System and method for providing gearbox lubrication of a wind turbine during an off-grid state

A gearbox assembly for a wind turbine, the wind turbine being in an off-grid state, the off-grid state characterized in that the wind turbine is mechanically and electrically installed on site, but not yet connected to a grid, the gearbox assembly comprising:

• a gearbox;
• an auxiliary lubrication system fluidly coupled with the gearbox;
• and
• a controller in communication with the auxiliary lubrication system, the controller configured to perform a plurality of operations, the plurality of operations comprising:
• determining a time-based control scheme for the auxiliary lubrication system to provide lubrication to the auxiliary lubrication system during the off-grid state, the time-based control scheme defining a first time period in which the lubrication is provided to the gearbox via the auxiliary lubrication system during the off-grid state and a second time period in which the lubrication is not provided to the gearbox via the auxiliary lubrication system during the off-grid state, the first time period being less than the second time period;
• and
• implementing the control scheme for the auxiliary lubrication system to provide the lubrication to the gearbox of the wind turbine during the off-grid state.