The advanced parameters can be obtained from the following sources:
-Vibration analysis
-Oil analysis
-Infrared Thermography

Currently, the first two methods are used primarily.
In the vibration analysis also embedded strain gauges are used in blades, nacelles and other highly stressed parts in order to measure changes in the dynamics of the components can. This can help you make an informed decision, whether a part needs to be replaced prematurely.

Trends of the change of state of the individual components and derived predictions can be made of errors from the data obtained.
The enhanced on-going monitoring requires sensor use with an increased data analysis result.

Early errors can be corrected quickly and easily. Thus, the number of larger operations is reduced, which results in high cumulative cost savings result. Larger bets mean lead time (standstill), transport, crane fees and the cost of components (spare components) as well as wages. If larger inserts minimized, leads to significant cost savings and improved plant availability.
Often insurers grant discounts, provided that the use of condition monitoring is detected by the operating companies.


A wind farm is inspected regularly. This is usually done every three months.
Max Renewables recruits experienced technicians.
-All necessary inspections and tests, eg Security checks are scheduled recurring and carefully carried out.
-Coordinate the maintenance of transformer stations, substations and line paths;

-Start-up and completion of the warranty General inspections are carried out with expert accompaniment and special documentation

Scheduled Maintenance and Repair
In addition to regular inspections and scheduled maintenance must be performed and failed components must, unless they are security or operation relevant, be replaced immediately.

Thus, the loss of production can be kept low, regular maintenance should be carried out in low wind periods; unforeseen repairs must be carried out quickly to keep downtime to a minimum.

However, experience has shown that most of turbine outages can occur in high-wind periods.
In a strong wind period can represent a one percent loss of availability a significantly higher power generation loss – therefore it is imperatively important to work accurately, to organize and supervise.

The stockpiling of essential parts in the site may prove to be an advantage because of the leader in the procurement of spare parts.

Other services maintenance

– Regular communication with the electricians on site and the professionals of the electricity supplier
-Perform required 15 or 20kV switching operations;

-Coordination of care measures / winter maintenance of the outdoor facilities (maintenance of roads and crane shelves)

-Reporting: We create monthly and yearly management reports and technical management, machine documentation and components lists are kept up to date.

-Communication with land owners / tenants
-Communication with authorities or utilities

-Renewal investment / replacement parts when the warranty or the service contract: solicitation, plausibility test and Cost Comparison


The technical management guarantees a
24-hour alert. Depending on the case of an alarm, a local or triggered by remote control restart is either required or on-site technician diagnosis of the alarm and rectification of the fault.
For problems at the site we are extremely fast. These include heavy weather phenomena (eg flooding), infiltration of unauthorized persons, damage due to vandalism or accidents.

B. Commercial management

Reporting on the operation and the performance of the park will be made monthly and yearly. It includes a comparison between electrical power (in MWh), income, expenditure and budget, inspections, scheduled and unscheduled maintenance, availability, performance factors, alarm triggers, as well as special events with a downtime result.

1 Increase in revenues

The commercial management includes the economic control of the operation.
On the one hand, the optimization of the sales proceeds payable. In Germany the importance of the direct marketing of electricity rises; in Poland yields can be increased by improving the sales proceeds of green certificates.
The more MW we produce, the higher the revenue. The wind we can not control, but rather the availability of the wind farms. Offer manufacturers usually within the warranty period an availability guarantee of 97%.
A well-run wind farm can achieve performance levels 97-99 percent. All the technological components are perfectly selected and the management Director will be in a father to child relationship. He will know by heart all the important data and provide analyzes that go far beyond a remote monitoring and remotely supervised through a large and Database-driven management.
For larger wind farms (from 100 MW) can mean to availability a value of 200-350 thousand euros extra revenues per year, every percentage point. A trend towards performance-based management contracts is the additional yield that is achieved by the increased availability, divided between the park owner and operator.

2 Optimization of costs

The local costs of management (parking attendant, ground maintenance, winter maintenance, maintenance of roads, etc) and ongoing costs such as insurance, Self power consumption and management are manageable. The lease for the land owners are fixed for 29 years and inviolable.
The largest cost of the wind farm are the maintenance and repair costs, and financing costs. The latter are controlled by the investor. In the commercial management is the optimization of the maintenance and repair costs.

The first years of operation are subject to the warranty period, only the cost of labour for maintenance must be paid. However, the calculation of a wind farm comprising 15-20 years; the invested capital flows, depending on the wind site and the respective costs of the project back in about 9 to 13 years.
If 10 million euros invested in a wind farm, then fall as costs for maintenance, repairs and replacement of major components in the first 15 years of operation, an additional 5 to 6.5 million euros. This is the largest single cost that has to be optimized.

The supposedly high security provide fully integrated maintenance concepts that are offered by many wind turbine manufacturers. This must be paid on income.
This is the owners risk, but at a high price, diminished. As with any other insurance, a surcharge is paid to the associated actual costs, so the risk is exactly calculable.
In the course of a full-service insurance are paid throughout the period uniformly high amounts; the seizure of the replacement of major cost-intensive parts (gearboxes, rotor blades, etc.), however, is increasingly recorded from the 10th year of operation. In the time before the WKA Manufacturer thus collects only the money that he then held in stock for future expenses.
We were often of banks noted that WKA manufacturers represent an economic risk.
A full service maintenance contract lasts for 20 years. Maintenance costs are deposited from year 3-15. The predetermined maintenance takes place between years 12-18 where the investor receives a payback on his maintenance costs.
As can be concluded that even with good plant knowledge itself reserves may be established to represent the long-term maintenance cost effective than full maintenance concepts.