Wind turbine system with a controller and power supply unit with an energy storage system as well as associated wind turbine and method

A wind turbine system for a wind turbine, the wind turbine system comprising:

• (a) a controller for controlling the wind turbine;
• and
• (b) an energy supply unit with an energy storage system as well as a network connection for connection to a network,
• wherein;
• (i) the energy supply unit is set up to recognize a normal operating mode of the wind turbine in which the wind turbine is connected with the network, and a separated state of the wind turbine in which the wind turbine is separated from the network, and
• (ii) the controller is connected with a wind sensor for acquiring at least one wind parameter, and comprises an azimuth controller for setting an azimuth angle of the wind turbine as a function of the wind parameter,
• (iii) the wind turbine system comprises a DC intermediate circuit and a DC converter,
• (iv) the controller and several azimuth drives are connected with a DC intermediate circuit for energy supply purposes,
• (v) the energy supply unit further has a monitoring device, which is connected with the wind sensor or an additional wind sensor for acquiring wind parameters in the separated state,
• (vi) the energy supply unit with the monitoring device is always connected with the energy storage system so that wind parameters can continue to be acquired in the separated state even in a case where the energy supply unit turns off voltage or energy supply to the DC intermediate circuit, and
• (vii) the energy supply unit is set up in the separated state as a function of the wind parameter acquired with the monitoring device to:
• (1) deenergize the DC intermediate circuit by separating the energy storage system from the DC intermediate circuit, or
• (2) feed energy from the energy storage system into the DC intermediate circuit by actuating the DC converter, in order to supply the controller and the azimuth drives with energy for adjusting the azimuth angle, and thereafter to turn off the energy supply to the controller and the azimuth drives when the wind parameters lie within predefined limits.