WIND-POWER GENERATION SYSTEM WITH OVER-SPEED PROTECTION AND METHOD OF OPERATING THE SAME
First Claim
1. 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.
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Accused Products
Abstract
A wind-power generation system with an over-speed protection is disclosed. The system is provided to convert wind energy into mechanical energy by a wind turbine, and mechanical energy is converted into electric energy by the wind turbine driving a generator. Also, electric energy is delivered to a power grid. The wind-power generation system mainly includes an AC crowbar, a fuse, and a DC chopper. 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. Finally, 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.
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Citations
7 Claims
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1. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- the wind-power generation system comprising;
Specification