Power management during grid faults

摘要

A method for operating a wind turbine facility during for example a grid fault, the wind turbine facility comprising a power dissipation/storage being adapted to dissipate or store electrical energy exceeding an amount to be delivered to an associated power supply grid during the grid fault. The method includes operating the wind turbine facility in accordance with an allowed amount of electrical energy that can be dissipated or stored in the power dissipation/storage of the wind turbine facility by ensuring that a total amount of electrical energy generated by the wind turbine facility does not exceed a sum of the allowed amount and the amount to be delivered to the power supply grid.

主权项

1. A wind turbine facility adapted to deliver electrical energy to an associated power supply grid, the wind turbine facility comprising:
a generator for converting mechanical energy to electrical energy, the generator being mechanically coupled to a set of rotor blades via a gearing arrangement; an electric power converter electrically coupled to the generator and the associated power supply grid via a grid transformer; power dissipation/storage means being configured to dissipate or store an amount of electrical energy from the generator; and a controller that:
determines a maximum dissipation level or energy storage capacity of the power dissipation/storage means, andoperates the wind turbine facility such that a total amount of electrical energy generated by the wind turbine facility does not exceed a sum of (i) the maximum dissipation level or energy storage capacity and (ii) an amount of electrical energy to be delivered to the power supply grid.