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AssigneeIngeteam Power Technology, S.A.
InventorsJorge Acedo Sánchez, Ainhoa Cárcar Mayor, Josu Elorriaga Llanos, Jesús Mayor Lusarreta, Susana Simón Segura, David Solé López, Mikel Zabaleta Maeztu, Jesús López Taberna, Luis Marroyo Palomo
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The present invention relates to a method and system for controlling a wind power installation connected to an electrical power grid, in case of a fault in said grid. In the electrical machines that form part of the wind power installation, generators and transformers, it is possible to change the impedance of the neutral closure introducing a plurality of active and passive elements. This limits the currents during the grid fault, thereby reducing the peak torque in the mechanical train of the wind turbines and allows guaranteeing compliance with the network connection requirements, as control of the active and reactive currents is maintained at all times.
A control system for a wind power installation in case of grid faults wherein it increases temporarily the impedance between end terminals of windings of an electrical machine and a neutral point of the electrical machine of the wind power installation by means of at least one rectifier element and one set of active and passive elements, being said one rectifier element and said set of active and passive elements connected in series to said end terminals of the windings, and being said windings of the electrical machine selected from the group consisting of generator rotor windings, generator stator windings and windings of at least one transformer of the wind power installation.
Dependencies are inferred from the claim text.