Patent ID: 7819019

Claim:
A wind turbine testing system for testing at least a part of nacelle components of a wind turbine system including an electrical generator system, said nacelle components being mounted on a load carrying structure of a nacelle of said wind turbine system, said wind turbine testing system comprising a test bench being arranged to hold said load carrying structure of said wind turbine nacelle including said nacelle components, a grid simulation system comprising a power converter system and a simulation controller being arranged to be electrically coupled to at least one of said nacelle components and being adapted for providing a simulated utility grid on the basis of a power supply and at least one control signal established by said simulation controller, and a wind simulation system comprising a wind turbine shaft rotating means arranged to be coupled to a rotating part of said generator system or a generator-related system of a wind turbine nacelle or a part of a wind turbine nacelle located in said test bench.