Abstract: The invention relates to a method for operating a power system of a wind turbine. The power system comprises first and second parallel connected DC-to-AC converters and at least one transformer, where each transformer comprises a primary section connected to a power line, and where the at least one transformer comprises first and second secondary sections connected to outputs of the respective first and second DC-to-AC converters. The method comprises providing a reactive correction reference, changing first and second reactive powers generated by the respective first and second DC-to-AC converters according to the reactive correction reference, so that one of the first and second reactive powers is increased while the other is decreased with amounts corresponding to the reactive correction reference so that the first and second reactive powers are unequal.

Abstract: The invention relates to a method for operating a power system of a wind turbine. The power system comprises first and second parallel connected DC-to-AC converters and at least one transformer, where each transformer comprises a primary section connected to a power line, and where the at least one transformer comprises first and second secondary sections connected to outputs of the respective first and second DC-to-AC converters. The method comprises providing a reactive correction reference, changing first and second reactive powers generated by the respective first and second DC-to-AC converters according to the reactive correction reference, so that one of the first and second reactive powers is increased while the other is decreased with amounts corresponding to the reactive correction reference so that the first and second reactive powers are unequal.

Abstract: The present invention relates to operation of a wind turbine using a power storage unit, such as a rechargeable battery, to power a group of power consuming units during grid loss. The wind turbine comprises a number of power consuming units being grouped into at least a first group and a second group, a first electrical converter for connecting the generator to the electrical grid, and a second electrical converter for connecting the electrical generator to the power storage unit. Upon detecting an occurrence of the grid loss, the generator is operated to ensure sufficient power of the power storage unit to operate the first group of power consuming units.

Abstract: The present invention relates to operation of a wind turbine using a power storage unit, such as a rechargeable battery, to power a group of power consuming units during grid loss. The wind turbine comprises a number of power consuming units being grouped into at least a first group and a second group, a first electrical converter for connecting the generator to the electrical grid, and a second electrical converter for connecting the electrical generator to the power storage unit. Upon detecting an occurrence of the grid loss, the generator is operated to ensure sufficient power of the power storage unit to operate the first group of power consuming units.

Abstract: A wind turbine ID marker arrangement to enable a wind turbine installation to be identified from the air, the ID marker arrangement comprising a display surface to which a pattern of tiles are removably attached.

Abstract: A wind turbine ID marker arrangement to enable a wind turbine installation to be identified from the air, the ID marker arrangement comprising a display surface to which a pattern of tiles are removably attached.

Abstract: A wind turbine (1) comprising equipment under control is presented, which comprises at least one control system (14, 14A, 14B) for one or more of said main components, (5, 7, 9) of the wind turbine. The control system (14A) is multiplied by at least one further control system (14B) for controlling the same of said equipment under control. A control arrangement, a method as well as uses hereof are also presented.

Abstract: The stator of an electric motor includes a stator lamination bundle which is provided with windings which pass through this and which in the regions projecting beyond the stator lamination bundle form end-windings. An end-winding shielding which is electrically conductively connected to the stator lamination bundle is provided. This shielding is formed by segmented and distanced shielding sections which in each case shield at least one end-winding completely or partly.

Abstract: A method of controlling at least one wind turbine blade during the stopping process of the rotor in a wind turbine system is disclosed. The method optimizes the control velocity of the process in response to one or more feedback values of the system and/or one or more feedback values from the surroundings of the system by altering the angular pitch velocity from 10°/sec during the initial stage of the stopping process to 5°/sec at the final stage of the stopping process. A control system and a wind turbine as well as use hereof are also disclosed.

Abstract: A method of controlling at least one wind turbine blade during the stopping process of the rotor in a wind turbine system is disclosed. The method optimizes the control velocity of the process in response to one or more feedback values of the system and/or one or more feedback values from the surroundings of the system by altering the angular pitch velocity from 10°/sec during the initial stage of the stopping process to 5°/sec at the final stage of the stopping process. A control system and a wind turbine as well as use hereof are also disclosed.

Abstract: A method of controlling at least one wind turbine blade during the stopping process of the rotor in a wind turbine system is disclosed. The method optimizes the control velocity of the process in response to one or more feedback values of the system and/or one or more feedback values from the surroundings of the system by altering the angular pitch velocity from 10°/sec during the initial stage of the stopping process to 5°/sec at the final stage of the stopping process. A control system and a wind turbine as well as use hereof are also disclosed.

Abstract: A method of controlling at least one wind turbine blade during the stopping process of the rotor in a wind turbine system is disclosed. The method optimizes the control velocity of the process in response to one or more feedback values of the system and/or one or more feedback values from the surroundings of the system by altering the angular pitch velocity from 10°/sec during the initial stage of the stopping process to 5°/sec at the final stage of the stopping process. A control system and a wind turbine as well as use hereof are also disclosed.

Abstract: A wind turbine (1) comprising equipment under control is presented, which comprises at least one control system (14, 14A, 14B) for one or more of said main components, (5, 7, 9) of the wind turbine. The control system (14A) is multiplied by at least one further control system (14B) for controlling the same of said equipment under control. A control arrangement, a method as well as uses hereof are also presented.

Abstract: A system for retrieving reports and for extracting selected fields from print data streams that may be modified by a non-technical user to provide for revisions in format and additions of new report formats without any need for programming or knowledge of printer code. An extraction database is provided that contains report format information for each of the report formats in use. The report format information includes one or more extraction fields for each report format and a print position associated with the extraction field indicating the position at which the extraction field is printed in the corresponding report format. A print data stream containing a number of reports is analyzed for the presence of a first report, and the report format information associated with the first report format is retrieved from the extraction database.