A Novel Maximum Power Point Tracking Control Without Steady State Oscillations Using Extremum Seeking Control Algorithm

The control design of conventionally developed algorithms for maximum power point tracking (MPPT) systems requires information about maximum power for the given irradiance, temperature and load conditions. The magnitude of maximum power point is highly dependent on the model parameters of the MPPT system and hence it is difficult to maintain maximum power throughout. The proposed control strategy does not require prior information about the maximum power point as well as is also successful to eliminate any offset present in the output power, increases the speed of convergence and damps the transient oscillations. PID controller in the Extremum Seeking Control (ESC) loop gives flexibility for selection of transient with some restrictions on the bandwidth. The comparative study is carried to show that the proposed controller is robust to the changes in temperature and irradiance levels. Finally the effectiveness of the proposed controller is validated by simulation using MATLAB and Simulink.