Active power control strategy of wind farm considering fatigue load of wind turbines

Primary Frequency Regulation Strategy Based on Rotor Kinetic Energy of Double-Fed Induction Generator and Supercapacitor

“…By using SCs to provide active power support under low-frequency conditions, Strategy 4 has increased the frequency regulation accuracy of low-frequency conditions by 7%. Although the advantages of the strategy proposed at moderate wind speeds are lower than at low wind speed, according to annual actual wind speed statistics, less than 10% of the operating conditions have wind speeds exceeding 80% or more of the rated wind speed of the wind turbines [13].…”

“…Due to stochastic fluctuations in wind speed within the range of 6-10 m/s, all values surpassing 6 m/s result in corresponding increases in rotor speed, port during low-frequency scenarios, Strategy 4 has enhanced the frequency regulation accuracy by an additional 7%. Although the advantages of this proposed strategy are comparatively lower at moderate wind speeds than at low wind speeds, it is worth noting that less than 10% of operational circumstances experience wind speeds exceeding 80% or more of the rated speed [13]. Therefore, the proposed frequency regulation control strategy remains effective in most cases.…”

“…Based on reference [13], it has been observed that throughout the year, there is a probability of less than 10% for forecasted wind speed to exceed the turbine's rated wind speed by over 80%. Considering this information along with the MPPT curve analysis, it can be inferred that at lower wind speeds, the rotor speed at DFIG's MPPT point is comparatively lower while allowing for a wide range of adjustment on its right side.…”