CPC F03D 7/026 (2013.01) [F05B 2270/32 (2013.01); F05B 2270/327 (2013.01)] | 18 Claims |
1. A method for operating a wind turbine during start-up from a non-producing operation mode to a power producing operation mode, the method comprising:
a) setting a nominal cut-in value of a first operational parameter and a connection cut-in value of a second operational parameter of the wind turbine;
b) monitoring the first operational parameter;
c) initiating start-up of the wind turbine when the monitored first operational parameter is higher than the nominal cut-in value;
d) monitoring the second operational parameter;
e) detecting a cut-in transition if the value of the second operational parameter is not reaching the connection cut-in value within a start-up time period or the first operational parameter falls below the nominal cut-in value;
f) detecting a cut-in limit cycle of the wind turbine if more than a threshold number of counted cut-in transitions has been detected, and if a cut-in limit cycle is detected, increase the nominal cut-in value; and
g) repeating steps b)-f) until the second operational parameter reaches the connection cut-in value.
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