| CPC H02J 3/381 (2013.01) [F03D 7/044 (2013.01); F03D 9/11 (2016.05); H02J 7/00714 (2020.01); F05B 2220/7062 (2013.01); F05B 2260/42 (2013.01); F05B 2260/80 (2013.01); F05B 2270/337 (2013.01); F05B 2270/502 (2013.01); F05B 2270/706 (2013.01); H02J 2300/22 (2020.01); H02J 2300/28 (2020.01); Y02E 10/72 (2013.01); Y02E 70/30 (2013.01)] | 20 Claims |
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1. A wind turbine comprising:
a rotor to generate an electric current in a generator,
an electric flow path configured for conducting the electric current to an electric grid;
a battery storage electrically connected to the electric flow path, the battery storage including a plurality of battery cells, each battery cell including at least one battery element and four semiconductor switches; and
at least one controller configured to control a voltage over the battery storage by controlling a status of the respective four semiconductor switches of multiple respective battery cells of the plurality of the battery cells, whereby:
a current path is controlled to bypass at least one respective battery element of one or more of the multiple respective battery cells, or
the current path is controlled to pass through the at least one respective battery element of the one or more of the multiple respective battery cells,
wherein the control of the respective four semiconductor switches of the multiple respective battery cells facilitates: changing polarity of the electric current in a point of connection of the multiple respective battery cells to the current path, the current path of the battery storage being connectable to both of an AC or a DC part of the electric flow path,
wherein the controller is configured to control of the voltage over the battery storage by a combination of different battery cells, and
wherein the combination is established by a state of charge evaluation of the battery cells.
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