Ingeteam Power Technology, S.a.

Universidad Pública De Navarra

Jesus Lopez Taberna

Luis Marroyo Palomo

Mikel Zabaleta Maeztu

Carlos Girones Remirez

Ainhoa Carcar Mayor

Eneko Olea Oregi

Eduardo Burguete Archel

Francisco Javier Chivite Zabalza

Eugenio Gubia Villabona

Luis Maria Marroyo Palomo

Pablo Sanchis Gurpide

A wind turbine that includes a housing, an asynchronous generator disposed in the housing and configured to be electrically connected to a power grid connection; a power converter circuit disposed in the housing and configured to be electrically connected to the asynchronous generator; and a variable impedance device disposed in the housing, connected to the generator and configured to limit current by varying impedance in response to a transient current. The wind turbine delivers reactive power to the power grid when the variable impedance device varies impedance in response to the transient current. The variable impedance device can be arranged in series between the asynchronous generator and the power grid connection, or can be in a shunt arrangement between the asynchronous generator and a neural point.

Variable impedance device for a wind turbine

The present invention relates to an energy conversion circuit comprising a switching stage with a positive DC voltage terminal (), a negative DC voltage terminal (), m&#x2212;1 intermediate DC voltage terminals () m DC bus capacitors (); and p linked cells consisting of m+1 switches () and at least one capacitor (), connecting cell 1 to the positive DC voltage terminal (), negative DC voltage terminals () and intermediate DC voltage terminals (); and a multilevel converter, the output of which is connected to the AC voltage terminal (), with a positive voltage terminal () and a negative voltage terminal () of the multilevel converter and m&#x2212;1 intermediate voltage terminals of the multilevel converter (), which are connected to the positive output terminal of the switching stage (), to the negative output terminal of the switching stage (), and to the m&#x2212;1 intermediate output terminals of the switching stage (), respectively.

Switching stage, energy conversion circuit, and conversion stage for wind turbines comprising the energy conversion circuit

Method and system of control of the converter of an electricity generation facility of the type which comprises at least one electric generator, such as a wind generator, connected to an electricity network, in the presence of voltage sags in said network, the electric generator being a double-fed asynchronous generator formed by two windings, a winding in the stator, directly connected to the network, and a winding in the rotor which is fed on normal regime by said converter which imposes on it a predetermined voltage current called setpoint current. In the event of a voltage sag occurring, the converter imposes a new setpoint current which is the result of adding to the previous setpoint current a demagnetizing current which generates a flow in the rotor winding opposed to the free flow, consequently reducing the voltage in converter connectors.

Method and system of control of the converter of an electricity generation facility connected to an electricity network in the presence of voltage sags in said network

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Pamplona, Spain

Jesus Lopez Taberna