Wind energy installation with converter control and method of operation

The system (1) has a generator driven by a rotor (10) with a converter (17) for supplying electrical energy via a combination point into an electrical supply network and a control device (18) with a converter controller. The controller has an input connection for a desired value for the voltage to be output and an additional regulator (7) to whose input the desired voltage is applied and at whose output reactive power desired values are output and applied to the converter controller. . An independent claim is also included for a method of operating an inventive system.