Abstract:
The invention relates to a method for establishing a wind turbine generator with one or more Permanent Magnet (PM) rotors. The method comprises the steps of: manufacturing a generator prepared for taking one or more PM rotors, manufacturing one or more rotors comprising a plurality of holding means prepared for retaining PM material, mounting substantially non-magnetized PM material prepared for magnetization in said holding means before or after said one or more rotors are mounted in said generator, connecting a magnetization system for magnetizing said PM material in the generator, and magnetizing said PM material with said magnetization system. The invention also relates to a wind turbine nacelle, a wind turbine comprising said wind turbine nacelle and use of a wind turbine.
Abstract:
The present invention relates to wind energy park connected to an electrical grid, having airborne wind energy systems (AWES, 100), e.g. with kites (101). The wind energy park (WEP) has an electrical DC network (506) connecting the plurality of AWES and a grid converter unit (504) for converting DC to AC, and transmit AC to the electrical grid. The wind energy park control unit (503) controls the AWES to produce electrical power to the electrical grid by alternating between a power production phase, and a recovery phase so to balance the supply of power to the electrical grid according a demanded setpoint. An advantage is that the grid converter may be smaller, as compared to an AC network, because the power is evened out with the negative power from the AWES being in recovery phase. In this way, the invention stabilises the grid and has a grid forming capability.
Abstract:
The present invention relates to a method for estimating the magnetization level of one or more permanent magnets established in one or more permanent magnet rotors of a wind turbine generator comprising the steps of: establishing one or more magnetization sensors at the stator of the generator, connecting said one or more magnetization sensors to measuring means, processing measured data in said measuring means, and establishing values of magnetization. Furthermore the invention also relates to a wind turbine.
Abstract:
The present invention relates a method for optimizing electrical current in a DC link busbar of a power converter system, wherein the power converter system comprises, a first inverter bridge, connected to the DC link busbar at a first end, the first inverter bridge having a first pulse width modulation signal, and a second inverter bridge, connected to the DC link busbar at a second end, the second inverter bridge having a second pulse width modulation signal, measuring a current flowing in the DC link busbar from the first end to the second end, optimizing the current flowing in the DC link busbar by delaying the first pulse width modulation signal and the second pulse width modulation signal from each other with a carrier delay, the invention also relates to power converter and wind turbine with optimizing electrical current in a DC link busbar.
Abstract:
The invention relates to a protection system (28) for an electric generator (9) of a wind turbine (1) comprising at least one current path (27) from the non drive end (29) of the generator shaft (8) to a ground potential (22), and at least one alternating current path (20) from the drive end (30) of the generator shaft (8) to the ground potential. The invention also relates to a wind turbine and use hereof.
Abstract:
The invention relates to a protection system for an electric generator of a wind turbine comprising at least one current path from the non drive end of the generator shaft to a ground potential, and at least one alternating current path from the drive end of the generator shaft to the ground potential. The invention also relates to a wind turbine and use hereof.
Abstract:
A method for estimating the magnetization level of one or more permanent magnets established in one or more permanent magnet rotors of a wind turbine generator includes the steps of: establishing one or more magnetization sensors at the stator of the generator, connecting the one or more magnetization sensors to a measuring mechanism, processing measured data in the measuring mechanism, and establishing values of magnetization. Furthermore the invention also relates to a wind turbine.
Abstract:
The invention relates to a method for establishing a wind turbine generator with one or more Permanent Magnet (PM) rotors. The method comprises the steps of: manufacturing a generator prepared for taking one or more PM rotors, manufacturing one or more rotors comprising a plurality of holding means prepared for retaining PM material, mounting substantially non-magnetized PM material prepared for magnetization in said holding means before or after said one or more rotors are mounted in said generator, connecting a magnetization system for magnetizing said PM material in the generator, and magnetizing said PM material with said magnetization system. The invention also relates to a wind turbine nacelle, a wind turbine comprising said wind turbine nacelle and use of a wind turbine.