Patent ID: 9657718
Date: 2017-05-23
CPC Classifications: F03D,F05B,Y02E

Claim:
1. An extremum seeking-based control method for maximum output tracking of a wind turbine generator, wherein the method is a sliding mode extremum seeking-based control method for realizing maximum output tracking of the wind turbine generator, and the method comprises: first step: comparing an active power p when the sign function sgn(ε) changes, delivering a constant u to a module U 0 /s by calculating wherein U 0 is a rated voltage of the double-fed motor, and t is time, then obtaining a reference value of rotating speed ω r,ref , and comparing the reference value of rotating speed ω r,ref with a real-time value of rotating speed ω r , processing a difference of the ω r,ref and the ω r in a PI proportional differential step to obtain a standard rotor quadrature axis component and then further comparing with a preset value i qr to determine an upper limit Δω* r of variations to the real-time value of rotating speed ω r ; second step: when the sign function sgn(ε) in the first step changes, the constant u is compared with a preset value ρ after being magnified by a factor of Z third step: converting the upper limit Δω* forth step: adjusting a rotating speed of the wind turbine generator based on the maximum variation of mechanical torque ΔT*