Preventive maintenance Since weather conditions may prevent service personnel from approaching the wind turbines at times of bad weather, it is extremely important to ensure a high availability rate of offshore wind turbines. Preventive maintenance check programmes may need to be optimised for remote offshore locations.
Remote Surveillance Remote surveillance of the parks will obviously be even more important than on land. Radio links for this purpose have already been in operation at the Tunoe Knob and Vindeby offshore wind parks for some years.
With the the large 1.5 MW units foreseen for these parks, it may be economic to install e.g. extra sensors on each piece of equipment, (and continuously analyse its minute vibrations which tend to change their pattern as the part is worn down). This technology which is well known in certain parts of industry to ensure optimum maintenance of machinery.