Wind turbines

Systems enable a reliable conversion of wind into electrical energy in wind turbines. The optimized and application-oriented design for the respective function required ensures a considerably prolonged service life for components and machines. HYDAC subsystems support the modules and secure the technical availability of your WEC.

Rotor vane adjustment (Pitch System)

After the nominal speed has been reached on the generator (nominal performance), the optimum setting angle of the rotor vanes is modified individually as the rpm increases, thus worsening the degree of aerodynamic efficiency. As a result, the rpm is slowed down while the operating point of the generator torque is maintained. This procedure is referred to as pitching.
 

Main gears

Gears are positioned in front of the generator. In order to generate electrical energy, the asynchronous or synchronous generators must be kept at a constant rpm. Because of the slowly turning rotors, transmission ratio is used to bring the rpm up to the maximum required generator rpm. HYDAC lubrication and cooling systems ensure safe and reliable availability of the gears.

Generators, converters and transformers

The generator of a wind power plant converts the mechanical energy of the rotor movement into electrical energy. However, fluctuating wind speeds cause the alternating current generated by the generator to also be subject to fluctuations. In order to be able to feed electrical energy into the electrical network, this electricity is treated with a converter for the supply network. The heat which arises during this process is channeled away through a cooling system.

Separate cooling circuits are strived for with the transformer cooling system, because here a separation of the surroundings and ambient air with all types of contaminations (dust, salt-bearing air, particles, etc.) from the interior, enclosed cooling circuit can be secured.

Braking systems

The hydraulic pressure supply to the brake systems is supplied, either centralized or decentralized, by HPU (Hydraulic Power Units). The drive train brake acts on a brake disk connected by either shaft or coupling, and acts as the secondary braking system in wind power plants which have a pitch system. Due to safety considerations, bolts or slides are locked by means of hydraulic cylinders for maintenance work in or on the rotor. The gondola (engine house) is maintained in position by means of an azimuth brake system. Compact hydraulic power units supply the energy for the hydraulic brake systems.

Azimuth direction angle

The rotation of the gondola on the tower is implemented by means of either electrical or hydraulic actuation. In the case of hydraulic actuators, this energy is also drawn from the hydraulic system. On hydraulic drives, these also receive their energy from the hydraulic system.

 

 

Mounting technology

The robust and modular design of the mounting systems which were specially developed for this application ensures an installation of the power cables in the tower which is not only simple and professionally correct but also optimized in terms of both time and expenditure, with "lying tower" pre-installation and final installation in the "erected tower". The modular system also permits great flexibility with respect to quantity and alignment (individual, bundles of three, static, flexible) of the power cables in the tower, in the transition to the gondola, to the loop and also in the engine house itself.

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