Station testing method and system for wind turbine generator overspeed protection system

The invention provides a wind turbine generator set overspeed protection system station test method and a wind turbine generator set overspeed protection system station test system, and belongs to the field of wind turbine generator set overspeed protection. A wind turbine generator overspeed protection system station test method is characterized by comprising the following steps: limiting the action of an execution mechanism; setting a rotating speed test limit value of the overspeed protection system, wherein the rotating speed test limit value is smaller than the rotating speed limit value of the overspeed protection system; a reverse dragging method is adopted to control a generator of the wind generating set to drive an impeller to rotate, and an overspeed protection system is tested through alarm of a main control program of the wind generating set. According to the invention, impeller rotation is realized by adopting a reverse dragging method, and the generator can control the rotating speed so as to r