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METHOD FOR CONTROLLING A POWER-GRID CONNECTED WIND TURBINE GENERATOR DURING GRID FAULTS AND APPARATUS FOR IMPLEMENTING SAID METHOD
METHOD FOR CONTROLLING A POWER-GRID CONNECTED WIND TURBINE GENERATOR DURING GRID FAULTS AND APPARATUS FOR IMPLEMENTING SAID METHOD
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机译:电网故障期间电网并网式风力发电机的控制方法及实施方法
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摘要
The present invention relates to a method and an apparatus for controlling a power-grid connected wind turbine generator during grid faults. During grid faults, the stator windings of the wind turbine generator are disconnected from the power grid and impedances for dissipating at least part of the power generated by the wind turbine during grid fault condition are connected to the stator windings. In this way, a certain magnetisation of the generator can be maintained and after removal of the grid fault condition, the generator is synchronised to the power grid and the impedances are disconnected and the stator windings are reconnected to the power grid. In this way, it is possible to keep the wind turbine generator at least partly magnetised during grid faults and thus ready for delivering power to the power grid, as soon as the grid voltage is re-established after the fault.
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