Patent ID: 8000840

Claim:
A method to start up at least a portion of a wind power plant connected to an external grid, the start up is substantially without any energy delivered from the external grid, the wind power plant comprises a plurality of wind turbines, comprising: isolating at least one of the wind turbines from the plurality of wind turbines for start up when the wind power plant is disconnected from the external grid; connecting the at least one isolated wind turbine to a power source local to the wind power plant, configured to start the at least one isolated wind turbine; starting the at least one isolated wind turbine via power delivered from the connected local power source; starting at least one next wind turbine from the plurality of wind turbines via the power delivered from the at least one isolated wind turbine started via the local power source when a stable operation of the started at least one isolated wind turbine is achieved, wherein the power deliverable from the wind power plant is used for a black or a cold start of at least a part of the external grid to establish a voltage and/or the power on the external grid.