Abstract: A method includes receiving, via one or more turbine-level controllers, an indication of at least one of a communication loss between the one or more turbine-level controllers and a farm-level controller, a detection of an absence of reactive power regulation by the farm-level controller, or a reactive power command of the farm-level controller being equal to or above a saturation threshold during transitioning between a baseline operational mode and reactive power mode, the reactive power mode being characterized in that only reactive power is generate. Upon receipt of the indication, the method includes adjusting a reactive power response of one or more reactive power regulators of the one or more turbine-level controllers so as to avoid an overshoot reactive power event or an undershoot reactive power event at the point of interconnection.

Abstract: A hybrid power system (100) comprising a wind turbine (102) having a wind turbine generator and a power converter, and one or more DC power sources (104). The hybrid power system is configured to prioritize active power output over reactive power capability when the wind turbine is not operating, and is further configured to prioritize reactive power capability over active power output when the wind turbine is operating and wind speed is above a predetermined threshold. Methods for operating a hybrid power system are also provided.

Abstract: A system comprising: a renewable power source (1) with a renewable power generator and a controller (40) for controlling the renewable power source, a power converter (30) electrically coupled with the renewable power generator and configured to connect the renewable power generator with an electrical grid, and the power converter comprising a DC link (31), and an energy storage device (50) configured to be electrically coupled with the DC link. The controller is configured to receive a signal from the energy storage device (50) and transmit this signal from the energy storage device to the power converter (30). Further disclosed are methods for connecting a DC link (31) of a power converter (30) with an energy storage device (50) and methods for transmitting information between a power converter (30) coupled to a generator of a turbine and an energy storage device (50).