Control method for yaw lubrication system of wind turbine generator set

The invention discloses a control method for a yaw lubrication system of a wind turbine generator set. The control method comprises the following steps: initializing the lubrication time and the lubrication interval; setting a fixed lubrication time and a lubrication period; correcting the lubrication time and the lubrication interval according to temperature feedback from the wind turbine generator set; when detecting that a yaw system of the wind turbine generator set starts to act, accumulating the lubrication time but not the lubrication interval; when the yaw system does not act, accumulating the lubrication interval but not the lubrication time; every period of time, detecting whether the lubrication time accumulated during the time reaches the fixed lubrication time set above or not; when detecting that the lubrication time during the time does not reach the fixed lubrication time, forcibly performing lubrication for the lubrication period till the lubrication time during the time reaches the fixed lub