Abstract: Lightning protection system of wind turbine blades formed by various connections arranged on carbon fibre laminates (2) of the blade (1), equipotentialising the surface of the airfoils (4) of the beam (10) via derivations from a main cable (6) using the respective auxiliary cables (5). The auxiliary cables are connected to metal plates (3) which make the direct connection with the carbon fibre laminates (2) and are positioned during the blade (1) laminating and curing process, or they are connected to metal pins, preferably cone shaped, which pass through the hybrid laminate. Around the connections a nanocomposite based conductive resin (11) is arranged. In the case of a hybrid laminate with layers of carbon fibre and layers of fibre glass, the equipotential state of the different layers is achieved using windows, discontinuities or open spaces in the fibreglass layers.

Abstract: The container for the transport of blades is comprised of side walls made of tubular trusses diagonally crossed by stays, the different trusses are coupled at the bottom with a bolt with lock pin and at the top with a nut and screw. Both side walls are joined at the top and bottom by adjustable stays. On the upper part, as well as the stays there are transversal spacers. At the bottom of the container the tables which act as support for the storage and transport of the blades are installed, said tables incorporate retractable and telescopic support feet. Both ends of the container are closed using two types of cover, the front cover has anchor points for two blades and the rear cover has an anchor point for one blade.

Abstract: A predictive maintenance system for wind parks, the wind park comprising a group of wind turbines (Ai), a communications network (RS) and a supervision and control system (ST) The predictive maintenance system comprises a monitoring and processing equipment (SMP) connected to the control system (PLC) of the wind turbine (Ai), such that the monitoring and processing equipment sends alarms through the control system of the wind turbine to the supervision and control system. The invention also refers to a monitoring and processing equipment (SMP) for wind turbines.

Abstract: Wind turbine with a blade rotor (11) which reduces noise by the inclusion of a set (21) of flexible bristles (23), aligned in at least one row, on the trailing edge (15) of the aerodynamic profile of the blades (11) and protruding over it, which allows the pressure fluctuations to be balanced on both sides of the profile of each blade (11) in the direction of the wind flow.

Abstract: The present invention relates to a method for operating a converter system of a wind turbine, wherein the converter system includes converter modules capable of converting electric power produced by a generator to electric power applicable to a utility grid. The converter modules include generator inverters and grid inverters. The method determines the enabling/disabling of the converter modules in response to a parameter related to the variable amount of electric power being produced by the generator. Advantages of the present invention are optimisation of power efficiency of the converter modules and improved reliability of the converter modules. Another advantage is the capability of fast enabling and disabling of the converter modules.

Abstract: In a wind turbine and in a method of operating a wind turbine, the rotor speed and/or the generator power are reduced in response to variables exceeding predetermined values, the variables being one or more of wind direction relative to horizontal direction of main shaft of turbine, turbulence of the wind, or any other variable sensed by one or more sensors mounted on components of turbine.

Abstract: A control system for a double-fed induction generator (DFIG) comprising a rotor (1) having rotor windings and a stator (2) having stator windings connectable to a grid for electric power distribution. The control system comprises a converter (17-0, 171), having a clamping unit comprising at least one passive voltage-dependent resistor element (291, 292, 293, 294) for providing a clamping voltage over the rotor windings when the clamping unit is triggered. The invention also relates to a double-fed induction generator (DIFIG) system and to a method for protecting the converter in a power generation system.

Abstract: Oil flushing equipment has four function modes (40) for machinery with rotating parts: the first fills the machinery (40) with oil from a tank (1), the second re-circulates the oil through the machinery (40), the third empties the oil from the machinery (40) to the tank (1) and the fourth cleans the oil in the tank. All four function modes use the motor pump unit (9) and a sequence of two pressure filters (19) in the equipment. The second and third function modes use a vacuum filter (22) situated between the machine (40) and the motor pump unit (9).