Patent ID: 8436490
Filing Date: 2013-05-07
Classification: H02H,H02J,Y02E

Abstract:
1. A wind mill apparatus for generating electric power to a grid point of an electric network, the apparatus comprising a wind rotor, an electric generator operatively connected to the wind rotor, and an electric multiphase ac link connecting the generator to the grid point, the ac link comprising a first current path comprising a switchgear, a second current path comprising a dc link comprising a first converter operatively connected to the generator, a second converter operatively connected to the grid point, a capacitor operatively connected between the conductors of the dc link, a connectable multiphase dump load comprising a transient booster for blocking the reactive power flow in the ac link during a fault condition on the network and providing a reduced transfer of active power, wherein the transient booster is connected in series with the generator between the switchgear and the grid point, the dump load further comprising a temporary surplus power control as resistive shunt element which is temporarily connectable in shunt connection between the generator and the grid point for providing a retardation force on the generator.