Abstract: A method of operating a power converter is provided. The power converter includes a rotor side converter configured to be electrically coupled to a rotor of a wound rotor induction generator. The method includes operating the power converter in a grid forming operating mode in which the rotor side converter is operated to control an output voltage at a stator of the wound rotor induction generator in accordance with a reference stator voltage. Operating the power converter in the grid forming operating mode includes deriving, based on the reference stator voltage for the output stator voltage, a reference rotor current for a rotor current in the rotor and controlling the rotor current in the rotor in accordance with the reference rotor current.

Abstract: A method of detecting an islanding operation of an electrical power generating system coupled to a power grid provided. The method includes monitoring a frequency that is indicative of an AC frequency on the power grid and monitoring reactive power on a coupling of the electrical power generating system to the power grid. The monitored frequency is processed to determine a rate of change of frequency, and the monitored reactive power is processed to determine a rate of change of reactive power. A detection parameter is determined from the determined rate of change of frequency and the determined rate of change of reactive power. An islanding operation of the electrical power generating system is detected if the detection parameter exceeds an islanding threshold value.

Abstract: A method and system of subsynchronous oscillations and interactions damping integrated in in a rotor converter based on an adaptive state feedback controller with two spinning vectors, and a Kalman filter whose parameters are optimized by minimizing maximum sensitivity under a constraint of positive damping for a plurality of sensible scenarios is provided. The damping signal generated by the damping module is applied either to a power proportional integer controller or to a current proportional integer controller.

Abstract: A method and system of subsynchronous oscillations and interactions damping integrated in in a rotor converter based on an adaptive state feedback controller with two spinning vectors, and a Kalman filter whose parameters are optimized by minimizing maximum sensitivity under a constraint of positive damping for a plurality of sensible scenarios is provided. The damping signal generated by the damping module is applied either to a power proportional integer controller or to a current proportional integer controller.