MPPT Algorithm for Power Flow Generation Based on Improved Variable Step Mountain Climbing Method
Aiming at the problems that the traditional variable step size climbing method has poor adaptability to the sudden change and random fluctuation of tidal current velocity in tidal power generation system,and is prone to disturbance direction judgment error and speed tracking too fast,an improved variable step size maximum power point tracking(MPPT)algorithm is proposed based on the variable step size climbing method.The method can accurately judge a variety of maximum power tracking conditions and use the change degree of power and speed under two sampling points to determine the size of the next step,and automatically adjust the size of the step according to the size of the energy acquisition coefficient in stages to deal with the sudden change of tidal current velocity,so as to achieve maximum power tracking.A simulation system based on PID control and active disturbance rejection control is built in MATLAB/Simulink environment for simulation experiments.The results show that the improved variable step size climbing method not only can achieve maximum power tracking,but also has stronger adaptability to the random fluctuation and sudden change of tidal current velocity,and has good steady-state characteristics.
tidal current power systemimproved variable step hill-climbing methodmaximum power point tracking(MPPT)active disturbance rejection control(ADRC)
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