Wind-power generation system with over-speed protection and method of operating the same

A wind-power generation system with an over-speed protection providing a wind turbine to convert wind energy into mechanical energy, the wind turbine driving a generator to convert the mechanical energy into electric energy, the electric energy delivered to a power grid to provide a grid connection between the wind-power generation system and the power grid;

• the wind-power generation system comprising:
• an AC crowbar electrically connected to the generator;
• a fuse electrically connected to the AC crowbar and the generator;
• a generator-side converter electrically connected to the fuse to provide an AC-to-DC conversion of electric energy;
• a DC chopper electrically connected to the generator-side converter;
• a grid-side converter electrically connected to the DC chopper to provide a DC-to-AC conversion of electric energy;
• a grid-connected filter electrically connected to the grid-side converter to filter electric energy;
• and
• a transformer electrically connected to the grid-connected filter and the power grid to convert a voltage level of the electric energy of the grid connection between the wind-power generation system and the power grid;
• wherein the AC crowbar or the DC chopper is provided to consume superfluous energy outputted from the generator, thus providing an over-load operation to brake the wind turbine when the wind turbine operates under a first stage over-speed operation;
• the generator is isolated from the generator-side converter by disconnecting the fuse when the wind turbine operates under a second stage over-speed operation.