ALTANA

Special application wind turbines

The wind turbine generator converts mechanical energy to electrical energy. These generators were a little unusual not too long time ago, compared to other generating units ordinarily found attached to the electrical grid. One reason is that the generator has to work with a power source (the wind turbine rotor) which supplies fluctuating mechanical power (torque).

There are three general categories of wind turbines:

  • Utility Scale: large turbines, commonly seen in wind farms, up to 2 MW, generating electricity for bulk consumption.

  • Industrial Scale: medium size turbines, often seen in combination with other power generating sources, up to 250 kW used for grid production.

  • Residential scale: small turbines, up to 50 kW, generate electricity for remote locations. The generators use not only enameled wire, but also need a secondary insulation of the winded wire. With the know-how of ELANTAS especially in the field of impregnating resins, we became in the last decade a technology solution provider to the dynamic windmill industry.

The size and construction of these turbines determine the choice of resin. With the wide range of rotor speeds (75-3000 rpm) the conditions in a windmill alternate substantially regarding vibrations, temperature and restricted ventilation. Depending on the windmill type impregnating resins for the generators have to provide different resilience, good electrical impregnation properties coupled with high moisture and chemical resistance - the latter ones are particularly important in high salt water environments such as in developing offshore farms.

Increased performance with ELANTAS

As a global technology leader in impregnating resins ELANTAS currently supplies state-of-the-art windmill generator manufacturers around the world. Using one of our systems one of our customers was able to increase the windmill performance from 5.5 to now 7.0 MW (and even more). Not only the technical advantages in terms of electrical insulation but also processing and EH&S/environmental characteristics of ELANTAS' product program are convincing.

The wind industry tomorrow?

The windmill industry has grown dynamically over the last 10-15 years and international companies are competing for the energy markets around the world. The industry continues to expand globally and develops a full range of more and more efficient wind turbines.

This industry will expand according to all experts. It has been the fastest growing source of power in the world in the 80's and 90's. This will ensure that the numbers and efficiency of wind power turbines will increase in the years to come.