Method and system for constructing power characteristic curve of wind turbine generator

The invention provides a method and system for constructing a power characteristic curve of a wind turbine generator, and the method comprises the steps: constructing an initial wind speed-power characteristic curve in a current period of time based on the current operation power and the wind speed corresponding to the operation power; based on the historical operation data and the current influence factors, constructing a power composite influence factor matrix; and revising the initial wind speed-power characteristic curve based on a power composite influence factor matrix to obtain a wind turbine generator power characteristic curve in the current period of time; the influence factors comprise the air density, turbulence intensity and yaw error; the influence factor of the wind speed is considered when the power characteristic curve of the wind turbine generator is constructed, and the influence factors of the air density, the turbulence intensity and the yaw error condition are further considered; therefo